// -*- mode:c++ -*- //////////////////////////////////////////////////////////////////// // // The actual MIPS32 ISA decoder // ----------------------------- // The following instructions are specified in the MIPS32 ISA // Specification. Decoding closely follows the style specified // in the MIPS32 ISAthe specification document starting with Table // A-2 (document available @ www.mips.com) // //@todo: Distinguish "unknown/future" use insts from "reserved" // ones decode OPCODE_HI default Unknown::unknown() { // Derived From ... Table A-2 MIPS32 ISA Manual 0x0: decode OPCODE_LO { 0x0: decode FUNCTION_HI { 0x0: decode FUNCTION_LO { 0x1: decode MOVCI { format BasicOp { 0: movf({{ if (xc->readMiscReg(FPCR,0) != CC) Rd = Rs}}); 1: movt({{ if (xc->readMiscReg(FPCR,0) == CC) Rd = Rs}}); } } format BasicOp { //Table A-3 Note: "1. Specific encodings of the rt, rd, and sa fields //are used to distinguish among the SLL, NOP, SSNOP and EHB functions." 0x0: decode RS { 0x0: decode RT default BasicOp::sll({{ Rd = Rt.uw << SA; }}) { 0x0: decode RD{ 0x0: decode HINT { 0x0:nop({{}}); //really sll r0,r0,0 0x1:ssnop({{}});//really sll r0,r0,1 0x3:ehb({{}}); //really sll r0,r0,3 } } } } 0x2: decode SRL { 0: srl({{ Rd = Rt.uw >> SA; }}); //Hardcoded assuming 32-bit ISA, probably need parameter here 1: rotr({{ Rd = (Rt.uw << (32 - SA)) | (Rt.uw >> SA);}}); } 0x3: sra({{ Rd = Rt.sw >> SA; }}); 0x4: sllv({{ Rd = Rt.uw << Rs<4:0>; }}); 0x6: decode SRLV { 0: srlv({{ Rd = Rt.uw >> Rs<4:0>; }}); //Hardcoded assuming 32-bit ISA, probably need parameter here 1: rotrv({{ Rd = (Rt.uw << (32 - Rs<4:0>)) | (Rt.uw >> Rs<4:0>);}}); } 0x7: srav({{ Rd = Rt.sw >> Rs<4:0>; }}); } } 0x1: decode FUNCTION_LO { //Table A-3 Note: "Specific encodings of the hint field are used //to distinguish JR from JR.HB and JALR from JALR.HB" format Jump { 0x0: decode HINT { 0:jr({{ NNPC = Rs & ~1; }},IsReturn); 1:jr_hb({{ NNPC = Rs & ~1; clear_exe_inst_hazards(); }},IsReturn); } 0x1: decode HINT { 0: jalr({{ NNPC = Rs; }},IsCall,IsReturn); 1: jalr_hb({{ NNPC = Rs; clear_exe_inst_hazards();}},IsCall,IsReturn); } } format BasicOp { 0x2: movz({{ if (Rt == 0) Rd = Rs; }}); 0x3: movn({{ if (Rt != 0) Rd = Rs; }}); } format WarnUnimpl { 0x4: syscall();//{{ xc->syscall()}},IsNonSpeculative 0x5: break(); 0x7: sync(); } } 0x2: decode FUNCTION_LO { format BasicOp { 0x0: mfhi({{ Rd = xc->readMiscReg(Hi); }}); 0x1: mthi({{ xc->setMiscReg(Hi,Rs); }}); 0x2: mflo({{ Rd = xc->readMiscReg(Lo); }}); 0x3: mtlo({{ xc->setMiscReg(Lo,Rs); }}); } } 0x3: decode FUNCTION_LO { format IntOp { 0x0: mult({{ int64_t temp1 = Rs.sw * Rt.sw; xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); 0x1: multu({{ int64_t temp1 = Rs.uw * Rt.uw; xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); 0x2: div({{ xc->setMiscReg(Hi,Rs.sw % Rt.sw); xc->setMiscReg(Lo,Rs.sw / Rt.sw); }}); 0x3: divu({{ xc->setMiscReg(Hi,Rs.uw % Rt.uw); xc->setMiscReg(Lo,Rs.uw / Rt.uw); }}); } } 0x4: decode FUNCTION_LO { format IntOp { 0x0: add({{ Rd.sw = Rs.sw + Rt.sw;/*Trap on Overflow*/}}); 0x1: addu({{ Rd.sw = Rs.sw + Rt.sw;}}); 0x2: sub({{ Rd.sw = Rs.sw - Rt.sw; /*Trap on Overflow*/}}); 0x3: subu({{ Rd.sw = Rs.sw - Rt.uw;}}); 0x4: and({{ Rd = Rs & Rt;}}); 0x5: or({{ Rd = Rs | Rt;}}); 0x6: xor({{ Rd = Rs ^ Rt;}}); 0x7: nor({{ Rd = ~(Rs | Rt);}}); } } 0x5: decode FUNCTION_LO { format IntOp{ 0x2: slt({{ Rd.sw = ( Rs.sw < Rt.sw ) ? 1 : 0}}); 0x3: sltu({{ Rd.uw = ( Rs.uw < Rt.uw ) ? 1 : 0}}); } } 0x6: decode FUNCTION_LO { format Trap { 0x0: tge({{ cond = (Rs.sw >= Rt.sw); }}); 0x1: tgeu({{ cond = (Rs.uw >= Rt.uw); }}); 0x2: tlt({{ cond = (Rs.sw < Rt.sw); }}); 0x3: tltu({{ cond = (Rs.uw >= Rt.uw); }}); 0x4: teq({{ cond = (Rs.sw == Rt.sw); }}); 0x6: tne({{ cond = (Rs.sw != Rt.sw); }}); } } } 0x1: decode REGIMM_HI { 0x0: decode REGIMM_LO { format Branch { 0x0: bltz({{ cond = (Rs.sw < 0); }}); 0x1: bgez({{ cond = (Rs.sw >= 0); }}); } format BranchLikely { //MIPS obsolete instructions 0x2: bltzl({{ cond = (Rs.sw < 0); }}); 0x3: bgezl({{ cond = (Rs.sw >= 0); }}); } } 0x1: decode REGIMM_LO { format Trap { 0x0: tgei( {{ cond = (Rs.sw >= INTIMM); }}); 0x1: tgeiu({{ cond = (Rs.uw >= INTIMM); }}); 0x2: tlti( {{ cond = (Rs.sw < INTIMM); }}); 0x3: tltiu({{ cond = (Rs.uw < INTIMM); }}); 0x4: teqi( {{ cond = (Rs.sw == INTIMM);}}); 0x6: tnei( {{ cond = (Rs.sw != INTIMM);}}); } } 0x2: decode REGIMM_LO { format Branch { 0x0: bltzal({{ cond = (Rs.sw < 0); }}, IsCall,IsReturn); 0x1: bgezal({{ cond = (Rs.sw >= 0); }}, IsCall,IsReturn); } format BranchLikely { //Will be removed in future MIPS releases 0x2: bltzall({{ cond = (Rs.sw < 0); }}, IsCall, IsReturn); 0x3: bgezall({{ cond = (Rs.sw >= 0); }}, IsCall, IsReturn); } } 0x3: decode REGIMM_LO { format WarnUnimpl { 0x7: synci(); } } } format Jump { 0x2: j({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2);}}); 0x3: jal({{ NNPC = (NPC & 0xF0000000) | (JMPTARG << 2); }},IsCall,IsReturn); } format Branch { 0x4: beq({{ cond = (Rs.sw == Rt.sw); }}); 0x5: bne({{ cond = (Rs.sw != Rt.sw); }}); 0x6: blez({{ cond = (Rs.sw <= 0); }}); 0x7: bgtz({{ cond = (Rs.sw > 0); }}); } } 0x1: decode OPCODE_LO { format IntOp { 0x0: addi({{ Rt.sw = Rs.sw + imm; /*Trap If Overflow*/}}); 0x1: addiu({{ Rt.sw = Rs.sw + imm;}}); 0x2: slti({{ Rt.sw = ( Rs.sw < imm) ? 1 : 0 }}); 0x3: sltiu({{ Rt.sw = ( Rs.sw < imm ) ? 