diff options
| -rw-r--r-- | lib/Target/X86/README-SSE.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/Target/X86/README-SSE.txt b/lib/Target/X86/README-SSE.txt index 5f114a855f..61649726e3 100644 --- a/lib/Target/X86/README-SSE.txt +++ b/lib/Target/X86/README-SSE.txt @@ -787,5 +787,23 @@ _foo2: In sse4 mode, we could use insertps to make both better. +Here's another testcase that could use insertps [mem]: + +#include <xmmintrin.h> +extern float x2, x3; +__m128 foo1 (float x1, float x4) { + return _mm_set_ps (x2, x1, x3, x4); +} + +gcc mainline compiles it to: + +foo1: + insertps $0x10, x2(%rip), %xmm0 + insertps $0x10, x3(%rip), %xmm1 + movaps %xmm1, %xmm2 + movlhps %xmm0, %xmm2 + movaps %xmm2, %xmm0 + ret + //===---------------------------------------------------------------------===// |