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X86: Decode three byte opcodes.

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This commit is contained in:
Gabe Black 2009-08-18 00:52:45 -07:00
parent a1ea10d7ba
commit fd45c04cad
5 changed files with 164 additions and 28 deletions
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20
src/arch/x86/isa/decoder/decoder.isa
View file

@ -70,25 +70,7 @@ decode LEGACY_LOCK default Unknown::unknown()
//2 byte opcodes
##include "two_byte_opcodes.isa"
//3 byte opcodes
0x3: decode OPCODE_PREFIXA {
0xF0: decode OPCODE_PREFIXB {
//We don't handle these properly in the predecoder yet, so
//there's no reason to implement them for now.
0x38: decode OPCODE_OP {
default: FailUnimpl::sseThreeEight();
}
0x3A: decode OPCODE_OP {
default: FailUnimpl::sseThreeA();
}
0xF0: decode OPCODE_OP {
default: FailUnimpl::threednow();
}
default: M5InternalError::error(
{{"Unexpected second opcode byte in three byte opcode!"}});
}
default: M5InternalError::error(
{{"Unexpected first opcode byte in three byte opcode!"}});
}
##include "three_byte_opcodes.isa"
}
//Lock prefix
##include "locked_opcodes.isa"

151
src/arch/x86/isa/decoder/three_byte_opcodes.isa Normal file
View file

@ -0,0 +1,151 @@
// Copyright (c) 2008 The Regents of The University of Michigan
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met: redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer;
// redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution;
// neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: Gabe Black
////////////////////////////////////////////////////////////////////
//
// Decode the three byte opcodes
//
0x3: decode OPCODE_PREFIXA {
0x0F: decode OPCODE_PREFIXB {
0x38: decode LEGACY_OP {
format WarnUnimpl {
1: decode OPCODE_OP {
0x00: pshufb_Vdq_Wdq();
0x01: phaddw_Vdq_Wdq();
0x02: phaddd_Vdq_Wdq();
0x03: phaddsw_Vdq_Wdq();
0x04: pmaddubsw_Vdq_Wdq();
0x05: phsubw_Vdq_Wdq();
0x06: phsubd_Vdq_Wdq();
0x07: phsubsw_Vdq_Wdq();
0x08: psignb_Vdq_Wdq();
0x09: psignw_Vdq_Wdq();
0x0A: psignd_Vdq_Wdq();
0x0B: pmulhrsw_Vdq_Wdq();
0x10: pblendvb_Vdq_Wdq();
0x14: blendvps_Vdq_Wdq();
0x15: blendvpd_Vdq_Wdq();
0x17: ptest_Vdq_Wdq();
0x1C: pabsb_Vdq_Wdq();
0x1D: pabsw_Vdq_Wdq();
0x1E: pabsd_Vdq_Wdq();
0x20: pmovsxbw_Vdq_Udq_or_Mq();
0x21: pmovsxbd_Vdq_Udq_or_Md();
0x22: pmovsxbq_Vdq_Udq_or_Mw();
0x23: pmovsxwd_Vdq_Udq_or_Mq();
0x24: pmovsxwq_Vdq_Udq_or_Md();
0x25: pmovsxdq_Vdq_Udq_or_Mq();
0x28: pmuldq_Vdq_Wdq();
0x29: pcmpeqq_Vdq_Wdq();
0x2A: movntdqa_Vdq_Mdq();
0x2B: packusdw_Vdq_Wdq();
0x30: pmovzxbw_Vdq_Udq_or_Mq();
0x31: pmovzxbd_Vdq_Udq_or_Md();
0x32: pmovzxbq_Vdq_Udq_or_Mw();
0x33: pmovzxwd_Vdq_Udq_or_Mq();
0x34: pmovzxwq_Vdq_Udq_or_Md();
0x35: pmovzxdq_Vdq_Udq_or_Mq();
0x37: pcmpgtq_Vdq_Wdq();
0x38: pminsb_Vdq_Wdq();
0x39: pminsd_Vdq_Wdq();
0x3A: pminuw_Vdq_Wdq();
0x3B: pminud_Vdq_Wdq();
0x3C: pmaxsb_Vdq_Wdq();
0x3D: pmaxsd_Vdq_Wdq();
0x3E: pmaxuw_Vdq_Wdq();
0x3F: pmaxud_Vdq_Wdq();
0x40: pmulld_Vdq_Wdq();
0x41: phminposuw_Vdq_Wdq();
default: Inst::UD2();
}
default: decode LEGACY_REPNE {
1: decode OPCODE_OP {
0xF0: crc32_Gd_Eb();
0xF1: crc32_Gd_Ev();
default: Inst::UD2();
}
default: decode OPCODE_OP {
0x00: pshufb_Pq_Qq();
0x01: phaddw_Pq_Qq();
0x02: phaddd_Pq_Qq();
0x03: phaddsw_Pq_Qq();
0x04: pmaddubsw_Pq_Qq();
0x05: phsubw_Pq_Qq();
0x06: phsubd_Pq_Qq();
0x07: phsubsw_Pq_Qq();
0x08: psignb_Pq_Qq();
0x09: psignw_Pq_Qq();
0x0A: psignd_Pq_Qq();
0x0B: pmulhrsw_Pq_Qq();
0x1C: pabsb_Pq_Qq();
0x1D: pabsw_Pq_Qq();
0x1E: pabsd_Pq_Qq();
default: Inst::UD2();
}
}
}
}
0x3A: decode LEGACY_OP {
format WarnUnimpl {
1: decode OPCODE_OP {
0x08: roundps_Vdq_Wdq_Ib();
0x09: roundpd_Vdq_Wdq_Ib();
0x0A: roundss_Vss_Wss_Ib();
0x0B: roundsd_Vsd_Wsd_Ib();
0x0C: blendps_Vdq_Wdq_Ib();
0x0D: blendpd_Vdq_Wdq_Ib();
0x0E: pblendw_Vdq_Wdq_Ib();
0x0F: palignr_Vdq_Wdq_Ib();
0x14: pextrb_Rd_or_Mb_Vdq_Ib();
0x15: decode MODRM_MOD {
0x3: Inst::PEXTRW(Rd,Vdq,Ib);
default: pextrw_Mw_Vdq_Ib();
}
0x16: pextrd_pextrq_Ed_or_Eq_Vdq_Ib();
0x17: extractps_Ed_Vdq_Ib();
0x20: pinsrb_Vdq_Rd_or_Rq_or_Mb_Ib();
0x21: insertps_Vdq_Udq_or_Md_Ib();
0x22: pinsrd_pinsrq_Vdq_Ed_or_Eq_Ib();
0x40: dpps_Vdq_Wdq_Ib();
0x41: dppd_Vdq_Wdq_Ib();
0x42: pcmpistrm_Vdq_Wdq_Ib();
0x43: pcmpistri_Vdq_Wdq_Ib();
default: Inst::UD2();
}
default: decode OPCODE_OP {
0x0F: palignr_Pq_Qq_Ib();
default: Inst::UD2();
}
}
}
default: M5InternalError::error(
{{"Unexpected second opcode byte in three byte opcode!"}});
}
default: M5InternalError::error(
{{"Unexpected first opcode byte in three byte opcode!"}});
}

