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This commit is contained in:
Antoni Piasecki
2026-03-05 15:24:40 +01:00
parent d0659f9f8b
commit 3d14448de7
4 changed files with 125 additions and 15 deletions
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57
riscv64_dis.h
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@@ -87,6 +87,8 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
printf("bge %s, %s, %d\n", REGS[rs1], REGS[rs2], imm);
} else if (funct3 == 0b110) {
printf("bltu %s, %s, %d\n", REGS[rs1], REGS[rs2], imm);
} else if (funct3 == 0b111) {
printf("bgeu %s, %s, %d\n", REGS[rs1], REGS[rs2], imm);
} else {
fprintf(stderr, "B-type: unrecognized funct3: %03b\n", funct3);
exit(1);
@@ -108,6 +110,8 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
funct6);
exit(1);
}
} else if (funct3 == 0b010) {
printf("slti %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
} else if (funct3 == 0b011) {
printf("sltiu %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
} else if (funct3 == 0b100) {
@@ -126,6 +130,8 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
funct6);
exit(1);
}
} else if (funct3 == 0b110) {
printf("ori %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
} else if (funct3 == 0b111) {
printf("andi %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
} else {
@@ -146,6 +152,10 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
printf("ld %s, %d(%s)\n", REGS[rd], imm, REGS[rs1]);
} else if (funct3 == 0b100) {
printf("lbu %s, %d(%s)\n", REGS[rd], imm, REGS[rs1]);
} else if (funct3 == 0b101) {
printf("lhu %s, %d(%s)\n", REGS[rd], imm, REGS[rs1]);
} else if (funct3 == 0b110) {
printf("lwu %s, %d(%s)\n", REGS[rd], imm, REGS[rs1]);
} else {
fprintf(stderr, "I-type 2: unrecognized funct3: %03b\n", funct3);
exit(1);
@@ -189,7 +199,9 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
exit(1);
}
} else if (funct3 == 0b001) {
if (funct7 == 0b0000001) {
if (funct7 == 0b0000000) {
printf("sll %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct7 == 0b0000001) {
printf("mulh %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else {
fprintf(stderr, "R-type 1: funct3=0b001: unrecognized funct7: %b\n",
@@ -224,6 +236,18 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
funct7);
exit(1);
}
} else if (funct3 == 0b101) {
if (funct7 == 0b0000000) {
printf("srl %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct7 == 0b0000001) {
printf("divu %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct7 == 0b0100000) {
printf("sra %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else {
fprintf(stderr, "R-type 1: funct3=0b101: unrecognized funct7: %b\n",
funct7);
exit(1);
}
} else if (funct3 == 0b110) {
if (funct7 == 0b0000001) {
printf("rem %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
@@ -250,7 +274,7 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
}
}; break;
case 0b0101111:
fprintf(stderr, "R-type 2: unimplemented\n");
fprintf(stderr, "A extension not implemented yet.\n");
exit(1);
case 0b0111011: {
PARSE_R_INS(ins);
@@ -266,16 +290,24 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
funct7);
exit(1);
}
} else if (funct3 == 0b001) {
printf("sllw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct3 == 0b100) {
printf("divw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct3 == 0b101) {
if (funct7 == 0b0000001) {
if (funct7 == 0b0000000) {
printf("srlw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct7 == 0b0100000) {
printf("sraw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct7 == 0b0000001) {
printf("divuw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else {
fprintf(stderr, "R-type 3: funct3=101: unrecognized funct7: %b\n",
funct7);
exit(1);
}
} else if (funct3 == 0b110) {
printf("remw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else if (funct3 == 0b111) {
printf("remuw %s, %s, %s\n", REGS[rd], REGS[rs1], REGS[rs2]);
} else {
@@ -289,13 +321,28 @@ void riscv64_disassemble_one(const RISCV64 *r) { // NOLINT
PARSE_I_INS(ins);
printf("addiw %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
} else if (funct3 == 0b001) {
PARSE_I_INS(ins);
printf("slliw %s, %s, %d\n", REGS[rd], REGS[rs1], imm);
PARSE_R_INS(ins);
printf("slliw %s, %s, %d\n", REGS[rd], REGS[rs1], rs2);
} else if (funct3 == 0b101) {
PARSE_R_INS(ins);
if (funct7 == 0b0000000) {
printf("srliw %s, %s, %d\n", REGS[rd], REGS[rs1], rs2);
} else if (funct7 == 0b0100000) {
printf("sraiw %s, %s, %d\n", REGS[rd], REGS[rs1], rs2);
} else {
fprintf(stderr, "R-type 4: funct3=101: unrecognized funct7: %b\n",
funct7);
exit(1);
}
} else {
fprintf(stderr, "R-type 4: unrecognized funct3: %03b\n", funct3);
exit(1);
}
}; break;
case 0b0100111: {
fprintf(stderr, "F extension not implemented yet.\n");
exit(1);
}; break;
case 0b0100011: {
PARSE_S_INS(ins);