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+ // -*- 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 (getFPConditionCode(FCSR, CC) == 0) Rd = Rs}});
+ 1: movt({{ if (getFPConditionCode(FCSR, CC) == 1) 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 { //fix Nop traditional vs. Nop converted disassembly later
+ 0x0: decode RD default Nop::nop(){
+ 0x0: decode SA {
+ 0x1: ssnop({{ ; }}); //really sll r0,r0,1
+ 0x3: ehb({{ ; }}); //really sll r0,r0,3
+ }
+ }
+
+ default: sll({{ Rd = Rt.uw << SA; }});
+ }
+
+ }
+
+ 0x2: decode RS_SRL {
+ 0x0: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: decode RS {
+ 0x0: sra({{
+ uint32_t temp = Rt >> SA;
+
+ if ( (Rt & 0x80000000) > 0 ) {
+ uint32_t mask = 0x80000000;
+ for(int i=0; i < SA; i++) {
+ temp |= mask;
+ mask = mask >> 1;
+ }
+ }
+
+ Rd = temp;
+ }});
+ }
+
+ 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({{
+ int shift_amt = Rs<4:0>;
+
+ uint32_t temp = Rt >> shift_amt;
+
+ if ( (Rt & 0x80000000) > 0 ) {
+ uint32_t mask = 0x80000000;
+ for(int i=0; i < shift_amt; i++) {
+ temp |= mask;
+ mask = mask >> 1;
+ }
+ }
+
+ Rd = temp;
+ }});
+ }
+ }
+
+ 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({{ Rd = NNPC; NNPC = Rs; }},IsCall,IsReturn);
+
+ 1: jalr_hb({{ Rd = NNPC; 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 BasicOp {
+ 0x4: syscall({{ xc->syscall(R2); }},IsNonSpeculative);
+ 0x5: break({{ panic("Not implemented break yet"); }},IsNonSpeculative);
+ 0x7: sync({{ panic("Not implemented sync yet"); }},IsNonSpeculative);
+ }
+ }
+
+ 0x2: decode FUNCTION_LO {
+ format BasicOp {
+ 0x0: mfhi({{ Rd = HI; }});
+ 0x1: mthi({{ HI = Rs; }});
+ 0x2: mflo({{ Rd = LO; }});
+ 0x3: mtlo({{ LO = Rs; }});
+ }
+ }
+
+ 0x3: decode FUNCTION_LO {
+ format IntOp {
+ 0x0: mult({{
+ int64_t temp1 = Rs.sd * Rt.sd;
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+
+ 0x1: multu({{
+ uint64_t temp1 = Rs.ud * Rt.ud;
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+
+ 0x2: div({{
+ HI = Rs.sd % Rt.sd;
+ LO = Rs.sd / Rt.sd;
+ }});
+
+ 0x3: divu({{
+ HI = Rs.ud % Rt.ud;
+ LO = Rs.ud / Rt.ud;
+ }});
+ }
+ }
+
+ 0x4: decode HINT {
+ 0x0: 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.sw;}});
+ 0x4: and({{ Rd = Rs & Rt;}});
+ 0x5: or({{ Rd = Rs | Rt;}});
+ 0x6: xor({{ Rd = Rs ^ Rt;}});
+ 0x7: nor({{ Rd = ~(Rs | Rt);}});
+ }
+ }
+ }
+
+ 0x5: decode HINT {
+ 0x0: 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 {
+ 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 {
+ 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: decode RT {
+ 0x0: blez({{ cond = (Rs.sw <= 0); }});
+ }
+
+ 0x7: decode RT {
+ 0x0: 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.uw = ( Rs.uw < (uint32_t)sextImm ) ? 1 : 0 }});
+ 0x4: andi({{ Rt.sw = Rs.sw & zextImm;}});
+ 0x5: ori({{ Rt.sw = Rs.sw | zextImm;}});
+ 0x6: xori({{ Rt.sw = Rs.sw ^ zextImm;}});
+
+ 0x7: decode RS {
+ 0x0: lui({{ Rt = imm << 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({{
+ Rt.sw = xc->readMiscReg(MVPControl);
+ xc->setMiscReg(MVPControl,0);
+ }});
+
+ 0x1: evpe({{
+ Rt.sw = xc->readMiscReg(MVPControl);
+ xc->setMiscReg(MVPControl,1);
