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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 | 03ce206143c56e18f3c087bb259625b770b91985 (patch) | |
| tree | cab05b15576b43b6df6bddec49c2d1466fb811aa /llvm/lib/Target | |
| parent | f8ab712fa940874ef6cd4b045532d0eeb49d99c8 (diff) | |
| download | bcm5719-llvm-03ce206143c56e18f3c087bb259625b770b91985.tar.gz bcm5719-llvm-03ce206143c56e18f3c087bb259625b770b91985.zip | |
add a note
llvm-svn: 51062
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/README-SSE.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/README-SSE.txt b/llvm/lib/Target/X86/README-SSE.txt index 5f114a855f0..61649726e38 100644 --- a/llvm/lib/Target/X86/README-SSE.txt +++ b/llvm/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 + //===---------------------------------------------------------------------===// |
