--- /dev/null
+#!/usr/bin/env perl
+
+# ====================================================================
+# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
+# project. The module is, however, dual licensed under OpenSSL and
+# CRYPTOGAMS licenses depending on where you obtain it. For further
+# details see http://www.openssl.org/~appro/cryptogams/.
+# ====================================================================
+#
+# ECP_NISTZ256 module for SPARCv9.
+#
+# February 2015.
+#
+# Original ECP_NISTZ256 submission targeting x86_64 is detailed in
+# http://eprint.iacr.org/2013/816. In the process of adaptation
+# original .c module was made 32-bit savvy in order to make this
+# implementation possible.
+#
+# with/without -DECP_NISTZ256_ASM
+# UltraSPARC III +12-18%
+# SPARC T4 +99-550% (+66-150% on 32-bit Solaris)
+#
+# Ranges denote minimum and maximum improvement coefficients depending
+# on benchmark. Lower coefficients are for ECDSA sign, server-side
+# operation. Keep in mind that +200% means 3x improvement.
+
+$code.=<<___;
+#include "sparc_arch.h"
+
+#define LOCALS (STACK_BIAS+STACK_FRAME)
+#ifdef __arch64__
+.register %g2,#scratch
+.register %g3,#scratch
+# define STACK64_FRAME STACK_FRAME
+# define LOCALS64 LOCALS
+#else
+# define STACK64_FRAME (2047+192)
+# define LOCALS64 STACK64_FRAME
+#endif
+
+.section ".text",#alloc,#execinstr
+___
+########################################################################
+# Convert ecp_nistz256_table.c to layout expected by ecp_nistz_gather_w7
+#
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+open TABLE,"<ecp_nistz256_table.c" or
+open TABLE,"<${dir}../ecp_nistz256_table.c" or
+die "failed to open ecp_nistz256_table.c:",$!;
+
+use integer;
+
+foreach(<TABLE>) {
+ s/TOBN\(\s*(0x[0-9a-f]+),\s*(0x[0-9a-f]+)\s*\)/push @arr,hex($2),hex($1)/geo;
+}
+close TABLE;
+
+# See ecp_nistz256_table.c for explanation for why it's 64*16*37.
+# 64*16*37-1 is because $#arr returns last valid index or @arr, not
+# amount of elements.
+die "insane number of elements" if ($#arr != 64*16*37-1);
+
+$code.=<<___;
+.globl ecp_nistz256_precomputed
+.align 4096
+ecp_nistz256_precomputed:
+___
+########################################################################
+# this conversion smashes P256_POINT_AFFINE by individual bytes with
+# 64 byte interval, similar to
+# 1111222233334444
+# 1234123412341234
+for(1..37) {
+ @tbl = splice(@arr,0,64*16);
+ for($i=0;$i<64;$i++) {
+ undef @line;
+ for($j=0;$j<64;$j++) {
+ push @line,(@tbl[$j*16+$i/4]>>(($i%4)*8))&0xff;
+ }
+ $code.=".byte\t";
+ $code.=join(',',map { sprintf "0x%02x",$_} @line);
+ $code.="\n";
+ }
+}
+
+{{{
+my ($rp,$ap,$bp)=map("%i$_",(0..2));
+my @acc=map("%l$_",(0..7));
+my ($t0,$t1,$t2,$t3,$t4,$t5,$t6,$t7)=(map("%o$_",(0..5)),"%g4","%g5");
+my ($bi,$a0,$mask,$carry)=(map("%i$_",(3..5)),"%g1");
+my ($rp_real,$ap_real)=("%g2","%g3");
+
+$code.=<<___;
+.size ecp_nistz256_precomputed,.-ecp_nistz256_precomputed
+.align 64
+.LRR: ! 2^512 mod P precomputed for NIST P256 polynomial
+.long 0x00000003, 0x00000000, 0xffffffff, 0xfffffffb
+.long 0xfffffffe, 0xffffffff, 0xfffffffd, 0x00000004
+.Lone:
+.long 1,0,0,0,0,0,0,0
+.asciz "ECP_NISTZ256 for SPARCv9, CRYPTOGAMS by <appro\@openssl.org>"
+
+! void ecp_nistz256_to_mont(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_to_mont
+.align 64
+ecp_nistz256_to_mont:
+ save %sp,-STACK_FRAME,%sp
+ nop
+1: call .+8
+ add %o7,.LRR-1b,$bp
+ call __ecp_nistz256_mul_mont
+ nop
+ ret
+ restore
+.size ecp_nistz256_to_mont,.-ecp_nistz256_to_mont
+
+! void ecp_nistz256_from_mont(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_from_mont
+.align 32
+ecp_nistz256_from_mont:
+ save %sp,-STACK_FRAME,%sp
+ nop
+1: call .+8
+ add %o7,.Lone-1b,$bp
+ call __ecp_nistz256_mul_mont
+ nop
+ ret
+ restore
+.size ecp_nistz256_from_mont,.-ecp_nistz256_from_mont
+
+! void ecp_nistz256_mul_mont(BN_ULONG %i0[8],const BN_ULONG %i1[8],
+! const BN_ULONG %i2[8]);
+.globl ecp_nistz256_mul_mont
+.align 32
+ecp_nistz256_mul_mont:
+ save %sp,-STACK_FRAME,%sp
+ nop
+ call __ecp_nistz256_mul_mont
+ nop
+ ret
+ restore
+.size ecp_nistz256_mul_mont,.-ecp_nistz256_mul_mont
+
+! void ecp_nistz256_sqr_mont(BN_ULONG %i0[8],const BN_ULONG %i2[8]);
+.globl ecp_nistz256_sqr_mont
+.align 32
+ecp_nistz256_sqr_mont:
+ save %sp,-STACK_FRAME,%sp
+ mov $ap,$bp
+ call __ecp_nistz256_mul_mont
+ nop
+ ret
+ restore
+.size ecp_nistz256_sqr_mont,.-ecp_nistz256_sqr_mont
+___
+
+########################################################################
+# Special thing to keep in mind is that $t0-$t7 hold 64-bit values,
+# while all others are meant to keep 32. "Meant to" means that additions
+# to @acc[0-7] do "contaminate" upper bits, but they are cleared before
+# they can affect outcome (follow 'and' with $mask). Also keep in mind
+# that addition with carry is addition with 32-bit carry, even though
+# CPU is 64-bit. [Addition with 64-bit carry was introduced in T3, see
+# below for VIS3 code paths.]
+
+$code.=<<___;
+.align 32
+__ecp_nistz256_mul_mont:
+ ld [$bp+0],$bi ! b[0]
+ mov -1,$mask
+ ld [$ap+0],$a0
+ srl $mask,0,$mask ! 0xffffffff
+ ld [$ap+4],$t1
+ ld [$ap+8],$t2
+ ld [$ap+12],$t3
+ ld [$ap+16],$t4
+ ld [$ap+20],$t5
+ ld [$ap+24],$t6
+ ld [$ap+28],$t7
+ mulx $a0,$bi,$t0 ! a[0-7]*b[0], 64-bit results
+ mulx $t1,$bi,$t1
+ mulx $t2,$bi,$t2
+ mulx $t3,$bi,$t3
+ mulx $t4,$bi,$t4
+ mulx $t5,$bi,$t5
+ mulx $t6,$bi,$t6
+ mulx $t7,$bi,$t7
+ srlx $t0,32,@acc[1] ! extract high parts
+ srlx $t1,32,@acc[2]
+ srlx $t2,32,@acc[3]
+ srlx $t3,32,@acc[4]
+ srlx $t4,32,@acc[5]
+ srlx $t5,32,@acc[6]
+ srlx $t6,32,@acc[7]
+ srlx $t7,32,@acc[0] ! "@acc[8]"
+ mov 0,$carry
+___
+for($i=1;$i<8;$i++) {
+$code.=<<___;
+ addcc @acc[1],$t1,@acc[1] ! accumulate high parts
+ ld [$bp+4*$i],$bi ! b[$i]
+ ld [$ap+4],$t1 ! re-load a[1-7]
+ addccc @acc[2],$t2,@acc[2]
+ addccc @acc[3],$t3,@acc[3]
+ ld [$ap+8],$t2
+ ld [$ap+12],$t3
+ addccc @acc[4],$t4,@acc[4]
+ addccc @acc[5],$t5,@acc[5]
+ ld [$ap+16],$t4
+ ld [$ap+20],$t5
+ addccc @acc[6],$t6,@acc[6]
+ addccc @acc[7],$t7,@acc[7]
+ ld [$ap+24],$t6
+ ld [$ap+28],$t7
+ addccc @acc[0],$carry,@acc[0] ! "@acc[8]"
+ addc %g0,%g0,$carry
+___
+ # Reduction iteration is normally performed by accumulating
+ # result of multiplication of modulus by "magic" digit [and
+ # omitting least significant word, which is guaranteed to
+ # be 0], but thanks to special form of modulus and "magic"
+ # digit being equal to least significant word, it can be
+ # performed with additions and subtractions alone. Indeed:
+ #
+ # ffff.0001.0000.0000.0000.ffff.ffff.ffff
+ # * abcd
+ # + xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.abcd
+ #
+ # Now observing that ff..ff*x = (2^n-1)*x = 2^n*x-x, we
+ # rewrite above as:
+ #
+ # xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.abcd
+ # + abcd.0000.abcd.0000.0000.abcd.0000.0000.0000
+ # - abcd.0000.0000.0000.0000.0000.0000.abcd
+ #
+ # or marking redundant operations:
+ #
+ # xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.----
+ # + abcd.0000.abcd.0000.0000.abcd.----.----.----
+ # - abcd.----.----.----.----.----.----.----
+
+$code.=<<___;
+ ! multiplication-less reduction
+ addcc @acc[3],$t0,@acc[3] ! r[3]+=r[0]
+ addccc @acc[4],%g0,@acc[4] ! r[4]+=0
+ and @acc[1],$mask,@acc[1]
+ and @acc[2],$mask,@acc[2]
+ addccc @acc[5],%g0,@acc[5] ! r[5]+=0
+ addccc @acc[6],$t0,@acc[6] ! r[6]+=r[0]
+ and @acc[3],$mask,@acc[3]
+ and @acc[4],$mask,@acc[4]
+ addccc @acc[7],%g0,@acc[7] ! r[7]+=0
+ addccc @acc[0],$t0,@acc[0] ! r[8]+=r[0] "@acc[8]"
+ and @acc[5],$mask,@acc[5]
+ and @acc[6],$mask,@acc[6]
+ addc $carry,%g0,$carry ! top-most carry
+ subcc @acc[7],$t0,@acc[7] ! r[7]-=r[0]
+ subccc @acc[0],%g0,@acc[0] ! r[8]-=0 "@acc[8]"
+ subc $carry,%g0,$carry ! top-most carry
+ and @acc[7],$mask,@acc[7]
+ and @acc[0],$mask,@acc[0] ! "@acc[8]"
+___
+ push(@acc,shift(@acc)); # rotate registers to "omit" acc[0]
+$code.=<<___;
+ mulx $a0,$bi,$t0 ! a[0-7]*b[$i], 64-bit results
+ mulx $t1,$bi,$t1
+ mulx $t2,$bi,$t2
+ mulx $t3,$bi,$t3
+ mulx $t4,$bi,$t4
+ mulx $t5,$bi,$t5
+ mulx $t6,$bi,$t6
+ mulx $t7,$bi,$t7
+ add @acc[0],$t0,$t0 ! accumulate low parts, can't overflow
+ add @acc[1],$t1,$t1
+ srlx $t0,32,@acc[1] ! extract high parts
+ add @acc[2],$t2,$t2
+ srlx $t1,32,@acc[2]
+ add @acc[3],$t3,$t3
+ srlx $t2,32,@acc[3]
+ add @acc[4],$t4,$t4
+ srlx $t3,32,@acc[4]
+ add @acc[5],$t5,$t5
+ srlx $t4,32,@acc[5]
+ add @acc[6],$t6,$t6
+ srlx $t5,32,@acc[6]
+ add @acc[7],$t7,$t7
+ srlx $t6,32,@acc[7]
+ srlx $t7,32,@acc[0] ! "@acc[8]"
+___
+}
+$code.=<<___;
+ addcc @acc[1],$t1,@acc[1] ! accumulate high parts
+ addccc @acc[2],$t2,@acc[2]
+ addccc @acc[3],$t3,@acc[3]
+ addccc @acc[4],$t4,@acc[4]
+ addccc @acc[5],$t5,@acc[5]
+ addccc @acc[6],$t6,@acc[6]
+ addccc @acc[7],$t7,@acc[7]
+ addccc @acc[0],$carry,@acc[0] ! "@acc[8]"
+ addc %g0,%g0,$carry
+
+ addcc @acc[3],$t0,@acc[3] ! multiplication-less reduction
+ addccc @acc[4],%g0,@acc[4]
+ addccc @acc[5],%g0,@acc[5]
+ addccc @acc[6],$t0,@acc[6]
+ addccc @acc[7],%g0,@acc[7]
+ addccc @acc[0],$t0,@acc[0] ! "@acc[8]"
+ addc $carry,%g0,$carry
+ subcc @acc[7],$t0,@acc[7]
+ subccc @acc[0],%g0,@acc[0] ! "@acc[8]"
+ subc $carry,%g0,$carry ! top-most carry
+___
+ push(@acc,shift(@acc)); # rotate registers to omit acc[0]
+$code.=<<___;
+ ! Final step is "if result > mod, subtract mod", but we do it
+ ! "other way around", namely subtract modulus from result
+ ! and if it borrowed, add modulus back.
+
+ subcc @acc[0],-1,@acc[0] ! subtract modulus
+ subccc @acc[1],-1,@acc[1]
+ subccc @acc[2],-1,@acc[2]
+ subccc @acc[3],0,@acc[3]
+ subccc @acc[4],0,@acc[4]
+ subccc @acc[5],0,@acc[5]
+ subccc @acc[6],1,@acc[6]
+ subccc @acc[7],-1,@acc[7]
+ subc $carry,0,$carry ! broadcast borrow bit
+
+ ! Note that because mod has special form, i.e. consists of
+ ! 0xffffffff, 1 and 0s, we can conditionally synthesize it by
+ ! using value of broadcasted borrow and the borrow bit itself.
+ ! To minimize dependency chain we first broadcast and then
+ ! extract the bit by negating (follow $bi).
+
+ addcc @acc[0],$carry,@acc[0] ! add modulus or zero
+ addccc @acc[1],$carry,@acc[1]
+ neg $carry,$bi
+ st @acc[0],[$rp]
+ addccc @acc[2],$carry,@acc[2]
+ st @acc[1],[$rp+4]
+ addccc @acc[3],0,@acc[3]
+ st @acc[2],[$rp+8]
+ addccc @acc[4],0,@acc[4]
+ st @acc[3],[$rp+12]
+ addccc @acc[5],0,@acc[5]
+ st @acc[4],[$rp+16]
+ addccc @acc[6],$bi,@acc[6]
+ st @acc[5],[$rp+20]
+ addc @acc[7],$carry,@acc[7]
+ st @acc[6],[$rp+24]
+ retl
+ st @acc[7],[$rp+28]
+.size __ecp_nistz256_mul_mont,.-__ecp_nistz256_mul_mont
+
+! void ecp_nistz256_add(BN_ULONG %i0[8],const BN_ULONG %i1[8],
+! const BN_ULONG %i2[8]);
+.globl ecp_nistz256_add
+.align 32
+ecp_nistz256_add:
+ save %sp,-STACK_FRAME,%sp
+ ld [$ap],@acc[0]
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ call __ecp_nistz256_add
+ ld [$ap+28],@acc[7]
+ ret
+ restore
+.size ecp_nistz256_add,.-ecp_nistz256_add
+
+.align 32
+__ecp_nistz256_add:
+ ld [$bp+0],$t0 ! b[0]
+ ld [$bp+4],$t1
+ ld [$bp+8],$t2
+ ld [$bp+12],$t3
+ addcc @acc[0],$t0,@acc[0]
+ ld [$bp+16],$t4
+ ld [$bp+20],$t5
+ addccc @acc[1],$t1,@acc[1]
+ ld [$bp+24],$t6
+ ld [$bp+28],$t7
+ addccc @acc[2],$t2,@acc[2]
+ addccc @acc[3],$t3,@acc[3]
+ addccc @acc[4],$t4,@acc[4]
+ addccc @acc[5],$t5,@acc[5]
+ addccc @acc[6],$t6,@acc[6]
+ addccc @acc[7],$t7,@acc[7]
+ subc %g0,%g0,$carry ! broadcast carry bit
+
+.Lreduce_by_sub:
+
+ ! if a+b carries, subtract modulus.