+ }});
+ }
+
+ 0x1: decode SC {
+ 0x0: dmt({{
+ Rt.sw = xc->readMiscReg(VPEControl);
+ xc->setMiscReg(VPEControl,0);
+ }});
+
+ 0x1: emt({{
+ Rt.sw = xc->readMiscReg(VPEControl);
+ xc->setMiscReg(VPEControl,1);
+ }});
+ }
+
+ 0xC: decode SC {
+ 0x0: di({{
+ Rt.sw = xc->readMiscReg(Status);
+ xc->setMiscReg(Status,0);
+ }});
+
+ 0x1: ei({{
+ Rt.sw = xc->readMiscReg(Status);
+ xc->setMiscReg(Status,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.uw<31:0>; }});
+ 0x3: mfhc1({{ Rt.uw = Fs.ud<63:32>;}});
+ 0x4: mtc1 ({{ Fs.uw = Rt.uw; }});
+ 0x7: mthc1({{
+ uint64_t fs_hi = Rt.uw;
+ uint64_t fs_lo = Fs.ud & 0x0000FFFF;
+ Fs.ud = fs_hi << 32 | fs_lo;
+ }});
+ }
+
+ format System {
+ 0x2: cfc1({{
+ switch (FS)
+ {
+ case 0:
+ Rt = FIR;
+ break;
+ case 25:
+ Rt = 0 | (FCSR & 0xFE000000) >> 24 | (FCSR & 0x00800000) >> 23;
+ break;
+ case 26:
+ Rt = 0 | (FCSR & 0x0003F07C);
+ break;
+ case 28:
+ Rt = 0 | (FCSR & 0x00000F80) | (FCSR & 0x01000000) >> 21 | (FCSR & 0x00000003);
+ break;
+ case 31:
+ Rt = FCSR;
+ break;
+ default:
+ panic("FP Control Value (%d) Not Available. Ignoring Access to"
+ "Floating Control Status Register",FS);
+ }
+ }});
+
+ 0x6: ctc1({{
+ switch (FS)
+ {
+ case 25:
+ FCSR = 0 | (Rt.uw<7:1> << 25) // move 31...25
+ | (FCSR & 0x01000000) // bit 24
+ | (FCSR & 0x004FFFFF);// bit 22...0
+ break;
+
+ case 26:
+ FCSR = 0 | (FCSR & 0xFFFC0000) // move 31...18
+ | Rt.uw<17:12> << 12 // bit 17...12
+ | (FCSR & 0x00000F80) << 7// bit 11...7
+ | Rt.uw<6:2> << 2 // bit 6...2
+ | (FCSR & 0x00000002); // bit 1...0
+ break;
+
+ case 28:
+ FCSR = 0 | (FCSR & 0xFE000000) // move 31...25
+ | Rt.uw<2:2> << 24 // bit 24
+ | (FCSR & 0x00FFF000) << 23// bit 23...12
+ | Rt.uw<11:7> << 7 // bit 24
+ | (FCSR & 0x000007E)
+ | Rt.uw<1:0>;// bit 22...0
+ break;
+
+ case 31:
+ FCSR = Rt.uw;
+ break;
+
+ default:
+ panic("FP Control Value (%d) Not Available. Ignoring Access to"
+ "Floating Control Status Register", FS);
+ }
+ }});
+ }
+ }
+
+ 0x1: decode ND {
+ 0x0: decode TF {
+ format Branch {
+ 0x0: bc1f({{ cond = (getFPConditionCode(FCSR,CC) == 0); }});
+ 0x1: bc1t({{ cond = (getFPConditionCode(FCSR,CC) == 1); }});
+ }
+ }
+
+ 0x1: decode TF {
+ format BranchLikely {
+ 0x0: bc1fl({{ cond = (getFPConditionCode(FCSR,CC) == 0); }});
+ 0x1: bc1tl({{ cond = (getFPConditionCode(FCSR,CC) == 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 FUNCTION_HI {
+ 0x0: decode FUNCTION_LO {
+ format FloatOp {
+ 0x0: add_s({{ Fd.sf = Fs.sf + Ft.sf;}});
+ 0x1: sub_s({{ Fd.sf = Fs.sf - Ft.sf;}});
+ 0x2: mul_s({{ Fd.sf = Fs.sf * Ft.sf;}});
+ 0x3: div_s({{ Fd.sf = Fs.sf / Ft.sf;}});
+ 0x4: sqrt_s({{ Fd.sf = sqrt(Fs.sf);}});
+ 0x5: abs_s({{ Fd.sf = fabs(Fs.sf);}});
+ 0x6: mov_s({{ Fd.sf = Fs.sf;}});
+ 0x7: neg_s({{ Fd.sf = -1 * Fs.sf;}});
+ }
+ }
+
+ 0x1: decode FUNCTION_LO {
+ format Float64Op {
+ 0x0: round_l_s({{
+ Fd.ud = fpConvert(roundFP(Fs.sf,0), SINGLE_TO_LONG);
+ }});
+
+ 0x1: trunc_l_s({{
+ Fd.ud = fpConvert(truncFP(Fs.sf), SINGLE_TO_LONG);
+ }});
+
+ 0x2: ceil_l_s({{
+ Fd.ud = fpConvert(ceil(Fs.sf), SINGLE_TO_LONG);
+ }});
+
+ 0x3: floor_l_s({{
+ Fd.ud = fpConvert(floor(Fs.sf), SINGLE_TO_LONG);
