diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/arch/arm/isa/insts/data.isa | 81 |
1 files changed, 46 insertions, 35 deletions
diff --git a/src/arch/arm/isa/insts/data.isa b/src/arch/arm/isa/insts/data.isa index 41722914a..09f9621f1 100644 --- a/src/arch/arm/isa/insts/data.isa +++ b/src/arch/arm/isa/insts/data.isa @@ -51,27 +51,36 @@ let {{ CpsrQ = (resTemp & 1) << 27; ''' - calcCcCode = ''' - uint16_t _ic, _iv, _iz, _in; - _in = (resTemp >> %(negBit)d) & 1; - _iz = (resTemp == 0); - _iv = %(ivValue)s & 1; - _ic = %(icValue)s & 1; - - CondCodesNZ = (_in << 1) | _iz; - CondCodesC = _ic; - CondCodesV = _iv; - - DPRINTF(Arm, "(in, iz, ic, iv) = (%%d, %%d, %%d, %%d)\\n", - _in, _iz, _ic, _iv); - ''' + def createCcCode(negBit, carry, overflow): + code = "" + code += ''' + uint16_t _iz, _in; + _in = (resTemp >> %d) & 1; + _iz = (resTemp == 0); + CondCodesNZ = (_in << 1) | _iz; + DPRINTF(Arm, "(in, iz) = (%%d, %%d)\\n", _in, _iz); + ''' % negBit + if overflow and overflow != "none": + code += ''' + uint16_t _iv; + _iv = %s & 1; + CondCodesV = _iv; + DPRINTF(Arm, "(iv) = (%%d)\\n", _iv); + ''' % overflow + if carry and carry != "none": + code += ''' + uint16_t _ic; + _ic = %s & 1; + CondCodesC = _ic; + DPRINTF(Arm, "(ic) = (%%d)\\n", _ic); + ''' % carry + return code # Dict of code to set the carry flag. (imm, reg, reg-reg) oldC = 'CondCodesC' - oldV = 'CondCodesV' carryCode = { - "none": (oldC, oldC, oldC), - "llbit": (oldC, oldC, oldC), + "none": ("none", "none", "none"), + "llbit": ("none", "none", "none"), "saturate": ('0', '0', '0'), "overflow": ('0', '0', '0'), "ge": ('0', '0', '0'), @@ -90,15 +99,15 @@ let {{ } # Dict of code to set the overflow flag. overflowCode = { - "none": oldV, - "llbit": oldV, + "none": "none", + "llbit": "none", "saturate": '0', "overflow": '0', "ge": '0', "add": 'findOverflow(32, resTemp, Op1, secondOp)', "sub": 'findOverflow(32, resTemp, Op1, ~secondOp)', "rsb": 'findOverflow(32, resTemp, secondOp, ~Op1)', - "logic": oldV + "logic": "none" } secondOpRe = re.compile("secondOp") @@ -118,11 +127,9 @@ let {{ elif flagType == "ge": immCcCode = calcGECode else: - immCcCode = calcCcCode % { - "icValue": secondOpRe.sub(immOp2, cCode[0]), - "ivValue": secondOpRe.sub(immOp2, vCode), - "negBit": negBit - } + immCcCode = createCcCode(negBit, secondOpRe.sub(immOp2, cCode[0]), + secondOpRe.sub(immOp2, vCode)) + immCode = secondOpRe.sub(immOp2, code) immIop = InstObjParams(mnem, mnem.capitalize() + suffix, "DataImmOp", {"code" : immCode, @@ -149,6 +156,7 @@ let {{ cCode = carryCode[flagType] vCode = overflowCode[flagType] negBit = 31 + regCcCode = "" if flagType == "llbit": negBit = 63 if flagType == "saturate": @@ -156,12 +164,16 @@ let {{ elif flagType == "ge": regCcCode = calcGECode else: - regCcCode = calcCcCode % { - "icValue": secondOpRe.sub(regOp2, cCode[1]), - "ivValue": secondOpRe.sub(regOp2, vCode), - "negBit": negBit - } + regCcCode = createCcCode(negBit,secondOpRe.sub(regOp2, cCode[1]), + secondOpRe.sub(regOp2, vCode)) + regCode = secondOpRe.sub(regOp2, code) + + # If we end up needing CondCodesC then remove any trace of the OptShift + if re.search('(?<!OptShiftRm)CondCodesC(?!.*=)', regCode + regCcCode): + regCode = re.sub('OptShiftRmCondCodesC', 'CondCodesC', regCode) + regCcCode = re.sub('OptShiftRmCondCodesC', 'CondCodesC', regCcCode) + regIop = InstObjParams(mnem, mnem.capitalize() + suffix, "DataRegOp", {"code" : regCode, "is_ras_pop" : isRasPop, "is_branch" : isBranch, @@ -197,11 +209,10 @@ let {{ elif flagType == "ge": regRegCcCode = calcGECode else: - regRegCcCode = calcCcCode % { - "icValue": secondOpRe.sub(regRegOp2, cCode[2]), - "ivValue": secondOpRe.sub(regRegOp2, vCode), - "negBit": negBit - } + regRegCcCode = createCcCode(negBit, + secondOpRe.sub(regRegOp2, cCode[2]), + secondOpRe.sub(regRegOp2, vCode)) + regRegCode = secondOpRe.sub(regRegOp2, code) regRegIop = InstObjParams(mnem, mnem.capitalize() + suffix, "DataRegRegOp", |