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ARM: Decode some media instructions. These are untested.

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This commit is contained in:
Gabe Black 2009-07-01 22:11:54 -07:00
parent b8f064c88c
commit 4f98171479
3 changed files with 57 additions and 0 deletions
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2
src/arch/arm/isa/bitfields.isa
View file

@ -37,6 +37,8 @@
def bitfield ENCODING encoding;
def bitfield OPCODE opcode;
def bitfield OPCODE_24_23 opcode24_23;
def bitfield MEDIA_OPCODE mediaOpcode;
def bitfield MEDIA_OPCODE2 mediaOpcode2;
def bitfield OPCODE_24 opcode24;
def bitfield OPCODE_23_20 opcode23_20;
def bitfield OPCODE_23_21 opcode23_21;

54
src/arch/arm/isa/decoder.isa
View file

@ -566,6 +566,60 @@ format DataOp {
Rn = Rn + Rm_Imm; }},
{{ EA = Rn + Rm_Imm; }});
}
1: decode MEDIA_OPCODE {
0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7: WarnUnimpl::parallel_add_subtract_instructions();
0x8: decode MISC_OPCODE {
0x1, 0x9: WarnUnimpl::pkhbt();
0x7: WarnUnimpl::sxtab16();
0xb: WarnUnimpl::sel();
0x5, 0xd: WarnUnimpl::pkhtb();
0x3: WarnUnimpl::sign_zero_extend_add();
}
0xa, 0xb: decode SHIFT {
0x0, 0x2: WarnUnimpl::ssat();
0x1: WarnUnimpl::ssat16();
}
0xe, 0xf: decode SHIFT {
0x0, 0x2: WarnUnimpl::usat();
0x1: WarnUnimpl::usat16();
}
0x10: decode RN {
0xf: decode MISC_OPCODE {
0x1: WarnUnimpl::smuad();
0x3: WarnUnimpl::smuadx();
0x5: WarnUnimpl::smusd();
0x7: WarnUnimpl::smusdx();
}
default: decode MISC_OPCODE {
0x1: WarnUnimpl::smlad();
0x3: WarnUnimpl::smladx();
0x5: WarnUnimpl::smlsd();
0x7: WarnUnimpl::smlsdx();
}
}
0x14: decode MISC_OPCODE {
0x1: WarnUnimpl::smlald();
0x3: WarnUnimpl::smlaldx();
0x5: WarnUnimpl::smlsld();
0x7: WarnUnimpl::smlsldx();
}
0x15: decode RN {
0xf: decode MISC_OPCODE {
0x1: WarnUnimpl::smmul();
0x3: WarnUnimpl::smmulr();
}
default: decode MISC_OPCODE {
0x1: WarnUnimpl::smmla();
0x3: WarnUnimpl::smmlar();
0xd: WarnUnimpl::smmls();
0xf: WarnUnimpl::smmlsr();
}
}
0x18: decode RN {
0xf: WarnUnimpl::usada8();
default: WarnUnimpl::usad8();
}
}
}
0x4: decode PUSWL {
// Right now we only handle cases when S (PSRUSER) is not set

1
src/arch/arm/types.hh
View file

@ -46,6 +46,7 @@ namespace ArmISA
// All the different types of opcode fields.
Bitfield<27, 25> encoding;
Bitfield<24, 21> opcode;
Bitfield<24, 20> mediaOpcode;
Bitfield<24, 23> opcode24_23;
Bitfield<24> opcode24;
Bitfield<23, 20> opcode23_20;