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| author | Aryadev Chavali <aryadev@aryadevchavali.com> | 2023-11-01 18:08:11 +0000 |
|---|---|---|
| committer | Aryadev Chavali <aryadev@aryadevchavali.com> | 2023-11-01 18:08:11 +0000 |
| commit | 4be04d2518fc342300685fa11d514beb7e06022b (patch) | |
| tree | 767526ce39fae75685d3388d506f8a1e3e26eb5c | |
| parent | c244e7c4a4d8a069d5ebae523880aa4356b0ff07 (diff) | |
| download | ovm-4be04d2518fc342300685fa11d514beb7e06022b.tar.gz ovm-4be04d2518fc342300685fa11d514beb7e06022b.tar.bz2 ovm-4be04d2518fc342300685fa11d514beb7e06022b.zip | |
Introduced a new mathematical operator MULT
Thankfully multiplication, like addition, is the same under 2s
complement as it is for unsigned numbers. So I just need to implement
those versions to be fine.
| -rw-r--r-- | lib/inst.c | 16 | ||||
| -rw-r--r-- | lib/inst.h | 5 |
2 files changed, 17 insertions, 4 deletions
@@ -194,6 +194,14 @@ const char *opcode_as_cstr(opcode_t code) break; case OP_PLUS_WORD: return "PLUS_WORD"; + case OP_MULT_BYTE: + return "MULT_BYTE"; + break; + case OP_MULT_HWORD: + return "MULT_HWORD"; + break; + case OP_MULT_WORD: + return "MULT_WORD"; break; case OP_JUMP_ABS: return "JUMP_ABS"; @@ -261,7 +269,7 @@ void data_print(data_t datum, data_type_t type, FILE *fp) void inst_print(inst_t instruction, FILE *fp) { - static_assert(NUMBER_OF_OPCODES == 70, "inst_bytecode_size: Out of date"); + static_assert(NUMBER_OF_OPCODES == 73, "inst_bytecode_size: Out of date"); fprintf(fp, "%s(", opcode_as_cstr(instruction.opcode)); if (OPCODE_IS_TYPE(instruction.opcode, OP_PUSH)) { @@ -291,7 +299,7 @@ void inst_print(inst_t instruction, FILE *fp) size_t inst_bytecode_size(inst_t inst) { - static_assert(NUMBER_OF_OPCODES == 70, "inst_bytecode_size: Out of date"); + static_assert(NUMBER_OF_OPCODES == 73, "inst_bytecode_size: Out of date"); size_t size = 1; // for opcode if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH)) { @@ -315,7 +323,7 @@ size_t inst_bytecode_size(inst_t inst) void inst_write_bytecode(inst_t inst, darr_t *darr) { - static_assert(NUMBER_OF_OPCODES == 70, "inst_write_bytecode: Out of date"); + static_assert(NUMBER_OF_OPCODES == 73, "inst_write_bytecode: Out of date"); // Append opcode darr_append_byte(darr, inst.opcode); // Then append 0 or more operands @@ -388,7 +396,7 @@ data_t read_type_from_darr(darr_t *darr, data_type_t type) inst_t inst_read_bytecode(darr_t *darr) { - static_assert(NUMBER_OF_OPCODES == 70, "inst_read_bytecode: Out of date"); + static_assert(NUMBER_OF_OPCODES == 73, "inst_read_bytecode: Out of date"); if (darr->used >= darr->available) return (inst_t){0}; inst_t inst = {0}; @@ -98,6 +98,10 @@ typedef enum OP_PLUS_HWORD, OP_PLUS_WORD, + OP_MULT_BYTE, + OP_MULT_HWORD, + OP_MULT_WORD, + // Simple I/O OP_PRINT_BYTE, OP_PRINT_CHAR, @@ -176,6 +180,7 @@ inst_t *insts_read_bytecode_file(FILE *, size_t *); #define INST_GT(TYPE) ((inst_t){.opcode = OP_GT_##TYPE}) #define INST_GTE(TYPE) ((inst_t){.opcode = OP_GTE_##TYPE}) #define INST_PLUS(TYPE) ((inst_t){.opcode = OP_PLUS_##TYPE}) +#define INST_MULT(TYPE) ((inst_t){.opcode = OP_MULT_##TYPE}) #define INST_JUMP_ABS(OP) \ ((inst_t){.opcode = OP_JUMP_ABS, .operand = DWORD(OP)}) |