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ARM: Decode miscellaneous arm mode media instructions.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:08 -05:00
parent 09cc401848
commit 2e717558e2
2 changed files with 27 additions and 10 deletions
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4
src/arch/arm/isa/decoder/arm.isa
View file

@ -114,9 +114,7 @@ format DataOp {
0x0: ArmParallelAddSubtract::armParallelAddSubtract();
0x1: ArmPackUnpackSatReverse::armPackUnpackSatReverse();
0x2: ArmSignedMultiplies::armSignedMultiplies();
0x3: decode MEDIA_OPCODE {
0x18: ArmUsad::armUsad();
}
0x3: ArmMiscMedia::armMiscMedia();
}
}
0x4: ArmMacroMem::armMacroMem();

33
src/arch/arm/isa/formats/data.isa
View file

@ -35,18 +35,37 @@
//
// Authors: Gabe Black
def format ArmUsad() {{
def format ArmMiscMedia() {{
decode_block = '''
{
const IntRegIndex rd = (IntRegIndex)(uint32_t)bits(machInst, 19, 16);
const uint32_t op1 = bits(machInst, 22, 20);
const uint32_t op2 = bits(machInst, 7, 5);
const IntRegIndex rn = (IntRegIndex)(uint32_t)bits(machInst, 3, 0);
const IntRegIndex rm = (IntRegIndex)(uint32_t)bits(machInst, 11, 8);
const IntRegIndex ra = (IntRegIndex)(uint32_t)bits(machInst, 15, 12);
if (ra == 0xf) {
return new Usad8(machInst, rd, rn, rm);
} else {
return new Usada8(machInst, rd, rn, rm, ra);
if (op1 == 0 && op2 == 0) {
const IntRegIndex rd =
(IntRegIndex)(uint32_t)bits(machInst, 19, 16);
const IntRegIndex rm =
(IntRegIndex)(uint32_t)bits(machInst, 11, 8);
if (ra == 0xf) {
return new Usad8(machInst, rd, rn, rm);
} else {
return new Usada8(machInst, rd, rn, rm, ra);
}
} else if (bits(op2, 1, 0) == 0x2) {
if (bits(op1, 2, 1) == 0x3) {
return new WarnUnimplemented("ubfx", machInst);
} else if (bits(op1, 2, 1) == 0x1) {
return new WarnUnimplemented("sbfx", machInst);
}
} else if (bits(op2, 1, 0) == 0x0 && bits(op1, 2, 1) == 0x2) {
if (rn == 0xf) {
return new WarnUnimplemented("bfc", machInst);
} else {
return new WarnUnimplemented("bfi", machInst);
}
}
return new Unknown(machInst);
}
'''
}};