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-rw-r--r--arch/mips/isa_desc/decoder.h575
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diff --git a/arch/mips/isa_desc/decoder.h b/arch/mips/isa_desc/decoder.h
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+////////////////////////////////////////////////////////////////////
+//
+// 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 FailUnimpl::unknown() {
+
+ // Derived From ... Table A-2 MIPS32 ISA Manual
+ 0x0: decode OPCODE_LO default FailUnimpl::reserved(){
+
+ 0x0: decode FUNCTION_HI {
+ 0x0: decode FUNCTION_LO {
+ 0x1: decode MOVCI {
+ format Move {
+ 0: movc({{ }});
+ 1: movt({{ }});
+ }
+ }
+
+ format ShiftRotate {
+ //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: sll({{ }});
+
+ 0x2: decode SRL {
+ 0: srl({{ }});
+ 1: rotr({{ }});
+ }
+
+ 0x3: sar({{ }});
+
+ 0x4: sllv({{ }});
+
+ 0x6: decode SRLV {
+ 0: srlv({{ }});
+ 1: rotrv({{ }});
+ }
+
+ 0x7: srav({{ }});
+ }
+ }
+
+ 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: jr({{ }});
+ 0x1: jalr({{ }});
+ }
+
+ format Move {
+ 0x2: movz({{ }});
+ 0x3: movn({{ }});
+ }
+
+ 0x4: Syscall::syscall({{ }});
+ 0x5: Break::break({{ }});
+ 0x7: Synchronize::synch({{ }});
+ }
+
+ 0x2: decode FUNCTION_LO {
+ format MultDiv {
+ 0x0: mfhi({{ }});
+ 0x1: mthi({{ }});
+ 0x2: mflo({{ }});
+ 0x3: mtlo({{ }});
+ }
+ };
+
+ 0x3: decode FUNCTION_LO {
+ format MultDiv {
+ 0x0: mult({{ }});
+ 0x1: multu({{ }});
+ 0x2: div({{ }});
+ 0x3: divu({{ }});
+ }
+ };
+
+ 0x4: decode FUNCTION_LO {
+ format Arithmetic {
+ 0x0: add({{ }});
+ 0x1: addu({{ }});
+ 0x2: sub({{ }});
+ 0x3: subu({{ }});
+ }
+
+ format Logical {
+ 0x0: and({{ }});
+ 0x1: or({{ }});
+ 0x2: xor({{ }});
+ 0x3: nor({{ }});
+ }
+ }
+
+ 0x5: decode FUNCTION_LO {
+ format SetInstructions{
+ 0x2: slt({{ }});
+ 0x3: sltu({{ }});
+ }
+ };
+
+ 0x6: decode FUNCTION_LO {
+ format Trap {
+ 0x0: tge({{ }});
+ 0x1: tgeu({{ }});
+ 0x2: tlt({{ }});
+ 0x3: tltu({{ }});
+ 0x4: teq({{ }});
+ 0x6: tne({{ }});
+ }
+ }
+ }
+
+ 0x1: decode REGIMM_HI {
+ 0x0: decode REGIMM_LO {
+ format Branch {
+ 0x0: bltz({{ }});
+ 0x1: bgez({{ }});
+
+ //MIPS obsolete instructions
+ 0x2: bltzl({{ }});
+ 0x3: bgezl({{ }});
+ }
+ }
+
+ 0x1: decode REGIMM_LO {
+ format Trap {
+ 0x0: tgei({{ }});
+ 0x1: tgeiu({{ }});
+ 0x2: tlti({{ }});
+ 0x3: tltiu({{ }});
