X86: Decode three byte opcodes.

diff --git a/src/arch/x86/isa/decoder/decoder.isa b/src/arch/x86/isa/decoder/decoder.isa
index dcf6ce0897f63fd26eea14ac26c78861b6d98137..f757abef959c2af0d783f8e0714c54e622471302 100644 (file)
--- 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 (file)
index 0000000..7587e3d
--- /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 213e5726457c420465b86bb88cb22e4519516cbd..b181770cc3ea316e9f2f4b01f698c7a57ef47543 100644 (file)
--- 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 f537f92af8487a00823ec2ec94fd6826ec52d7f4..026b733bdb54987631900ee3b85494c6fafff73d 100644 (file)
--- 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 956ec32168d3274c2f9c81e9c1d3ea70fa5f24c2..6fd36b487d80f2b8c9be736446464a235bde22b3 100644 (file)
--- 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;