Small optimization on AVR32

* syscall.c (syscall_enter): Optimize tcp->u_arg[i] setting
from regs.FOO for AVR32.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

diff --git a/syscall.c b/syscall.c
index 89861ad0398c73b41cb474ee305291079b6e4602..f8c4c8bafcc4ded474104d7d293b96bcfb21bc45 100644 (file)
--- a/syscall.c
+++ b/syscall.c
@@ -1503,15 +1503,14 @@ syscall_enter(struct tcb *tcp)
        for (i = 0; i < nargs; ++i)
                tcp->u_arg[i] = regs.uregs[i];
 # elif defined(AVR32)
-       /* TODO: make it faster by unrolling into 6 direct assignments */
-       static const unsigned long *argregp[MAX_ARGS] = { &regs.r12,
-                                                         &regs.r11,
-                                                         &regs.r10,
-                                                         &regs.r9,
-                                                         &regs.r5,
-                                                         &regs.r3 };
-       for (i = 0; i < nargs; ++i)
-               tcp->u_arg[i] = *argregp[i];
+       (void)i;
+       (void)nargs;
+       tcp->u_arg[0] = regs.r12;
+       tcp->u_arg[1] = regs.r11;
+       tcp->u_arg[2] = regs.r10;
+       tcp->u_arg[3] = regs.r9;
+       tcp->u_arg[4] = regs.r5;
+       tcp->u_arg[5] = regs.r3;
 # elif defined(BFIN)
        static const int argreg[MAX_ARGS] = { PT_R0, PT_R1, PT_R2, PT_R3, PT_R4, PT_R5 };