2014-01-27 21:53:28 +00:00
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#include <stdint.h>
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2013-10-04 18:53:11 +00:00
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#include <stdio.h>
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#include <assert.h>
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#include <string.h>
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#include "misc.h"
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2014-01-04 13:55:24 +00:00
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#include "mpconfig.h"
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// wrapper around everything in this file
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#if MICROPY_EMIT_X64
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2013-10-04 18:53:11 +00:00
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2014-01-07 15:20:33 +00:00
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#include <sys/types.h>
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#include <sys/mman.h>
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#include "asmx64.h"
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2014-01-02 20:28:12 +00:00
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#if defined(__OpenBSD__) || defined(__MACH__)
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2014-01-01 23:16:27 +00:00
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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2013-10-04 18:53:11 +00:00
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/* all offsets are measured in multiples of 8 bytes */
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#define WORD_SIZE (8)
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#define OPCODE_NOP (0x90)
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#define OPCODE_PUSH_R64 (0x50)
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#define OPCODE_PUSH_I64 (0x68)
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#define OPCODE_PUSH_M64 (0xff) /* /6 */
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#define OPCODE_POP_R64 (0x58)
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#define OPCODE_RET (0xc3)
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#define OPCODE_MOV_I8_TO_R8 (0xb0) /* +rb */
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#define OPCODE_MOV_I64_TO_R64 (0xb8)
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#define OPCODE_MOV_I32_TO_RM32 (0xc7)
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#define OPCODE_MOV_R64_TO_RM64 (0x89)
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#define OPCODE_MOV_RM64_TO_R64 (0x8b)
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#define OPCODE_LEA_MEM_TO_R64 (0x8d) /* /r */
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#define OPCODE_XOR_R64_TO_RM64 (0x31) /* /r */
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#define OPCODE_ADD_R64_TO_RM64 (0x01)
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#define OPCODE_ADD_I32_TO_RM32 (0x81) /* /0 */
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#define OPCODE_ADD_I8_TO_RM32 (0x83) /* /0 */
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#define OPCODE_SUB_R64_FROM_RM64 (0x29)
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#define OPCODE_SUB_I32_FROM_RM64 (0x81) /* /5 */
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#define OPCODE_SUB_I8_FROM_RM64 (0x83) /* /5 */
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#define OPCODE_SHL_RM32_BY_I8 (0xc1) /* /4 */
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#define OPCODE_SHR_RM32_BY_I8 (0xc1) /* /5 */
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#define OPCODE_SAR_RM32_BY_I8 (0xc1) /* /7 */
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#define OPCODE_CMP_I32_WITH_RM32 (0x81) /* /7 */
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#define OPCODE_CMP_I8_WITH_RM32 (0x83) /* /7 */
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#define OPCODE_CMP_R64_WITH_RM64 (0x39)
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#define OPCODE_CMP_RM32_WITH_R32 (0x3b)
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#define OPCODE_TEST_R8_WITH_RM8 (0x84) /* /r */
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#define OPCODE_JMP_REL8 (0xeb)
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#define OPCODE_JMP_REL32 (0xe9)
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#define OPCODE_JCC_REL8 (0x70) /* | jcc type */
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#define OPCODE_JCC_REL32_A (0x0f)
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#define OPCODE_JCC_REL32_B (0x80) /* | jcc type */
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#define OPCODE_SETCC_RM8_A (0x0f)
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#define OPCODE_SETCC_RM8_B (0x90) /* | jcc type, /0 */
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#define OPCODE_CALL_REL32 (0xe8)
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#define OPCODE_CALL_RM32 (0xff) /* /2 */
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#define OPCODE_LEAVE (0xc9)
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#define MODRM_R64(x) ((x) << 3)
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#define MODRM_RM_DISP0 (0x00)
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#define MODRM_RM_DISP8 (0x40)
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#define MODRM_RM_DISP32 (0x80)
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#define MODRM_RM_REG (0xc0)
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#define MODRM_RM_R64(x) (x)
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#define REX_PREFIX (0x40)
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#define REX_W (0x08) // width
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#define REX_R (0x04) // register
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#define REX_X (0x02) // index
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#define REX_B (0x01) // base
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#define IMM32_L0(x) ((x) & 0xff)
