From: Evan Cheng <evan.cheng@apple.com>
Date: Wed, 31 May 2006 22:05:11 +0000 (+0000)
Subject: Sign extender
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f91c10153cbf7d7e61d0bc5601caaa6db00a449f;p=oota-llvm.git

Sign extender


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28603 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index d222bead62f..cd023cc74f5 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -706,14 +706,6 @@ def IDIV16m: I<0xF7, MRM7m, (ops i16mem:$src),     // DX:AX/[mem16] = AX,DX
 def IDIV32m: I<0xF7, MRM7m, (ops i32mem:$src),     // EDX:EAX/[mem32] = EAX,EDX
                "idiv{l} $src", []>, Imp<[EAX,EDX],[EAX,EDX]>;
 
-// Sign-extenders for division.
-def CBW : I<0x98, RawFrm, (ops),
-            "{cbtw|cbw}", []>, Imp<[AL],[AH]>;   // AX = signext(AL)
-def CWD : I<0x99, RawFrm, (ops),
-            "{cwtd|cwd}", []>, Imp<[AX],[DX]>;   // DX:AX = signext(AX)
-def CDQ : I<0x99, RawFrm, (ops),
-            "{cltd|cdq}", []>, Imp<[EAX],[EDX]>; // EDX:EAX = signext(EAX)
-          
 
 //===----------------------------------------------------------------------===//
 //  Two address Instructions...
@@ -2285,6 +2277,16 @@ def MOVZX32rm16: I<0xB7, MRMSrcMem, (ops GR32:$dst, i16mem:$src),
                    "movz{wl|x} {$src, $dst|$dst, $src}",
                    [(set GR32:$dst, (zextloadi32i16 addr:$src))]>, TB;
 
+def CBW : I<0x98, RawFrm, (ops),
+            "{cbtw|cbw}", []>, Imp<[AL],[AX]>;   // AX = signext(AL)
+def CWDE : I<0x98, RawFrm, (ops),
+            "{cwtl|cwde}", []>, Imp<[AX],[EAX]>;   // EAX = signext(AX)
+
+def CWD : I<0x99, RawFrm, (ops),
+            "{cwtd|cwd}", []>, Imp<[AX],[AX,DX]>;   // DX:AX = signext(AX)
+def CDQ : I<0x99, RawFrm, (ops),
+            "{cltd|cdq}", []>, Imp<[EAX],[EAX,EDX]>; // EDX:EAX = signext(EAX)
+          
 //===----------------------------------------------------------------------===//
 // Miscellaneous Instructions
 //===----------------------------------------------------------------------===//