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-rw-r--r--arch/mips/isa/decoder.def195
1 files changed, 111 insertions, 84 deletions
diff --git a/arch/mips/isa/decoder.def b/arch/mips/isa/decoder.def
index 49066c9bf..8453b542c 100644
--- a/arch/mips/isa/decoder.def
+++ b/arch/mips/isa/decoder.def
@@ -18,31 +18,37 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x0: decode FUNCTION_LO {
0x1: decode MOVCI {
format Move {
- 0: movc({{ }});
- 1: movt({{ }});
+ 0: movf({{ if( FPConditionCode(CC) == 0) Rd = Rs}});
+ 1: movt({{ if( FPConditionCode(CC) == 1) Rd = Rs}});
}
}
- format ShiftRotate {
+ 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: sll({{ }});
+
+ 0x0: sll({{ Rd = Rt.uw << SA; }});
0x2: decode SRL {
- 0: srl({{ }});
- 1: rotr({{ }});
+ 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: sar({{ }});
-
- 0x4: sllv({{ }});
+ 0x3: sra({{ Rd = Rt.sw >> SA; }});
+
+ 0x4: sllv({{ Rd = Rt.uw << Rs<4:0>; }});
0x6: decode SRLV {
- 0: srlv({{ }});
- 1: rotrv({{ }});
+ 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({{ }});
+ 0x7: srav({{ Rd = Rt.sw >> Rs<4:0>; }});
}
}
@@ -51,22 +57,24 @@ decode OPCODE_HI default FailUnimpl::unknown() {
//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({{ }});
+ 0x0: jr(IsReturn);
+ 0x1: jalr(IsCall,IsReturn);
}
format Move {
- 0x2: movz({{ }});
- 0x3: movn({{ }});
+ 0x2: movz({{ if (Rt == 0) Rd = Rs; }});
+ 0x3: movn({{ if (Rt != 0) Rd = Rs; }});
}
- 0x4: Syscall::syscall({{ }});
- 0x5: Break::break({{ }});
- 0x7: Synchronize::synch({{ }});
+ format Trap {
+ 0x4: Syscall::syscall({{ xc->syscall()}},IsNonSpeculative);
+ 0x5: Break::break({{ }});
+ 0x7: Synchronize::sync({{ }});
+ }
}
0x2: decode FUNCTION_LO {
- format MultDiv {
+ format IntOp {
0x0: mfhi({{ }});
0x1: mthi({{ }});
0x2: mflo({{ }});
@@ -75,34 +83,31 @@ decode OPCODE_HI default FailUnimpl::unknown() {
};
0x3: decode FUNCTION_LO {
- format MultDiv {
- 0x0: mult({{ }});
- 0x1: multu({{ }});
- 0x2: div({{ }});
- 0x3: divu({{ }});
+ format IntOp {
+ 0x0: mult({{ Rd.sw = Rs.sw * Rt.sw; }});
+ 0x1: multu({{ Rd.sw = Rs.uw * Rt.uw;}});
+ 0x2: div({{ Rd.sw = Rs.sw / Rt.sw;}});
+ 0x3: divu({{ Rd.sw = Rs.sw / Rt.uw;}});
}
};
0x4: decode FUNCTION_LO {
- format Arithmetic {
- 0x0: add({{ }});
- 0x1: addu({{ }});
- 0x2: sub({{ }});
- 0x3: subu({{ }});
- }
-
- format Logical {
- 0x0: and({{ }});
- 0x1: or({{ }});
- 0x2: xor({{ }});
- 0x3: nor({{ }});
+ format IntOp {
+ 0x0: add({{ Rd.sw = Rs.sw + Rt.sw;}});
+ 0x1: addu({{ Rd.uw = Rs.uw + Rt.uw;}});
+ 0x2: sub({{ Rd.sw = Rs.sw - Rt.sw;}});
+ 0x3: subu({{ Rd.uw = Rs.uw - Rt.uw;}});
+ 0x4: and({{ Rd.sw = Rs.uw & Rt.uw;}});
+ 0x5: or({{ Rd.sw = Rs.uw | Rt.uw;}});
+ 0x6: xor({{ Rd.sw = Rs.uw ^ Rt.uw;}});
+ 0x7: nor({{ Rd.sw = ~(Rs.uw | Rt.uw);}});
}
}
0x5: decode FUNCTION_LO {
- format SetInstructions{
- 0x2: slt({{ }});
- 0x3: sltu({{ }});
+ format IntOp{
+ 0x2: slt({{ Rd.sw = ( Rs.sw < Rt.sw ) ? 1 : 0}});
+ 0x3: sltu({{ Rd.uw = ( Rs.uw < Rt.uw ) ? 1 : 0}});
}
};
@@ -153,13 +158,15 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
0x3: decode REGIMM_LO {
- 0x7: synci({{ }});
+ format Trap {
+ 0x7: synci({{ }});
+ }
}
}
format Jump {
- 0x2: j({{ }});
- 0x3: jal({{ }});
+ 0x2: j();
+ 0x3: jal(IsCall);
}
format Branch {
@@ -171,14 +178,17 @@ decode OPCODE_HI default FailUnimpl::unknown() {
};
0x1: decode OPCODE_LO default FailUnimpl::reserved(){
- format IntImmediate {
- 0x0: addi({{ }});
- 0x1: addiu({{ }});
- 0x2: slti({{ }});
- 0x3: sltiu({{ }});
- 0x4: andi({{ }});
- 0x5: ori({{ }});
- 0x6: xori({{ }});
+ format IntOp {
+ 0x0: addi({{ Rt.sw = Rs.sw + INTIMM; }});
+ 0x1: addiu({{ Rt.uw = Rs.uw + INTIMM;}});
+ 0x2: slti({{ Rt.sw = ( Rs.sw < INTIMM ) ? 1 : 0 }});
+ 0x3: sltiu({{ Rt.uw = ( Rs.uw < INTIMM ) ? 1 : 0 }});