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#define IMM32_L1(x) (((x) >> 8) & 0xff)
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#define IMM32_L2(x) (((x) >> 16) & 0xff)
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#define IMM32_L3(x) (((x) >> 24) & 0xff)
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#define IMM64_L4(x) (((x) >> 32) & 0xff)
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#define IMM64_L5(x) (((x) >> 40) & 0xff)
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#define IMM64_L6(x) (((x) >> 48) & 0xff)
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#define IMM64_L7(x) (((x) >> 56) & 0xff)
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#define UNSIGNED_FIT8(x) (((x) & 0xffffffffffffff00) == 0)
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#define UNSIGNED_FIT32(x) (((x) & 0xffffffff00000000) == 0)
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#define SIGNED_FIT8(x) (((x) & 0xffffff80) == 0) || (((x) & 0xffffff80) == 0xffffff80)
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struct _asm_x64_t {
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int pass;
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uint code_offset;
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uint code_size;
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byte *code_base;
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byte dummy_data[8];
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2013-10-05 12:44:41 +00:00
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uint max_num_labels;
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2013-10-04 18:53:11 +00:00
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int *label_offsets;
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2014-02-02 13:11:48 +00:00
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int num_locals;
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2013-10-04 18:53:11 +00:00
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};
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// for allocating memory, see src/v8/src/platform-linux.cc
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void *alloc_mem(uint req_size, uint *alloc_size, bool is_exec) {
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req_size = (req_size + 0xfff) & (~0xfff);
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int prot = PROT_READ | PROT_WRITE | (is_exec ? PROT_EXEC : 0);
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void *ptr = mmap(NULL, req_size, prot, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (ptr == MAP_FAILED) {
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assert(0);
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}
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*alloc_size = req_size;
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return ptr;
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}
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2014-02-02 13:11:48 +00:00
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asm_x64_t *asm_x64_new(uint max_num_labels) {
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asm_x64_t *as;
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2013-10-04 18:53:11 +00:00
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as = m_new(asm_x64_t, 1);
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as->pass = 0;
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as->code_offset = 0;
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as->code_size = 0;
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as->code_base = NULL;
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2013-10-05 12:44:41 +00:00
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as->max_num_labels = max_num_labels;
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as->label_offsets = m_new(int, max_num_labels);
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2014-02-02 13:11:48 +00:00
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as->num_locals = 0;
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2013-10-04 18:53:11 +00:00
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return as;
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}
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2014-02-02 13:11:48 +00:00
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void asm_x64_free(asm_x64_t *as, bool free_code) {
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2013-10-04 18:53:11 +00:00
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if (free_code) {
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2013-10-05 11:19:06 +00:00
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// need to un-mmap
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//m_free(as->code_base);
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2013-10-04 18:53:11 +00:00
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}
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/*
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if (as->label != NULL) {
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int i;
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for (i = 0; i < as->label->len; ++i)
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{
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Label* lab = &g_array_index(as->label, Label, i);
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if (lab->unresolved != NULL)
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g_array_free(lab->unresolved, true);
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}
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g_array_free(as->label, true);
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}
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*/
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2013-12-29 19:33:23 +00:00
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m_del_obj(asm_x64_t, as);
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2013-10-04 18:53:11 +00:00
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}
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void asm_x64_start_pass(asm_x64_t *as, int pass) {
