decoder.isa (7720:65d338a8dba4) decoder.isa (7792:8ac74e34c6f4)
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 MIPS Technologies, Inc.
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright

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128 0x1: decode FUNCTION_LO {
129 //Table A-3 Note: "Specific encodings of the hint field are
130 //used to distinguish JR from JR.HB and JALR from JALR.HB"
131 format Jump {
132 0x0: decode HINT {
133 0x1: jr_hb({{
134 Config1Reg config1 = Config1;
135 if (config1.ca == 0) {
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 MIPS Technologies, Inc.
4// All rights reserved.
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met: redistributions of source code must retain the above copyright

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128 0x1: decode FUNCTION_LO {
129 //Table A-3 Note: "Specific encodings of the hint field are
130 //used to distinguish JR from JR.HB and JALR from JALR.HB"
131 format Jump {
132 0x0: decode HINT {
133 0x1: jr_hb({{
134 Config1Reg config1 = Config1;
135 if (config1.ca == 0) {
136 pc.nnpc(Rs);
136 NNPC = Rs;
137 } else {
138 panic("MIPS16e not supported\n");
139 }
137 } else {
138 panic("MIPS16e not supported\n");
139 }
140 PCS = pc;
141 }}, IsReturn, ClearHazards);
142 default: jr({{
143 Config1Reg config1 = Config1;
144 if (config1.ca == 0) {
140 }}, IsReturn, ClearHazards);
141 default: jr({{
142 Config1Reg config1 = Config1;
143 if (config1.ca == 0) {
145 pc.nnpc(Rs);
144 NNPC = Rs;
146 } else {
147 panic("MIPS16e not supported\n");
148 }
145 } else {
146 panic("MIPS16e not supported\n");
147 }
149 PCS = pc;
150 }}, IsReturn);
151 }
152
153 0x1: decode HINT {
154 0x1: jalr_hb({{
148 }}, IsReturn);
149 }
150
151 0x1: decode HINT {
152 0x1: jalr_hb({{
155 Rd = pc.nnpc();
156 pc.nnpc(Rs);
157 PCS = pc;
153 Rd = NNPC;
154 NNPC = Rs;
158 }}, IsCall, ClearHazards);
159 default: jalr({{
155 }}, IsCall, ClearHazards);
156 default: jalr({{
160 Rd = pc.nnpc();
161 pc.nnpc(Rs);
162 PCS = pc;
157 Rd = NNPC;
158 NNPC = Rs;
163 }}, IsCall);
164 }
165 }
166
167 format BasicOp {
168 0x2: movz({{ Rd = (Rt == 0) ? Rs : Rd; }});
169 0x3: movn({{ Rd = (Rt != 0) ? Rs : Rd; }});
170#if FULL_SYSTEM

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327 0x4: DspBranch::bposge32({{ cond = (dspctl<5:0> >= 32); }});
328 format WarnUnimpl {
329 0x7: synci();
330 }
331 }
332 }
333
334 format Jump {
159 }}, IsCall);
160 }
161 }
162
163 format BasicOp {
164 0x2: movz({{ Rd = (Rt == 0) ? Rs : Rd; }});
165 0x3: movn({{ Rd = (Rt != 0) ? Rs : Rd; }});
166#if FULL_SYSTEM

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323 0x4: DspBranch::bposge32({{ cond = (dspctl<5:0> >= 32); }});
324 format WarnUnimpl {
325 0x7: synci();
326 }
327 }
328 }
329
330 format Jump {
335 0x2: j({{
336 pc.nnpc((pc.npc() & 0xF0000000) | (JMPTARG << 2));
337 PCS = pc;
338 }});
339 0x3: jal({{
340 pc.nnpc((pc.npc() & 0xF0000000) | (JMPTARG << 2));
341 PCS = pc;
342 }}, IsCall, Link);
331 0x2: j({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2); }});
332 0x3: jal({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2); }},
333 IsCall, Link);
343 }
344
345 format Branch {
346 0x4: decode RS_RT {
347 0x0: b({{ cond = 1; }});
348 default: beq({{ cond = (Rs.sw == Rt.sw); }});
349 }
350 0x5: bne({{ cond = (Rs.sw != Rt.sw); }});