+ 0x4: teqi({{ }});
+ 0x6: tnei({{ }});
+ }
+ }
+
+ 0x2: decode REGIMM_LO {
+ format Branch {
+ 0x0: bltzal({{ }});
+ 0x1: bgezal({{ }});
+
+ //MIPS obsolete instructions
+ 0x2: bltzall({{ }});
+ 0x3: bgezall({{ }});
+ }
+ }
+
+ 0x3: decode REGIMM_LO {
+ 0x7: synci({{ }});
+ }
+ }
+
+ format Jump {
+ 0x2: j({{ }});
+ 0x3: jal({{ }});
+ }
+
+ format Branch {
+ 0x4: beq({{ }});
+ 0x5: bne({{ }});
+ 0x6: blez({{ }});
+ 0x7: bgtz({{ }});
+ }
+ };
+
+ 0x1: decode OPCODE_LO default FailUnimpl::reserved(){
+ format IntImmediate {
+ 0x0: addi({{ }});
+ 0x1: addiu({{ }});
+ 0x2: slti({{ }});
+ 0x3: sltiu({{ }});
+ 0x4: andi({{ }});
+ 0x5: ori({{ }});
+ 0x6: xori({{ }});
+ 0x7: lui({{ }});
+ };
+ };
+
+ 0x2: decode OPCODE_LO default FailUnimpl::reserved(){
+
+ //Table A-11 MIPS32 COP0 Encoding of rs Field
+ 0x0: decode RS_MSB {
+ 0x0: decode RS {
+ 0x0: mfc0({{ }});
+ 0xC: mtc0({{ }});
+ 0xA: rdpgpr({{ }});
+
+ 0xB: decode SC {
+ 0x0: di({{ }});
+ 0x1: ei({{ }});
+ }
+
+ 0xE: wrpgpr({{ }});
+ }
+
+ //Table A-12 MIPS32 COP0 Encoding of Function Field When rs=CO
+ 0x1: decode FUNCTION {
+ 0x01: tlbr({{ }});
+ 0x02: tlbwi({{ }});
+ 0x06: tlbwr({{ }});
+ 0x08: tlbp({{ }});
+ 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 {
+ 0x0: mfc1({{ }});
+ 0x2: cfc1({{ }});
+ 0x3: mfhc1({{ }});
+ 0x4: mtc1({{ }});
+ 0x6: ctc1({{ }});
+ 0x7: mftc1({{ }});
+ }
+
+ 0x1: decode ND {
+ 0x0: decode TF {
+ 0x0: bc1f({{ }});
+ 0x1: bc1t({{ }});
+ }
+
+ 0x1: decode TF {
+ 0x0: bc1fl({{ }});
+ 0x1: bc1tl({{ }});
+ }
+ }
+ }
+
+ 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 {
+ 0x0: add_fmt({{ }});
+ 0x1: sub_fmt({{ }});
+ 0x2: mul_fmt({{ }});
+ 0x3: div_fmt({{ }});
+ 0x4: sqrt_fmt({{ }});
+ 0x5: abs_fmt({{ }});
+ 0x6: mov_fmt({{ }});
+ 0x7: neg_fmt({{ }});
+ }
+
+ 0x1: decode RS_LO {
+ //only legal for 64 bit
+ format mode64 {
+ 0x0: round_l({{ }});
+ 0x1: trunc_l({{ }});
+ 0x2: ceil_l({{ }});
+ 0x3: floor_l({{ }});
+ }
+
+ 0x4: round_w({{ }});
+ 0x5: trunc_w({{ }});
+ 0x6: ceil_w({{ }});
+ 0x7: floor_w({{ }});
+ }
+
+ 0x2: decode RS_LO {
+ 0x1: decode MOVCF {
+ 0x0: movf_fmt({{ }});
+ 0x1: movt_fmt({{ }});
+ }
+
+ 0x2: movz({{ }});
+ 0x3: movn({{ }});
+
+ format mode64 {
+ 0x2: recip({{ }});
+ 0x3: rsqrt{{ }});
+ }
+ }
+
+ 0x4: decode RS_LO {
+ 0x1: cvt_d({{ }});
+ 0x4: cvt_w({{ }});
+
+ //only legal for 64 bit