1 : 0 }}); 0x4: andi({{ Rt.sw = Rs.sw & INTIMM;}}); 0x5: ori({{ Rt.sw = Rs.sw | INTIMM;}}); 0x6: xori({{ Rt.sw = Rs.sw ^ INTIMM;}}); 0x7: lui({{ Rt = INTIMM << 16}}); } } 0x2: decode OPCODE_LO { //Table A-11 MIPS32 COP0 Encoding of rs Field 0x0: decode RS_MSB { 0x0: decode RS { format System { 0x0: mfc0({{ //uint64_t reg_num = Rd.uw; Rt = xc->readMiscReg(RD << 5 | SEL); }}); 0x4: mtc0({{ //uint64_t reg_num = Rd.uw; xc->setMiscReg(RD << 5 | SEL,Rt); }}); 0x8: mftr({{ //The contents of the coprocessor 0 register specified by the //combination of rd and sel are loaded into general register //rt. Note that not all coprocessor 0 registers support the //sel field. In those instances, the sel field must be zero. //MT Code Needed Here }}); 0xC: mttr({{ //The contents of the coprocessor 0 register specified by the //combination of rd and sel are loaded into general register //rt. Note that not all coprocessor 0 registers support the //sel field. In those instances, the sel field must be zero. //MT Code Needed Here }}); 0xA: rdpgpr({{ //Accessing Previous Shadow Set Register Number //uint64_t prev = xc->readMiscReg(SRSCtl)/*[PSS]*/; //uint64_t reg_num = Rt.uw; //Rd = xc->regs.IntRegFile[prev]; //Rd = xc->shadowIntRegFile[prev][reg_num]; }}); 0xB: decode RD { 0x0: decode SC { 0x0: dvpe({{ int idx; int sel; getMiscRegIdx(MVPControl,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel); }}); 0x1: evpe({{ int idx; int sel; getMiscRegIdx(MVPControl,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel,1); }}); } 0x1: decode SC { 0x0: dmt({{ int idx; int sel; getMiscRegIdx(VPEControl,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel); }}); 0x1: emt({{ int idx; int sel; getMiscRegIdx(VPEControl,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel,1); }}); } 0xC: decode SC { 0x0: di({{ int idx; int sel; getMiscRegIdx(Status,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel); }}); 0x1: ei({{ int idx; int sel; getMiscRegIdx(Status,idx,sel); Rt.sw = xc->readMiscReg(idx,sel); xc->setMiscReg(idx,sel,1); }}); } } 0xE: wrpgpr({{ //Accessing Previous Shadow Set Register Number //uint64_t prev = xc->readMiscReg(SRSCtl/*[PSS]*/); //uint64_t reg_num = Rd.uw; //xc->regs.IntRegFile[prev]; //xc->shadowIntRegFile[prev][reg_num] = Rt; }}); } } //Table A-12 MIPS32 COP0 Encoding of Function Field When rs=CO 0x1: decode FUNCTION { format System { 0x01: tlbr({{ }}); 0x02: tlbwi({{ }}); 0x06: tlbwr({{ }}); 0x08: tlbp({{ }}); } format WarnUnimpl { 0x18: eret(); 0x1F: deret(); 0x20: wait(); } } } //Table A-13 MIPS32 COP1 Encoding of rs Field 0x1: decode RS_MSB { 0x0: decode RS_HI { 0x0: decode RS_LO { format FloatOp { 0x0: mfc1({{ /*Rt.uw = Fs.ud<31:0>;*/ }}); 0x2: cfc1({{ /*Rt.uw = xc->readMiscReg(FPCR[Fs]);*/}}); 0x3: mfhc1({{ /*Rt.uw = Fs.ud<63:32>*/;}}); 0x4: mtc1({{ /*Fs = Rt.uw*/}}); 0x6: ctc1({{ /*xc->setMiscReg(FPCR[Fs],Rt);*/}}); 0x7: mthc1({{ /*Fs<63:32> = Rt.uw*/}}); } } 0x1: decode ND { 0x0: decode TF { format Branch { 0x0: bc1f({{ cond = (xc->readMiscReg(FPCR) == 0); }}); 0x1: bc1t({{ cond = (xc->readMiscReg(FPCR) == 1); }}); } } 0x1: decode TF { format BranchLikely { 0x0: bc1fl({{ cond = (xc->readMiscReg(FPCR) == 0); }}); 0x1: bc1tl({{ cond = (xc->readMiscReg(FPCR) == 1); }}); } } } } 0x1: decode RS_HI { 0x2: decode RS_LO { //Table A-14 MIPS32 