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as->pass = pass;
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as->code_offset = 0;
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2013-10-05 12:44:41 +00:00
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if (pass == ASM_X64_PASS_2) {
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// reset all labels
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memset(as->label_offsets, -1, as->max_num_labels * sizeof(int));
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2013-10-04 18:53:11 +00:00
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}
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}
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void asm_x64_end_pass(asm_x64_t *as) {
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2013-10-05 12:44:41 +00:00
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if (as->pass == ASM_X64_PASS_2) {
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2013-10-04 18:53:11 +00:00
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// calculate size of code in bytes
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as->code_size = as->code_offset;
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2013-10-05 12:44:41 +00:00
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//as->code_base = m_new(byte, as->code_size); need to allocale executable memory
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uint actual_alloc;
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as->code_base = alloc_mem(as->code_size, &actual_alloc, true);
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2014-01-06 22:13:00 +00:00
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//printf("code_size: %u\n", as->code_size);
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2013-10-04 18:53:11 +00:00
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}
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/*
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// check labels are resolved
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if (as->label != NULL)
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{
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int i;
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for (i = 0; i < as->label->len; ++i)
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if (g_array_index(as->label, Label, i).unresolved != NULL)
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return false;
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}
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*/
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}
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// all functions must go through this one to emit bytes
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2014-02-12 16:31:30 +00:00
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STATIC byte *asm_x64_get_cur_to_write_bytes(asm_x64_t *as, int num_bytes_to_write) {
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2013-10-04 18:53:11 +00:00
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//printf("emit %d\n", num_bytes_to_write);
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if (as->pass < ASM_X64_PASS_3) {
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as->code_offset += num_bytes_to_write;
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return as->dummy_data;
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} else {
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assert(as->code_offset + num_bytes_to_write <= as->code_size);
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byte *c = as->code_base + as->code_offset;
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as->code_offset += num_bytes_to_write;
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return c;
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}
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}
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2014-02-02 13:11:48 +00:00
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uint asm_x64_get_code_size(asm_x64_t *as) {
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2013-10-04 18:53:11 +00:00
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return as->code_size;
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}
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2014-02-02 13:11:48 +00:00
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void *asm_x64_get_code(asm_x64_t *as) {
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2013-10-04 18:53:11 +00:00
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return as->code_base;
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}
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_byte_1(asm_x64_t *as, byte b1) {
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2013-10-04 18:53:11 +00:00
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byte* c = asm_x64_get_cur_to_write_bytes(as, 1);
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c[0] = b1;
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}
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_byte_2(asm_x64_t *as, byte b1, byte b2) {
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2013-10-04 18:53:11 +00:00
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byte* c = asm_x64_get_cur_to_write_bytes(as, 2);
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c[0] = b1;
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c[1] = b2;
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}
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_byte_3(asm_x64_t *as, byte b1, byte b2, byte b3) {
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2013-10-04 18:53:11 +00:00
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byte* c = asm_x64_get_cur_to_write_bytes(as, 3);
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c[0] = b1;
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c[1] = b2;
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c[2] = b3;
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}
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_word32(asm_x64_t *as, int w32) {
