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| author | Chris Lattner <sabre@nondot.org> | 2008-05-13 19:56:20 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-05-13 19:56:20 +0000 |
| commit | 3b34e1e9e8af6d173699fd2de937fc609752a048 (patch) | |
| tree | 1f836ee56ec5e66dcdc63932080b211185f9f635 /lib/Target/X86/README-SSE.txt | |
| parent | b6564433662d6c8ecef5982c8d3f7073be0f968a (diff) | |
| download | llvm-3b34e1e9e8af6d173699fd2de937fc609752a048.tar.gz llvm-3b34e1e9e8af6d173699fd2de937fc609752a048.tar.bz2 llvm-3b34e1e9e8af6d173699fd2de937fc609752a048.tar.xz | |
add a note
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51062 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/README-SSE.txt')
| -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 + //===---------------------------------------------------------------------===// |