COP1 Encoding of Function Field When rs=S //(( single-word )) 0x0: decode RS_HI { 0x0: decode RS_LO { format FloatOp { 0x0: adds({{ Fd.sf = Fs.sf + Ft.sf;}}); 0x1: subs({{ Fd.sf = Fs.sf - Ft.sf;}}); 0x2: muls({{ Fd.sf = Fs.sf * Ft.sf;}}); 0x3: divs({{ Fd.sf = Fs.sf / Ft.sf;}}); 0x4: sqrts({{ Fd.sf = sqrt(Fs.sf);}}); 0x5: abss({{ Fd.sf = fabs(Fs.sf);}}); 0x6: movs({{ Fd.sf = Fs.sf;}}); 0x7: negs({{ Fd.sf = -1 * Fs.sf;}}); } } 0x1: decode RS_LO { //only legal for 64 bit-FP format Float64Op { 0x0: round_l_s({{ Fd = convert_and_round(Fs.sf,RND_NEAREST,FP_LONG,FP_SINGLE);}}); 0x1: trunc_l_s({{ Fd = convert_and_round(Fs.sf,RND_ZERO,FP_LONG,FP_SINGLE);}}); 0x2: ceil_l_s({{ Fd = convert_and_round(Fs.sf,RND_UP,FP_LONG,FP_SINGLE);}}); 0x3: floor_l_s({{ Fd = convert_and_round(Fs.sf,RND_DOWN,FP_LONG,FP_SINGLE);}}); } format FloatOp { 0x4: round_w_s({{ Fd = convert_and_round(Fs.sf,RND_NEAREST,FP_WORD,FP_SINGLE);}}); 0x5: trunc_w_s({{ Fd = convert_and_round(Fs.sf,RND_ZERO,FP_WORD,FP_SINGLE);}}); 0x6: ceil_w_s({{ Fd = convert_and_round(Fs.sf,RND_UP,FP_WORD,FP_SINGLE);}}); 0x7: floor_w_s({{ Fd = convert_and_round(Fs.sf,RND_DOWN,FP_WORD,FP_SINGLE);}}); } } 0x2: decode RS_LO { 0x1: decode MOVCF { format FloatOp { 0x0: movfs({{if (xc->readMiscReg(FPCR) != CC) Fd = Fs; }}); 0x1: movts({{if (xc->readMiscReg(FPCR) == CC) Fd = Fs;}}); } } format BasicOp { 0x2: movzs({{ if (Rt == 0) Fd = Fs; }}); 0x3: movns({{ if (Rt != 0) Fd = Fs; }}); } format Float64Op { 0x5: recips({{ Fd = 1 / Fs; }}); 0x6: rsqrts({{ Fd = 1 / sqrt((double)Fs.ud);}}); } } 0x4: decode RS_LO { format FloatOp { 0x1: cvt_d_s({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.sf,rnd_mode,FP_DOUBLE,FP_SINGLE); }}); 0x4: cvt_w_s({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.sf,rnd_mode,FP_WORD,FP_SINGLE); }}); } //only legal for 64 bit format Float64Op { 0x5: cvt_l_s({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.sf,rnd_mode,FP_LONG,FP_SINGLE); }}); 0x6: cvt_ps_s({{ /*Fd.df = Fs.df<31:0> | Ft.df<31:0>;*/ }}); } } } //Table A-15 MIPS32 COP1 Encoding of Function Field When rs=D 0x1: decode RS_HI { 0x0: decode RS_LO { format FloatOp { 0x0: addd({{ Fd.df = Fs.df + Ft.df;}}); 0x1: subd({{ Fd.df = Fs.df - Ft.df;}}); 0x2: muld({{ Fd.df = Fs.df * Ft.df;}}); 0x3: divd({{ Fd.df = Fs.df / Ft.df;}}); 0x4: sqrtd({{ Fd.df = sqrt(Fs.df);}}); 0x5: absd({{ Fd.df = fabs(Fs.df);}}); 0x6: movd({{ Fd.df = Fs.df;}}); 0x7: negd({{ Fd.df = -1 * Fs.df;}}); } } 0x1: decode RS_LO { //only legal for 64 bit format Float64Op { 0x0: round_l_d({{ Fd = convert_and_round(Fs.df,RND_NEAREST,FP_LONG,FP_DOUBLE); }}); 0x1: trunc_l_d({{ Fd = convert_and_round(Fs.df,RND_ZERO,FP_LONG,FP_DOUBLE);}}); 0x2: ceil_l_d({{ Fd = convert_and_round(Fs.df,RND_UP,FP_LONG,FP_DOUBLE);}}); 0x3: floor_l_d({{ Fd = convert_and_round(Fs.df,RND_DOWN,FP_LONG,FP_DOUBLE);}}); } format FloatOp { 0x4: round_w_d({{ Fd = convert_and_round(Fs.df,RND_NEAREST,FP_LONG,FP_DOUBLE); }}); 0x5: trunc_w_d({{ Fd = convert_and_round(Fs.df,RND_ZERO,FP_LONG,FP_DOUBLE); }}); 0x6: ceil_w_d({{ Fd = convert_and_round(Fs.df,RND_UP,FP_LONG,FP_DOUBLE); }}); 0x7: floor_w_d({{ Fd = convert_and_round(Fs.df,RND_DOWN,FP_LONG,FP_DOUBLE); }}); } } 0x2: decode RS_LO { 0x1: decode MOVCF { format FloatOp { 0x0: movfd({{if (xc->readMiscReg(FPCR) != CC) Fd.df = Fs.df; }}); 0x1: movtd({{if (xc->readMiscReg(FPCR) == CC) Fd.df = Fs.df; }}); } } format BasicOp { 0x2: movzd({{ if (Rt == 0) Fd.df = Fs.df; }}); 0x3: movnd({{ if (Rt != 0) Fd.df = Fs.df; }}); } format Float64Op { 0x5: recipd({{ Fd.df = 1 / Fs.df}}); 0x6: rsqrtd({{ Fd.df = 1 / sqrt(Fs.df) }}); } } 0x4: decode RS_LO { format FloatOp { 0x0: cvt_s_d({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_SINGLE,FP_DOUBLE); }}); 0x4: cvt_w_d({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_WORD,FP_DOUBLE); }}); } //only legal for 64 bit format Float64Op { 0x5: cvt_l_d({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_LONG,FP_DOUBLE); }}); } } } //Table A-16 MIPS32 COP1 Encoding of Function Field When rs=W 0x4: decode FUNCTION { format FloatOp { 0x20: cvt_s({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_SINGLE,FP_WORD); }}); 0x21: cvt_d({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_DOUBLE,FP_WORD); }}); } } //Table A-16 MIPS32 COP1 Encoding of Function Field When rs=L1 //Note: "1. Format type L is legal only if 64-bit floating point operations //are enabled." 0x5: decode FUNCTION_HI { format FloatOp { 0x10: cvt_s_l({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_SINGLE,FP_LONG); }}); 0x11: cvt_d_l({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_DOUBLE,FP_LONG); }}); } } //Table A-17 MIPS64 COP1 Encoding of Function Field When rs=PS1 //Note: "1. Format type PS is legal only if 64-bit floating point operations //are enabled. " 0x6: decode RS_HI { 0x0: decode RS_LO { format Float64Op { 0x0: addps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = Fs.df + Ft.df; }}); 0x1: subps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = Fs.df - Ft.df; }}); 0x2: mulps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = Fs.df * Ft.df; }}); 0x5: absps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = fabs(Fs.df); }}); 0x6: movps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut //Fd.df = Fs<31:0> | Ft<31:0>; }}); 0x7: negps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = -1 * Fs.df; }}); } } 0x2: decode RS_LO { 0x1: decode MOVCF { format Float64Op { 0x0: movfps({{if (xc->readMiscReg(FPCR) != CC) Fd = Fs;}}); 0x1: movtps({{if (xc->readMiscReg(FPCR) == CC) Fd = Fs;}}); } } format BasicOp { 0x2: movzps({{if (xc->readMiscReg(FPCR) != CC) Fd = Fs; }}); 0x3: movnps({{if (xc->readMiscReg(FPCR) == CC) Fd = Fs; }}); } } 0x4: decode RS_LO { 0x0: Float64Op::cvt_s_pu({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_DOUBLE,FP_PS_HI); }}); } 0x5: decode RS_LO { format Float64Op { 0x0: cvt_s_pl({{ int rnd_mode = xc->readMiscReg(FCSR); Fd = convert_and_round(Fs.df,rnd_mode,FP_SINGLE,FP_PS_LO); }}); 0x4: pll({{ /*Fd.df = Fs<31:0> | Ft<31:0>*/}}); 0x5: plu({{ /*Fd.df = Fs<31:0> | Ft<63:32>*/}}); 0x6: pul({{ /*Fd.df = Fs<63:32> | Ft<31:0>*/}}); 0x7: puu({{ /*Fd.df = Fs<63:32 | Ft<63:32>*/}}); } } } } } } //Table A-19 MIPS32 COP2 Encoding of rs Field 0x2: decode RS_MSB { 0x0: decode RS_HI { 0x0: decode RS_LO { format WarnUnimpl { 0x0: mfc2(); 0x2: cfc2(); 0x3: mfhc2(); 0x4: mtc2(); 0x6: ctc2(); 0x7: mftc2(); } } 0x1: decode ND { 0x0: decode TF { format WarnUnimpl { 0x0: bc2f(); 0x1: bc2t(); } } 0x1: decode TF { format WarnUnimpl { 0x0: bc2fl(); 0x1: bc2tl(); } } } } } //Table A-20 MIPS64 COP1X Encoding of Function Field 1 //Note: "COP1X instructions are legal only if 64-bit floating point //operations are enabled." 0x3: decode FUNCTION_HI { 0x0: decode FUNCTION_LO { format LoadMemory2 { 0x0: lwxc1({{ EA = Rs + Rt; }},{{ /*F_t<31:0> = Mem.sf; */}}); 0x1: ldxc1({{ EA = Rs + Rt; }},{{ /*F_t<63:0> = Mem.df;*/ }}); 0x5: luxc1({{ //Need to make EA<2:0> = 0 EA = Rs + Rt; }}, {{ /*F_t<31:0> = Mem.df; */}}); } } 0x1: decode FUNCTION_LO { format StoreMemory2 { 0x0: swxc1({{ EA = Rs + Rt; }},{{ /*Mem.sf = Ft<31:0>; */}}); 0x1: sdxc1({{ EA = Rs + Rt; }},{{ /*Mem.df = Ft<63:0> */}}); 0x5: suxc1({{ //Need to make EA<2:0> = 0 EA = Rs + Rt; }}, {{ /*Mem.df = F_t<63:0>;*/}}); } 0x7: WarnUnimpl::prefx(); } format FloatOp { 0x3: WarnUnimpl::alnv_ps(); format BasicOp { 0x4: decode FUNCTION_LO { 0x0: madd_s({{ Fd.sf = (Fs.sf * Fs.sf) + Fr.sf; }}); 0x1: madd_d({{ Fd.df = (Fs.df * Fs.df) + Fr.df; }}); 0x6: madd_ps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = (Fs.df * Fs.df) + Fr.df; }}); } 0x5: decode FUNCTION_LO { 0x0: msub_s({{ Fd.sf = (Fs.sf * Fs.sf) - Fr.sf; }}); 0x1: msub_d({{ Fd.df = (Fs.df * Fs.df) - Fr.df; }}); 0x6: msub_ps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = (Fs.df * Fs.df) - Fr.df; }}); } 0x6: decode FUNCTION_LO { 0x0: nmadd_s({{ Fd.sf = (-1 * Fs.sf * Fs.sf) - Fr.sf; }}); 0x1: nmadd_d({{ Fd.df = (-1 * Fs.df * Fs.df) + Fr.df; }}); 0x6: nmadd_ps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = (-1 * Fs.df * Fs.df) + Fr.df; }}); } 0x7: decode FUNCTION_LO { 0x0: nmsub_s({{ Fd.sf = (-1 * Fs.sf * Fs.sf) - Fr.sf; }}); 0x1: nmsub_d({{ Fd.df = (-1 * Fs.df * Fs.df) - Fr.df; }}); 0x6: nmsub_ps({{ //Must Check for Exception Here... Supposed to Operate on Upper and //Lower Halves Independently but we take simulator shortcut Fd.df = (-1 * Fs.df * Fs.df) + Fr.df; }}); } } } } //MIPS obsolete instructions format BranchLikely { 0x4: beql({{ cond = (Rs.sw == 0); }}); 0x5: bnel({{ cond = (Rs.sw != 0); }}); 0x6: blezl({{ cond = (Rs.sw <= 0); }}); 0x7: bgtzl({{ cond = (Rs.sw > 0); }}); } } 