From a933a559f6e509c1a55cf3824ddf7635538ebf1d Mon Sep 17 00:00:00 2001
From: Michael Zuckerman <Michael.zuckerman@intel.com>
Date: Wed, 2 Dec 2015 14:34:34 +0000
Subject: [PATCH] By intel spec
|9B DD /7| FSTSW m2byte| Valid Valid Store FPU status word at m2byteafter checking for pending unmasked floating-point exceptions.|
|9B DF E0| FSTSW AX| Valid Valid Store FPU status word in AX register after checking for pending unmasked floating-point exceptions.|
|DD /7 |FNSTSW *m2byte| Valid Valid Store FPU status word at m2bytewithout checking for pending unmasked floating-point exceptions.|
|DF E0 |FNSTSW *AX| Valid Valid Store FPU status word in AX register without checking for pending unmasked floating-point exceptions|
m2byte is word register, and therefor instruction operand need to be change from f32mem to i16mem.
Differential Revision: http://reviews.llvm.org/D14953
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254512 91177308-0d34-0410-b5e6-96231b3b80d8
---
lib/Target/X86/X86InstrFPStack.td | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Target/X86/X86InstrFPStack.td b/lib/Target/X86/X86InstrFPStack.td
index 8fecc9b1a3f..03ae21125b0 100644
--- a/lib/Target/X86/X86InstrFPStack.td
+++ b/lib/Target/X86/X86InstrFPStack.td
@@ -336,7 +336,7 @@ def FCOMP64m : FPI<0xDC, MRM3m, (outs), (ins f64mem:$src), "fcomp{l}\t$src">;
def FRSTORm : FPI<0xDD, MRM4m, (outs f32mem:$dst), (ins), "frstor\t$dst">;
def FSAVEm : FPI<0xDD, MRM6m, (outs f32mem:$dst), (ins), "fnsave\t$dst">;
-def FNSTSWm : FPI<0xDD, MRM7m, (outs f32mem:$dst), (ins), "fnstsw\t$dst">;
+def FNSTSWm : FPI<0xDD, MRM7m, (outs i16mem:$dst), (ins), "fnstsw\t$dst">;
def FICOM16m : FPI<0xDE, MRM2m, (outs), (ins i16mem:$src), "ficom{s}\t$src">;
def FICOMP16m: FPI<0xDE, MRM3m, (outs), (ins i16mem:$src), "ficomp{s}\t$src">;
--
2.34.1