diff options
Diffstat (limited to 'py/asmx64.c')
| -rw-r--r-- | py/asmx64.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/py/asmx64.c b/py/asmx64.c index 2389aad44..271c9f0fb 100644 --- a/py/asmx64.c +++ b/py/asmx64.c @@ -76,6 +76,7 @@ #define OPCODE_TEST_R64_WITH_RM64 (0x85) /* /r */ #define OPCODE_JMP_REL8 (0xeb) #define OPCODE_JMP_REL32 (0xe9) +#define OPCODE_JMP_RM64 (0xff) /* /4 */ #define OPCODE_JCC_REL8 (0x70) /* | jcc type */ #define OPCODE_JCC_REL32_A (0x0f) #define OPCODE_JCC_REL32_B (0x80) /* | jcc type */ @@ -481,6 +482,11 @@ void asm_x64_setcc_r8(asm_x64_t *as, int jcc_type, int dest_r8) { asm_x64_write_byte_3(as, OPCODE_SETCC_RM8_A, OPCODE_SETCC_RM8_B | jcc_type, MODRM_R64(0) | MODRM_RM_REG | MODRM_RM_R64(dest_r8)); } +void asm_x64_jmp_reg(asm_x64_t *as, int src_r64) { + assert(src_r64 < 8); + asm_x64_write_byte_2(as, OPCODE_JMP_RM64, MODRM_R64(4) | MODRM_RM_REG | MODRM_RM_R64(src_r64)); +} + STATIC mp_uint_t get_label_dest(asm_x64_t *as, mp_uint_t label) { assert(label < as->base.max_num_labels); return as->base.label_offsets[label]; @@ -582,6 +588,14 @@ void asm_x64_mov_local_addr_to_r64(asm_x64_t *as, int local_num, int dest_r64) { } } +void asm_x64_mov_reg_pcrel(asm_x64_t *as, int dest_r64, mp_uint_t label) { + assert(dest_r64 < 8); + mp_uint_t dest = get_label_dest(as, label); + mp_int_t rel = dest - (as->base.code_offset + 7); + asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_LEA_MEM_TO_R64, MODRM_R64(dest_r64) | MODRM_RM_R64(5)); + asm_x64_write_word32(as, rel); +} + /* void asm_x64_push_local(asm_x64_t *as, int local_num) { asm_x64_push_disp(as, ASM_X64_REG_RBP, asm_x64_local_offset_from_ebp(as, local_num)); |