+ }});
+ }
+
+ format FloatOp {
+ 0x4: round_w_s({{
+ Fd.uw = fpConvert(roundFP(Fs.sf,0), SINGLE_TO_WORD);
+ }});
+
+ 0x5: trunc_w_s({{
+ Fd.uw = fpConvert(truncFP(Fs.sf), SINGLE_TO_WORD);
+ }});
+
+ 0x6: ceil_w_s({{
+ Fd.uw = fpConvert(ceil(Fs.sf), SINGLE_TO_WORD);
+ }});
+
+ 0x7: floor_w_s({{
+ Fd.uw = fpConvert(floor(Fs.sf), SINGLE_TO_WORD);
+ }});
+ }
+ }
+
+ 0x2: decode FUNCTION_LO {
+ 0x1: decode MOVCF {
+ format FloatOp {
+ 0x0: movf_s({{if (getFPConditionCode(FCSR,CC) == 0) Fd = Fs;}});
+ 0x1: movt_s({{if (getFPConditionCode(FCSR,CC) == 1) Fd = Fs;}});
+ }
+ }
+
+ format FloatOp {
+ 0x2: movz_s({{ if (Rt == 0) Fd = Fs; }});
+ 0x3: movn_s({{ if (Rt != 0) Fd = Fs; }});
+ 0x5: recip_s({{ Fd = 1 / Fs; }});
+ 0x6: rsqrt_s({{ Fd = 1 / sqrt(Fs);}});
+ }
+ }
+
+ 0x4: decode FUNCTION_LO {
+
+ format FloatConvertOp {
+ 0x1: cvt_d_s({{
+ Fd.ud = fpConvert(Fs.sf, SINGLE_TO_DOUBLE);
+ }});
+
+ 0x4: cvt_w_s({{
+ Fd.uw = fpConvert(Fs.sf, SINGLE_TO_WORD);
+ }});
+ }
+
+ format FloatConvertOp {
+ 0x5: cvt_l_s({{
+ Fd.ud = fpConvert(Fs.sf, SINGLE_TO_LONG);
+ }});
+
+ 0x6: cvt_ps_st({{
+ Fd.ud = (uint64_t)Fs.uw << 32 | (uint64_t)Ft.uw;
+ }});
+ }
+ }
+
+ 0x6: decode FUNCTION_LO {
+ format FloatCompareOp {
+ 0x0: c_f_s({{ cond = 0; }});
+
+ 0x1: c_un_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = 0;
+ }});
+
+ 0x2: c_eq_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf == Ft.sf);
+ }});
+
+ 0x3: c_ueq_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf == Ft.sf);
+ }});
+
+ 0x4: c_olt_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf < Ft.sf);
+ }});
+
+ 0x5: c_ult_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf < Ft.sf);
+ }});
+
+ 0x6: c_ole_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf <= Ft.sf);
+ }});
+
+ 0x7: c_ule_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf <= Ft.sf);
+ }});
+ }
+ }
+
+ 0x7: decode FUNCTION_LO {
+ format FloatCompareWithXcptOp {
+ 0x0: c_sf_s({{ cond = 0; }});
+
+ 0x1: c_ngle_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = 0;
+ }});
+
+ 0x2: c_seq_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf == Ft.sf);
+ }});
+
+ 0x3: c_ngl_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf == Ft.sf);
+ }});
+
+ 0x4: c_lt_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf < Ft.sf);
+ }});
+
+ 0x5: c_nge_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf < Ft.sf);
+ }});
+
+ 0x6: c_le_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 0;
+ else
+ cond = (Fs.sf <= Ft.sf);
+ }});
+
+ 0x7: c_ngt_s({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond = 1;
+ else
+ cond = (Fs.sf <= Ft.sf);
+ }});
+ }
+ }
+ }
+
+ //Table A-15 MIPS32 COP1 Encoding of Function Field When rs=D
+ 0x1: decode FUNCTION_HI {
+ 0x0: decode FUNCTION_LO {
+ format FloatOp {
+ 0x0: add_d({{ Fd.df = Fs.df + Ft.df;}});
+ 0x1: sub_d({{ Fd.df = Fs.df - Ft.df;}});
+ 0x2: mul_d({{ Fd.df = Fs.df * Ft.df;}});
+ 0x3: div_d({{ Fd.df = Fs.df / Ft.df;}});
+ 0x4: sqrt_d({{ Fd.df = sqrt(Fs.df);}});
+ 0x5: abs_d({{ Fd.df = fabs(Fs.df);}});
+ 0x6: mov_d({{ Fd.ud = Fs.ud;}});
+ 0x7: neg_d({{ Fd.df = -1 * Fs.df;}});
+ }
+ }
+
+ 0x1: decode FUNCTION_LO {