+ !
+ ! Note that because mod has special form, i.e. consists of
+ ! 0xffffffff, 1 and 0s, we can conditionally synthesize it by
+ ! using value of broadcasted borrow and the borrow bit itself.
+ ! To minimize dependency chain we first broadcast and then
+ ! extract the bit by negating (follow $bi).
+
+ subcc @acc[0],$carry,@acc[0] ! subtract synthesized modulus
+ subccc @acc[1],$carry,@acc[1]
+ neg $carry,$bi
+ st @acc[0],[$rp]
+ subccc @acc[2],$carry,@acc[2]
+ st @acc[1],[$rp+4]
+ subccc @acc[3],0,@acc[3]
+ st @acc[2],[$rp+8]
+ subccc @acc[4],0,@acc[4]
+ st @acc[3],[$rp+12]
+ subccc @acc[5],0,@acc[5]
+ st @acc[4],[$rp+16]
+ subccc @acc[6],$bi,@acc[6]
+ st @acc[5],[$rp+20]
+ subc @acc[7],$carry,@acc[7]
+ st @acc[6],[$rp+24]
+ retl
+ st @acc[7],[$rp+28]
+.size __ecp_nistz256_add,.-__ecp_nistz256_add
+
+! void ecp_nistz256_mul_by_2(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_mul_by_2
+.align 32
+ecp_nistz256_mul_by_2:
+ save %sp,-STACK_FRAME,%sp
+ ld [$ap],@acc[0]
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ call __ecp_nistz256_mul_by_2
+ ld [$ap+28],@acc[7]
+ ret
+ restore
+.size ecp_nistz256_mul_by_2,.-ecp_nistz256_mul_by_2
+
+.align 32
+__ecp_nistz256_mul_by_2:
+ addcc @acc[0],@acc[0],@acc[0] ! a+a=2*a
+ addccc @acc[1],@acc[1],@acc[1]
+ addccc @acc[2],@acc[2],@acc[2]
+ addccc @acc[3],@acc[3],@acc[3]
+ addccc @acc[4],@acc[4],@acc[4]
+ addccc @acc[5],@acc[5],@acc[5]
+ addccc @acc[6],@acc[6],@acc[6]
+ addccc @acc[7],@acc[7],@acc[7]
+ b .Lreduce_by_sub
+ subc %g0,%g0,$carry ! broadcast carry bit
+.size __ecp_nistz256_mul_by_2,.-__ecp_nistz256_mul_by_2
+
+! void ecp_nistz256_mul_by_3(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_mul_by_3
+.align 32
+ecp_nistz256_mul_by_3:
+ save %sp,-STACK_FRAME,%sp
+ ld [$ap],@acc[0]
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ call __ecp_nistz256_mul_by_3
+ ld [$ap+28],@acc[7]
+ ret
+ restore
+.size ecp_nistz256_mul_by_3,.-ecp_nistz256_mul_by_3
+
+.align 32
+__ecp_nistz256_mul_by_3:
+ addcc @acc[0],@acc[0],$t0 ! a+a=2*a
+ addccc @acc[1],@acc[1],$t1
+ addccc @acc[2],@acc[2],$t2
+ addccc @acc[3],@acc[3],$t3
+ addccc @acc[4],@acc[4],$t4
+ addccc @acc[5],@acc[5],$t5
+ addccc @acc[6],@acc[6],$t6
+ addccc @acc[7],@acc[7],$t7
+ subc %g0,%g0,$carry ! broadcast carry bit
+
+ subcc $t0,$carry,$t0 ! .Lreduce_by_sub but without stores
+ neg $carry,$bi
+ subccc $t1,$carry,$t1
+ subccc $t2,$carry,$t2
+ subccc $t3,0,$t3
+ subccc $t4,0,$t4
+ subccc $t5,0,$t5
+ subccc $t6,$bi,$t6
+ subc $t7,$carry,$t7
+
+ addcc $t0,@acc[0],@acc[0] ! 2*a+a=3*a
+ addccc $t1,@acc[1],@acc[1]
+ addccc $t2,@acc[2],@acc[2]
+ addccc $t3,@acc[3],@acc[3]
+ addccc $t4,@acc[4],@acc[4]
+ addccc $t5,@acc[5],@acc[5]
+ addccc $t6,@acc[6],@acc[6]
+ addccc $t7,@acc[7],@acc[7]
+ b .Lreduce_by_sub
+ subc %g0,%g0,$carry ! broadcast carry bit
+.size __ecp_nistz256_mul_by_3,.-__ecp_nistz256_mul_by_3
+
+! void ecp_nistz256_sub(BN_ULONG %i0[8],const BN_ULONG %i1[8],
+! const BN_ULONG %i2[8]);
+.globl ecp_nistz256_sub
+.align 32
+ecp_nistz256_sub:
+ save %sp,-STACK_FRAME,%sp
+ ld [$ap],@acc[0]
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ call __ecp_nistz256_sub_from
+ ld [$ap+28],@acc[7]
+ ret
+ restore
+.size ecp_nistz256_sub,.-ecp_nistz256_sub
+
+! void ecp_nistz256_neg(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_neg
+.align 32
+ecp_nistz256_neg:
+ save %sp,-STACK_FRAME,%sp
+ mov $ap,$bp
+ mov 0,@acc[0]
+ mov 0,@acc[1]
+ mov 0,@acc[2]
+ mov 0,@acc[3]
+ mov 0,@acc[4]
+ mov 0,@acc[5]
+ mov 0,@acc[6]
+ call __ecp_nistz256_sub_from
+ mov 0,@acc[7]
+ ret
+ restore
+.size ecp_nistz256_neg,.-ecp_nistz256_neg
+
+.align 32
+__ecp_nistz256_sub_from:
+ ld [$bp+0],$t0 ! b[0]
+ ld [$bp+4],$t1
+ ld [$bp+8],$t2
+ ld [$bp+12],$t3
+ subcc @acc[0],$t0,@acc[0]
+ ld [$bp+16],$t4
+ ld [$bp+20],$t5
+ subccc @acc[1],$t1,@acc[1]
+ subccc @acc[2],$t2,@acc[2]
+ ld [$bp+24],$t6
+ ld [$bp+28],$t7
+ subccc @acc[3],$t3,@acc[3]
+ subccc @acc[4],$t4,@acc[4]
+ subccc @acc[5],$t5,@acc[5]
+ subccc @acc[6],$t6,@acc[6]
+ subccc @acc[7],$t7,@acc[7]
+ subc %g0,%g0,$carry ! broadcast borrow bit
+
+.Lreduce_by_add:
+
+ ! if a-b borrows, add modulus.
+ !
+ ! Note that because mod has special form, i.e. consists of
+ ! 0xffffffff, 1 and 0s, we can conditionally synthesize it by
+ ! using value of broadcasted borrow and the borrow bit itself.
+ ! To minimize dependency chain we first broadcast and then
+ ! extract the bit by negating (follow $bi).
+
+ addcc @acc[0],$carry,@acc[0] ! add synthesized modulus
+ addccc @acc[1],$carry,@acc[1]
+ neg $carry,$bi
+ st @acc[0],[$rp]
+ addccc @acc[2],$carry,@acc[2]
+ st @acc[1],[$rp+4]
+ addccc @acc[3],0,@acc[3]
+ st @acc[2],[$rp+8]
+ addccc @acc[4],0,@acc[4]
+ st @acc[3],[$rp+12]
+ addccc @acc[5],0,@acc[5]
+ st @acc[4],[$rp+16]
+ addccc @acc[6],$bi,@acc[6]
+ st @acc[5],[$rp+20]
+ addc @acc[7],$carry,@acc[7]
+ st @acc[6],[$rp+24]
+ retl
+ st @acc[7],[$rp+28]
+.size __ecp_nistz256_sub_from,.-__ecp_nistz256_sub_from
+
+.align 32
+__ecp_nistz256_sub_morf:
+ ld [$bp+0],$t0 ! b[0]
+ ld [$bp+4],$t1
+ ld [$bp+8],$t2
+ ld [$bp+12],$t3
+ subcc $t0,@acc[0],@acc[0]
+ ld [$bp+16],$t4
+ ld [$bp+20],$t5
+ subccc $t1,@acc[1],@acc[1]
+ subccc $t2,@acc[2],@acc[2]
+ ld [$bp+24],$t6
+ ld [$bp+28],$t7
+ subccc $t3,@acc[3],@acc[3]
+ subccc $t4,@acc[4],@acc[4]
+ subccc $t5,@acc[5],@acc[5]
+ subccc $t6,@acc[6],@acc[6]
+ subccc $t7,@acc[7],@acc[7]
+ b .Lreduce_by_add
+ subc %g0,%g0,$carry ! broadcast borrow bit
+.size __ecp_nistz256_sub_morf,.-__ecp_nistz256_sub_morf
+
+! void ecp_nistz256_div_by_2(BN_ULONG %i0[8],const BN_ULONG %i1[8]);
+.globl ecp_nistz256_div_by_2
+.align 32
+ecp_nistz256_div_by_2:
+ save %sp,-STACK_FRAME,%sp
+ ld [$ap],@acc[0]
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ call __ecp_nistz256_div_by_2
+ ld [$ap+28],@acc[7]
+ ret
+ restore
+.size ecp_nistz256_div_by_2,.-ecp_nistz256_div_by_2
+
+.align 32
+__ecp_nistz256_div_by_2:
+ ! ret = (a is odd ? a+mod : a) >> 1
+
+ and @acc[0],1,$bi
+ neg $bi,$carry
+ addcc @acc[0],$carry,@acc[0]
+ addccc @acc[1],$carry,@acc[1]
+ addccc @acc[2],$carry,@acc[2]
+ addccc @acc[3],0,@acc[3]
+ addccc @acc[4],0,@acc[4]
+ addccc @acc[5],0,@acc[5]
+ addccc @acc[6],$bi,@acc[6]
+ addccc @acc[7],$carry,@acc[7]
+ addc %g0,%g0,$carry
+
+ ! ret >>= 1
+
+ srl @acc[0],1,@acc[0]
+ sll @acc[1],31,$t0
+ srl @acc[1],1,@acc[1]
+ or @acc[0],$t0,@acc[0]
+ sll @acc[2],31,$t1
+ srl @acc[2],1,@acc[2]
+ or @acc[1],$t1,@acc[1]
+ sll @acc[3],31,$t2
+ st @acc[0],[$rp]
+ srl @acc[3],1,@acc[3]
+ or @acc[2],$t2,@acc[2]
+ sll @acc[4],31,$t3
+ st @acc[1],[$rp+4]
+ srl @acc[4],1,@acc[4]
+ or @acc[3],$t3,@acc[3]
+ sll @acc[5],31,$t4
+ st @acc[2],[$rp+8]
+ srl @acc[5],1,@acc[5]
+ or @acc[4],$t4,@acc[4]
+ sll @acc[6],31,$t5
+ st @acc[3],[$rp+12]
+ srl @acc[6],1,@acc[6]
+ or @acc[5],$t5,@acc[5]
+ sll @acc[7],31,$t6
+ st @acc[4],[$rp+16]
+ srl @acc[7],1,@acc[7]
+ or @acc[6],$t6,@acc[6]
+ sll $carry,31,$t7
+ st @acc[5],[$rp+20]
+ or @acc[7],$t7,@acc[7]
+ st @acc[6],[$rp+24]
+ retl
+ st @acc[7],[$rp+28]
+.size __ecp_nistz256_div_by_2,.-__ecp_nistz256_div_by_2
+___
+
+########################################################################
+# following subroutines are "literal" implemetation of those found in
+# ecp_nistz256.c
+#
+########################################################################
+# void ecp_nistz256_point_double(P256_POINT *out,const P256_POINT *inp);
+#
+{
+my ($S,$M,$Zsqr,$tmp0)=map(32*$_,(0..3));
+# above map() describes stack layout with 4 temporary
+# 256-bit vectors on top.
+
+$code.=<<___;
+#ifdef __PIC__
+SPARC_PIC_THUNK(%g1)
+#endif
+
+.globl ecp_nistz256_point_double
+.align 32
+ecp_nistz256_point_double:
+ SPARC_LOAD_ADDRESS_LEAF(OPENSSL_sparcv9cap_P,%g1,%g5)
+ ld [%g1],%g1 ! OPENSSL_sparcv9cap_P[0]
+ and %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK),%g1
+ cmp %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK)
+ be ecp_nistz256_point_double_vis3
+ nop
+
+ save %sp,-STACK_FRAME-32*4,%sp
+
+ mov $rp,$rp_real
+ mov $ap,$ap_real
+
+ ld [$ap+32],@acc[0]
+ ld [$ap+32+4],@acc[1]
+ ld [$ap+32+8],@acc[2]
+ ld [$ap+32+12],@acc[3]
+ ld [$ap+32+16],@acc[4]
+ ld [$ap+32+20],@acc[5]
+ ld [$ap+32+24],@acc[6]
+ ld [$ap+32+28],@acc[7]
+ call __ecp_nistz256_mul_by_2 ! p256_mul_by_2(S, in_y);
+ add %sp,LOCALS+$S,$rp
+
+ add $ap_real,64,$bp
+ add $ap_real,64,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Zsqr, in_z);
+ add %sp,LOCALS+$Zsqr,$rp
+
+ add $ap_real,0,$bp
+ call __ecp_nistz256_add ! p256_add(M, Zsqr, in_x);
+ add %sp,LOCALS+$M,$rp
+
+ add %sp,LOCALS+$S,$bp
+ add %sp,LOCALS+$S,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(S, S);
+ add %sp,LOCALS+$S,$rp
+
+ ld [$ap_real],@acc[0]
+ add %sp,LOCALS+$Zsqr,$bp
+ ld [$ap_real+4],@acc[1]
+ ld [$ap_real+8],@acc[2]
+ ld [$ap_real+12],@acc[3]
+ ld [$ap_real+16],@acc[4]
+ ld [$ap_real+20],@acc[5]
+ ld [$ap_real+24],@acc[6]
+ ld [$ap_real+28],@acc[7]
+ call __ecp_nistz256_sub_from ! p256_sub(Zsqr, in_x, Zsqr);
+ add %sp,LOCALS+$Zsqr,$rp
+
+ add $ap_real,32,$bp
+ add $ap_real,64,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(tmp0, in_z, in_y);
+ add %sp,LOCALS+$tmp0,$rp
+
+ call __ecp_nistz256_mul_by_2 ! p256_mul_by_2(res_z, tmp0);
+ add $rp_real,64,$rp
+
+ add %sp,LOCALS+$Zsqr,$bp
+ add %sp,LOCALS+$M,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(M, M, Zsqr);
+ add %sp,LOCALS+$M,$rp
+
+ call __ecp_nistz256_mul_by_3 ! p256_mul_by_3(M, M);
+ add %sp,LOCALS+$M,$rp
+
+ add %sp,LOCALS+$S,$bp
+ add %sp,LOCALS+$S,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(tmp0, S);
+ add %sp,LOCALS+$tmp0,$rp
+
+ call __ecp_nistz256_div_by_2 ! p256_div_by_2(res_y, tmp0);
+ add $rp_real,32,$rp
+
+ add $ap_real,0,$bp
+ add %sp,LOCALS+$S,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S, S, in_x);
+ add %sp,LOCALS+$S,$rp
+
+ call __ecp_nistz256_mul_by_2 ! p256_mul_by_2(tmp0, S);
+ add %sp,LOCALS+$tmp0,$rp
+
+ add %sp,LOCALS+$M,$bp
+ add %sp,LOCALS+$M,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(res_x, M);
+ add $rp_real,0,$rp
+
+ add %sp,LOCALS+$tmp0,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_x, res_x, tmp0);
+ add $rp_real,0,$rp
+
+ add %sp,LOCALS+$S,$bp
+ call __ecp_nistz256_sub_morf ! p256_sub(S, S, res_x);
+ add %sp,LOCALS+$S,$rp
+
+ add %sp,LOCALS+$M,$bp
+ add %sp,LOCALS+$S,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S, S, M);
+ add %sp,LOCALS+$S,$rp
+
+ add $rp_real,32,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_y, S, res_y);
+ add $rp_real,32,$rp
+
+ ret
+ restore
+.size ecp_nistz256_point_double,.-ecp_nistz256_point_double
+___
+}
+
+########################################################################
+# void ecp_nistz256_point_add(P256_POINT *out,const P256_POINT *in1,
+# const P256_POINT *in2);
+{
+my ($res_x,$res_y,$res_z,
+ $H,$Hsqr,$R,$Rsqr,$Hcub,
+ $U1,$U2,$S1,$S2)=map(32*$_,(0..11));
+my ($Z1sqr, $Z2sqr) = ($Hsqr, $Rsqr);
+
+# above map() describes stack layout with 12 temporary
+# 256-bit vectors on top. Then we reserve some space for
+# !in1infty, !in2infty, result of check for zero and return pointer.