0x3: decode OPCODE_LO default FailUnimpl::reserved() { //Table A-5 MIPS32 SPECIAL2 Encoding of Function Field 0x4: decode FUNCTION_HI { 0x0: decode FUNCTION_LO { format IntOp { 0x0: madd({{ int64_t temp1 = xc->readMiscReg(Hi) << 32 | xc->readMiscReg(Lo) >> 32; temp1 = temp1 + (Rs.sw * Rt.sw); xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); 0x1: maddu({{ int64_t temp1 = xc->readMiscReg(Hi) << 32 | xc->readMiscReg(Lo) >> 32; temp1 = temp1 + (Rs.uw * Rt.uw); xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); 0x2: mul({{ Rd.sw = Rs.sw * Rt.sw; }}); 0x4: msub({{ int64_t temp1 = xc->readMiscReg(Hi) << 32 | xc->readMiscReg(Lo) >> 32; temp1 = temp1 - (Rs.sw * Rt.sw); xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); 0x5: msubu({{ int64_t temp1 = xc->readMiscReg(Hi) << 32 | xc->readMiscReg(Lo) >> 32; temp1 = temp1 - (Rs.uw * Rt.uw); xc->setMiscReg(Hi,temp1<63:32>); xc->setMiscReg(Lo,temp1<31:0>); }}); } } 0x4: decode FUNCTION_LO { format BasicOp { 0x0: clz({{ /*int cnt = 0; int idx = 0; while ( Rs.uw != 1) { cnt++; idx--; } Rd.uw = cnt;*/ }}); 0x1: clo({{ /*int cnt = 0; int idx = 0; while ( Rs.uw != 0) { cnt++; idx--; } Rd.uw = cnt;*/ }}); } } 0x7: decode FUNCTION_LO { 0x7: WarnUnimpl::sdbbp(); } } //Table A-6 MIPS32 SPECIAL3 Encoding of Function Field for Release 2 of the Architecture 0x7: decode FUNCTION_HI { 0x0: decode FUNCTION_LO { format WarnUnimpl { 0x1: ext(); 0x4: ins(); } } 0x1: decode FUNCTION_LO { format WarnUnimpl { 0x0: fork(); 0x1: yield(); } } //Table A-10 MIPS32 BSHFL Encoding of sa Field 0x4: decode SA { 0x02: WarnUnimpl::wsbh(); format BasicOp { 0x10: seb({{ Rd.sw = /* sext32(Rt<7>,24) | */ Rt<7:0>}}); 0x18: seh({{ Rd.sw = /* sext32(Rt<15>,16) | */ Rt<15:0>}}); } } 0x6: decode FUNCTION_LO { 0x7: BasicOp::rdhwr({{ /*Rt = xc->hwRegs[RD];*/ }}); } } } 0x4: decode OPCODE_LO default FailUnimpl::reserved() { format LoadMemory { 0x0: lb({{ Rt.sw = Mem.sb; }}); 0x1: lh({{ Rt.sw = Mem.sh; }}); 0x2: lwl({{ Rt.sw = Mem.sw; }});//, WordAlign); 0x3: lw({{ Rt.sw = Mem.sb; }}); 0x4: lbu({{ Rt.uw = Mem.ub; }}); 0x5: lhu({{ Rt.uw = Mem.uh; }}); 0x6: lwr({{ Rt.uw = Mem.uw; }});//, WordAlign); } 0x7: FailUnimpl::reserved(); } 0x5: decode OPCODE_LO default FailUnimpl::reserved() { format StoreMemory { 0x0: sb({{ Mem.ub = Rt<7:0>; }}); 0x1: sh({{ Mem.uh = Rt<15:0>; }}); 0x2: swl({{ Mem.ub = Rt<31:0>; }});//,WordAlign); 0x3: sw({{ Mem.ub = Rt<31:0>; }}); 0x6: swr({{ Mem.ub = Rt<31:0>; }});//,WordAlign); } format WarnUnimpl { 0x7: cache(); } } 0x6: decode OPCODE_LO default FailUnimpl::reserved() { 0x0: WarnUnimpl::ll(); format LoadMemory { 0x1: lwc1({{ /*F_t<31:0> = Mem.sf; */}}); 0x5: ldc1({{ /*F_t<63:0> = Mem.df; */}}); } } 0x7: decode OPCODE_LO default FailUnimpl::reserved() { 0x0: WarnUnimpl::sc(); format StoreMemory { 0x1: swc1({{ //Mem.sf = Ft<31:0>; }}); 0x5: sdc1({{ //Mem.df = Ft<63:0>; }}); } } }