+ format FloatOp {
+ 0x0: round_l_d({{
+ Fd.ud = fpConvert(roundFP(Fs.df,0), DOUBLE_TO_LONG);
+ }});
+
+ 0x1: trunc_l_d({{
+ Fd.ud = fpConvert(truncFP(Fs.df), DOUBLE_TO_LONG);
+ }});
+
+ 0x2: ceil_l_d({{
+ Fd.ud = fpConvert(ceil(Fs.df), DOUBLE_TO_LONG);
+ }});
+
+ 0x3: floor_l_d({{
+ Fd.ud = fpConvert(floor(Fs.df), DOUBLE_TO_LONG);
+ }});
+ }
+
+ format FloatOp {
+ 0x4: round_w_d({{
+ Fd.uw = fpConvert(roundFP(Fs.df,0), DOUBLE_TO_WORD);
+ }});
+
+ 0x5: trunc_w_d({{
+ Fd.uw = fpConvert(truncFP(Fs.df), DOUBLE_TO_WORD);
+ }});
+
+ 0x6: ceil_w_d({{
+ Fd.uw = fpConvert(ceil(Fs.df), DOUBLE_TO_WORD);
+ }});
+
+ 0x7: floor_w_d({{
+ Fd.uw = fpConvert(floor(Fs.df), DOUBLE_TO_WORD);
+ }});
+ }
+ }
+
+ 0x2: decode FUNCTION_LO {
+ 0x1: decode MOVCF {
+ format FloatOp {
+ 0x0: movf_d({{if (getFPConditionCode(FCSR,CC) == 0) Fd.df = Fs.df; }});
+ 0x1: movt_d({{if (getFPConditionCode(FCSR,CC) == 1) Fd.df = Fs.df; }});
+ }
+ }
+
+ format BasicOp {
+ 0x2: movz_d({{ if (Rt == 0) Fd.df = Fs.df; }});
+ 0x3: movn_d({{ if (Rt != 0) Fd.df = Fs.df; }});
+ }
+
+ format FloatOp {
+ 0x5: recip_d({{ Fd.df = 1 / Fs.df}});
+ 0x6: rsqrt_d({{ Fd.df = 1 / sqrt(Fs.df) }});
+ }
+ }
+
+ 0x4: decode FUNCTION_LO {
+ format FloatOp {
+ 0x0: cvt_s_d({{
+ Fd.uw = fpConvert(Fs.df, DOUBLE_TO_SINGLE);
+ }});
+
+ 0x4: cvt_w_d({{
+ Fd.uw = fpConvert(Fs.df, DOUBLE_TO_WORD);
+ }});
+
+ 0x5: cvt_l_d({{
+ Fd.ud = fpConvert(Fs.df, DOUBLE_TO_LONG);
+ }});
+ }
+ }
+
+ 0x6: decode FUNCTION_LO {
+ format FloatCompareOp {
+ 0x0: c_f_d({{ cond = 0; }});
+
+ 0x1: c_un_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = 0;
+ }});
+
+ 0x2: c_eq_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df == Ft.df);
+ }});
+
+ 0x3: c_ueq_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df == Ft.df);
+ }});
+
+ 0x4: c_olt_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df < Ft.df);
+ }});
+
+ 0x5: c_ult_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df < Ft.df);
+ }});
+
+ 0x6: c_ole_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df <= Ft.df);
+ }});
+
+ 0x7: c_ule_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df <= Ft.df);
+ }});
+ }
+ }
+
+ 0x7: decode FUNCTION_LO {
+ format FloatCompareWithXcptOp {
+ 0x0: c_sf_d({{ cond = 0; }});
+
+ 0x1: c_ngle_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = 0;
+ }});
+
+ 0x2: c_seq_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df == Ft.df);
+ }});
+
+ 0x3: c_ngl_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df == Ft.df);
+ }});
+
+ 0x4: c_lt_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df < Ft.df);
+ }});
+
+ 0x5: c_nge_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df < Ft.df);
+ }});
+
+ 0x6: c_le_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 0;
+ else
+ cond = (Fs.df <= Ft.df);
+ }});
+
+ 0x7: c_ngt_d({{
+ if (isnan(Fs.df) || isnan(Ft.df))
+ cond = 1;
+ else
+ cond = (Fs.df <= Ft.df);
+ }});
+ }
+ }
+ }
+
+ //Table A-16 MIPS32 COP1 Encoding of Function Field When rs=W
+ 0x4: decode FUNCTION {
+ format FloatConvertOp {
+ 0x20: cvt_s_w({{
+ Fd.uw = fpConvert(Fs.sf, WORD_TO_SINGLE);
+ }});
+
+ 0x21: cvt_d_w({{
+ Fd.ud = fpConvert(Fs.sf, WORD_TO_DOUBLE);