+ format mode64 {
+ 0x5: cvt_l({{ }});
+ 0x6: cvt_ps({{ }});
+ }
+ }
+ }
+
+ //Table A-15 MIPS32 COP1 Encoding of Function Field When rs=D
+ 0x1: decode RS_HI {
+ 0x0: decode RS_LO {
+ 0x0: add_fmt({{ }});
+ 0x1: sub_fmt({{ }});
+ 0x2: mul_fmt({{ }});
+ 0x3: div_fmt({{ }});
+ 0x4: sqrt_fmt({{ }});
+ 0x5: abs_fmt({{ }});
+ 0x6: mov_fmt({{ }});
+ 0x7: neg_fmt({{ }});
+ }
+
+ 0x1: decode RS_LO {
+ //only legal for 64 bit
+ format mode64 {
+ 0x0: round_l({{ }});
+ 0x1: trunc_l({{ }});
+ 0x2: ceil_l({{ }});
+ 0x3: floor_l({{ }});
+ }
+
+ 0x4: round_w({{ }});
+ 0x5: trunc_w({{ }});
+ 0x6: ceil_w({{ }});
+ 0x7: floor_w({{ }});
+ }
+
+ 0x2: decode RS_LO {
+ 0x1: decode MOVCF {
+ 0x0: movf_fmt({{ }});
+ 0x1: movt_fmt({{ }});
+ }
+
+ 0x2: movz({{ }});
+ 0x3: movn({{ }});
+
+ format mode64 {
+ 0x5: recip({{ }});
+ 0x6: rsqrt{{ }});
+ }
+ }
+
+ 0x4: decode RS_LO {
+ 0x0: cvt_s({{ }});
+ 0x4: cvt_w({{ }});
+
+ //only legal for 64 bit
+ format mode64 {
+ 0x5: cvt_l({{ }});
+ }
+ }
+ }
+
+ //Table A-16 MIPS32 COP1 Encoding of Function Field When rs=W
+ 0x4: decode FUNCTION {
+ 0x10: cvt_s({{ }});
+ 0x10: cvt_d({{ }});
+ }
+
+ //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 {
+ 0x10: cvt_s({{ }});
+ 0x11: cvt_d({{ }});
+ }
+
+ //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 {
+ 0x0: add_fmt({{ }});
+ 0x1: sub_fmt({{ }});
+ 0x2: mul_fmt({{ }});
+ 0x5: abs_fmt({{ }});
+ 0x6: mov_fmt({{ }});
+ 0x7: neg_fmt({{ }});
+ }
+
+ 0x2: decode RS_LO {
+ 0x1: decode MOVCF {
+ 0x0: movf_fmt({{ }});
+ 0x1: movt_fmt({{ }});
+ }
+
+ 0x2: movz({{ }});
+ 0x3: movn({{ }});
+ }
+
+ 0x4: decode RS_LO {
+ 0x0: cvt_s_pu({{ }});
+ }
+
+ 0x5: decode RS_LO {
+ 0x0: cvt_s_pl({{ }});
+ 0x4: pll_s_pl({{ }});
+ 0x5: plu_s_pl({{ }});
+ 0x6: pul_s_pl({{ }});
+ 0x7: puu_s_pl({{ }});
+ }
+ }
+ }
+
+ //Table A-19 MIPS32 COP2 Encoding of rs Field
+ 0x2: decode RS_MSB {
+ 0x0: decode RS_HI {
+ 0x0: decode RS_LO {
+ 0x0: mfc2({{ }});
+ 0x2: cfc2({{ }});
+ 0x3: mfhc2({{ }});
+ 0x4: mtc2({{ }});
+ 0x6: ctc2({{ }});
+ 0x7: mftc2({{ }});
+ }
+
+ 0x1: decode ND {
+ 0x0: decode TF {
+ 0x0: bc2f({{ }});
+ 0x1: bc2t({{ }});
+ }
+
+ 0x1: decode TF {
+ 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 {
+ 0x0: lwxc1({{ }});
+ 0x1: ldxc1({{ }});
+ 0x5: luxc1({{ }});
+ }
+
+ 0x1: decode FUNCTION_LO {
+ 0x0: swxc1({{ }});