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703 //Table A-12 MIPS32 COP0 Encoding of Function Field When rs=CO
704 0x1: decode FUNCTION {
705 format CP0Control {
706 0x18: eret({{
707 StatusReg status = Status;
708 ConfigReg config = Config;
709 SRSCtlReg srsCtl = SRSCtl;
710 DPRINTF(MipsPRA,"Restoring PC - %x\n",EPC);
334 }
335
336 format Branch {
337 0x4: decode RS_RT {
338 0x0: b({{ cond = 1; }});
339 default: beq({{ cond = (Rs.sw == Rt.sw); }});
340 }
341 0x5: bne({{ cond = (Rs.sw != Rt.sw); }});

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694 //Table A-12 MIPS32 COP0 Encoding of Function Field When rs=CO
695 0x1: decode FUNCTION {
696 format CP0Control {
697 0x18: eret({{
698 StatusReg status = Status;
699 ConfigReg config = Config;
700 SRSCtlReg srsCtl = SRSCtl;
701 DPRINTF(MipsPRA,"Restoring PC - %x\n",EPC);
711 MipsISA::PCState pc = PCS;
712 if (status.erl == 1) {
713 status.erl = 0;
702 if (status.erl == 1) {
703 status.erl = 0;
714 pc.npc(ErrorEPC);
704 NPC = ErrorEPC;
715 // Need to adjust NNPC, otherwise things break
705 // Need to adjust NNPC, otherwise things break
716 pc.nnpc(ErrorEPC + sizeof(MachInst));
706 NNPC = ErrorEPC + sizeof(MachInst);
717 } else {
707 } else {
718 pc.npc(EPC);
708 NPC = EPC;
719 // Need to adjust NNPC, otherwise things break
709 // Need to adjust NNPC, otherwise things break
720 pc.nnpc(EPC + sizeof(MachInst));
710 NNPC = EPC + sizeof(MachInst);
721 status.exl = 0;
722 if (config.ar >=1 &&
723 srsCtl.hss > 0 &&
724 status.bev == 0) {
725 srsCtl.css = srsCtl.pss;
726 //xc->setShadowSet(srsCtl.pss);
727 }
728 }
711 status.exl = 0;
712 if (config.ar >=1 &&
713 srsCtl.hss > 0 &&
714 status.bev == 0) {
715 srsCtl.css = srsCtl.pss;
716 //xc->setShadowSet(srsCtl.pss);
717 }
718 }
729 PCS = pc;
730 LLFlag = 0;
731 Status = status;
732 SRSCtl = srsCtl;
733 }}, IsReturn, IsSerializing, IsERET);
734
735 0x1F: deret({{
736 DebugReg debug = Debug;
719 LLFlag = 0;
720 Status = status;
721 SRSCtl = srsCtl;
722 }}, IsReturn, IsSerializing, IsERET);
723
724 0x1F: deret({{
725 DebugReg debug = Debug;
737 MipsISA::PCState pc = PCS;
738 if (debug.dm == 1) {
739 debug.dm = 1;
740 debug.iexi = 0;
726 if (debug.dm == 1) {
727 debug.dm = 1;
728 debug.iexi = 0;
741 pc.npc(DEPC);
729 NPC = DEPC;
742 } else {
730 } else {
731 NPC = NPC;
743 // Undefined;
744 }
732 // Undefined;
733 }
745 PCS = pc;
746 Debug = debug;
747 }}, IsReturn, IsSerializing, IsERET);
748 }
749 format CP0TLB {
750 0x01: tlbr({{
751 MipsISA::PTE *PTEntry =
752 xc->tcBase()->getITBPtr()->
753 getEntry(Index & 0x7FFFFFFF);

--- 1834 unchanged lines hidden --- 		734 Debug = debug;
735 }}, IsReturn, IsSerializing, IsERET);
736 }
737 format CP0TLB {
738 0x01: tlbr({{
739 MipsISA::PTE *PTEntry =
740 xc->tcBase()->getITBPtr()->
741 getEntry(Index & 0x7FFFFFFF);

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