+ }});
+ }
+
+ format Float64ConvertOp {
+ 0x26: cvt_ps_pw({{
+ Fd.ud = fpConvert(Fs.ud, WORD_TO_PS);
+ }});
+ }
+ }
+
+ //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 Float64ConvertOp {
+ 0x20: cvt_s_l({{
+ Fd.uw = fpConvert(Fs.ud, LONG_TO_SINGLE);
+ }});
+
+ 0x21: cvt_d_l({{
+ Fd.ud = fpConvert(Fs.ud, LONG_TO_DOUBLE);
+ }});
+
+ 0x26: cvt_ps_l({{
+ Fd.ud = fpConvert(Fs.ud, LONG_TO_PS);
+ }});
+ }
+ }
+
+ //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 FUNCTION_HI {
+ 0x0: decode FUNCTION_LO {
+ format Float64Op {
+ 0x0: add_ps({{
+ Fd1.sf = Fs1.sf + Ft2.sf;
+ Fd2.sf = Fs2.sf + Ft2.sf;
+ }});
+
+ 0x1: sub_ps({{
+ Fd1.sf = Fs1.sf - Ft2.sf;
+ Fd2.sf = Fs2.sf - Ft2.sf;
+ }});
+
+ 0x2: mul_ps({{
+ Fd1.sf = Fs1.sf * Ft2.sf;
+ Fd2.sf = Fs2.sf * Ft2.sf;
+ }});
+
+ 0x5: abs_ps({{
+ Fd1.sf = fabs(Fs1.sf);
+ Fd2.sf = fabs(Fs2.sf);
+ }});
+
+ 0x6: mov_ps({{
+ Fd1.sf = Fs1.sf;
+ Fd2.sf = Fs2.sf;
+ }});
+
+ 0x7: neg_ps({{
+ Fd1.sf = -1 * Fs1.sf;
+ Fd2.sf = -1 * Fs2.sf;
+ }});
+ }
+ }
+
+ 0x2: decode FUNCTION_LO {
+ 0x1: decode MOVCF {
+ format Float64Op {
+ 0x0: movf_ps({{
+ if (getFPConditionCode(FCSR, CC) == 0)
+ Fd1 = Fs1;
+ if (getFPConditionCode(FCSR, CC+1) == 0)
+ Fd2 = Fs2;
+ }});
+
+ 0x1: movt_ps({{
+ if (getFPConditionCode(FCSR, CC) == 1)
+ Fd1 = Fs1;
+ if (getFPConditionCode(FCSR, CC+1) == 1)
+ Fd2 = Fs2;
+ }});
+ }
+ }
+
+ format Float64Op {
+ 0x2: movz_ps({{
+ if (getFPConditionCode(FCSR, CC) == 0)
+ Fd1 = Fs1;
+ if (getFPConditionCode(FCSR, CC) == 0)
+ Fd2 = Fs2;
+ }});
+
+ 0x3: movn_ps({{
+ if (getFPConditionCode(FCSR, CC) == 1)
+ Fd1 = Fs1;
+ if (getFPConditionCode(FCSR, CC) == 1)
+ Fd2 = Fs2;
+ }});
+ }
+
+ }
+
+ 0x4: decode FUNCTION_LO {
+ 0x0: Float64Op::cvt_s_pu({{
+ Fd.uw = fpConvert(Fs2.uw, PU_TO_SINGLE);
+ }});
+ }
+
+ 0x5: decode FUNCTION_LO {
+ format Float64Op {
+ 0x0: cvt_s_pl({{
+ Fd.uw = fpConvert(Fs1.uw, PL_TO_SINGLE);
+ }});
+
+ 0x4: pll({{ Fd.ud = (uint64_t) Fs1.uw << 32 | Ft1.uw; }});
+ 0x5: plu({{ Fd.ud = (uint64_t) Fs1.uw << 32 | Ft2.uw; }});
+ 0x6: pul({{ Fd.ud = (uint64_t) Fs2.uw << 32 | Ft1.uw; }});
+ 0x7: puu({{ Fd.ud = (uint64_t) Fs2.uw << 32 | Ft2.uw; }});
+ }
+ }
+
+ 0x6: decode FUNCTION_LO {
+ format FloatPSCompareOp {
+ 0x0: c_f_ps({{ cond1 = 0; cond2 = 0; }});
+
+ 0x1: c_un_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = 0;
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = 0;
+
+ }});
+
+ 0x2: c_eq_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs1.sf == Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf == Ft2.sf);
+ }});
+
+ 0x3: c_ueq_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs1.sf == Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf == Ft2.sf);
+ }});
+
+ 0x4: c_olt_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs1.sf < Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf < Ft2.sf);
+ }});
+
+ 0x5: c_ult_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs.sf < Ft.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf < Ft2.sf);
+ }});
+
+ 0x6: c_ole_ps({{
+ if (isnan(Fs.sf) || isnan(Ft.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs.sf <= Ft.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf <= Ft2.sf);
