1// -*- mode:c++ -*-
2
3// Copyright (c) 2010 ARM Limited
4// All rights reserved
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating

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39
40let {{
41
42 header_output = ""
43 decoder_output = ""
44 exec_output = ""
45
46 calcGECode = '''
47 CondCodes = insertBits(CondCodes, 19, 16, resTemp);
48 '''
49
50 calcQCode = '''
51 CondCodes = CondCodes | ((resTemp & 1) << 27);
52 '''
53
54 calcCcCode = '''
55 uint16_t _ic, _iv, _iz, _in;
56 _in = (resTemp >> %(negBit)d) & 1;
57 _iz = (resTemp == 0);
58 _iv = %(ivValue)s & 1;
59 _ic = %(icValue)s & 1;
60
61 CondCodes = _in << 31 | _iz << 30 | _ic << 29 | _iv << 28 |
62 (CondCodes & 0x0FFFFFFF);
63
64 DPRINTF(Arm, "(in, iz, ic, iv) = (%%d, %%d, %%d, %%d)\\n",
65 _in, _iz, _ic, _iv);
66 '''
67
68 # Dict of code to set the carry flag. (imm, reg, reg-reg)
69 oldC = 'CondCodes<29:>'
70 oldV = 'CondCodes<28:>'
71 carryCode = {
72 "none": (oldC, oldC, oldC),
73 "llbit": (oldC, oldC, oldC),
74 "saturate": ('0', '0', '0'),
75 "overflow": ('0', '0', '0'),
76 "ge": ('0', '0', '0'),
77 "add": ('findCarry(32, resTemp, Op1, secondOp)',
78 'findCarry(32, resTemp, Op1, secondOp)',

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97 "add": 'findOverflow(32, resTemp, Op1, secondOp)',
98 "sub": 'findOverflow(32, resTemp, Op1, ~secondOp)',
99 "rsb": 'findOverflow(32, resTemp, secondOp, ~Op1)',
100 "logic": oldV
101 }
102
103 secondOpRe = re.compile("secondOp")
104 immOp2 = "imm"
105 regOp2 = "shift_rm_imm(Op2, shiftAmt, shiftType, CondCodes<29:>)"
106 regRegOp2 = "shift_rm_rs(Op2, Shift<7:0>, shiftType, CondCodes<29:>)"
107
108 def buildImmDataInst(mnem, code, flagType = "logic", suffix = "Imm", \
109 buildCc = True, buildNonCc = True, instFlags = []):
110 cCode = carryCode[flagType]
111 vCode = overflowCode[flagType]
112 negBit = 31
113 if flagType == "llbit":
114 negBit = 63

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235 buildImmDataInst(mnem, instCode, flagType)
236 buildRegDataInst(mnem, instCode, flagType,
237 isRasPop = isRasPop, isBranch = isBranch)
238 buildRegRegDataInst(mnem, regRegCode, flagType)
239 if subsPcLr:
240 code += '''
241 SCTLR sctlr = Sctlr;
242 uint32_t newCpsr =
243 cpsrWriteByInstr(Cpsr | CondCodes, Spsr, 0xF, true, sctlr.nmfi);
244 Cpsr = ~CondCodesMask & newCpsr;
245 CondCodes = CondCodesMask & newCpsr;
246 NextThumb = ((CPSR)newCpsr).t;
247 NextJazelle = ((CPSR)newCpsr).j;
248 NextItState = ((((CPSR)newCpsr).it2 << 2) & 0xFC)
249 | (((CPSR)newCpsr).it1 & 0x3);
250 SevMailbox = 1;
251 '''
252 buildImmDataInst(mnem + 's', code, flagType,
253 suffix = "ImmPclr", buildCc = False,

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