+
+my $bp_real=$rp_real;
+
+$code.=<<___;
+.globl ecp_nistz256_point_add
+.align 32
+ecp_nistz256_point_add:
+ SPARC_LOAD_ADDRESS_LEAF(OPENSSL_sparcv9cap_P,%g1,%g5)
+ ld [%g1],%g1 ! OPENSSL_sparcv9cap_P[0]
+ and %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK),%g1
+ cmp %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK)
+ be ecp_nistz256_point_add_vis3
+ nop
+
+ save %sp,-STACK_FRAME-32*12-32,%sp
+
+ stx $rp,[%fp+STACK_BIAS-8] ! off-load $rp
+ mov $ap,$ap_real
+ mov $bp,$bp_real
+
+ ld [$bp],@acc[0] ! in2_x
+ ld [$bp+4],@acc[1]
+ ld [$bp+8],@acc[2]
+ ld [$bp+12],@acc[3]
+ ld [$bp+16],@acc[4]
+ ld [$bp+20],@acc[5]
+ ld [$bp+24],@acc[6]
+ ld [$bp+28],@acc[7]
+ ld [$bp+32],$t0 ! in2_y
+ ld [$bp+32+4],$t1
+ ld [$bp+32+8],$t2
+ ld [$bp+32+12],$t3
+ ld [$bp+32+16],$t4
+ ld [$bp+32+20],$t5
+ ld [$bp+32+24],$t6
+ ld [$bp+32+28],$t7
+ or @acc[1],@acc[0],@acc[0]
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ or @acc[4],@acc[0],@acc[0]
+ or $t1,$t0,$t0
+ or $t3,$t2,$t2
+ or $t5,$t4,$t4
+ or $t7,$t6,$t6
+ or $t2,$t0,$t0
+ or $t6,$t4,$t4
+ or $t4,$t0,$t0
+ or @acc[0],$t0,$t0 ! !in2infty
+ movrnz $t0,-1,$t0
+ st $t0,[%fp+STACK_BIAS-12]
+
+ ld [$ap],@acc[0] ! in1_x
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ ld [$ap+28],@acc[7]
+ ld [$ap+32],$t0 ! in1_y
+ ld [$ap+32+4],$t1
+ ld [$ap+32+8],$t2
+ ld [$ap+32+12],$t3
+ ld [$ap+32+16],$t4
+ ld [$ap+32+20],$t5
+ ld [$ap+32+24],$t6
+ ld [$ap+32+28],$t7
+ or @acc[1],@acc[0],@acc[0]
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ or @acc[4],@acc[0],@acc[0]
+ or $t1,$t0,$t0
+ or $t3,$t2,$t2
+ or $t5,$t4,$t4
+ or $t7,$t6,$t6
+ or $t2,$t0,$t0
+ or $t6,$t4,$t4
+ or $t4,$t0,$t0
+ or @acc[0],$t0,$t0 ! !in1infty
+ movrnz $t0,-1,$t0
+ st $t0,[%fp+STACK_BIAS-16]
+
+ add $bp_real,64,$bp
+ add $bp_real,64,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Z2sqr, in2_z);
+ add %sp,LOCALS+$Z2sqr,$rp
+
+ add $ap_real,64,$bp
+ add $ap_real,64,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Z1sqr, in1_z);
+ add %sp,LOCALS+$Z1sqr,$rp
+
+ add $bp_real,64,$bp
+ add %sp,LOCALS+$Z2sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S1, Z2sqr, in2_z);
+ add %sp,LOCALS+$S1,$rp
+
+ add $ap_real,64,$bp
+ add %sp,LOCALS+$Z1sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, Z1sqr, in1_z);
+ add %sp,LOCALS+$S2,$rp
+
+ add $ap_real,32,$bp
+ add %sp,LOCALS+$S1,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S1, S1, in1_y);
+ add %sp,LOCALS+$S1,$rp
+
+ add $bp_real,32,$bp
+ add %sp,LOCALS+$S2,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, S2, in2_y);
+ add %sp,LOCALS+$S2,$rp
+
+ add %sp,LOCALS+$S1,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(R, S2, S1);
+ add %sp,LOCALS+$R,$rp
+
+ or @acc[1],@acc[0],@acc[0] ! see if result is zero
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ or @acc[4],@acc[0],@acc[0]
+ st @acc[0],[%fp+STACK_BIAS-20]
+
+ add $ap_real,0,$bp
+ add %sp,LOCALS+$Z2sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(U1, in1_x, Z2sqr);
+ add %sp,LOCALS+$U1,$rp
+
+ add $bp_real,0,$bp
+ add %sp,LOCALS+$Z1sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(U2, in2_x, Z1sqr);
+ add %sp,LOCALS+$U2,$rp
+
+ add %sp,LOCALS+$U1,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(H, U2, U1);
+ add %sp,LOCALS+$H,$rp
+
+ or @acc[1],@acc[0],@acc[0] ! see if result is zero
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ orcc @acc[4],@acc[0],@acc[0]
+
+ bne,pt %icc,.Ladd_proceed ! is_equal(U1,U2)?
+ nop
+
+ ld [%fp+STACK_BIAS-12],$t0
+ ld [%fp+STACK_BIAS-16],$t1
+ ld [%fp+STACK_BIAS-20],$t2
+ andcc $t0,$t1,%g0
+ be,pt %icc,.Ladd_proceed ! (in1infty || in2infty)?
+ nop
+ andcc $t2,$t2,%g0
+ be,pt %icc,.Ladd_proceed ! is_equal(S1,S2)?
+ nop
+
+ ldx [%fp+STACK_BIAS-8],$rp
+ st %g0,[$rp]
+ st %g0,[$rp+4]
+ st %g0,[$rp+8]
+ st %g0,[$rp+12]
+ st %g0,[$rp+16]
+ st %g0,[$rp+20]
+ st %g0,[$rp+24]
+ st %g0,[$rp+28]
+ st %g0,[$rp+32]
+ st %g0,[$rp+32+4]
+ st %g0,[$rp+32+8]
+ st %g0,[$rp+32+12]
+ st %g0,[$rp+32+16]
+ st %g0,[$rp+32+20]
+ st %g0,[$rp+32+24]
+ st %g0,[$rp+32+28]
+ st %g0,[$rp+64]
+ st %g0,[$rp+64+4]
+ st %g0,[$rp+64+8]
+ st %g0,[$rp+64+12]
+ st %g0,[$rp+64+16]
+ st %g0,[$rp+64+20]
+ st %g0,[$rp+64+24]
+ st %g0,[$rp+64+28]
+ b .Ladd_done
+ nop
+
+.align 16
+.Ladd_proceed:
+ add %sp,LOCALS+$R,$bp
+ add %sp,LOCALS+$R,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Rsqr, R);
+ add %sp,LOCALS+$Rsqr,$rp
+
+ add $ap_real,64,$bp
+ add %sp,LOCALS+$H,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(res_z, H, in1_z);
+ add %sp,LOCALS+$res_z,$rp
+
+ add %sp,LOCALS+$H,$bp
+ add %sp,LOCALS+$H,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Hsqr, H);
+ add %sp,LOCALS+$Hsqr,$rp
+
+ add $bp_real,64,$bp
+ add %sp,LOCALS+$res_z,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(res_z, res_z, in2_z);
+ add %sp,LOCALS+$res_z,$rp
+
+ add %sp,LOCALS+$H,$bp
+ add %sp,LOCALS+$Hsqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(Hcub, Hsqr, H);
+ add %sp,LOCALS+$Hcub,$rp
+
+ add %sp,LOCALS+$U1,$bp
+ add %sp,LOCALS+$Hsqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(U2, U1, Hsqr);
+ add %sp,LOCALS+$U2,$rp
+
+ call __ecp_nistz256_mul_by_2 ! p256_mul_by_2(Hsqr, U2);
+ add %sp,LOCALS+$Hsqr,$rp
+
+ add %sp,LOCALS+$Rsqr,$bp
+ call __ecp_nistz256_sub_morf ! p256_sub(res_x, Rsqr, Hsqr);
+ add %sp,LOCALS+$res_x,$rp
+
+ add %sp,LOCALS+$Hcub,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_x, res_x, Hcub);
+ add %sp,LOCALS+$res_x,$rp
+
+ add %sp,LOCALS+$U2,$bp
+ call __ecp_nistz256_sub_morf ! p256_sub(res_y, U2, res_x);
+ add %sp,LOCALS+$res_y,$rp
+
+ add %sp,LOCALS+$Hcub,$bp
+ add %sp,LOCALS+$S1,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, S1, Hcub);
+ add %sp,LOCALS+$S2,$rp
+
+ add %sp,LOCALS+$R,$bp
+ add %sp,LOCALS+$res_y,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(res_y, res_y, R);
+ add %sp,LOCALS+$res_y,$rp
+
+ add %sp,LOCALS+$S2,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_y, res_y, S2);
+ add %sp,LOCALS+$res_y,$rp
+
+ ld [%fp+STACK_BIAS-16],$t1 ! !in1infty
+ ld [%fp+STACK_BIAS-12],$t2 ! !in2infty
+ ldx [%fp+STACK_BIAS-8],$rp
+___
+for($i=0;$i<96;$i+=8) { # conditional moves
+$code.=<<___;
+ ld [%sp+LOCALS+$i],@acc[0] ! res
+ ld [%sp+LOCALS+$i+4],@acc[1]
+ ld [$bp_real+$i],@acc[2] ! in2
+ ld [$bp_real+$i+4],@acc[3]
+ ld [$ap_real+$i],@acc[4] ! in1
+ ld [$ap_real+$i+4],@acc[5]
+ movrz $t1,@acc[2],@acc[0]
+ movrz $t1,@acc[3],@acc[1]
+ movrz $t2,@acc[4],@acc[0]
+ movrz $t2,@acc[5],@acc[1]
+ st @acc[0],[$rp+$i]
+ st @acc[1],[$rp+$i+4]
+___
+}
+$code.=<<___;
+.Ladd_done:
+ ret
+ restore
+.size ecp_nistz256_point_add,.-ecp_nistz256_point_add
+___
+}
+
+########################################################################
+# void ecp_nistz256_point_add_affine(P256_POINT *out,const P256_POINT *in1,
+# const P256_POINT_AFFINE *in2);
+{
+my ($res_x,$res_y,$res_z,
+ $U2,$S2,$H,$R,$Hsqr,$Hcub,$Rsqr)=map(32*$_,(0..9));
+my $Z1sqr = $S2;
+# above map() describes stack layout with 10 temporary
+# 256-bit vectors on top. Then we reserve some space for
+# !in1infty, !in2infty, result of check for zero and return pointer.