+ }});
+
+ 0x7: c_ule_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs1.sf <= Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf <= Ft2.sf);
+ }});
+ }
+ }
+
+ 0x7: decode FUNCTION_LO {
+ format FloatPSCompareWithXcptOp {
+ 0x0: c_sf_ps({{ cond1 = 0; cond2 = 0; }});
+
+ 0x1: c_ngle_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = 0;
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = 0;
+ }});
+
+ 0x2: c_seq_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs1.sf == Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf == Ft2.sf);
+ }});
+
+ 0x3: c_ngl_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs1.sf == Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf == Ft2.sf);
+ }});
+
+ 0x4: c_lt_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs1.sf < Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf < Ft2.sf);
+ }});
+
+ 0x5: c_nge_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs1.sf < Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf < Ft2.sf);
+ }});
+
+ 0x6: c_le_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 0;
+ else
+ cond1 = (Fs1.sf <= Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 0;
+ else
+ cond2 = (Fs2.sf <= Ft2.sf);
+ }});
+
+ 0x7: c_ngt_ps({{
+ if (isnan(Fs1.sf) || isnan(Ft1.sf))
+ cond1 = 1;
+ else
+ cond1 = (Fs1.sf <= Ft1.sf);
+
+ if (isnan(Fs2.sf) || isnan(Ft2.sf))
+ cond2 = 1;
+ else
+ cond2 = (Fs2.sf <= Ft2.sf);
+ }});
+ }
+ }
+ }
+ }
+ }
+ }
+
+ //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 LoadFloatMemory {
+ 0x0: lwxc1({{ Ft.uw = Mem.uw;}}, {{ EA = Rs + Rt; }});
+ 0x1: ldxc1({{ Ft.ud = Mem.ud;}}, {{ EA = Rs + Rt; }});
+ 0x5: luxc1({{ Ft.uw = Mem.ud;}}, {{ EA = Rs + Rt; }});
+ }
+ }
+
+ 0x1: decode FUNCTION_LO {
+ format StoreFloatMemory {
+ 0x0: swxc1({{ Mem.uw = Ft.uw;}}, {{ EA = Rs + Rt; }});
+ 0x1: sdxc1({{ Mem.ud = Ft.ud;}}, {{ EA = Rs + Rt; }});
+ 0x5: suxc1({{ Mem.ud = Ft.ud;}}, {{ EA = Rs + Rt; }});
+ }
+
+ 0x7: WarnUnimpl::prefx();
+ }
+
+ format FloatOp {
+ 0x3: WarnUnimpl::alnv_ps();
+
+ format BasicOp {
+ 0x4: decode FUNCTION_LO {
+ 0x0: madd_s({{ Fd.sf = (Fs.sf * Ft.sf) + Fr.sf; }});
+ 0x1: madd_d({{ Fd.df = (Fs.df * Ft.df) + Fr.df; }});
+ 0x6: madd_ps({{
+ Fd1.sf = (Fs1.df * Ft1.df) + Fr1.df;
+ Fd2.sf = (Fs2.df * Ft2.df) + Fr2.df;
+ }});
+ }
+
+ 0x5: decode FUNCTION_LO {
+ 0x0: msub_s({{ Fd.sf = (Fs.sf * Ft.sf) - Fr.sf; }});
+ 0x1: msub_d({{ Fd.df = (Fs.df * Ft.df) - Fr.df; }});
+ 0x6: msub_ps({{
+ Fd1.sf = (Fs1.df * Ft1.df) - Fr1.df;
+ Fd2.sf = (Fs2.df * Ft2.df) - Fr2.df;
+ }});
+ }
+
+ 0x6: decode FUNCTION_LO {
+ 0x0: nmadd_s({{ Fd.sf = (-1 * Fs.sf * Ft.sf) - Fr.sf; }});
+ 0x1: nmadd_d({{ Fd.df = (-1 * Fs.df * Ft.df) + Fr.df; }});
+ 0x6: nmadd_ps({{
+ Fd1.sf = -1 * ((Fs1.df * Ft1.df) + Fr1.df);
+ Fd2.sf = -1 * ((Fs2.df * Ft2.df) + Fr2.df);
+ }});
+ }
+
+ 0x7: decode FUNCTION_LO {
+ 0x0: nmsub_s({{ Fd.sf = (-1 * Fs.sf * Ft.sf) - Fr.sf; }});
+ 0x1: nmsub_d({{ Fd.df = (-1 * Fs.df * Ft.df) - Fr.df; }});
+ 0x6: nmsub_ps({{
+ Fd1.sf = -1 * ((Fs1.df * Ft1.df) - Fr1.df);
+ Fd2.sf = -1 * ((Fs2.df * Ft2.df) - Fr2.df);
+ }});
+ }
+ }
+ }
