[llvm-commits] [llvm] r45280 - /llvm/trunk/lib/Target/X86/README-SSE.txt

[Evan Cheng]

Author: evancheng
Date: Thu Dec 20 19:31:58 2007
New Revision: 45280

URL: http://llvm.org/viewvc/llvm-project?rev=45280&view=rev
Log:
New entry.

Modified:
    llvm/trunk/lib/Target/X86/README-SSE.txt

Modified: llvm/trunk/lib/Target/X86/README-SSE.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/README-SSE.txt?rev=45280&r1=45279&r2=45280&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/README-SSE.txt (original)
+++ llvm/trunk/lib/Target/X86/README-SSE.txt Thu Dec 20 19:31:58 2007
@@ -741,3 +741,18 @@
 
 
 //===---------------------------------------------------------------------===//
+
+#include <math.h>
+int t1(double d) { return signbit(d); }
+
+This currently compiles to:
+	subl	$12, %esp
+	movsd	16(%esp), %xmm0
+	movsd	%xmm0, (%esp)
+	movl	4(%esp), %eax
+	shrl	$31, %eax
+	addl	$12, %esp
+	ret
+
+We should use movmskp{s|d} instead.
+