+
+my @ONE_mont=(1,0,0,-1,-1,-1,-2,0);
+my $bp_real=$rp_real;
+
+$code.=<<___;
+.globl ecp_nistz256_point_add_affine
+.align 32
+ecp_nistz256_point_add_affine:
+ SPARC_LOAD_ADDRESS_LEAF(OPENSSL_sparcv9cap_P,%g1,%g5)
+ ld [%g1],%g1 ! OPENSSL_sparcv9cap_P[0]
+ and %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK),%g1
+ cmp %g1,(SPARCV9_VIS3|SPARCV9_64BIT_STACK)
+ be ecp_nistz256_point_add_affine_vis3
+ nop
+
+ save %sp,-STACK_FRAME-32*10-32,%sp
+
+ stx $rp,[%fp+STACK_BIAS-8] ! off-load $rp
+ mov $ap,$ap_real
+ mov $bp,$bp_real
+
+ ld [$ap],@acc[0] ! in1_x
+ ld [$ap+4],@acc[1]
+ ld [$ap+8],@acc[2]
+ ld [$ap+12],@acc[3]
+ ld [$ap+16],@acc[4]
+ ld [$ap+20],@acc[5]
+ ld [$ap+24],@acc[6]
+ ld [$ap+28],@acc[7]
+ ld [$ap+32],$t0 ! in1_y
+ ld [$ap+32+4],$t1
+ ld [$ap+32+8],$t2
+ ld [$ap+32+12],$t3
+ ld [$ap+32+16],$t4
+ ld [$ap+32+20],$t5
+ ld [$ap+32+24],$t6
+ ld [$ap+32+28],$t7
+ or @acc[1],@acc[0],@acc[0]
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ or @acc[4],@acc[0],@acc[0]
+ or $t1,$t0,$t0
+ or $t3,$t2,$t2
+ or $t5,$t4,$t4
+ or $t7,$t6,$t6
+ or $t2,$t0,$t0
+ or $t6,$t4,$t4
+ or $t4,$t0,$t0
+ or @acc[0],$t0,$t0 ! !in1infty
+ movrnz $t0,-1,$t0
+ st $t0,[%fp+STACK_BIAS-16]
+
+ ld [$bp],@acc[0] ! in2_x
+ ld [$bp+4],@acc[1]
+ ld [$bp+8],@acc[2]
+ ld [$bp+12],@acc[3]
+ ld [$bp+16],@acc[4]
+ ld [$bp+20],@acc[5]
+ ld [$bp+24],@acc[6]
+ ld [$bp+28],@acc[7]
+ ld [$bp+32],$t0 ! in2_y
+ ld [$bp+32+4],$t1
+ ld [$bp+32+8],$t2
+ ld [$bp+32+12],$t3
+ ld [$bp+32+16],$t4
+ ld [$bp+32+20],$t5
+ ld [$bp+32+24],$t6
+ ld [$bp+32+28],$t7
+ or @acc[1],@acc[0],@acc[0]
+ or @acc[3],@acc[2],@acc[2]
+ or @acc[5],@acc[4],@acc[4]
+ or @acc[7],@acc[6],@acc[6]
+ or @acc[2],@acc[0],@acc[0]
+ or @acc[6],@acc[4],@acc[4]
+ or @acc[4],@acc[0],@acc[0]
+ or $t1,$t0,$t0
+ or $t3,$t2,$t2
+ or $t5,$t4,$t4
+ or $t7,$t6,$t6
+ or $t2,$t0,$t0
+ or $t6,$t4,$t4
+ or $t4,$t0,$t0
+ or @acc[0],$t0,$t0 ! !in2infty
+ movrnz $t0,-1,$t0
+ st $t0,[%fp+STACK_BIAS-12]
+
+ add $ap_real,64,$bp
+ add $ap_real,64,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Z1sqr, in1_z);
+ add %sp,LOCALS+$Z1sqr,$rp
+
+ add $bp_real,0,$bp
+ add %sp,LOCALS+$Z1sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(U2, Z1sqr, in2_x);
+ add %sp,LOCALS+$U2,$rp
+
+ add $ap_real,0,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(H, U2, in1_x);
+ add %sp,LOCALS+$H,$rp
+
+ add $ap_real,64,$bp
+ add %sp,LOCALS+$Z1sqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, Z1sqr, in1_z);
+ add %sp,LOCALS+$S2,$rp
+
+ add $ap_real,64,$bp
+ add %sp,LOCALS+$H,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(res_z, H, in1_z);
+ add %sp,LOCALS+$res_z,$rp
+
+ add $bp_real,32,$bp
+ add %sp,LOCALS+$S2,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, S2, in2_y);
+ add %sp,LOCALS+$S2,$rp
+
+ add $ap_real,32,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(R, S2, in1_y);
+ add %sp,LOCALS+$R,$rp
+
+ add %sp,LOCALS+$H,$bp
+ add %sp,LOCALS+$H,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Hsqr, H);
+ add %sp,LOCALS+$Hsqr,$rp
+
+ add %sp,LOCALS+$R,$bp
+ add %sp,LOCALS+$R,$ap
+ call __ecp_nistz256_mul_mont ! p256_sqr_mont(Rsqr, R);
+ add %sp,LOCALS+$Rsqr,$rp
+
+ add %sp,LOCALS+$H,$bp
+ add %sp,LOCALS+$Hsqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(Hcub, Hsqr, H);
+ add %sp,LOCALS+$Hcub,$rp
+
+ add $ap_real,0,$bp
+ add %sp,LOCALS+$Hsqr,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(U2, in1_x, Hsqr);
+ add %sp,LOCALS+$U2,$rp
+
+ call __ecp_nistz256_mul_by_2 ! p256_mul_by_2(Hsqr, U2);
+ add %sp,LOCALS+$Hsqr,$rp
+
+ add %sp,LOCALS+$Rsqr,$bp
+ call __ecp_nistz256_sub_morf ! p256_sub(res_x, Rsqr, Hsqr);
+ add %sp,LOCALS+$res_x,$rp
+
+ add %sp,LOCALS+$Hcub,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_x, res_x, Hcub);
+ add %sp,LOCALS+$res_x,$rp
+
+ add %sp,LOCALS+$U2,$bp
+ call __ecp_nistz256_sub_morf ! p256_sub(res_y, U2, res_x);
+ add %sp,LOCALS+$res_y,$rp
+
+ add $ap_real,32,$bp
+ add %sp,LOCALS+$Hcub,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(S2, in1_y, Hcub);
+ add %sp,LOCALS+$S2,$rp
+
+ add %sp,LOCALS+$R,$bp
+ add %sp,LOCALS+$res_y,$ap
+ call __ecp_nistz256_mul_mont ! p256_mul_mont(res_y, res_y, R);
+ add %sp,LOCALS+$res_y,$rp
+
+ add %sp,LOCALS+$S2,$bp
+ call __ecp_nistz256_sub_from ! p256_sub(res_y, res_y, S2);
+ add %sp,LOCALS+$res_y,$rp
+
+ ld [%fp+STACK_BIAS-16],$t1 ! !in1infty
+ ld [%fp+STACK_BIAS-12],$t2 ! !in2infty
+ ldx [%fp+STACK_BIAS-8],$rp
+___
+for($i=0;$i<64;$i+=8) { # conditional moves
+$code.=<<___;
+ ld [%sp+LOCALS+$i],@acc[0] ! res
+ ld [%sp+LOCALS+$i+4],@acc[1]
+ ld [$bp_real+$i],@acc[2] ! in2
+ ld [$bp_real+$i+4],@acc[3]
+ ld [$ap_real+$i],@acc[4] ! in1
+ ld [$ap_real+$i+4],@acc[5]
+ movrz $t1,@acc[2],@acc[0]
+ movrz $t1,@acc[3],@acc[1]
+ movrz $t2,@acc[4],@acc[0]
+ movrz $t2,@acc[5],@acc[1]
+ st @acc[0],[$rp+$i]
+ st @acc[1],[$rp+$i+4]
+___
+}
+for(;$i<96;$i+=8) {
+my $j=($i-64)/4;
+$code.=<<___;
+ ld [%sp+LOCALS+$i],@acc[0] ! res
+ ld [%sp+LOCALS+$i+4],@acc[1]
+ ld [$ap_real+$i],@acc[4] ! in1
+ ld [$ap_real+$i+4],@acc[5]
+ movrz $t1,@ONE_mont[$j],@acc[0]
+ movrz $t1,@ONE_mont[$j+1],@acc[1]
+ movrz $t2,@acc[4],@acc[0]
+ movrz $t2,@acc[5],@acc[1]
+ st @acc[0],[$rp+$i]
+ st @acc[1],[$rp+$i+4]
+___
+}
+$code.=<<___;
+ ret
+ restore
+.size ecp_nistz256_point_add_affine,.-ecp_nistz256_point_add_affine
+___
+} }}}
+{{{
+my ($out,$inp,$index)=map("%i$_",(0..2));
+my $mask="%o0";
+
+$code.=<<___;
+! void ecp_nistz256_scatter_w5(void *%i0,const P256_POINT *%i1,
+! int %i2);
+.globl ecp_nistz256_scatter_w5
+.align 32
+ecp_nistz256_scatter_w5:
+ save %sp,-STACK_FRAME,%sp
+
+ sll $index,2,$index
+ add $out,$index,$out
+
+ ld [$inp],%l0 ! X
+ ld [$inp+4],%l1
+ ld [$inp+8],%l2
+ ld [$inp+12],%l3
+ ld [$inp+16],%l4
+ ld [$inp+20],%l5
+ ld [$inp+24],%l6
+ ld [$inp+28],%l7
+ add $inp,32,$inp
+ st %l0,[$out+64*0-4]
+ st %l1,[$out+64*1-4]
+ st %l2,[$out+64*2-4]
+ st %l3,[$out+64*3-4]
+ st %l4,[$out+64*4-4]
+ st %l5,[$out+64*5-4]
+ st %l6,[$out+64*6-4]
+ st %l7,[$out+64*7-4]
+ add $out,64*8,$out
+
+ ld [$inp],%l0 ! Y
+ ld [$inp+4],%l1
+ ld [$inp+8],%l2
+ ld [$inp+12],%l3
+ ld [$inp+16],%l4
+ ld [$inp+20],%l5
+ ld [$inp+24],%l6
+ ld [$inp+28],%l7
+ add $inp,32,$inp
+ st %l0,[$out+64*0-4]
+ st %l1,[$out+64*1-4]
+ st %l2,[$out+64*2-4]
+ st %l3,[$out+64*3-4]
+ st %l4,[$out+64*4-4]
+ st %l5,[$out+64*5-4]
+ st %l6,[$out+64*6-4]
+ st %l7,[$out+64*7-4]
+ add $out,64*8,$out
+
+ ld [$inp],%l0 ! Z
+ ld [$inp+4],%l1
+ ld [$inp+8],%l2
+ ld [$inp+12],%l3
+ ld [$inp+16],%l4
+ ld [$inp+20],%l5
+ ld [$inp+24],%l6
+ ld [$inp+28],%l7
+ st %l0,[$out+64*0-4]
+ st %l1,[$out+64*1-4]
+ st %l2,[$out+64*2-4]
+ st %l3,[$out+64*3-4]
+ st %l4,[$out+64*4-4]
+ st %l5,[$out+64*5-4]
+ st %l6,[$out+64*6-4]
+ st %l7,[$out+64*7-4]
+
+ ret
+ restore
+.size ecp_nistz256_scatter_w5,.-ecp_nistz256_scatter_w5
+
+! void ecp_nistz256_gather_w5(P256_POINT *%i0,const void *%i1,
+! int %i2);
+.globl ecp_nistz256_gather_w5
+.align 32
+ecp_nistz256_gather_w5:
+ save %sp,-STACK_FRAME,%sp
+
+ neg $index,$mask
+ srax $mask,63,$mask
+
+ add $index,$mask,$index
+ sll $index,2,$index
+ add $inp,$index,$inp
+
+ ld [$inp+64*0],%l0
+ ld [$inp+64*1],%l1
+ ld [$inp+64*2],%l2
+ ld [$inp+64*3],%l3
+ ld [$inp+64*4],%l4
+ ld [$inp+64*5],%l5
+ ld [$inp+64*6],%l6
+ ld [$inp+64*7],%l7
+ add $inp,64*8,$inp
+ and %l0,$mask,%l0
+ and %l1,$mask,%l1
+ st %l0,[$out] ! X
+ and %l2,$mask,%l2
+ st %l1,[$out+4]
+ and %l3,$mask,%l3
+ st %l2,[$out+8]
+ and %l4,$mask,%l4
+ st %l3,[$out+12]
+ and %l5,$mask,%l5
+ st %l4,[$out+16]
+ and %l6,$mask,%l6
+ st %l5,[$out+20]
+ and %l7,$mask,%l7
+ st %l6,[$out+24]
+ st %l7,[$out+28]
+ add $out,32,$out
+
+ ld [$inp+64*0],%l0
+ ld [$inp+64*1],%l1
+ ld [$inp+64*2],%l2
+ ld [$inp+64*3],%l3
+ ld [$inp+64*4],%l4
+ ld [$inp+64*5],%l5
+ ld [$inp+64*6],%l6
+ ld [$inp+64*7],%l7
+ add $inp,64*8,$inp
+ and %l0,$mask,%l0
+ and %l1,$mask,%l1
+ st %l0,[$out] ! Y
+ and %l2,$mask,%l2
+ st %l1,[$out+4]
+ and %l3,$mask,%l3
+ st %l2,[$out+8]
+ and %l4,$mask,%l4
+ st %l3,[$out+12]
+ and %l5,$mask,%l5
+ st %l4,[$out+16]
+ and %l6,$mask,%l6
+ st %l5,[$out+20]
+ and %l7,$mask,%l7
+ st %l6,[$out+24]
+ st %l7,[$out+28]
+ add $out,32,$out
+
+ ld [$inp+64*0],%l0
+ ld [$inp+64*1],%l1
+ ld [$inp+64*2],%l2
+ ld [$inp+64*3],%l3
+ ld [$inp+64*4],%l4
+ ld [$inp+64*5],%l5
+ ld [$inp+64*6],%l6
+ ld [$inp+64*7],%l7
+ and %l0,$mask,%l0
+ and %l1,$mask,%l1
+ st %l0,[$out] ! Z
+ and %l2,$mask,%l2
+ st %l1,[$out+4]
+ and %l3,$mask,%l3
+ st %l2,[$out+8]
+ and %l4,$mask,%l4
+ st %l3,[$out+12]
+ and %l5,$mask,%l5
+ st %l4,[$out+16]
+ and %l6,$mask,%l6
+ st %l5,[$out+20]
+ and %l7,$mask,%l7
+ st %l6,[$out+24]
+ st %l7,[$out+28]
+
+ ret
+ restore
+.size ecp_nistz256_gather_w5,.-ecp_nistz256_gather_w5
+
+! void ecp_nistz256_scatter_w7(void *%i0,const P256_POINT_AFFINE *%i1,
+! int %i2);
+.globl ecp_nistz256_scatter_w7
+.align 32
+ecp_nistz256_scatter_w7:
+ save %sp,-STACK_FRAME,%sp
+ nop
+ add $out,$index,$out
+ mov 64/4,$index
+.Loop_scatter_w7:
+ ld [$inp],%l0
+ add $inp,4,$inp
+ subcc $index,1,$index
+ stb %l0,[$out+64*0-1]
+ srl %l0,8,%l1
+ stb %l1,[$out+64*1-1]
+ srl %l0,16,%l2
+ stb %l2,[$out+64*2-1]
+ srl %l0,24,%l3
+ stb %l3,[$out+64*3-1]
+ bne .Loop_scatter_w7
+ add $out,64*4,$out
+
+ ret
+ restore
+.size ecp_nistz256_scatter_w7,.-ecp_nistz256_scatter_w7
+
+! void ecp_nistz256_gather_w7(P256_POINT_AFFINE *%i0,const void *%i1,
+! int %i2);
+.globl ecp_nistz256_gather_w7
+.align 32
+ecp_nistz256_gather_w7:
+ save %sp,-STACK_FRAME,%sp
+
+ neg $index,$mask
+ srax $mask,63,$mask
+
+ add $index,$mask,$index
+ add $inp,$index,$inp
+ mov 64/4,$index
+
+.Loop_gather_w7:
+ ldub [$inp+64*0],%l0
+ prefetch [$inp+3840+64*0],1
+ subcc $index,1,$index
+ ldub [$inp+64*1],%l1
+ prefetch [$inp+3840+64*1],1
+ ldub [$inp+64*2],%l2
+ prefetch [$inp+3840+64*2],1
+ ldub [$inp+64*3],%l3
+ prefetch [$inp+3840+64*3],1
+ add $inp,64*4,$inp
+ sll %l1,8,%l1
+ sll %l2,16,%l2
+ or %l0,%l1,%l0
+ sll %l3,24,%l3
+ or %l0,%l2,%l0
+ or %l0,%l3,%l0
+ and %l0,$mask,%l0
+ st %l0,[$out]
+ bne .Loop_gather_w7
+ add $out,4,$out
+
+ ret
+ restore
+.size ecp_nistz256_gather_w7,.-ecp_nistz256_gather_w7
+___
+}}}
+{{{
+########################################################################
+# Following subroutines are VIS3 counterparts of those above that
+# implement ones found in ecp_nistz256.c. Key difference is that they
+# use 128-bit muliplication and addition with 64-bit carry, and in order
+# to do that they perform conversion from uin32_t[8] to uint64_t[4] upon
+# entry and vice versa on return.
+#
+my ($rp,$ap,$bp)=map("%i$_",(0..2));
+my ($t0,$t1,$t2,$t3,$a0,$a1,$a2,$a3)=map("%l$_",(0..7));
+my ($acc0,$acc1,$acc2,$acc3,$acc4,$acc5)=map("%o$_",(0..5));
+my ($bi,$poly1,$poly3,$minus1)=(map("%i$_",(3..5)),"%g1");
+my ($rp_real,$ap_real)=("%g2","%g3");
+my ($acc6,$acc7)=($bp,$bi); # used in squaring
+
+$code.=<<___;
+.align 32
+__ecp_nistz256_mul_by_2_vis3:
+ addcc $acc0,$acc0,$acc0
+ addxccc $acc1,$acc1,$acc1
+ addxccc $acc2,$acc2,$acc2
+ addxccc $acc3,$acc3,$acc3
+ b .Lreduce_by_sub_vis3
+ addxc %g0,%g0,$acc4 ! did it carry?
