[llvm-commits] CVS: llvm/lib/Target/X86/README-MMX.txt

[Bill Wendling]

Changes in directory llvm/lib/Target/X86:

README-MMX.txt updated: 1.3 -> 1.4
---
Log message:

Update.


---
Diffs of the changes:  (+27 -0)

 README-MMX.txt |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+)


Index: llvm/lib/Target/X86/README-MMX.txt
diff -u llvm/lib/Target/X86/README-MMX.txt:1.3 llvm/lib/Target/X86/README-MMX.txt:1.4
--- llvm/lib/Target/X86/README-MMX.txt:1.3	Tue Apr 24 16:20:03 2007
+++ llvm/lib/Target/X86/README-MMX.txt	Wed May  2 16:42:20 2007
@@ -40,3 +40,30 @@
         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.