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2013-10-04 18:53:11 +00:00
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byte* c = asm_x64_get_cur_to_write_bytes(as, 4);
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c[0] = IMM32_L0(w32);
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c[1] = IMM32_L1(w32);
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c[2] = IMM32_L2(w32);
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c[3] = IMM32_L3(w32);
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}
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_word64(asm_x64_t *as, int64_t w64) {
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2013-10-04 18:53:11 +00:00
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byte* c = asm_x64_get_cur_to_write_bytes(as, 8);
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c[0] = IMM32_L0(w64);
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c[1] = IMM32_L1(w64);
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c[2] = IMM32_L2(w64);
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c[3] = IMM32_L3(w64);
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c[4] = IMM64_L4(w64);
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c[5] = IMM64_L5(w64);
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c[6] = IMM64_L6(w64);
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c[7] = IMM64_L7(w64);
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}
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/* unused
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_word32_to(asm_x64_t *as, int offset, int w32) {
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2013-10-04 18:53:11 +00:00
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byte* c;
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assert(offset + 4 <= as->code_size);
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c = as->code_base + offset;
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c[0] = IMM32_L0(w32);
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c[1] = IMM32_L1(w32);
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c[2] = IMM32_L2(w32);
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c[3] = IMM32_L3(w32);
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}
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*/
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2014-02-12 16:31:30 +00:00
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STATIC void asm_x64_write_r64_disp(asm_x64_t *as, int r64, int disp_r64, int disp_offset) {
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2013-10-04 18:53:11 +00:00
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assert(disp_r64 != REG_RSP);
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if (disp_offset == 0 && disp_r64 != REG_RBP) {
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asm_x64_write_byte_1(as, MODRM_R64(r64) | MODRM_RM_DISP0 | MODRM_RM_R64(disp_r64));
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} else if (SIGNED_FIT8(disp_offset)) {
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asm_x64_write_byte_2(as, MODRM_R64(r64) | MODRM_RM_DISP8 | MODRM_RM_R64(disp_r64), IMM32_L0(disp_offset));
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} else {
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asm_x64_write_byte_1(as, MODRM_R64(r64) | MODRM_RM_DISP32 | MODRM_RM_R64(disp_r64));
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asm_x64_write_word32(as, disp_offset);
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}
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}
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2014-02-02 13:11:48 +00:00
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void asm_x64_nop(asm_x64_t *as) {
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2013-10-04 18:53:11 +00:00
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asm_x64_write_byte_1(as, OPCODE_NOP);
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}
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2014-02-02 13:11:48 +00:00
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void asm_x64_push_r64(asm_x64_t *as, int src_r64) {
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2013-10-04 18:53:11 +00:00
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asm_x64_write_byte_1(as, OPCODE_PUSH_R64 | src_r64);
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}
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2014-02-02 13:11:48 +00:00
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void asm_x64_push_i32(asm_x64_t *as, int src_i32) {
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2013-10-04 18:53:11 +00:00
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asm_x64_write_byte_1(as, OPCODE_PUSH_I64);
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asm_x64_write_word32(as, src_i32); // will be sign extended to 64 bits
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}
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2014-02-02 13:11:48 +00:00
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void asm_x64_push_disp(asm_x64_t *as, int src_r64, int src_offset) {
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2013-10-04 18:53:11 +00:00
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asm_x64_write_byte_1(as, OPCODE_PUSH_M64);
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asm_x64_write_r64_disp(as, 6, src_r64, src_offset);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_pop_r64(asm_x64_t *as, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_1(as, OPCODE_POP_R64 | dest_r64);
|
|
|
|
}
|
|
|
|
|
2014-02-12 16:31:30 +00:00
|
|
|
STATIC void asm_x64_ret(asm_x64_t *as) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_1(as, OPCODE_RET);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_r32_to_r32(asm_x64_t *as, int src_r32, int dest_r32) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// defaults to 32 bit operation
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_MOV_R64_TO_RM64, MODRM_R64(src_r32) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_MOV_R64_TO_RM64, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_r64_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_2(as, REX_PREFIX | REX_W, OPCODE_MOV_R64_TO_RM64);