+.size __ecp_nistz256_mul_by_2_vis3,.-__ecp_nistz256_mul_by_2_vis3
+
+.align 32
+__ecp_nistz256_add_vis3:
+ ldx [$bp+0],$t0
+ ldx [$bp+8],$t1
+ ldx [$bp+16],$t2
+ ldx [$bp+24],$t3
+
+__ecp_nistz256_add_noload_vis3:
+
+ addcc $t0,$acc0,$acc0
+ addxccc $t1,$acc1,$acc1
+ addxccc $t2,$acc2,$acc2
+ addxccc $t3,$acc3,$acc3
+ addxc %g0,%g0,$acc4 ! did it carry?
+
+.Lreduce_by_sub_vis3:
+
+ addcc $acc0,1,$t0 ! add -modulus, i.e. subtract
+ addxccc $acc1,$poly1,$t1
+ addxccc $acc2,$minus1,$t2
+ addxc $acc3,$poly3,$t3
+
+ movrnz $acc4,$t0,$acc0 ! if a+b carried, ret = ret-mod
+ movrnz $acc4,$t1,$acc1
+ stx $acc0,[$rp]
+ movrnz $acc4,$t2,$acc2
+ stx $acc1,[$rp+8]
+ movrnz $acc4,$t3,$acc3
+ stx $acc2,[$rp+16]
+ retl
+ stx $acc3,[$rp+24]
+.size __ecp_nistz256_add_vis3,.-__ecp_nistz256_add_vis3
+
+! Trouble with subtraction is that there is no subtraction with 64-bit
+! borrow, only with 32-bit one. For this reason we "decompose" 64-bit
+! $acc0-$acc3 to 32-bit values and pick b[4] in 32-bit pieces. But
+! recall that SPARC is big-endian, which is why you'll observe that
+! b[4] is accessed as 4-0-12-8-20-16-28-24. And prior reduction we
+! "collect" result back to 64-bit $acc0-$acc3.
+.align 32
+__ecp_nistz256_sub_from_vis3:
+ ld [$bp+4],$t0
+ ld [$bp+0],$t1
+ ld [$bp+12],$t2
+ ld [$bp+8],$t3
+
+ srlx $acc0,32,$acc4
+ not $poly1,$poly1
+ srlx $acc1,32,$acc5
+ subcc $acc0,$t0,$acc0
+ ld [$bp+20],$t0
+ subccc $acc4,$t1,$acc4
+ ld [$bp+16],$t1
+ subccc $acc1,$t2,$acc1
+ ld [$bp+28],$t2
+ and $acc0,$poly1,$acc0
+ subccc $acc5,$t3,$acc5
+ ld [$bp+24],$t3
+ sllx $acc4,32,$acc4
+ and $acc1,$poly1,$acc1
+ sllx $acc5,32,$acc5
+ or $acc0,$acc4,$acc0
+ srlx $acc2,32,$acc4
+ or $acc1,$acc5,$acc1
+ srlx $acc3,32,$acc5
+ subccc $acc2,$t0,$acc2
+ subccc $acc4,$t1,$acc4
+ subccc $acc3,$t2,$acc3
+ and $acc2,$poly1,$acc2
+ subccc $acc5,$t3,$acc5
+ sllx $acc4,32,$acc4
+ and $acc3,$poly1,$acc3
+ sllx $acc5,32,$acc5
+ or $acc2,$acc4,$acc2
+ subc %g0,%g0,$acc4 ! did it borrow?
+ b .Lreduce_by_add_vis3
+ or $acc3,$acc5,$acc3
+.size __ecp_nistz256_sub_from_vis3,.-__ecp_nistz256_sub_from_vis3
+
+.align 32
+__ecp_nistz256_sub_morf_vis3:
+ ld [$bp+4],$t0
+ ld [$bp+0],$t1
+ ld [$bp+12],$t2
+ ld [$bp+8],$t3
+
+ srlx $acc0,32,$acc4
+ not $poly1,$poly1
+ srlx $acc1,32,$acc5
+ subcc $t0,$acc0,$acc0
+ ld [$bp+20],$t0
+ subccc $t1,$acc4,$acc4
+ ld [$bp+16],$t1
+ subccc $t2,$acc1,$acc1
+ ld [$bp+28],$t2
+ and $acc0,$poly1,$acc0
+ subccc $t3,$acc5,$acc5
+ ld [$bp+24],$t3
+ sllx $acc4,32,$acc4
+ and $acc1,$poly1,$acc1
+ sllx $acc5,32,$acc5
+ or $acc0,$acc4,$acc0
+ srlx $acc2,32,$acc4
+ or $acc1,$acc5,$acc1
+ srlx $acc3,32,$acc5
+ subccc $t0,$acc2,$acc2
+ subccc $t1,$acc4,$acc4
+ subccc $t2,$acc3,$acc3
+ and $acc2,$poly1,$acc2
+ subccc $t3,$acc5,$acc5
+ sllx $acc4,32,$acc4
+ and $acc3,$poly1,$acc3
+ sllx $acc5,32,$acc5
+ or $acc2,$acc4,$acc2
+ subc %g0,%g0,$acc4 ! did it borrow?
+ or $acc3,$acc5,$acc3
+
+.Lreduce_by_add_vis3:
+
+ addcc $acc0,-1,$t0 ! add modulus
+ not $poly3,$t3
+ addxccc $acc1,$poly1,$t1
+ not $poly1,$poly1 ! restore $poly1
+ addxccc $acc2,%g0,$t2
+ addxc $acc3,$t3,$t3
+
+ movrnz $acc4,$t0,$acc0 ! if a-b borrowed, ret = ret+mod
+ movrnz $acc4,$t1,$acc1
+ stx $acc0,[$rp]
+ movrnz $acc4,$t2,$acc2
+ stx $acc1,[$rp+8]
+ movrnz $acc4,$t3,$acc3
+ stx $acc2,[$rp+16]
+ retl
+ stx $acc3,[$rp+24]
+.size __ecp_nistz256_sub_morf_vis3,.-__ecp_nistz256_sub_morf_vis3
+
+.align 32
+__ecp_nistz256_div_by_2_vis3:
+ ! ret = (a is odd ? a+mod : a) >> 1
+
+ not $poly1,$t1
+ not $poly3,$t3
+ and $acc0,1,$acc5
+ addcc $acc0,-1,$t0 ! add modulus
+ addxccc $acc1,$t1,$t1
+ addxccc $acc2,%g0,$t2
+ addxccc $acc3,$t3,$t3
+ addxc %g0,%g0,$acc4 ! carry bit
+
+ movrnz $acc5,$t0,$acc0
+ movrnz $acc5,$t1,$acc1
+ movrnz $acc5,$t2,$acc2
+ movrnz $acc5,$t3,$acc3
+ movrz $acc5,%g0,$acc4
+
+ ! ret >>= 1
+
+ srlx $acc0,1,$acc0
+ sllx $acc1,63,$t0
+ srlx $acc1,1,$acc1
+ or $acc0,$t0,$acc0
+ sllx $acc2,63,$t1
+ srlx $acc2,1,$acc2
+ or $acc1,$t1,$acc1
+ sllx $acc3,63,$t2
+ stx $acc0,[$rp]
+ srlx $acc3,1,$acc3
+ or $acc2,$t2,$acc2
+ sllx $acc4,63,$t3 ! don't forget carry bit
+ stx $acc1,[$rp+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[$rp+16]
+ retl
+ stx $acc3,[$rp+24]
+.size __ecp_nistz256_div_by_2_vis3,.-__ecp_nistz256_div_by_2_vis3
+
+! compared to __ecp_nistz256_mul_mont it's almost 4x smaller and
+! 4x faster [on T4]...
+.align 32
+__ecp_nistz256_mul_mont_vis3:
+ mulx $a0,$bi,$acc0
+ not $poly3,$poly3 ! 0xFFFFFFFF00000001
+ umulxhi $a0,$bi,$t0
+ mulx $a1,$bi,$acc1
+ umulxhi $a1,$bi,$t1
+ mulx $a2,$bi,$acc2
+ umulxhi $a2,$bi,$t2
+ mulx $a3,$bi,$acc3
+ umulxhi $a3,$bi,$t3
+ ldx [$bp+8],$bi ! b[1]
+
+ addcc $acc1,$t0,$acc1 ! accumulate high parts of multiplication
+ sllx $acc0,32,$t0
+ addxccc $acc2,$t1,$acc2
+ srlx $acc0,32,$t1
+ addxccc $acc3,$t2,$acc3
+ addxc %g0,$t3,$acc4
+ mov 0,$acc5
+___
+for($i=1;$i<4;$i++) {
+ # Reduction iteration is normally performed by accumulating
+ # result of multiplication of modulus by "magic" digit [and
+ # omitting least significant word, which is guaranteed to
+ # be 0], but thanks to special form of modulus and "magic"
+ # digit being equal to least significant word, it can be
+ # performed with additions and subtractions alone. Indeed:
+ #
+ # ffff0001.00000000.0000ffff.ffffffff
+ # * abcdefgh
+ # + xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.abcdefgh
+ #
+ # Now observing that ff..ff*x = (2^n-1)*x = 2^n*x-x, we
+ # rewrite above as:
+ #
+ # xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.abcdefgh
+ # + abcdefgh.abcdefgh.0000abcd.efgh0000.00000000
+ # - 0000abcd.efgh0000.00000000.00000000.abcdefgh
+ #
+ # or marking redundant operations:
+ #
+ # xxxxxxxx.xxxxxxxx.xxxxxxxx.xxxxxxxx.--------
+ # + abcdefgh.abcdefgh.0000abcd.efgh0000.--------
+ # - 0000abcd.efgh0000.--------.--------.--------
+ # ^^^^^^^^ but this word is calculated with umulxhi, because
+ # there is no subtract with 64-bit borrow:-(
+
+$code.=<<___;
+ sub $acc0,$t0,$t2 ! acc0*0xFFFFFFFF00000001, low part
+ umulxhi $acc0,$poly3,$t3 ! acc0*0xFFFFFFFF00000001, high part
+ addcc $acc1,$t0,$acc0 ! +=acc[0]<<96 and omit acc[0]
+ mulx $a0,$bi,$t0
+ addxccc $acc2,$t1,$acc1
+ mulx $a1,$bi,$t1
+ addxccc $acc3,$t2,$acc2 ! +=acc[0]*0xFFFFFFFF00000001
+ mulx $a2,$bi,$t2
+ addxccc $acc4,$t3,$acc3
+ mulx $a3,$bi,$t3
+ addxc $acc5,%g0,$acc4
+
+ addcc $acc0,$t0,$acc0 ! accumulate low parts of multiplication
+ umulxhi $a0,$bi,$t0
+ addxccc $acc1,$t1,$acc1
+ umulxhi $a1,$bi,$t1
+ addxccc $acc2,$t2,$acc2
+ umulxhi $a2,$bi,$t2
+ addxccc $acc3,$t3,$acc3
+ umulxhi $a3,$bi,$t3
+ addxc $acc4,%g0,$acc4
+___
+$code.=<<___ if ($i<3);
+ ldx [$bp+8*($i+1)],$bi ! bp[$i+1]
+___
+$code.=<<___;
+ addcc $acc1,$t0,$acc1 ! accumulate high parts of multiplication
+ sllx $acc0,32,$t0
+ addxccc $acc2,$t1,$acc2
+ srlx $acc0,32,$t1
+ addxccc $acc3,$t2,$acc3
+ addxccc $acc4,$t3,$acc4
+ addxc %g0,%g0,$acc5
+___
+}
+$code.=<<___;
+ sub $acc0,$t0,$t2 ! acc0*0xFFFFFFFF00000001, low part
+ umulxhi $acc0,$poly3,$t3 ! acc0*0xFFFFFFFF00000001, high part
+ addcc $acc1,$t0,$acc0 ! +=acc[0]<<96 and omit acc[0]
+ addxccc $acc2,$t1,$acc1
+ addxccc $acc3,$t2,$acc2 ! +=acc[0]*0xFFFFFFFF00000001
+ addxccc $acc4,$t3,$acc3
+ b .Lmul_final_vis3 ! see below
+ addxc $acc5,%g0,$acc4
+.size __ecp_nistz256_mul_mont_vis3,.-__ecp_nistz256_mul_mont_vis3
+
+! compared to above __ecp_nistz256_mul_mont_vis3 it's 21% less
+! instructions, but only 14% faster [on T4]...
+.align 32
+__ecp_nistz256_sqr_mont_vis3:
+ ! | | | | | |a1*a0| |
+ ! | | | | |a2*a0| | |
+ ! | |a3*a2|a3*a0| | | |
+ ! | | | |a2*a1| | | |
+ ! | | |a3*a1| | | | |
+ ! *| | | | | | | | 2|
+ ! +|a3*a3|a2*a2|a1*a1|a0*a0|
+ ! |--+--+--+--+--+--+--+--|
+ ! |A7|A6|A5|A4|A3|A2|A1|A0|, where Ax is $accx, i.e. follow $accx
+ !
+ ! "can't overflow" below mark carrying into high part of
+ ! multiplication result, which can't overflow, because it
+ ! can never be all ones.
+
+ mulx $a1,$a0,$acc1 ! a[1]*a[0]
+ umulxhi $a1,$a0,$t1
+ mulx $a2,$a0,$acc2 ! a[2]*a[0]
+ umulxhi $a2,$a0,$t2
+ mulx $a3,$a0,$acc3 ! a[3]*a[0]
+ umulxhi $a3,$a0,$acc4
+
+ addcc $acc2,$t1,$acc2 ! accumulate high parts of multiplication
+ mulx $a2,$a1,$t0 ! a[2]*a[1]
+ umulxhi $a2,$a1,$t1
+ addxccc $acc3,$t2,$acc3
+ mulx $a3,$a1,$t2 ! a[3]*a[1]
+ umulxhi $a3,$a1,$t3
+ addxc $acc4,%g0,$acc4 ! can't overflow
+
+ mulx $a3,$a2,$acc5 ! a[3]*a[2]
+ not $poly3,$poly3 ! 0xFFFFFFFF00000001
+ umulxhi $a3,$a2,$acc6
+
+ addcc $t2,$t1,$t1 ! accumulate high parts of multiplication
+ mulx $a0,$a0,$acc0 ! a[0]*a[0]
+ addxc $t3,%g0,$t2 ! can't overflow
+
+ addcc $acc3,$t0,$acc3 ! accumulate low parts of multiplication
+ umulxhi $a0,$a0,$a0
+ addxccc $acc4,$t1,$acc4
+ mulx $a1,$a1,$t1 ! a[1]*a[1]
+ addxccc $acc5,$t2,$acc5
+ umulxhi $a1,$a1,$a1
+ addxc $acc6,%g0,$acc6 ! can't overflow
+
+ addcc $acc1,$acc1,$acc1 ! acc[1-6]*=2
+ mulx $a2,$a2,$t2 ! a[2]*a[2]
+ addxccc $acc2,$acc2,$acc2
+ umulxhi $a2,$a2,$a2
+ addxccc $acc3,$acc3,$acc3
+ mulx $a3,$a3,$t3 ! a[3]*a[3]
+ addxccc $acc4,$acc4,$acc4
+ umulxhi $a3,$a3,$a3
+ addxccc $acc5,$acc5,$acc5
+ addxccc $acc6,$acc6,$acc6
+ addxc %g0,%g0,$acc7
+
+ addcc $acc1,$a0,$acc1 ! +a[i]*a[i]
+ addxccc $acc2,$t1,$acc2
+ addxccc $acc3,$a1,$acc3
+ addxccc $acc4,$t2,$acc4
+ sllx $acc0,32,$t0
+ addxccc $acc5,$a2,$acc5
+ srlx $acc0,32,$t1
+ addxccc $acc6,$t3,$acc6
+ sub $acc0,$t0,$t2 ! acc0*0xFFFFFFFF00000001, low part
+ addxc $acc7,$a3,$acc7
+___
+for($i=0;$i<3;$i++) { # reductions, see commentary
+ # in multiplication for details
+$code.=<<___;
+ umulxhi $acc0,$poly3,$t3 ! acc0*0xFFFFFFFF00000001, high part
+ addcc $acc1,$t0,$acc0 ! +=acc[0]<<96 and omit acc[0]
+ sllx $acc0,32,$t0
+ addxccc $acc2,$t1,$acc1
+ srlx $acc0,32,$t1
+ addxccc $acc3,$t2,$acc2 ! +=acc[0]*0xFFFFFFFF00000001
+ sub $acc0,$t0,$t2 ! acc0*0xFFFFFFFF00000001, low part
+ addxc %g0,$t3,$acc3 ! cant't overflow
+___
+}
+$code.=<<___;
+ umulxhi $acc0,$poly3,$t3 ! acc0*0xFFFFFFFF00000001, high part
+ addcc $acc1,$t0,$acc0 ! +=acc[0]<<96 and omit acc[0]
+ addxccc $acc2,$t1,$acc1
+ addxccc $acc3,$t2,$acc2 ! +=acc[0]*0xFFFFFFFF00000001
+ addxc %g0,$t3,$acc3 ! can't overflow
+
+ addcc $acc0,$acc4,$acc0 ! accumulate upper half
+ addxccc $acc1,$acc5,$acc1
+ addxccc $acc2,$acc6,$acc2
+ addxccc $acc3,$acc7,$acc3
+ addxc %g0,%g0,$acc4
+
+.Lmul_final_vis3:
+
+ ! Final step is "if result > mod, subtract mod", but as comparison
+ ! means subtraction, we do the subtraction and then copy outcome
+ ! if it didn't borrow. But note that as we [have to] replace
+ ! subtraction with addition with negative, carry/borrow logic is
+ ! inverse.