+ 0x1: sdxc1({{ }});
+ 0x5: suxc1({{ }});
+ 0x7: prefx({{ }});
+ }
+
+ 0x3: alnv_ps({{ }});
+
+ 0x4: decode FUNCTION_LO {
+ 0x0: madd_s({{ }});
+ 0x1: madd_d({{ }});
+ 0x6: madd_ps({{ }});
+ }
+
+ 0x5: decode FUNCTION_LO {
+ 0x0: msub_s({{ }});
+ 0x1: msub_d({{ }});
+ 0x6: msub_ps({{ }});
+ }
+
+ 0x6: decode FUNCTION_LO {
+ 0x0: nmadd_s({{ }});
+ 0x1: nmadd_d({{ }});
+ 0x6: nmadd_ps({{ }});
+ }
+
+ 0x7: decode FUNCTION_LO {
+ 0x0: nmsub_s({{ }});
+ 0x1: nmsub_d({{ }});
+ 0x6: nmsub_ps({{ }});
+ }
+ }
+
+ //MIPS obsolete instructions
+ 0x4: beql({{ }});
+ 0x5: bnel({{ }});
+ 0x6: blezl({{ }});
+ 0x7: bgtzl({{ }});
+ };
+
+ 0x3: decode OPCODE_LO default FailUnimpl::reserved(){
+
+ //Table A-5 MIPS32 SPECIAL2 Encoding of Function Field
+ 0x4: decode FUNCTION_HI {
+
+ 0x0: decode FUNCTION_LO {
+ 0x0: madd({{ }});
+ 0x1: maddu({{ }});
+ 0x2: mult({{ }});
+ 0x4: msub({{ }});
+ 0x5: msubu({{ }});
+ }
+
+ 0x4: decode FUNCTION_LO {
+ 0x0: clz({{ }});
+ 0x1: clo({{ }});
+ }
+
+ 0x7: decode FUNCTION_LO {
+ 0x7: sdbbp({{ }});
+ }
+ }
+
+ //Table A-6 MIPS32 SPECIAL3 Encoding of Function Field for Release 2 of the Architecture
+ 0x7: decode FUNCTION_HI {
+
+ 0x0: decode FUNCTION_LO {
+ 0x1: ext({{ }});
+ 0x4: ins({{ }});
+ }
+
+ //Table A-10 MIPS32 BSHFL Encoding of sa Field
+ 0x4: decode SA {
+ 0x02: wsbh({{ }});
+ 0x10: seb({{ }});
+ 0x18: seh({{ }});
+ }
+
+ 0x6: decode FUNCTION_LO {
+ 0x7: rdhwr({{ }});
+ }
+ }
+ };
+
+ 0x4: decode OPCODE_LO default FailUnimpl::reserved(){
+ format LoadMemory{
+ 0x0: lb({{ }});
+ 0x1: lh({{ }});
+ 0x2: lwl({{ }});
+ 0x3: lw({{ }});
+ 0x4: lbu({{ }});
+ 0x5: lhu({{ }});
+ 0x6: lhu({{ }});
+ };
+
+ 0x7: FailUnimpl::reserved({{ }});
+ };
+
+ 0x5: decode OPCODE_LO default FailUnimpl::reserved(){
+ format StoreMemory{
+ 0x0: sb({{ }});
+ 0x1: sh({{ }});
+ 0x2: swl({{ }});
+ 0x3: sw({{ }});
+ 0x6: swr({{ }});
+ };
+
+ format FailUnimpl{
+ 0x4: reserved({{ }});
+ 0x5: reserved({{ }});
+ 0x7: cache({{ }});
+ };
+
+ };
+
+ 0x6: decode OPCODE_LO default FailUnimpl::reserved(){
+ format LoadMemory{
+ 0x0: ll({{ }});
+ 0x1: lwc1({{ }});
+ 0x5: ldc1({{ }});
+ };
+ };
+
+ 0x7: decode OPCODE_LO default FailUnimpl::reserved(){
+ format StoreMemory{
+ 0x0: sc({{ }});
+ 0x1: swc1({{ }});
+ 0x5: sdc1({{ }});
+ };
+
+ }
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-29 17:36:22 +0000