From 7309d5ee45a7f6e71693c4f2582468eb591fc16a Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sun, 29 Jul 2007 13:51:40 -0700 Subject: X86: Make logic instructions flag setting work. The instructions now ask for the appropriate flags to be set, and the microops do the "right thing" with the CF and OF flags, namely zero them. --HG-- extra : convert_revision : 85138a832f44c879bf8a11bd3a35b58be6272ef3 --- src/arch/x86/isa/insts/logical.py | 48 +++++++++++++++--------------- src/arch/x86/isa/microops/regop.isa | 59 ++++++++++++++++++++++++------------- 2 files changed, 62 insertions(+), 45 deletions(-) (limited to 'src/arch/x86/isa') diff --git a/src/arch/x86/isa/insts/logical.py b/src/arch/x86/isa/insts/logical.py index bbc15f8fa..81a4730de 100644 --- a/src/arch/x86/isa/insts/logical.py +++ b/src/arch/x86/isa/insts/logical.py @@ -56,14 +56,14 @@ microcode = ''' def macroop OR_R_R { - or reg, reg, regm + or reg, reg, regm, flags=(OF,SF,ZF,PF,CF) }; def macroop OR_M_I { limm t2, imm ld t1, ds, [scale, index, base], disp - or t1, t1, t2 + or t1, t1, t2, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; @@ -72,14 +72,14 @@ def macroop OR_P_I limm t2, imm rdip t7 ld t1, ds, [0, t0, t7], disp - or t1, t1, t2 + or t1, t1, t2, flags=(OF,SF,ZF,PF,CF) st t1, ds, [0, t0, t7], disp }; def macroop OR_M_R { ld t1, ds, [scale, index, base], disp - or t1, t1, reg + or t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; @@ -87,45 +87,45 @@ def macroop OR_P_R { rdip t7 ld t1, ds, [0, t0, t7], disp - or t1, t1, reg + or t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [0, t0, t7], disp }; def macroop OR_R_M { ld t1, ds, [scale, index, base], disp - or reg, reg, t1 + or reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop OR_R_P { rdip t7 ld t1, ds, [0, t0, t7], disp - or reg, reg, t1 + or reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop OR_R_I { limm t1, imm - or reg, reg, t1 + or reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop XOR_R_R { - xor reg, reg, regm + xor reg, reg, regm, flags=(OF,SF,ZF,PF,CF) }; def macroop XOR_R_I { limm t1, imm - xor reg, reg, t1 + xor reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop XOR_M_I { limm t2, imm ld t1, ds, [scale, index, base], disp - xor t1, t1, t2 + xor t1, t1, t2, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; @@ -134,14 +134,14 @@ def macroop XOR_P_I limm t2, imm rdip t7 ld t1, ds, [scale, index, base], disp - xor t1, t1, t2 + xor t1, t1, t2, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; def macroop XOR_M_R { ld t1, ds, [scale, index, base], disp - xor t1, t1, reg + xor t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; @@ -149,52 +149,52 @@ def macroop XOR_P_R { rdip t7 ld t1, ds, [scale, index, base], disp - xor t1, t1, reg + xor t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; def macroop XOR_R_M { ld t1, ds, [scale, index, base], disp - xor reg, reg, t1 + xor reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop XOR_R_P { rdip t7 ld t1, ds, [scale, index, base], disp - xor reg, reg, t1 + xor reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop AND_R_R { - and reg, reg, regm + and reg, reg, regm, flags=(OF,SF,ZF,PF,CF) }; def macroop AND_R_M { ld t1, ds, [scale, index, base], disp - and reg, reg, t1 + and reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop AND_R_P { rdip t7 ld t1, ds, [scale, index, base], disp - and reg, reg, t1 + and reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop AND_R_I { limm t1, imm - and reg, reg, t1 + and reg, reg, t1, flags=(OF,SF,ZF,PF,CF) }; def macroop AND_M_I { ld t2, ds, [scale, index, base], disp limm t1, imm - and t2, t2, t1 + and t2, t2, t1, flags=(OF,SF,ZF,PF,CF) st t2, ds, [scale, index, base], disp }; @@ -203,14 +203,14 @@ def macroop AND_P_I rdip t7 ld t2, ds, [scale, index, base], disp limm t1, imm - and t2, t2, t1 + and t2, t2, t1, flags=(OF,SF,ZF,PF,CF) st t2, ds, [scale, index, base], disp }; def macroop AND_M_R { ld t1, ds, [scale, index, base], disp - and t1, t1, reg + and t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; @@ -218,7 +218,7 @@ def macroop AND_P_R { rdip t7 ld t1, ds, [scale, index, base], disp - and t1, t1, reg + and t1, t1, reg, flags=(OF,SF,ZF,PF,CF) st t1, ds, [scale, index, base], disp }; diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa index bb34df7df..af3ee869b 100644 --- a/src/arch/x86/isa/microops/regop.isa +++ b/src/arch/x86/isa/microops/regop.isa @@ -326,12 +326,24 @@ let {{ checkCCFlagBits = "checkCondition(ccFlagBits)" - genCCFlagBits = "ccFlagBits = genFlags(ccFlagBits, ext, DestReg, SrcReg1, %s);" + genCCFlagBits = \ + "ccFlagBits = genFlags(ccFlagBits, ext, DestReg, SrcReg1, op2);" + genCCFlagBitsSub = \ + "ccFlagBits = genFlags(ccFlagBits, ext, DestReg, SrcReg1, ~op2, true);" + genCCFlagBitsLogic = ''' + //Don't have genFlags handle the OF or CF bits + uint64_t mask = CFBit | OFBit; + ccFlagBits = genFlags(ccFlagBits, ext & ~mask, DestReg, SrcReg1, op2); + //If a logic microop wants to set these, it wants to set them to 0. + ccFlagBits &= ~(CFBit & ext); + ccFlagBits &= ~(OFBit & ext); + ''' # This creates a python representations of a microop which are a cross # product of reg/immediate and flag/no flag versions. - def defineMicroRegOp(mnemonic, code, subtract = False, cc=False, elseCode=";"): + def defineMicroRegOp(mnemonic, code, flagCode=genCCFlagBits, \ + cc=False, elseCode=";"): Name = mnemonic name = mnemonic.lower() @@ -342,13 +354,7 @@ let {{ regCode = matcher.sub("SrcReg2", code) immCode = matcher.sub("imm8", code) - if subtract: - secondSrc = "~op2, true" - else: - secondSrc = "op2" - if not cc: - flagCode = genCCFlagBits % secondSrc condCode = "true" else: flagCode = "" @@ -360,26 +366,30 @@ let {{ class RegOpChild(RegOp): mnemonic = name className = Name - def __init__(self, dest, src1, src2, flags=None, dataSize="env.dataSize"): - super(RegOpChild, self).__init__(dest, src1, src2, flags, dataSize) + def __init__(self, dest, src1, src2, \ + flags=None, dataSize="env.dataSize"): + super(RegOpChild, self).__init__(dest, src1, src2, \ + flags, dataSize) microopClasses[name] = RegOpChild setUpMicroRegOp(name, Name, "X86ISA::RegOp", regCode); setUpMicroRegOp(name, Name + "Flags", "X86ISA::RegOp", regCode, - flagCode = regFlagCode, condCheck = condCode, elseCode = elseCode); + flagCode=regFlagCode, condCheck=condCode, elseCode=elseCode); class RegOpChildImm(RegOpImm): mnemonic = name + 'i' className = Name + 'Imm' - def __init__(self, dest, src1, src2, flags=None, dataSize="env.dataSize"): - super(RegOpChildImm, self).__init__(dest, src1, src2, flags, dataSize) + def __init__(self, dest, src1, src2, \ + flags=None, dataSize="env.dataSize"): + super(RegOpChildImm, self).__init__(dest, src1, src2, \ + flags, dataSize) microopClasses[name + 'i'] = RegOpChildImm setUpMicroRegOp(name + "i", Name + "Imm", "X86ISA::RegOpImm", immCode); setUpMicroRegOp(name + "i", Name + "ImmFlags", "X86ISA::RegOpImm", immCode, - flagCode = immFlagCode, condCheck = condCode, elseCode = elseCode); + flagCode=immFlagCode, condCheck=condCode, elseCode=elseCode); # This has it's own function because Wr ops have implicit destinations def defineMicroRegOpWr(mnemonic, code, elseCode=";"): @@ -447,7 +457,8 @@ let {{ setUpMicroRegOp(name, Name, "X86ISA::RegOpImm", code); defineMicroRegOp('Add', 'DestReg = merge(DestReg, SrcReg1 + op2, dataSize)') - defineMicroRegOp('Or', 'DestReg = merge(DestReg, SrcReg1 | op2, dataSize)') + defineMicroRegOp('Or', 'DestReg = merge(DestReg, SrcReg1 | op2, dataSize)', + flagCode = genCCFlagBitsLogic) defineMicroRegOp('Adc', ''' CCFlagBits flags = ccFlagBits; DestReg = merge(DestReg, SrcReg1 + op2 + flags.CF, dataSize); @@ -455,12 +466,18 @@ let {{ defineMicroRegOp('Sbb', ''' CCFlagBits flags = ccFlagBits; DestReg = merge(DestReg, SrcReg1 - op2 - flags.CF, dataSize); - ''', True) - defineMicroRegOp('And', 'DestReg = merge(DestReg, SrcReg1 & op2, dataSize)') - defineMicroRegOp('Sub', 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)', True) - defineMicroRegOp('Xor', 'DestReg = merge(DestReg, SrcReg1 ^ op2, dataSize)') - # defineMicroRegOp('Cmp', 'DestReg = merge(DestReg, DestReg - op2, dataSize)', True) - defineMicroRegOp('Mul1s', 'DestReg = merge(DestReg, DestReg * op2, dataSize)') + ''', flagCode = genCCFlagBitsSub) + defineMicroRegOp('And', \ + 'DestReg = merge(DestReg, SrcReg1 & op2, dataSize)', \ + flagCode = genCCFlagBitsLogic) + defineMicroRegOp('Sub', \ + 'DestReg = merge(DestReg, SrcReg1 - op2, dataSize)', \ + flagCode = genCCFlagBitsSub) + defineMicroRegOp('Xor', \ + 'DestReg = merge(DestReg, SrcReg1 ^ op2, dataSize)', \ + flagCode = genCCFlagBitsLogic) + defineMicroRegOp('Mul1s', \ + 'DestReg = merge(DestReg, DestReg * op2, dataSize)') defineMicroRegOp('Mov', 'DestReg = merge(SrcReg1, op2, dataSize)', elseCode='DestReg=DestReg;', cc=True) -- cgit v1.2.3