+
+ addcc $acc0,1,$t0 ! add -modulus, i.e. subtract
+ not $poly3,$poly3 ! restore 0x00000000FFFFFFFE
+ addxccc $acc1,$poly1,$t1
+ addxccc $acc2,$minus1,$t2
+ addxccc $acc3,$poly3,$t3
+ addxccc $acc4,$minus1,%g0 ! did it carry?
+
+ movcs %xcc,$t0,$acc0
+ movcs %xcc,$t1,$acc1
+ stx $acc0,[$rp]
+ movcs %xcc,$t2,$acc2
+ stx $acc1,[$rp+8]
+ movcs %xcc,$t3,$acc3
+ stx $acc2,[$rp+16]
+ retl
+ stx $acc3,[$rp+24]
+.size __ecp_nistz256_sqr_mont_vis3,.-__ecp_nistz256_sqr_mont_vis3
+___
+
+########################################################################
+# void ecp_nistz256_point_double(P256_POINT *out,const P256_POINT *inp);
+#
+{
+my ($res_x,$res_y,$res_z,
+ $in_x,$in_y,$in_z,
+ $S,$M,$Zsqr,$tmp0)=map(32*$_,(0..9));
+# above map() describes stack layout with 10 temporary
+# 256-bit vectors on top.
+
+$code.=<<___;
+.align 32
+ecp_nistz256_point_double_vis3:
+ save %sp,-STACK64_FRAME-32*10,%sp
+
+ mov $rp,$rp_real
+ mov -1,$minus1
+ mov -2,$poly3
+ sllx $minus1,32,$poly1 ! 0xFFFFFFFF00000000
+ srl $poly3,0,$poly3 ! 0x00000000FFFFFFFE
+
+ ! convert input to uint64_t[4]
+ ld [$ap],$a0 ! in_x
+ ld [$ap+4],$t0
+ ld [$ap+8],$a1
+ ld [$ap+12],$t1
+ ld [$ap+16],$a2
+ ld [$ap+20],$t2
+ ld [$ap+24],$a3
+ ld [$ap+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ ld [$ap+32],$acc0 ! in_y
+ or $a0,$t0,$a0
+ ld [$ap+32+4],$t0
+ sllx $t2,32,$t2
+ ld [$ap+32+8],$acc1
+ or $a1,$t1,$a1
+ ld [$ap+32+12],$t1
+ sllx $t3,32,$t3
+ ld [$ap+32+16],$acc2
+ or $a2,$t2,$a2
+ ld [$ap+32+20],$t2
+ or $a3,$t3,$a3
+ ld [$ap+32+24],$acc3
+ sllx $t0,32,$t0
+ ld [$ap+32+28],$t3
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in_x]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in_x+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in_x+16]
+ or $acc0,$t0,$acc0
+ stx $a3,[%sp+LOCALS64+$in_x+24]
+ or $acc1,$t1,$acc1
+ stx $acc0,[%sp+LOCALS64+$in_y]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in_y+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in_y+16]
+ stx $acc3,[%sp+LOCALS64+$in_y+24]
+
+ ld [$ap+64],$a0 ! in_z
+ ld [$ap+64+4],$t0
+ ld [$ap+64+8],$a1
+ ld [$ap+64+12],$t1
+ ld [$ap+64+16],$a2
+ ld [$ap+64+20],$t2
+ ld [$ap+64+24],$a3
+ ld [$ap+64+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ or $a0,$t0,$a0
+ sllx $t2,32,$t2
+ or $a1,$t1,$a1
+ sllx $t3,32,$t3
+ or $a2,$t2,$a2
+ or $a3,$t3,$a3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in_z]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in_z+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in_z+16]
+ stx $a3,[%sp+LOCALS64+$in_z+24]
+
+ ! in_y is still in $acc0-$acc3
+ call __ecp_nistz256_mul_by_2_vis3 ! p256_mul_by_2(S, in_y);
+ add %sp,LOCALS64+$S,$rp
+
+ ! in_z is still in $a0-$a3
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Zsqr, in_z);
+ add %sp,LOCALS64+$Zsqr,$rp
+
+ mov $acc0,$a0 ! put Zsqr aside
+ mov $acc1,$a1
+ mov $acc2,$a2
+ mov $acc3,$a3
+
+ add %sp,LOCALS64+$in_x,$bp
+ call __ecp_nistz256_add_vis3 ! p256_add(M, Zsqr, in_x);
+ add %sp,LOCALS64+$M,$rp
+
+ mov $a0,$acc0 ! restore Zsqr
+ ldx [%sp+LOCALS64+$S],$a0 ! forward load
+ mov $a1,$acc1
+ ldx [%sp+LOCALS64+$S+8],$a1
+ mov $a2,$acc2
+ ldx [%sp+LOCALS64+$S+16],$a2
+ mov $a3,$acc3
+ ldx [%sp+LOCALS64+$S+24],$a3
+
+ add %sp,LOCALS64+$in_x,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(Zsqr, in_x, Zsqr);
+ add %sp,LOCALS64+$Zsqr,$rp
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(S, S);
+ add %sp,LOCALS64+$S,$rp
+
+ ldx [%sp+LOCALS64+$in_z],$bi
+ ldx [%sp+LOCALS64+$in_y],$a0
+ ldx [%sp+LOCALS64+$in_y+8],$a1
+ ldx [%sp+LOCALS64+$in_y+16],$a2
+ ldx [%sp+LOCALS64+$in_y+24],$a3
+ add %sp,LOCALS64+$in_z,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(tmp0, in_z, in_y);
+ add %sp,LOCALS64+$tmp0,$rp
+
+ ldx [%sp+LOCALS64+$M],$bi ! forward load
+ ldx [%sp+LOCALS64+$Zsqr],$a0
+ ldx [%sp+LOCALS64+$Zsqr+8],$a1
+ ldx [%sp+LOCALS64+$Zsqr+16],$a2
+ ldx [%sp+LOCALS64+$Zsqr+24],$a3
+
+ call __ecp_nistz256_mul_by_2_vis3 ! p256_mul_by_2(res_z, tmp0);
+ add %sp,LOCALS64+$res_z,$rp
+
+ add %sp,LOCALS64+$M,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(M, M, Zsqr);
+ add %sp,LOCALS64+$M,$rp
+
+ mov $acc0,$a0 ! put aside M
+ mov $acc1,$a1
+ mov $acc2,$a2
+ mov $acc3,$a3
+ call __ecp_nistz256_mul_by_2_vis3
+ add %sp,LOCALS64+$M,$rp
+ mov $a0,$t0 ! copy M
+ ldx [%sp+LOCALS64+$S],$a0 ! forward load
+ mov $a1,$t1
+ ldx [%sp+LOCALS64+$S+8],$a1
+ mov $a2,$t2
+ ldx [%sp+LOCALS64+$S+16],$a2
+ mov $a3,$t3
+ ldx [%sp+LOCALS64+$S+24],$a3
+ call __ecp_nistz256_add_noload_vis3 ! p256_mul_by_3(M, M);
+ add %sp,LOCALS64+$M,$rp
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(tmp0, S);
+ add %sp,LOCALS64+$tmp0,$rp
+
+ ldx [%sp+LOCALS64+$S],$bi ! forward load
+ ldx [%sp+LOCALS64+$in_x],$a0
+ ldx [%sp+LOCALS64+$in_x+8],$a1
+ ldx [%sp+LOCALS64+$in_x+16],$a2
+ ldx [%sp+LOCALS64+$in_x+24],$a3
+
+ call __ecp_nistz256_div_by_2_vis3 ! p256_div_by_2(res_y, tmp0);
+ add %sp,LOCALS64+$res_y,$rp
+
+ add %sp,LOCALS64+$S,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S, S, in_x);
+ add %sp,LOCALS64+$S,$rp
+
+ ldx [%sp+LOCALS64+$M],$a0 ! forward load
+ ldx [%sp+LOCALS64+$M+8],$a1
+ ldx [%sp+LOCALS64+$M+16],$a2
+ ldx [%sp+LOCALS64+$M+24],$a3
+
+ call __ecp_nistz256_mul_by_2_vis3 ! p256_mul_by_2(tmp0, S);
+ add %sp,LOCALS64+$tmp0,$rp
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(res_x, M);
+ add %sp,LOCALS64+$res_x,$rp
+
+ add %sp,LOCALS64+$tmp0,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_x, res_x, tmp0);
+ add %sp,LOCALS64+$res_x,$rp
+
+ ldx [%sp+LOCALS64+$M],$a0 ! forward load
+ ldx [%sp+LOCALS64+$M+8],$a1
+ ldx [%sp+LOCALS64+$M+16],$a2
+ ldx [%sp+LOCALS64+$M+24],$a3
+
+ add %sp,LOCALS64+$S,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(S, S, res_x);
+ add %sp,LOCALS64+$S,$rp
+
+ mov $acc0,$bi
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S, S, M);
+ add %sp,LOCALS64+$S,$rp
+
+ ldx [%sp+LOCALS64+$res_x],$a0 ! forward load
+ ldx [%sp+LOCALS64+$res_x+8],$a1
+ ldx [%sp+LOCALS64+$res_x+16],$a2
+ ldx [%sp+LOCALS64+$res_x+24],$a3
+
+ add %sp,LOCALS64+$res_y,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_y, S, res_y);
+ add %sp,LOCALS64+$res_y,$bp
+
+ ! convert output to uint_32[8]
+ srlx $a0,32,$t0
+ srlx $a1,32,$t1
+ st $a0,[$rp_real] ! res_x
+ srlx $a2,32,$t2
+ st $t0,[$rp_real+4]
+ srlx $a3,32,$t3
+ st $a1,[$rp_real+8]
+ st $t1,[$rp_real+12]
+ st $a2,[$rp_real+16]
+ st $t2,[$rp_real+20]
+ st $a3,[$rp_real+24]
+ st $t3,[$rp_real+28]
+
+ ldx [%sp+LOCALS64+$res_z],$a0 ! forward load
+ srlx $acc0,32,$t0
+ ldx [%sp+LOCALS64+$res_z+8],$a1
+ srlx $acc1,32,$t1
+ ldx [%sp+LOCALS64+$res_z+16],$a2
+ srlx $acc2,32,$t2
+ ldx [%sp+LOCALS64+$res_z+24],$a3
+ srlx $acc3,32,$t3
+ st $acc0,[$rp_real+32] ! res_y
+ st $t0, [$rp_real+32+4]
+ st $acc1,[$rp_real+32+8]
+ st $t1, [$rp_real+32+12]
+ st $acc2,[$rp_real+32+16]
+ st $t2, [$rp_real+32+20]
+ st $acc3,[$rp_real+32+24]
+ st $t3, [$rp_real+32+28]
+
+ srlx $a0,32,$t0
+ srlx $a1,32,$t1
+ st $a0,[$rp_real+64] ! res_z
+ srlx $a2,32,$t2
+ st $t0,[$rp_real+64+4]
+ srlx $a3,32,$t3
+ st $a1,[$rp_real+64+8]
+ st $t1,[$rp_real+64+12]
+ st $a2,[$rp_real+64+16]
+ st $t2,[$rp_real+64+20]
+ st $a3,[$rp_real+64+24]
+ st $t3,[$rp_real+64+28]
+
+ ret
+ restore
+.size ecp_nistz256_point_double_vis3,.-ecp_nistz256_point_double_vis3
+___
+}
+########################################################################
+# void ecp_nistz256_point_add(P256_POINT *out,const P256_POINT *in1,
+# const P256_POINT *in2);
+{
+my ($res_x,$res_y,$res_z,
+ $in1_x,$in1_y,$in1_z,
+ $in2_x,$in2_y,$in2_z,
+ $H,$Hsqr,$R,$Rsqr,$Hcub,
+ $U1,$U2,$S1,$S2)=map(32*$_,(0..17));
+my ($Z1sqr, $Z2sqr) = ($Hsqr, $Rsqr);
+
+# above map() describes stack layout with 18 temporary
+# 256-bit vectors on top. Then we reserve some space for
+# !in1infty, !in2infty and result of check for zero.
