From ca4dbf3219fc684afe8f8afcd8428ad1a262c445 Mon Sep 17 00:00:00 2001
From: Kit Barton <kbarton@ca.ibm.com>
Date: Thu, 2 Jul 2015 19:29:05 +0000
Subject: [PATCH] This patch adds support for the vector merge even word and
 vector merge odd word instructions introduced in POWER8.

These are the Clang-related changes for http://reviews.llvm.org/D10704

All builtins are added in altivec.h and guarded with the POWER8_VECTOR macro.

Phabricator review: http://reviews.llvm.org/D10736


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241293 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Headers/altivec.h                | 50 ++++++++++++++++++++++++++++
 test/CodeGen/builtins-ppc-p8vector.c | 28 ++++++++++++++++
 2 files changed, 78 insertions(+)

diff --git a/lib/Headers/altivec.h b/lib/Headers/altivec.h
index be0a1dbc11..2c80e24db3 100644
--- a/lib/Headers/altivec.h
+++ b/lib/Headers/altivec.h
@@ -3180,6 +3180,56 @@ static vector float __ATTRS_o_ai vec_vmrglw(vector float __a,
                                          0x1C, 0x1D, 0x1E, 0x1F));
 }
 
+
+#ifdef __POWER8_VECTOR__
+/* vec_mergee */
+
+static vector bool int __ATTRS_o_ai
+vec_mergee(vector bool int __a, vector bool int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x00, 0x01, 0x02, 0x03, 0x10, 0x11, 0x12, 0x13, 
+                   0x08, 0x09, 0x0A, 0x0B, 0x18, 0x19, 0x1A, 0x1B));
+}
+
+static vector signed int __ATTRS_o_ai
+vec_mergee(vector signed int __a, vector signed int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x00, 0x01, 0x02, 0x03, 0x10, 0x11, 0x12, 0x13, 
+                   0x08, 0x09, 0x0A, 0x0B, 0x18, 0x19, 0x1A, 0x1B));
+}
+
+static vector unsigned int __ATTRS_o_ai
+vec_mergee(vector unsigned int __a, vector unsigned int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x00, 0x01, 0x02, 0x03, 0x10, 0x11, 0x12, 0x13, 
+                   0x08, 0x09, 0x0A, 0x0B, 0x18, 0x19, 0x1A, 0x1B));
+}
+
+/* vec_mergeo */
+
+static vector bool int  __ATTRS_o_ai
+vec_mergeo(vector bool int __a, vector bool int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x04, 0x05, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17,
+                   0x0C, 0x0D, 0x0E, 0x0F, 0x1C, 0x1D, 0x1E, 0x1F));
+}
+
+static vector signed int  __ATTRS_o_ai
+vec_mergeo(vector signed int __a, vector signed int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x04, 0x05, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17,
+                   0x0C, 0x0D, 0x0E, 0x0F, 0x1C, 0x1D, 0x1E, 0x1F));
+}
+
+static vector unsigned int  __ATTRS_o_ai
+vec_mergeo(vector unsigned int __a, vector unsigned int __b) {
+  return vec_perm(__a, __b, (vector unsigned char)
+                  (0x04, 0x05, 0x06, 0x07, 0x14, 0x15, 0x16, 0x17,
+                   0x0C, 0x0D, 0x0E, 0x0F, 0x1C, 0x1D, 0x1E, 0x1F));
+}
+
+#endif
+
 /* vec_mfvscr */
 
 static vector unsigned short __attribute__((__always_inline__))
diff --git a/test/CodeGen/builtins-ppc-p8vector.c b/test/CodeGen/builtins-ppc-p8vector.c
index 7afc5c75f3..61e14ba283 100644
--- a/test/CodeGen/builtins-ppc-p8vector.c
+++ b/test/CodeGen/builtins-ppc-p8vector.c
@@ -55,6 +55,34 @@ void test1() {
 // CHECK-LE: add <2 x i64>
 // CHECK-PPC: error: call to 'vec_add' is ambiguous
 
+  /* vec_mergee */  
+  res_vbi = vec_mergee(vbi, vbi);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+  
+  res_vi = vec_mergee(vi, vi);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+
+  res_vui = vec_mergee(vui, vui);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+// CHECK-PPC: warning: implicit declaration of function 'vec_mergee'
+
+  /* vec_mergeo */
+  res_vbi = vec_mergeo(vbi, vbi);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+
+  res_vi = vec_mergeo(vi, vi);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+
+  res_vui = vec_mergeo(vui, vui);
+// CHECK: @llvm.ppc.altivec.vperm
+// CHECK-LE: @llvm.ppc.altivec.vperm
+// CHECK-PPC: warning: implicit declaration of function 'vec_mergeo'
+  
   /* vec_cmpeq */
   res_vbll = vec_cmpeq(vsll, vsll);
 // CHECK: @llvm.ppc.altivec.vcmpequd
-- 
2.40.0