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s390x: Implement kS390_RotLeftAndClear64

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R=joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=
LOG=N

Review-Url: https://chromiumcodereview.appspot.com/2439673005
Cr-Commit-Position: refs/heads/master@{#40485}
This commit is contained in:
bjaideep 2016-10-20 15:55:43 -07:00 committed by Commit bot
parent 820811f582
commit c4c840d45c
1 changed files with 15 additions and 1 deletions
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16
src/compiler/s390/code-generator-s390.cc
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@ -1247,7 +1247,21 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
break;
#if V8_TARGET_ARCH_S390X
case kS390_RotLeftAndClear64:
UNIMPLEMENTED(); // Find correct instruction
if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) {
int shiftAmount = i.InputInt32(1);
int endBit = 63 - shiftAmount;
int startBit = 63 - i.InputInt32(2);
__ risbg(i.OutputRegister(), i.InputRegister(0), Operand(startBit),
Operand(endBit), Operand(shiftAmount), true);
} else {
int shiftAmount = i.InputInt32(1);
int clearBit = 63 - i.InputInt32(2);
__ rllg(i.OutputRegister(), i.InputRegister(0), Operand(shiftAmount));
__ sllg(i.OutputRegister(), i.OutputRegister(), Operand(clearBit));
__ srlg(i.OutputRegister(), i.OutputRegister(),
Operand(clearBit + shiftAmount));
__ sllg(i.OutputRegister(), i.OutputRegister(), Operand(shiftAmount));
}
break;
case kS390_RotLeftAndClearLeft64:
if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) {