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ARM: Decode the thumb version of the ldrd and strd instructions.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:09 -05:00
parent 9d4a1bf2ba
commit 61a5e71be7
1 changed files with 52 additions and 6 deletions
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58
src/arch/arm/isa/formats/mem.isa
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@ -263,8 +263,8 @@ def format Thumb32LdrStrDExTbh() {{
const uint32_t op3 = bits(machInst, 7, 4);
const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 19, 16);
const IntRegIndex rt = (IntRegIndex)(uint32_t)bits(machInst, 15, 12);
/* This isn't used yet, and that makes gcc upset. */
//const IntRegIndex rt2 = (IntRegIndex)(uint32_t)bits(machInst, 11, 8);
const IntRegIndex rt2 = (IntRegIndex)(uint32_t)bits(machInst, 11, 8);
const uint32_t imm8 = bits(machInst, 7, 0);
if (bits(op1, 1) == 0 && bits(op2, 1) == 0) {
if (op1 == 0) {
const uint32_t imm = bits(machInst, 7, 0) << 2;
@ -296,24 +296,70 @@ def format Thumb32LdrStrDExTbh() {{
case 0x5:
return new %(ldrexh)s(machInst, rt, rn, true, 0);
case 0x7:
return new WarnUnimplemented("ldrexd", machInst);
return new %(ldrexd)s(machInst, rt, rt2, rn, true, 0);
default:
return new Unknown(machInst);
}
}
}
} else {
const uint32_t puw = (bits(machInst, 24, 23) << 1) |
bits(machInst, 21);
const uint32_t dimm = imm8 << 2;
if (bits(op2, 0) == 0) {
return new WarnUnimplemented("strd", machInst);
switch (puw) {
case 0x1:
return new %(strd_w)s(machInst, rt, rt2, rn, false, dimm);
case 0x3:
return new %(strd_uw)s(machInst, rt, rt2, rn, true, dimm);
case 0x4:
return new %(strd_p)s(machInst, rt, rt2, rn, false, dimm);
case 0x5:
return new %(strd_pw)s(machInst, rt, rt2, rn, false, dimm);
case 0x6:
return new %(strd_pu)s(machInst, rt, rt2, rn, true, dimm);
case 0x7:
return new %(strd_puw)s(machInst, rt, rt2, rn, true, dimm);
default:
return new Unknown(machInst);
}
} else {
return new WarnUnimplemented("ldrd", machInst);
switch (puw) {
case 0x1:
return new %(ldrd_w)s(machInst, rt, rt2, rn, false, dimm);
case 0x3:
return new %(ldrd_uw)s(machInst, rt, rt2, rn, true, dimm);
case 0x4:
return new %(ldrd_p)s(machInst, rt, rt2, rn, false, dimm);
case 0x5:
return new %(ldrd_pw)s(machInst, rt, rt2, rn, false, dimm);
case 0x6:
return new %(ldrd_pu)s(machInst, rt, rt2, rn, true, dimm);
case 0x7:
return new %(ldrd_puw)s(machInst, rt, rt2, rn, true, dimm);
default:
return new Unknown(machInst);
}
}
}
}
''' % {
"ldrex" : "LDREX_" + loadImmClassName(False, True, False, size=4),
"ldrexb" : "LDREXB_" + loadImmClassName(False, True, False, size=1),
"ldrexh" : "LDREXH_" + loadImmClassName(False, True, False, size=2)
"ldrexh" : "LDREXH_" + loadImmClassName(False, True, False, size=2),
"ldrexd" : "LDREXD_" + loadDoubleImmClassName(False, True, False),
"ldrd_w" : loadDoubleImmClassName(True, False, True),
"ldrd_uw" : loadDoubleImmClassName(True, True, True),
"ldrd_p" : loadDoubleImmClassName(False, False, False),
"ldrd_pw" : loadDoubleImmClassName(False, False, True),
"ldrd_pu" : loadDoubleImmClassName(False, True, False),
"ldrd_puw" : loadDoubleImmClassName(False, True, True),
"strd_w" : storeDoubleImmClassName(True, False, True),
"strd_uw" : storeDoubleImmClassName(True, True, True),
"strd_p" : storeDoubleImmClassName(False, False, False),
"strd_pw" : storeDoubleImmClassName(False, False, True),
"strd_pu" : storeDoubleImmClassName(False, True, False),
"strd_puw" : storeDoubleImmClassName(False, True, True)
}
}};