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match a reassociated form of fnmul. This implements CodeGen/ARM/fnmul.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36660 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-03 00:32:00 +00:00
parent f972db0f4f
commit 72939126d4
2 changed files with 9 additions and 2 deletions
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1
lib/Target/ARM/ARMISelDAGToDAG.cpp
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@ -27,6 +27,7 @@
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Support/Debug.h"
using namespace llvm;

10
lib/Target/ARM/ARMInstrVFP.td
View File

@ -139,8 +139,7 @@ def FMULD : ADI<(ops DPR:$dst, DPR:$a, DPR:$b),
def FMULS : ASI<(ops SPR:$dst, SPR:$a, SPR:$b),
"fmuls $dst, $a, $b",
[(set SPR:$dst, (fmul SPR:$a, SPR:$b))]>;
def FNMULD : ADI<(ops DPR:$dst, DPR:$a, DPR:$b),
"fnmuld $dst, $a, $b",
[(set DPR:$dst, (fneg (fmul DPR:$a, DPR:$b)))]>;
@ -149,6 +148,13 @@ def FNMULS : ASI<(ops SPR:$dst, SPR:$a, SPR:$b),
"fnmuls $dst, $a, $b",
[(set SPR:$dst, (fneg (fmul SPR:$a, SPR:$b)))]>;
// Match reassociated forms only if not sign dependent rounding.
def : Pat<(fmul (fneg DPR:$a), DPR:$b),
(FNMULD DPR:$a, DPR:$b)>, Requires<[NoHonorSignDependentRounding]>;
def : Pat<(fmul (fneg SPR:$a), SPR:$b),
(FNMULS SPR:$a, SPR:$b)>, Requires<[NoHonorSignDependentRounding]>;
def FSUBD : ADI<(ops DPR:$dst, DPR:$a, DPR:$b),
"fsubd $dst, $a, $b",
[(set DPR:$dst, (fsub DPR:$a, DPR:$b))]>;