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ARM: Decode the bfi and bfc instructions.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:08 -05:00
parent a37b6b6bce
commit 7ff24c8777
1 changed files with 13 additions and 6 deletions
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19
src/arch/arm/isa/formats/data.isa
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@ -61,10 +61,12 @@ def format ArmMiscMedia() {{
return new Sbfx(machInst, ra, rn, lsb, msb); return new Sbfx(machInst, ra, rn, lsb, msb);
} }
} else if (bits(op2, 1, 0) == 0x0 && bits(op1, 2, 1) == 0x2) { } else if (bits(op2, 1, 0) == 0x0 && bits(op1, 2, 1) == 0x2) {
const uint32_t lsb = bits(machInst, 11, 7);
const uint32_t msb = bits(machInst, 20, 16);
if (rn == 0xf) { if (rn == 0xf) {
return new WarnUnimplemented("bfc", machInst); return new Bfc(machInst, ra, ra, lsb, msb);
} else { } else {
return new WarnUnimplemented("bfi", machInst); return new Bfi(machInst, ra, rn, lsb, msb);
} }
} }
return new Unknown(machInst); return new Unknown(machInst);
@ -1247,10 +1249,15 @@ def format Thumb32DataProcPlainBin() {{
return new Sbfx(machInst, rd, rn, lsb, msb); return new Sbfx(machInst, rd, rn, lsb, msb);
} }
case 0x16: case 0x16:
if (rn == 0xf) { {
return new WarnUnimplemented("bfc", machInst); const uint32_t lsb = bits(machInst, 7, 6) |
} else { (bits(machInst, 14, 12) << 2);
return new WarnUnimplemented("bfi", machInst); const uint32_t msb = bits(machInst, 4, 0);
if (rn == 0xf) {
return new Bfc(machInst, rd, rd, lsb, msb);
} else {
return new Bfi(machInst, rd, rn, lsb, msb);
}
} }
case 0x1a: case 0x1a:
if (!(bits(machInst, 14, 12) || bits(machInst, 7, 6))) { if (!(bits(machInst, 14, 12) || bits(machInst, 7, 6))) {