summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/arch/x86/isa/decoder/decoder.isa20
-rw-r--r--src/arch/x86/isa/decoder/three_byte_opcodes.isa151
-rw-r--r--src/arch/x86/isa/decoder/two_byte_opcodes.isa8
-rw-r--r--src/arch/x86/predecoder.cc7
-rw-r--r--src/arch/x86/types.hh6
5 files changed, 164 insertions, 28 deletions
diff --git a/src/arch/x86/isa/decoder/decoder.isa b/src/arch/x86/isa/decoder/decoder.isa
index dcf6ce089..f757abef9 100644
--- a/src/arch/x86/isa/decoder/decoder.isa
+++ b/src/arch/x86/isa/decoder/decoder.isa
@@ -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"
diff --git a/src/arch/x86/isa/decoder/three_byte_opcodes.isa b/src/arch/x86/isa/decoder/three_byte_opcodes.isa
new file mode 100644
index 000000000..7587e3dad
--- /dev/null
+++ b/src/arch/x86/isa/decoder/three_byte_opcodes.isa
@@ -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!"}});
+}
diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
index 213e57264..b181770cc 100644
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
@@ -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 {
diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc
index f537f92af..026b733bd 100644
--- a/src/arch/x86/predecoder.cc
+++ b/src/arch/x86/predecoder.cc
@@ -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;
diff --git a/src/arch/x86/types.hh b/src/arch/x86/types.hh
index 956ec3216..6fd36b487 100644
--- a/src/arch/x86/types.hh
+++ b/src/arch/x86/types.hh
@@ -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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 12:35:54 +0000