+ }
+
+ 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 = (int64_t) HI << 32 | LO;
+ temp1 = temp1 + (Rs.sw * Rt.sw);
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+
+ 0x1: maddu({{
+ int64_t temp1 = (int64_t) HI << 32 | LO;
+ temp1 = temp1 + (Rs.uw * Rt.uw);
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+
+ 0x2: mul({{ Rd.sw = Rs.sw * Rt.sw; }});
+
+ 0x4: msub({{
+ int64_t temp1 = (int64_t) HI << 32 | LO;
+ temp1 = temp1 - (Rs.sw * Rt.sw);
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+
+ 0x5: msubu({{
+ int64_t temp1 = (int64_t) HI << 32 | LO;
+ temp1 = temp1 - (Rs.uw * Rt.uw);
+ HI = temp1<63:32>;
+ LO = temp1<31:0>;
+ }});
+ }
+ }
+
+ 0x4: decode FUNCTION_LO {
+ format BasicOp {
+ 0x0: clz({{
+ int cnt = 0;
+ uint32_t mask = 0x80000000;
+ for (int i=0; i < 32; i++) {
+ if( (Rs & mask) == 0) {
+ cnt++;
+ } else {
+ break;
+ }
+ }
+ Rd.uw = cnt;
+ }});
+
+ 0x1: clo({{
+ int cnt = 0;
+ uint32_t mask = 0x80000000;
+ for (int i=0; i < 32; i++) {
+ if( (Rs & mask) != 0) {
+ cnt++;
+ } else {
+ break;
+ }
+ }
+ 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 FailUnimpl {
+ 0x1: ext();
+ 0x4: ins();
+ }
+ }
+
+ 0x1: decode FUNCTION_LO {
+ format FailUnimpl {
+ 0x0: fork();
+ 0x1: yield();
+ }
+ }
+
+
+ //Table A-10 MIPS32 BSHFL Encoding of sa Field
+ 0x4: decode SA {
+
+ 0x02: FailUnimpl::wsbh();
+
+ format BasicOp {
+ 0x10: seb({{ Rd.sw = Rt.sw<7:0>}});
+ 0x18: seh({{ Rd.sw = Rt.sw<15:0>}});
+ }
+ }
+
+ 0x6: decode FUNCTION_LO {
+ 0x7: FailUnimpl::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({{
+ uint32_t mem_word = Mem.uw;
+ uint32_t unalign_addr = Rs + disp;
+ uint32_t offset = unalign_addr & 0x00000003;
+#if BYTE_ORDER == BIG_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ Rt = mem_word;
+ break;
+
+ case 1:
+ Rt &= 0x000F;
+ Rt |= (mem_word << 4);
+ break;
+
+ case 2:
+ Rt &= 0x00FF;
+ Rt |= (mem_word << 8);
+ break;
+
+ case 3:
+ Rt &= 0x0FFF;
+ Rt |= (mem_word << 12);
+ break;
+
+ default:
+ panic("lwl: bad offset");
+ }
+#elif BYTE_ORDER == LITTLE_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ Rt &= 0x0FFF;
+ Rt |= (mem_word << 12);
+ break;
+
+ case 1:
+ Rt &= 0x00FF;
+ Rt |= (mem_word << 8);
+ break;
+
+ case 2:
+ Rt &= 0x000F;
+ Rt |= (mem_word << 4);
+ break;
+
+ case 3:
+ Rt = mem_word;
+ break;
+
+ default:
+ panic("lwl: bad offset");
+ }
+#endif
+ }}, {{ EA = (Rs + disp) & ~3; }});
+
+ 0x3: lw({{ Rt.sw = Mem.sw; }});
+ 0x4: lbu({{ Rt.uw = Mem.ub; }});
+ 0x5: lhu({{ Rt.uw = Mem.uh; }});
+ 0x6: lwr({{
+ uint32_t mem_word = Mem.uw;
+ uint32_t unalign_addr = Rs + disp;
+ uint32_t offset = unalign_addr & 0x00000003;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ switch(offset)
+ {
+ case 0: Rt &= 0xFFF0; Rt |= (mem_word >> 12); break;
+ case 1: Rt &= 0xFF00; Rt |= (mem_word >> 8); break;
+ case 2: Rt &= 0xF000; Rt |= (mem_word >> 4); break;
+ case 3: Rt = mem_word; break;
+ default: panic("lwr: bad offset");
+ }
+#elif BYTE_ORDER == LITTLE_ENDIAN
+ switch(offset)
+ {
+ case 0: Rt = mem_word; break;
+ case 1: Rt &= 0xF000; Rt |= (mem_word >> 4); break;
+ case 2: Rt &= 0xFF00; Rt |= (mem_word >> 8); break;
