sanchayanmaity/gem5
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

ARM: Decode the bfi and bfc instructions.

Browse source
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
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/arch/arm/isa/formats/data.isa
View file

@ -61,10 +61,12 @@ def format ArmMiscMedia() {{
return new Sbfx(machInst, ra, rn, lsb, msb);
}
} 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) {
return new WarnUnimplemented("bfc", machInst);
return new Bfc(machInst, ra, ra, lsb, msb);
} else {
return new WarnUnimplemented("bfi", machInst);
return new Bfi(machInst, ra, rn, lsb, msb);
}
}
return new Unknown(machInst);
@ -1247,10 +1249,15 @@ def format Thumb32DataProcPlainBin() {{
return new Sbfx(machInst, rd, rn, lsb, msb);
}
case 0x16:
if (rn == 0xf) {
return new WarnUnimplemented("bfc", machInst);
} else {
return new WarnUnimplemented("bfi", machInst);
{
const uint32_t lsb = bits(machInst, 7, 6) |
(bits(machInst, 14, 12) << 2);
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:
if (!(bits(machInst, 14, 12) || bits(machInst, 7, 6))) {