+ 0x4: andi({{ Rt.sw = Rs.sw & INTIMM;}});
+ 0x5: ori({{ Rt.sw = Rs.sw | INTIMM;}});
+ 0x6: xori({{ Rt.sw = Rs.sw ^ INTIMM;}});
+ };
+
+ format Memory {
0x7: lui({{ }});
};
};
@@ -193,8 +203,10 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0xA: rdpgpr({{ }});
0xB: decode SC {
- 0x0: di({{ }});
- 0x1: ei({{ }});
+ format BasicOp {
+ 0x0: di({{ }});
+ 0x1: ei({{ }});
+ }
}
0xE: wrpgpr({{ }});
@@ -202,13 +214,18 @@ decode OPCODE_HI default FailUnimpl::unknown() {
//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({{ }});
+ format Trap {
+ 0x01: tlbr({{ }});
+ 0x02: tlbwi({{ }});
+ 0x06: tlbwr({{ }});
+ 0x08: tlbp({{ }});
+ }
+
+ format BasicOp {
+ 0x18: eret({{ }});
+ 0x1F: deret({{ }});
+ 0x20: wait({{ }});
+ }
}
}
@@ -227,13 +244,17 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x1: decode ND {
0x0: decode TF {
- 0x0: bc1f({{ }});
- 0x1: bc1t({{ }});
+ format Branch {
+ 0x0: bc1f({{ }});
+ 0x1: bc1t({{ }});
+ }
}
0x1: decode TF {
- 0x0: bc1fl({{ }});
- 0x1: bc1tl({{ }});
+ format Branch {
+ 0x0: bc1fl({{ }});
+ 0x1: bc1tl({{ }});
+ }
}
}
}
@@ -276,8 +297,10 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x1: movt_fmt({{ }});
}
- 0x2: movz({{ }});
- 0x3: movn({{ }});
+ format Move {
+ 0x2: movz({{ if (Rt == 0) Rd = Rs; }});
+ 0x3: movn({{ if (Rt != 0) Rd = Rs; }});
+ }
format mode64 {
0x2: recip({{ }});
@@ -331,8 +354,10 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x1: movt_fmt({{ }});
}
- 0x2: movz({{ }});
- 0x3: movn({{ }});
+ format Move {
+ 0x2: movz({{ if (Rt == 0) Rd = Rs; }});
+ 0x3: movn({{ if (Rt != 0) Rd = Rs; }});
+ }
format mode64 {
0x5: recip({{ }});
@@ -384,8 +409,6 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x1: movt_fmt({{ }});
}
- 0x2: movz({{ }});
- 0x3: movn({{ }});
}
0x4: decode RS_LO {
@@ -416,13 +439,17 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x1: decode ND {
0x0: decode TF {
- 0x0: bc2f({{ }});
- 0x1: bc2t({{ }});
+ format Branch {
+ 0x0: bc2f({{ }});
+ 0x1: bc2t({{ }});
+ }
}
0x1: decode TF {
- 0x0: bc2fl({{ }});
- 0x1: bc2tl({{ }});
+ format Branch {
+ 0x0: bc2fl({{ }});
+ 0x1: bc2tl({{ }});
+ }
}
}
}
@@ -479,7 +506,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x7: bgtzl({{ }});
};
- 0x3: decode OPCODE_LO default FailUnimpl::reserved(){
+ 0x3: decode OPCODE_LO default FailUnimpl::reserved() {
//Table A-5 MIPS32 SPECIAL2 Encoding of Function Field
0x4: decode FUNCTION_HI {
@@ -523,8 +550,8 @@ decode OPCODE_HI default FailUnimpl::unknown() {
}
};
- 0x4: decode OPCODE_LO default FailUnimpl::reserved(){
- format LoadMemory{
+ 0x4: decode OPCODE_LO default FailUnimpl::reserved() {
+ format Memory {
0x0: lb({{ }});
0x1: lh({{ }});
0x2: lwl({{ }});
@@ -537,8 +564,8 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x7: FailUnimpl::reserved({{ }});
};
- 0x5: decode OPCODE_LO default FailUnimpl::reserved(){
- format StoreMemory{
+ 0x5: decode OPCODE_LO default FailUnimpl::reserved() {
+ format Memory {
0x0: sb({{ }});
0x1: sh({{ }});
0x2: swl({{ }});
@@ -546,7 +573,7 @@ decode OPCODE_HI default FailUnimpl::unknown() {
0x6: swr({{ }});
};
- format FailUnimpl{
+ format FailUnimpl {
0x4: reserved({{ }});
0x5: reserved({{ }});
0x7: cache({{ }});
@@ -554,16 +581,16 @@ decode OPCODE_HI default FailUnimpl::unknown() {
};
- 0x6: decode OPCODE_LO default FailUnimpl::reserved(){
- format LoadMemory{
+ 0x6: decode OPCODE_LO default FailUnimpl::reserved() {
+ format Memory {
0x0: ll({{ }});
0x1: lwc1({{ }});
0x5: ldc1({{ }});
};
};
- 0x7: decode OPCODE_LO default FailUnimpl::reserved(){
- format StoreMemory{
+ 0x7: decode OPCODE_LO default FailUnimpl::reserved() {
+ format Memory {
0x0: sc({{ }});
0x1: swc1({{ }});
0x5: sdc1({{ }});
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-16 05:55:04 +0000