+
+$code.=<<___;
+.globl ecp_nistz256_point_add_vis3
+.align 32
+ecp_nistz256_point_add_vis3:
+ save %sp,-STACK64_FRAME-32*18-32,%sp
+
+ mov $rp,$rp_real
+ mov -1,$minus1
+ mov -2,$poly3
+ sllx $minus1,32,$poly1 ! 0xFFFFFFFF00000000
+ srl $poly3,0,$poly3 ! 0x00000000FFFFFFFE
+
+ ! convert input to uint64_t[4]
+ ld [$bp],$a0 ! in2_x
+ ld [$bp+4],$t0
+ ld [$bp+8],$a1
+ ld [$bp+12],$t1
+ ld [$bp+16],$a2
+ ld [$bp+20],$t2
+ ld [$bp+24],$a3
+ ld [$bp+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ ld [$bp+32],$acc0 ! in2_y
+ or $a0,$t0,$a0
+ ld [$bp+32+4],$t0
+ sllx $t2,32,$t2
+ ld [$bp+32+8],$acc1
+ or $a1,$t1,$a1
+ ld [$bp+32+12],$t1
+ sllx $t3,32,$t3
+ ld [$bp+32+16],$acc2
+ or $a2,$t2,$a2
+ ld [$bp+32+20],$t2
+ or $a3,$t3,$a3
+ ld [$bp+32+24],$acc3
+ sllx $t0,32,$t0
+ ld [$bp+32+28],$t3
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in2_x]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in2_x+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in2_x+16]
+ or $acc0,$t0,$acc0
+ stx $a3,[%sp+LOCALS64+$in2_x+24]
+ or $acc1,$t1,$acc1
+ stx $acc0,[%sp+LOCALS64+$in2_y]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in2_y+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in2_y+16]
+ stx $acc3,[%sp+LOCALS64+$in2_y+24]
+
+ or $a1,$a0,$a0
+ or $a3,$a2,$a2
+ or $acc1,$acc0,$acc0
+ or $acc3,$acc2,$acc2
+ or $a2,$a0,$a0
+ or $acc2,$acc0,$acc0
+ or $acc0,$a0,$a0
+ movrnz $a0,-1,$a0 ! !in2infty
+ stx $a0,[%fp+STACK_BIAS-8]
+
+ ld [$bp+64],$acc0 ! in2_z
+ ld [$bp+64+4],$t0
+ ld [$bp+64+8],$acc1
+ ld [$bp+64+12],$t1
+ ld [$bp+64+16],$acc2
+ ld [$bp+64+20],$t2
+ ld [$bp+64+24],$acc3
+ ld [$bp+64+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ ld [$ap],$a0 ! in1_x
+ or $acc0,$t0,$acc0
+ ld [$ap+4],$t0
+ sllx $t2,32,$t2
+ ld [$ap+8],$a1
+ or $acc1,$t1,$acc1
+ ld [$ap+12],$t1
+ sllx $t3,32,$t3
+ ld [$ap+16],$a2
+ or $acc2,$t2,$acc2
+ ld [$ap+20],$t2
+ or $acc3,$t3,$acc3
+ ld [$ap+24],$a3
+ sllx $t0,32,$t0
+ ld [$ap+28],$t3
+ sllx $t1,32,$t1
+ stx $acc0,[%sp+LOCALS64+$in2_z]
+ sllx $t2,32,$t2
+ stx $acc1,[%sp+LOCALS64+$in2_z+8]
+ sllx $t3,32,$t3
+ stx $acc2,[%sp+LOCALS64+$in2_z+16]
+ stx $acc3,[%sp+LOCALS64+$in2_z+24]
+
+ or $a0,$t0,$a0
+ ld [$ap+32],$acc0 ! in1_y
+ or $a1,$t1,$a1
+ ld [$ap+32+4],$t0
+ or $a2,$t2,$a2
+ ld [$ap+32+8],$acc1
+ or $a3,$t3,$a3
+ ld [$ap+32+12],$t1
+ ld [$ap+32+16],$acc2
+ ld [$ap+32+20],$t2
+ ld [$ap+32+24],$acc3
+ sllx $t0,32,$t0
+ ld [$ap+32+28],$t3
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in1_x]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in1_x+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in1_x+16]
+ or $acc0,$t0,$acc0
+ stx $a3,[%sp+LOCALS64+$in1_x+24]
+ or $acc1,$t1,$acc1
+ stx $acc0,[%sp+LOCALS64+$in1_y]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in1_y+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in1_y+16]
+ stx $acc3,[%sp+LOCALS64+$in1_y+24]
+
+ or $a1,$a0,$a0
+ or $a3,$a2,$a2
+ or $acc1,$acc0,$acc0
+ or $acc3,$acc2,$acc2
+ or $a2,$a0,$a0
+ or $acc2,$acc0,$acc0
+ or $acc0,$a0,$a0
+ movrnz $a0,-1,$a0 ! !in1infty
+ stx $a0,[%fp+STACK_BIAS-16]
+
+ ldx [%sp+LOCALS64+$in2_z],$a0 ! forward load
+ ldx [%sp+LOCALS64+$in2_z+8],$a1
+ ldx [%sp+LOCALS64+$in2_z+16],$a2
+ ldx [%sp+LOCALS64+$in2_z+24],$a3
+
+ ld [$ap+64],$acc0 ! in1_z
+ ld [$ap+64+4],$t0
+ ld [$ap+64+8],$acc1
+ ld [$ap+64+12],$t1
+ ld [$ap+64+16],$acc2
+ ld [$ap+64+20],$t2
+ ld [$ap+64+24],$acc3
+ ld [$ap+64+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ or $acc0,$t0,$acc0
+ sllx $t2,32,$t2
+ or $acc1,$t1,$acc1
+ sllx $t3,32,$t3
+ stx $acc0,[%sp+LOCALS64+$in1_z]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in1_z+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in1_z+16]
+ stx $acc3,[%sp+LOCALS64+$in1_z+24]
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Z2sqr, in2_z);
+ add %sp,LOCALS64+$Z2sqr,$rp
+
+ ldx [%sp+LOCALS64+$in1_z],$a0
+ ldx [%sp+LOCALS64+$in1_z+8],$a1
+ ldx [%sp+LOCALS64+$in1_z+16],$a2
+ ldx [%sp+LOCALS64+$in1_z+24],$a3
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Z1sqr, in1_z);
+ add %sp,LOCALS64+$Z1sqr,$rp
+
+ ldx [%sp+LOCALS64+$Z2sqr],$bi
+ ldx [%sp+LOCALS64+$in2_z],$a0
+ ldx [%sp+LOCALS64+$in2_z+8],$a1
+ ldx [%sp+LOCALS64+$in2_z+16],$a2
+ ldx [%sp+LOCALS64+$in2_z+24],$a3
+ add %sp,LOCALS64+$Z2sqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S1, Z2sqr, in2_z);
+ add %sp,LOCALS64+$S1,$rp
+
+ ldx [%sp+LOCALS64+$Z1sqr],$bi
+ ldx [%sp+LOCALS64+$in1_z],$a0
+ ldx [%sp+LOCALS64+$in1_z+8],$a1
+ ldx [%sp+LOCALS64+$in1_z+16],$a2
+ ldx [%sp+LOCALS64+$in1_z+24],$a3
+ add %sp,LOCALS64+$Z1sqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, Z1sqr, in1_z);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$S1],$bi
+ ldx [%sp+LOCALS64+$in1_y],$a0
+ ldx [%sp+LOCALS64+$in1_y+8],$a1
+ ldx [%sp+LOCALS64+$in1_y+16],$a2
+ ldx [%sp+LOCALS64+$in1_y+24],$a3
+ add %sp,LOCALS64+$S1,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S1, S1, in1_y);
+ add %sp,LOCALS64+$S1,$rp
+
+ ldx [%sp+LOCALS64+$S2],$bi
+ ldx [%sp+LOCALS64+$in2_y],$a0
+ ldx [%sp+LOCALS64+$in2_y+8],$a1
+ ldx [%sp+LOCALS64+$in2_y+16],$a2
+ ldx [%sp+LOCALS64+$in2_y+24],$a3
+ add %sp,LOCALS64+$S2,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, S2, in2_y);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$Z2sqr],$bi ! forward load
+ ldx [%sp+LOCALS64+$in1_x],$a0
+ ldx [%sp+LOCALS64+$in1_x+8],$a1
+ ldx [%sp+LOCALS64+$in1_x+16],$a2
+ ldx [%sp+LOCALS64+$in1_x+24],$a3
+
+ add %sp,LOCALS64+$S1,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(R, S2, S1);
+ add %sp,LOCALS64+$R,$rp
+
+ or $acc1,$acc0,$acc0 ! see if result is zero
+ or $acc3,$acc2,$acc2
+ or $acc2,$acc0,$acc0
+ stx $acc0,[%fp+STACK_BIAS-24]
+
+ add %sp,LOCALS64+$Z2sqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(U1, in1_x, Z2sqr);
+ add %sp,LOCALS64+$U1,$rp
+
+ ldx [%sp+LOCALS64+$Z1sqr],$bi
+ ldx [%sp+LOCALS64+$in2_x],$a0
+ ldx [%sp+LOCALS64+$in2_x+8],$a1
+ ldx [%sp+LOCALS64+$in2_x+16],$a2
+ ldx [%sp+LOCALS64+$in2_x+24],$a3
+ add %sp,LOCALS64+$Z1sqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(U2, in2_x, Z1sqr);
+ add %sp,LOCALS64+$U2,$rp
+
+ ldx [%sp+LOCALS64+$R],$a0 ! forward load
+ ldx [%sp+LOCALS64+$R+8],$a1
+ ldx [%sp+LOCALS64+$R+16],$a2
+ ldx [%sp+LOCALS64+$R+24],$a3
+
+ add %sp,LOCALS64+$U1,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(H, U2, U1);
+ add %sp,LOCALS64+$H,$rp
+
+ or $acc1,$acc0,$acc0 ! see if result is zero
+ or $acc3,$acc2,$acc2
+ orcc $acc2,$acc0,$acc0
+
+ bne,pt %xcc,.Ladd_proceed_vis3 ! is_equal(U1,U2)?
+ nop
+
+ ldx [%fp+STACK_BIAS-8],$t0
+ ldx [%fp+STACK_BIAS-16],$t1
+ ldx [%fp+STACK_BIAS-24],$t2
+ andcc $t0,$t1,%g0
+ be,pt %xcc,.Ladd_proceed_vis3 ! (in1infty || in2infty)?
+ nop
+ andcc $t2,$t2,%g0
+ be,pt %xcc,.Ladd_proceed_vis3 ! is_equal(S1,S2)?
+ nop
+
+ st %g0,[$rp_real]
+ st %g0,[$rp_real+4]
+ st %g0,[$rp_real+8]
+ st %g0,[$rp_real+12]
+ st %g0,[$rp_real+16]
+ st %g0,[$rp_real+20]
+ st %g0,[$rp_real+24]
+ st %g0,[$rp_real+28]
+ st %g0,[$rp_real+32]
+ st %g0,[$rp_real+32+4]
+ st %g0,[$rp_real+32+8]
+ st %g0,[$rp_real+32+12]
+ st %g0,[$rp_real+32+16]
+ st %g0,[$rp_real+32+20]
+ st %g0,[$rp_real+32+24]
+ st %g0,[$rp_real+32+28]
+ st %g0,[$rp_real+64]
+ st %g0,[$rp_real+64+4]
+ st %g0,[$rp_real+64+8]
+ st %g0,[$rp_real+64+12]
+ st %g0,[$rp_real+64+16]
+ st %g0,[$rp_real+64+20]
+ st %g0,[$rp_real+64+24]
+ st %g0,[$rp_real+64+28]
+ b .Ladd_done_vis3
+ nop
+
+.align 16
+.Ladd_proceed_vis3:
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Rsqr, R);
+ add %sp,LOCALS64+$Rsqr,$rp
+
+ ldx [%sp+LOCALS64+$H],$bi
+ ldx [%sp+LOCALS64+$in1_z],$a0
+ ldx [%sp+LOCALS64+$in1_z+8],$a1
+ ldx [%sp+LOCALS64+$in1_z+16],$a2
+ ldx [%sp+LOCALS64+$in1_z+24],$a3
+ add %sp,LOCALS64+$H,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(res_z, H, in1_z);
+ add %sp,LOCALS64+$res_z,$rp
+
+ ldx [%sp+LOCALS64+$H],$a0
+ ldx [%sp+LOCALS64+$H+8],$a1
+ ldx [%sp+LOCALS64+$H+16],$a2
+ ldx [%sp+LOCALS64+$H+24],$a3
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Hsqr, H);
+ add %sp,LOCALS64+$Hsqr,$rp
+
+ ldx [%sp+LOCALS64+$res_z],$bi
+ ldx [%sp+LOCALS64+$in2_z],$a0
+ ldx [%sp+LOCALS64+$in2_z+8],$a1
+ ldx [%sp+LOCALS64+$in2_z+16],$a2
+ ldx [%sp+LOCALS64+$in2_z+24],$a3
+ add %sp,LOCALS64+$res_z,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(res_z, res_z, in2_z);
+ add %sp,LOCALS64+$res_z,$rp
+
+ ldx [%sp+LOCALS64+$H],$bi
+ ldx [%sp+LOCALS64+$Hsqr],$a0
+ ldx [%sp+LOCALS64+$Hsqr+8],$a1
+ ldx [%sp+LOCALS64+$Hsqr+16],$a2
+ ldx [%sp+LOCALS64+$Hsqr+24],$a3
+ add %sp,LOCALS64+$H,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(Hcub, Hsqr, H);
+ add %sp,LOCALS64+$Hcub,$rp
+
+ ldx [%sp+LOCALS64+$U1],$bi
+ ldx [%sp+LOCALS64+$Hsqr],$a0
+ ldx [%sp+LOCALS64+$Hsqr+8],$a1
+ ldx [%sp+LOCALS64+$Hsqr+16],$a2
+ ldx [%sp+LOCALS64+$Hsqr+24],$a3
+ add %sp,LOCALS64+$U1,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(U2, U1, Hsqr);
+ add %sp,LOCALS64+$U2,$rp
+
+ call __ecp_nistz256_mul_by_2_vis3 ! p256_mul_by_2(Hsqr, U2);
+ add %sp,LOCALS64+$Hsqr,$rp
+
+ add %sp,LOCALS64+$Rsqr,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(res_x, Rsqr, Hsqr);
+ add %sp,LOCALS64+$res_x,$rp
+
+ add %sp,LOCALS64+$Hcub,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_x, res_x, Hcub);
+ add %sp,LOCALS64+$res_x,$rp
+
+ ldx [%sp+LOCALS64+$S1],$bi ! forward load
+ ldx [%sp+LOCALS64+$Hcub],$a0
+ ldx [%sp+LOCALS64+$Hcub+8],$a1
+ ldx [%sp+LOCALS64+$Hcub+16],$a2
+ ldx [%sp+LOCALS64+$Hcub+24],$a3
+
+ add %sp,LOCALS64+$U2,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(res_y, U2, res_x);
+ add %sp,LOCALS64+$res_y,$rp
+
+ add %sp,LOCALS64+$S1,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, S1, Hcub);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$R],$bi
+ ldx [%sp+LOCALS64+$res_y],$a0
+ ldx [%sp+LOCALS64+$res_y+8],$a1
+ ldx [%sp+LOCALS64+$res_y+16],$a2
+ ldx [%sp+LOCALS64+$res_y+24],$a3
+ add %sp,LOCALS64+$R,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(res_y, res_y, R);
+ add %sp,LOCALS64+$res_y,$rp
+
+ add %sp,LOCALS64+$S2,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_y, res_y, S2);
+ add %sp,LOCALS64+$res_y,$rp
+
+ ldx [%fp+STACK_BIAS-16],$t1 ! !in1infty
+ ldx [%fp+STACK_BIAS-8],$t2 ! !in2infty
+___
+for($i=0;$i<96;$i+=16) { # conditional moves
+$code.=<<___;
+ ldx [%sp+LOCALS64+$res_x+$i],$acc0 ! res
+ ldx [%sp+LOCALS64+$res_x+$i+8],$acc1
+ ldx [%sp+LOCALS64+$in2_x+$i],$acc2 ! in2
+ ldx [%sp+LOCALS64+$in2_x+$i+8],$acc3
+ ldx [%sp+LOCALS64+$in1_x+$i],$acc4 ! in1
+ ldx [%sp+LOCALS64+$in1_x+$i+8],$acc5
+ movrz $t1,$acc2,$acc0
+ movrz $t1,$acc3,$acc1
+ movrz $t2,$acc4,$acc0
+ movrz $t2,$acc5,$acc1
+ srlx $acc0,32,$acc2
+ srlx $acc1,32,$acc3
+ st $acc0,[$rp_real+$i]
+ st $acc2,[$rp_real+$i+4]
+ st $acc1,[$rp_real+$i+8]
+ st $acc3,[$rp_real+$i+12]
+___
+}
+$code.=<<___;
+.Ladd_done_vis3:
+ ret
+ restore
+.size ecp_nistz256_point_add_vis3,.-ecp_nistz256_point_add_vis3
+___
+}
+########################################################################
+# void ecp_nistz256_point_add_affine(P256_POINT *out,const P256_POINT *in1,
+# const P256_POINT_AFFINE *in2);
+{
+my ($res_x,$res_y,$res_z,
+ $in1_x,$in1_y,$in1_z,
+ $in2_x,$in2_y,
+ $U2,$S2,$H,$R,$Hsqr,$Hcub,$Rsqr)=map(32*$_,(0..14));
+my $Z1sqr = $S2;
+# above map() describes stack layout with 15 temporary
+# 256-bit vectors on top. Then we reserve some space for
+# !in1infty and !in2infty.