8
src/arch/x86/isa/decoder/two_byte_opcodes.isa
View file

@ -428,8 +428,12 @@
0x7: getsec();
}
0x07: decode OPCODE_OP_BOTTOM3 {
0x0: three_byte_opcode();
0x2: three_byte_opcode();
0x0: M5InternalError::error(
{{"Three byte opcode shouldn't be handled by "
"two_byte_opcodes.isa!"}});
0x2: M5InternalError::error(
{{"Three byte opcode shouldn't be handled by "
"two_byte_opcodes.isa!"}});
default: UD2();
}
format Inst {

7
src/arch/x86/predecoder.cc
View file

@ -195,7 +195,7 @@ namespace X86ISA
State nextState = ErrorState;
emi.opcode.num++;
//We can't handle 3+ byte opcodes right now
assert(emi.opcode.num < 3);
assert(emi.opcode.num < 4);
consumeByte();
if(emi.opcode.num == 1 && nextByte == 0x0f)
{
@ -203,11 +203,8 @@ namespace X86ISA
DPRINTF(Predecoder, "Found two byte opcode.\n");
emi.opcode.prefixA = nextByte;
}
else if(emi.opcode.num == 2 &&
(nextByte == 0x0f ||
(nextByte & 0xf8) == 0x38))
else if(emi.opcode.num == 2 && (nextByte == 0x38 || nextByte == 0x3F))
{
panic("Three byte opcodes aren't yet supported!\n");
nextState = OpcodeState;
DPRINTF(Predecoder, "Found three byte opcode.\n");
emi.opcode.prefixB = nextByte;

6
src/arch/x86/types.hh
View file

@ -156,8 +156,10 @@ namespace X86ISA
uint8_t num;
//The first byte detected in a 2+ byte opcode. Should be 0xF0.
uint8_t prefixA;
//The second byte detected in a 3+ byte opcode. Could be 0xF0 for
//3dnow instructions, or 0x38-0x3F for some SSE instructions.
//The second byte detected in a 3+ byte opcode. Could be 0x38-0x3F
//for some SSE instructions. 3dNow! instructions are handled as
//two byte opcodes and then split out further by the immediate
//byte.
uint8_t prefixB;
//The main opcode byte. The highest addressed byte in the opcode.
Opcode op;