+ case 3: Rt &= 0xFFF0; Rt |= (mem_word >> 12); break;
+ default: panic("lwr: bad offset");
+ }
+#endif
+ }},
+ {{ EA = (Rs + disp) & ~3; }});
+ }
+ }
+
+ 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({{
+ uint32_t mem_word = 0;
+ uint32_t aligned_addr = (Rs + disp) & ~3;
+ uint32_t unalign_addr = Rs + disp;
+ uint32_t offset = unalign_addr & 0x00000003;
+
+ DPRINTF(IEW,"Execute: aligned=0x%x unaligned=0x%x\n offset=0x%x",
+ aligned_addr,unalign_addr,offset);
+
+ fault = xc->read(aligned_addr, (uint32_t&)mem_word, memAccessFlags);
+
+#if BYTE_ORDER == BIG_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ Mem = Rt;
+ break;
+
+ case 1:
+ mem_word &= 0xF000;
+ mem_word |= (Rt >> 4);
+ Mem = mem_word;
+ break;
+
+ case 2:
+ mem_word &= 0xFF00;
+ mem_word |= (Rt >> 8);
+ Mem = mem_word;
+ break;
+
+ case 3:
+ mem_word &= 0xFFF0;
+ mem_word |= (Rt >> 12);
+ Mem = mem_word;
+ break;
+
+ default:
+ panic("swl: bad offset");
+ }
+#elif BYTE_ORDER == LITTLE_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ mem_word &= 0xFFF0;
+ mem_word |= (Rt >> 12);
+ Mem = mem_word;
+ break;
+
+ case 1:
+ mem_word &= 0xFF00;
+ mem_word |= (Rt >> 8);
+ Mem = mem_word;
+ break;
+
+ case 2:
+ mem_word &= 0xF000;
+ mem_word |= (Rt >> 4);
+ Mem = mem_word;
+ break;
+
+ case 3:
+ Mem = Rt;
+ break;
+
+ default:
+ panic("swl: bad offset");
+ }
+#endif
+ }},{{ EA = (Rs + disp) & ~3; }},mem_flags = NO_ALIGN_FAULT);
+
+ 0x3: sw({{ Mem.uw = Rt<31:0>; }});
+
+ 0x6: swr({{
+ uint32_t mem_word = 0;
+ uint32_t aligned_addr = (Rs + disp) & ~3;
+ uint32_t unalign_addr = Rs + disp;
+ uint32_t offset = unalign_addr & 0x00000003;
+
+ fault = xc->read(aligned_addr, (uint32_t&)mem_word, memAccessFlags);
+
+#if BYTE_ORDER == BIG_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ mem_word &= 0x0FFF;
+ mem_word |= (Rt << 12);
+ Mem = mem_word;
+ break;
+
+ case 1:
+ mem_word &= 0x00FF;
+ mem_word |= (Rt << 8);
+ Mem = mem_word;
+ break;
+
+ case 2:
+ mem_word &= 0x000F;
+ mem_word |= (Rt << 4);
+ Mem = mem_word;
+ break;
+
+ case 3:
+ Mem = Rt;
+ break;
+
+ default:
+ panic("swr: bad offset");
+ }
+#elif BYTE_ORDER == LITTLE_ENDIAN
+ switch(offset)
+ {
+ case 0:
+ Mem = Rt;
+ break;
+
+ case 1:
+ mem_word &= 0x000F;
+ mem_word |= (Rt << 4);
+ Mem = mem_word;
+ break;
+
+ case 2:
+ mem_word &= 0x00FF;
+ mem_word |= (Rt << 8);
+ Mem = mem_word;
+ break;
+
+ case 3:
+ mem_word &= 0x0FFF;
+ mem_word |= (Rt << 12);
+ Mem = mem_word;
+ break;
+
+ default:
+ panic("swr: bad offset");
+ }
+#endif
+ }},{{ EA = (Rs + disp) & ~3;}},mem_flags = NO_ALIGN_FAULT);
+ }
+
+ format WarnUnimpl {
+ 0x7: cache();
+ }
+
+ }
+
+ 0x6: decode OPCODE_LO default FailUnimpl::reserved() {
+ 0x0: LoadMemory::ll({{Rt.uw = Mem.uw}},mem_flags=LOCKED);
+
+ format LoadFloatMemory {
+ 0x1: lwc1({{ Ft.uw = Mem.uw; }});
+ 0x5: ldc1({{ Ft.ud = Mem.ud; }});
+ }
+ }
+
+
+ 0x7: decode OPCODE_LO default FailUnimpl::reserved() {
+ 0x0: StoreMemory::sc({{ Mem.uw = Rt.uw; Rt.uw = 1; }});
+
+ format StoreFloatMemory {
+ 0x1: swc1({{ Mem.uw = Ft.uw; }});
+ 0x5: sdc1({{ Mem.ud = Ft.ud; }});
+ }
+ }
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 09:47:44 +0000