Author: lattner
Date: Sat Nov 24 00:13:33 2007
New Revision: 44299
URL: http://llvm.org/viewvc/llvm-project?rev=44299&view=rev
Log:
add a note
Modified:
llvm/trunk/lib/Target/X86/README.txt
Modified: llvm/trunk/lib/Target/X86/README.txt
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/README.txt?rev=44299&r1=44298&r2=44299&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/README.txt (original)
+++ llvm/trunk/lib/Target/X86/README.txt Sat Nov 24 00:13:33 2007
@@ -1511,3 +1511,24 @@
cmpl $262144, %eax
//===---------------------------------------------------------------------===//
+
+define i64 @test(double %X) {
+ %Y = fptosi double %X to i64
+ ret i64 %Y
+}
+
+compiles to:
+
+_test:
+ subl $20, %esp
+ movsd 24(%esp), %xmm0
+ movsd %xmm0, 8(%esp)
+ fldl 8(%esp)
+ fisttpll (%esp)
+ movl 4(%esp), %edx
+ movl (%esp), %eax
+ addl $20, %esp
+ #FP_REG_KILL
+ ret
+
+This should just fldl directly from the input stack slot.
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