diff options
| author | Bill Wendling <isanbard@gmail.com> | 2007-05-02 21:42:20 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2007-05-02 21:42:20 +0000 |
| commit | 4b693b01fb323d373111de43261676ec0905acd7 (patch) | |
| tree | f92026e9ee96f57e5c0cd9cb5d119645665bdb08 | |
| parent | 3e15bf33e024b9df9e89351a165acfdb1dde51ed (diff) | |
| download | llvm-4b693b01fb323d373111de43261676ec0905acd7.tar.gz llvm-4b693b01fb323d373111de43261676ec0905acd7.tar.bz2 llvm-4b693b01fb323d373111de43261676ec0905acd7.tar.xz | |
Update.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36653 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/README-MMX.txt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/Target/X86/README-MMX.txt b/lib/Target/X86/README-MMX.txt index f3a625e65d..57c7c3f48c 100644 --- a/lib/Target/X86/README-MMX.txt +++ b/lib/Target/X86/README-MMX.txt @@ -40,3 +40,30 @@ _qux: movl %edx, 4(%eax) addl $12, %esp ret $4 + +//===---------------------------------------------------------------------===// + +int main() { + __m64 A[1] = { _mm_cvtsi32_si64(1) }; + __m64 B[1] = { _mm_cvtsi32_si64(10) }; + __m64 sum = _mm_cvtsi32_si64(0); + + sum = __builtin_ia32_paddq(__builtin_ia32_paddq(A[0], B[0]), sum); + + printf("Sum = %d\n", _mm_cvtsi64_si32(sum)); + return 0; +} + +Generates: + + movl $11, %eax +### movd %eax, %mm0 +### movq %mm0, 8(%esp) +### movl 8(%esp), %eax + movl %eax, 4(%esp) + movl $_str, (%esp) + call L_printf$stub + xorl %eax, %eax + addl $28, %esp + +These instructions are unnecessary. |