[x86] Rename avx-{s,z}ext.ll to vector-{s,z}ext.ll.

[oota-llvm.git] / test / CodeGen / X86 / blend-msb.ll

diff --git a/test/CodeGen/X86/blend-msb.ll b/test/CodeGen/X86/blend-msb.ll
index 34445428ea284bfb50b06200572f3420c8e30016..34aaf2c31ace34cc02aa7bfd039a33184c70db98 100644 (file)
--- a/test/CodeGen/X86/blend-msb.ll
+++ b/test/CodeGen/X86/blend-msb.ll
@@ -1,35 +1,38 @@
-; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7 -mattr=+sse41 | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7 -mattr=+sse4.1 | FileCheck %s
 
 
-; In this test we check that sign-extend of the mask bit is performed by
-; shifting the needed bit to the MSB, and not using shl+sra.
+; Verify that we produce movss instead of blendvps when possible.
 
-;CHECK: vsel_float
-;CHECK: pslld
-;CHECK-NEXT: blendvps
+;CHECK-LABEL: vsel_float:
+;CHECK-NOT: blend
+;CHECK: movss
 ;CHECK: ret
 define <4 x float> @vsel_float(<4 x float> %v1, <4 x float> %v2) {
   %vsel = select <4 x i1> <i1 true, i1 false, i1 false, i1 false>, <4 x float> %v1, <4 x float> %v2
   ret <4 x float> %vsel
 }
 
-;CHECK: vsel_4xi8
-;CHECK: pslld
-;CHECK-NEXT: blendvps
+;CHECK-LABEL: vsel_4xi8:
+;CHECK-NOT: blend
+;CHECK: movss
 ;CHECK: ret
 define <4 x i8> @vsel_4xi8(<4 x i8> %v1, <4 x i8> %v2) {
   %vsel = select <4 x i1> <i1 true, i1 false, i1 false, i1 false>, <4 x i8> %v1, <4 x i8> %v2
   ret <4 x i8> %vsel
 }
 
-
-; We do not have native support for v8i16 blends and we have to use the
-; blendvb instruction or a sequence of NAND/OR/AND. Make sure that we do not r
-; reduce the mask in this case.
-;CHECK: vsel_8xi16
-;CHECK: psllw
-;CHECK-NOT: psraw
-;CHECK: pblendvb
+;CHECK-LABEL: vsel_8xi16:
+; The select mask is
+; <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>
+; which translates into the boolean mask (big endian representation):
+; 00010001 = 17.
+; '1' means takes the first argument, '0' means takes the second argument.
+; This is the opposite of the intel syntax, thus we expect
+; the inverted mask: 11101110 = 238.
+; According to the ABI:
+; v1 is in xmm0 => first argument is xmm0.
+; v2 is in xmm1 => second argument is xmm1.
+;CHECK: pblendw $238, %xmm1, %xmm0
 ;CHECK: ret
 define <8 x i16> @vsel_8xi16(<8 x i16> %v1, <8 x i16> %v2) {
   %vsel = select <8 x i1> <i1 true, i1 false, i1 false, i1 false, i1 true, i1 false, i1 false, i1 false>, <8 x i16> %v1, <8 x i16> %v2