+
+$code.=<<___;
+.align 32
+ecp_nistz256_point_add_affine_vis3:
+ save %sp,-STACK64_FRAME-32*15-32,%sp
+
+ mov $rp,$rp_real
+ mov -1,$minus1
+ mov -2,$poly3
+ sllx $minus1,32,$poly1 ! 0xFFFFFFFF00000000
+ srl $poly3,0,$poly3 ! 0x00000000FFFFFFFE
+
+ ! convert input to uint64_t[4]
+ ld [$bp],$a0 ! in2_x
+ ld [$bp+4],$t0
+ ld [$bp+8],$a1
+ ld [$bp+12],$t1
+ ld [$bp+16],$a2
+ ld [$bp+20],$t2
+ ld [$bp+24],$a3
+ ld [$bp+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ ld [$bp+32],$acc0 ! in2_y
+ or $a0,$t0,$a0
+ ld [$bp+32+4],$t0
+ sllx $t2,32,$t2
+ ld [$bp+32+8],$acc1
+ or $a1,$t1,$a1
+ ld [$bp+32+12],$t1
+ sllx $t3,32,$t3
+ ld [$bp+32+16],$acc2
+ or $a2,$t2,$a2
+ ld [$bp+32+20],$t2
+ or $a3,$t3,$a3
+ ld [$bp+32+24],$acc3
+ sllx $t0,32,$t0
+ ld [$bp+32+28],$t3
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in2_x]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in2_x+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in2_x+16]
+ or $acc0,$t0,$acc0
+ stx $a3,[%sp+LOCALS64+$in2_x+24]
+ or $acc1,$t1,$acc1
+ stx $acc0,[%sp+LOCALS64+$in2_y]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in2_y+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in2_y+16]
+ stx $acc3,[%sp+LOCALS64+$in2_y+24]
+
+ or $a1,$a0,$a0
+ or $a3,$a2,$a2
+ or $acc1,$acc0,$acc0
+ or $acc3,$acc2,$acc2
+ or $a2,$a0,$a0
+ or $acc2,$acc0,$acc0
+ or $acc0,$a0,$a0
+ movrnz $a0,-1,$a0 ! !in2infty
+ stx $a0,[%fp+STACK_BIAS-8]
+
+ ld [$ap],$a0 ! in1_x
+ ld [$ap+4],$t0
+ ld [$ap+8],$a1
+ ld [$ap+12],$t1
+ ld [$ap+16],$a2
+ ld [$ap+20],$t2
+ ld [$ap+24],$a3
+ ld [$ap+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ ld [$ap+32],$acc0 ! in1_y
+ or $a0,$t0,$a0
+ ld [$ap+32+4],$t0
+ sllx $t2,32,$t2
+ ld [$ap+32+8],$acc1
+ or $a1,$t1,$a1
+ ld [$ap+32+12],$t1
+ sllx $t3,32,$t3
+ ld [$ap+32+16],$acc2
+ or $a2,$t2,$a2
+ ld [$ap+32+20],$t2
+ or $a3,$t3,$a3
+ ld [$ap+32+24],$acc3
+ sllx $t0,32,$t0
+ ld [$ap+32+28],$t3
+ sllx $t1,32,$t1
+ stx $a0,[%sp+LOCALS64+$in1_x]
+ sllx $t2,32,$t2
+ stx $a1,[%sp+LOCALS64+$in1_x+8]
+ sllx $t3,32,$t3
+ stx $a2,[%sp+LOCALS64+$in1_x+16]
+ or $acc0,$t0,$acc0
+ stx $a3,[%sp+LOCALS64+$in1_x+24]
+ or $acc1,$t1,$acc1
+ stx $acc0,[%sp+LOCALS64+$in1_y]
+ or $acc2,$t2,$acc2
+ stx $acc1,[%sp+LOCALS64+$in1_y+8]
+ or $acc3,$t3,$acc3
+ stx $acc2,[%sp+LOCALS64+$in1_y+16]
+ stx $acc3,[%sp+LOCALS64+$in1_y+24]
+
+ or $a1,$a0,$a0
+ or $a3,$a2,$a2
+ or $acc1,$acc0,$acc0
+ or $acc3,$acc2,$acc2
+ or $a2,$a0,$a0
+ or $acc2,$acc0,$acc0
+ or $acc0,$a0,$a0
+ movrnz $a0,-1,$a0 ! !in1infty
+ stx $a0,[%fp+STACK_BIAS-16]
+
+ ld [$ap+64],$a0 ! in1_z
+ ld [$ap+64+4],$t0
+ ld [$ap+64+8],$a1
+ ld [$ap+64+12],$t1
+ ld [$ap+64+16],$a2
+ ld [$ap+64+20],$t2
+ ld [$ap+64+24],$a3
+ ld [$ap+64+28],$t3
+ sllx $t0,32,$t0
+ sllx $t1,32,$t1
+ or $a0,$t0,$a0
+ sllx $t2,32,$t2
+ or $a1,$t1,$a1
+ sllx $t3,32,$t3
+ stx $a0,[%sp+LOCALS64+$in1_z]
+ or $a2,$t2,$a2
+ stx $a1,[%sp+LOCALS64+$in1_z+8]
+ or $a3,$t3,$a3
+ stx $a2,[%sp+LOCALS64+$in1_z+16]
+ stx $a3,[%sp+LOCALS64+$in1_z+24]
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Z1sqr, in1_z);
+ add %sp,LOCALS64+$Z1sqr,$rp
+
+ ldx [%sp+LOCALS64+$in2_x],$bi
+ mov $acc0,$a0
+ mov $acc1,$a1
+ mov $acc2,$a2
+ mov $acc3,$a3
+ add %sp,LOCALS64+$in2_x,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(U2, Z1sqr, in2_x);
+ add %sp,LOCALS64+$U2,$rp
+
+ ldx [%sp+LOCALS64+$Z1sqr],$bi ! forward load
+ ldx [%sp+LOCALS64+$in1_z],$a0
+ ldx [%sp+LOCALS64+$in1_z+8],$a1
+ ldx [%sp+LOCALS64+$in1_z+16],$a2
+ ldx [%sp+LOCALS64+$in1_z+24],$a3
+
+ add %sp,LOCALS64+$in1_x,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(H, U2, in1_x);
+ add %sp,LOCALS64+$H,$rp
+
+ add %sp,LOCALS64+$Z1sqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, Z1sqr, in1_z);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$H],$bi
+ ldx [%sp+LOCALS64+$in1_z],$a0
+ ldx [%sp+LOCALS64+$in1_z+8],$a1
+ ldx [%sp+LOCALS64+$in1_z+16],$a2
+ ldx [%sp+LOCALS64+$in1_z+24],$a3
+ add %sp,LOCALS64+$H,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(res_z, H, in1_z);
+ add %sp,LOCALS64+$res_z,$rp
+
+ ldx [%sp+LOCALS64+$S2],$bi
+ ldx [%sp+LOCALS64+$in2_y],$a0
+ ldx [%sp+LOCALS64+$in2_y+8],$a1
+ ldx [%sp+LOCALS64+$in2_y+16],$a2
+ ldx [%sp+LOCALS64+$in2_y+24],$a3
+ add %sp,LOCALS64+$S2,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, S2, in2_y);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$H],$a0 ! forward load
+ ldx [%sp+LOCALS64+$H+8],$a1
+ ldx [%sp+LOCALS64+$H+16],$a2
+ ldx [%sp+LOCALS64+$H+24],$a3
+
+ add %sp,LOCALS64+$in1_y,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(R, S2, in1_y);
+ add %sp,LOCALS64+$R,$rp
+
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Hsqr, H);
+ add %sp,LOCALS64+$Hsqr,$rp
+
+ ldx [%sp+LOCALS64+$R],$a0
+ ldx [%sp+LOCALS64+$R+8],$a1
+ ldx [%sp+LOCALS64+$R+16],$a2
+ ldx [%sp+LOCALS64+$R+24],$a3
+ call __ecp_nistz256_sqr_mont_vis3 ! p256_sqr_mont(Rsqr, R);
+ add %sp,LOCALS64+$Rsqr,$rp
+
+ ldx [%sp+LOCALS64+$H],$bi
+ ldx [%sp+LOCALS64+$Hsqr],$a0
+ ldx [%sp+LOCALS64+$Hsqr+8],$a1
+ ldx [%sp+LOCALS64+$Hsqr+16],$a2
+ ldx [%sp+LOCALS64+$Hsqr+24],$a3
+ add %sp,LOCALS64+$H,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(Hcub, Hsqr, H);
+ add %sp,LOCALS64+$Hcub,$rp
+
+ ldx [%sp+LOCALS64+$Hsqr],$bi
+ ldx [%sp+LOCALS64+$in1_x],$a0
+ ldx [%sp+LOCALS64+$in1_x+8],$a1
+ ldx [%sp+LOCALS64+$in1_x+16],$a2
+ ldx [%sp+LOCALS64+$in1_x+24],$a3
+ add %sp,LOCALS64+$Hsqr,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(U2, in1_x, Hsqr);
+ add %sp,LOCALS64+$U2,$rp
+
+ call __ecp_nistz256_mul_by_2_vis3 ! p256_mul_by_2(Hsqr, U2);
+ add %sp,LOCALS64+$Hsqr,$rp
+
+ add %sp,LOCALS64+$Rsqr,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(res_x, Rsqr, Hsqr);
+ add %sp,LOCALS64+$res_x,$rp
+
+ add %sp,LOCALS64+$Hcub,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_x, res_x, Hcub);
+ add %sp,LOCALS64+$res_x,$rp
+
+ ldx [%sp+LOCALS64+$Hcub],$bi ! forward load
+ ldx [%sp+LOCALS64+$in1_y],$a0
+ ldx [%sp+LOCALS64+$in1_y+8],$a1
+ ldx [%sp+LOCALS64+$in1_y+16],$a2
+ ldx [%sp+LOCALS64+$in1_y+24],$a3
+
+ add %sp,LOCALS64+$U2,$bp
+ call __ecp_nistz256_sub_morf_vis3 ! p256_sub(res_y, U2, res_x);
+ add %sp,LOCALS64+$res_y,$rp
+
+ add %sp,LOCALS64+$Hcub,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(S2, in1_y, Hcub);
+ add %sp,LOCALS64+$S2,$rp
+
+ ldx [%sp+LOCALS64+$R],$bi
+ ldx [%sp+LOCALS64+$res_y],$a0
+ ldx [%sp+LOCALS64+$res_y+8],$a1
+ ldx [%sp+LOCALS64+$res_y+16],$a2
+ ldx [%sp+LOCALS64+$res_y+24],$a3
+ add %sp,LOCALS64+$R,$bp
+ call __ecp_nistz256_mul_mont_vis3 ! p256_mul_mont(res_y, res_y, R);
+ add %sp,LOCALS64+$res_y,$rp
+
+ add %sp,LOCALS64+$S2,$bp
+ call __ecp_nistz256_sub_from_vis3 ! p256_sub(res_y, res_y, S2);
+ add %sp,LOCALS64+$res_y,$rp
+
+ ldx [%fp+STACK_BIAS-16],$t1 ! !in1infty
+ ldx [%fp+STACK_BIAS-8],$t2 ! !in2infty
+1: call .+8
+ add %o7,.Lone_mont_vis3-1b,$bp
+___
+for($i=0;$i<64;$i+=16) { # conditional moves
+$code.=<<___;
+ ldx [%sp+LOCALS64+$res_x+$i],$acc0 ! res
+ ldx [%sp+LOCALS64+$res_x+$i+8],$acc1
+ ldx [%sp+LOCALS64+$in2_x+$i],$acc2 ! in2
+ ldx [%sp+LOCALS64+$in2_x+$i+8],$acc3
+ ldx [%sp+LOCALS64+$in1_x+$i],$acc4 ! in1
+ ldx [%sp+LOCALS64+$in1_x+$i+8],$acc5
+ movrz $t1,$acc2,$acc0
+ movrz $t1,$acc3,$acc1
+ movrz $t2,$acc4,$acc0
+ movrz $t2,$acc5,$acc1
+ srlx $acc0,32,$acc2
+ srlx $acc1,32,$acc3
+ st $acc0,[$rp_real+$i]
+ st $acc2,[$rp_real+$i+4]
+ st $acc1,[$rp_real+$i+8]
+ st $acc3,[$rp_real+$i+12]
+___
+}
+for(;$i<96;$i+=16) {
+$code.=<<___;
+ ldx [%sp+LOCALS64+$res_x+$i],$acc0 ! res
+ ldx [%sp+LOCALS64+$res_x+$i+8],$acc1
+ ldx [$bp+$i-64],$acc2 ! "in2"
+ ldx [$bp+$i-64+8],$acc3
+ ldx [%sp+LOCALS64+$in1_x+$i],$acc4 ! in1
+ ldx [%sp+LOCALS64+$in1_x+$i+8],$acc5
+ movrz $t1,$acc2,$acc0
+ movrz $t1,$acc3,$acc1
+ movrz $t2,$acc4,$acc0
+ movrz $t2,$acc5,$acc1
+ srlx $acc0,32,$acc2
+ srlx $acc1,32,$acc3
+ st $acc0,[$rp_real+$i]
+ st $acc2,[$rp_real+$i+4]
+ st $acc1,[$rp_real+$i+8]
+ st $acc3,[$rp_real+$i+12]
+___
+}
+$code.=<<___;
+ ret
+ restore
+.size ecp_nistz256_point_add_affine_vis3,.-ecp_nistz256_point_add_affine_vis3
+.align 64
+.Lone_mont_vis3:
+.long 0x00000000,0x00000001, 0xffffffff,0x00000000
+.long 0xffffffff,0xffffffff, 0x00000000,0xfffffffe
+.align 64
+___
+} }}}
+\f
+# Purpose of these subroutines is to explicitly encode VIS instructions,
+# so that one can compile the module without having to specify VIS
+# extensions on compiler command line, e.g. -xarch=v9 vs. -xarch=v9a.
+# Idea is to reserve for option to produce "universal" binary and let
+# programmer detect if current CPU is VIS capable at run-time.
+sub unvis3 {
+my ($mnemonic,$rs1,$rs2,$rd)=@_;
+my %bias = ( "g" => 0, "o" => 8, "l" => 16, "i" => 24 );
+my ($ref,$opf);
+my %visopf = ( "addxc" => 0x011,
+ "addxccc" => 0x013,
+ "umulxhi" => 0x016 );
+
+ $ref = "$mnemonic\t$rs1,$rs2,$rd";
+
+ if ($opf=$visopf{$mnemonic}) {
+ foreach ($rs1,$rs2,$rd) {
+ return $ref if (!/%([goli])([0-9])/);
+ $_=$bias{$1}+$2;
+ }
+
+ return sprintf ".word\t0x%08x !%s",
+ 0x81b00000|$rd<<25|$rs1<<14|$opf<<5|$rs2,
+ $ref;
+ } else {
+ return $ref;
+ }
+}
+
+foreach (split("\n",$code)) {
+ s/\`([^\`]*)\`/eval $1/ge;
+
+ s/\b(umulxhi|addxc[c]{0,2})\s+(%[goli][0-7]),\s*(%[goli][0-7]),\s*(%[goli][0-7])/
+ &unvis3($1,$2,$3,$4)
+ /ge;
+
+ print $_,"\n";
+}
+
+close STDOUT;
projects / openssl / commitdiff