|
|
|
|
asm_x64_write_r64_disp(as, src_r64, dest_r64, dest_disp);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_disp_to_r64(asm_x64_t *as, int src_r64, int src_disp, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_2(as, REX_PREFIX | REX_W, OPCODE_MOV_RM64_TO_R64);
|
|
|
|
asm_x64_write_r64_disp(as, dest_r64, src_r64, src_disp);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_lea_disp_to_r64(asm_x64_t *as, int src_r64, int src_disp, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_2(as, REX_PREFIX | REX_W, OPCODE_LEA_MEM_TO_R64);
|
|
|
|
asm_x64_write_r64_disp(as, dest_r64, src_r64, src_disp);
|
|
|
|
}
|
|
|
|
|
|
|
|
void asm_x64_mov_i8_to_r8(asm_x64_t *as, int src_i8, int dest_r64) {
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_MOV_I8_TO_R8 | dest_r64, src_i8);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_i32_to_r64(asm_x64_t *as, int src_i32, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// cpu defaults to i32 to r64, with zero extension
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_MOV_I64_TO_R64 | dest_r64);
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_i64_to_r64(asm_x64_t *as, int64_t src_i64, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// cpu defaults to i32 to r64
|
|
|
|
// to mov i64 to r64 need to use REX prefix
|
|
|
|
asm_x64_write_byte_2(as, REX_PREFIX | REX_W, OPCODE_MOV_I64_TO_R64 | dest_r64);
|
|
|
|
asm_x64_write_word64(as, src_i64);
|
|
|
|
}
|
|
|
|
|
|
|
|
void asm_x64_mov_i64_to_r64_optimised(asm_x64_t *as, int64_t src_i64, int dest_r64) {
|
|
|
|
if (UNSIGNED_FIT32(src_i64)) {
|
|
|
|
// 5 bytes
|
|
|
|
asm_x64_mov_i32_to_r64(as, src_i64 & 0xffffffff, dest_r64);
|
|
|
|
} else {
|
|
|
|
// 10 bytes
|
|
|
|
asm_x64_mov_i64_to_r64(as, src_i64, dest_r64);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_i32_to_disp(asm_x64_t *as, int src_i32, int dest_r32, int dest_disp)
|
2013-10-04 18:53:11 +00:00
|
|
|
{
|
|
|
|
assert(0);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_MOV_I32_TO_RM32);
|
|
|
|
//asm_x64_write_r32_disp(as, 0, dest_r32, dest_disp);
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
|
|
|
|
void asm_x64_xor_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
|
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_XOR_R64_TO_RM64, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_add_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_ADD_R64_TO_RM64, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_add_i32_to_r32(asm_x64_t *as, int src_i32, int dest_r32)
|
2013-10-04 18:53:11 +00:00
|
|
|
{
|
|
|
|
assert(dest_r32 != REG_RSP); // in this case i think src_i32 must be 64 bits
|
|
|
|
if (SIGNED_FIT8(src_i32))
|
|
|
|
{
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_ADD_I8_TO_RM32, MODRM_R64(0) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
asm_x64_write_byte_1(as, src_i32 & 0xff);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_ADD_I32_TO_RM32, MODRM_R64(0) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_sub_r32_from_r32(asm_x64_t *as, int src_r32, int dest_r32) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// defaults to 32 bit operation
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_SUB_R64_FROM_RM64, MODRM_R64(src_r32) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_sub_r64_from_r64(asm_x64_t *as, int src_r64, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_SUB_R64_FROM_RM64, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_sub_i32_from_r32(asm_x64_t *as, int src_i32, int dest_r32) {
|
2013-10-04 18:53:11 +00:00
|
|
|
if (SIGNED_FIT8(src_i32)) {
|
|
|
|
// defaults to 32 bit operation
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_SUB_I8_FROM_RM64, MODRM_R64(5) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
asm_x64_write_byte_1(as, src_i32 & 0xff);
|
|
|
|
} else {
|
|
|
|
// defaults to 32 bit operation
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_SUB_I32_FROM_RM64, MODRM_R64(5) | MODRM_RM_REG | MODRM_RM_R64(dest_r32));
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_sub_i32_from_r64(asm_x64_t *as, int src_i32, int dest_r64) {
|
2013-10-04 18:53:11 +00:00
|
|
|
if (SIGNED_FIT8(src_i32)) {
|
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_SUB_I8_FROM_RM64, MODRM_R64(5) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
asm_x64_write_byte_1(as, src_i32 & 0xff);
|
|
|
|
} else {
|
|
|
|
// use REX prefix for 64 bit operation
|
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_SUB_I32_FROM_RM64, MODRM_R64(5) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* shifts not tested */
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_shl_r32_by_imm(asm_x64_t *as, int r32, int imm) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_2(as, OPCODE_SHL_RM32_BY_I8, MODRM_R64(4) | MODRM_RM_REG | MODRM_RM_R64(r32));
|
|
|
|
asm_x64_write_byte_1(as, imm);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_shr_r32_by_imm(asm_x64_t *as, int r32, int imm) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_2(as, OPCODE_SHR_RM32_BY_I8, MODRM_R64(5) | MODRM_RM_REG | MODRM_RM_R64(r32));
|
|
|
|
asm_x64_write_byte_1(as, imm);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_sar_r32_by_imm(asm_x64_t *as, int r32, int imm) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_2(as, OPCODE_SAR_RM32_BY_I8, MODRM_R64(7) | MODRM_RM_REG | MODRM_RM_R64(r32));
|
|
|
|
asm_x64_write_byte_1(as, imm);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_cmp_r64_with_r64(asm_x64_t *as, int src_r64_a, int src_r64_b) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_3(as, REX_PREFIX | REX_W, OPCODE_CMP_R64_WITH_RM64, MODRM_R64(src_r64_a) | MODRM_RM_REG | MODRM_RM_R64(src_r64_b));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_cmp_r32_with_disp(asm_x64_t *as, int src_r32_a, int src_r32_b, int src_disp_b) {
|
2013-10-04 18:53:11 +00:00
|
|
|
assert(0);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_CMP_R64_WITH_RM64);
|
|
|
|
//asm_x64_write_r32_disp(as, src_r32_a, src_r32_b, src_disp_b);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_cmp_disp_with_r32(asm_x64_t *as, int src_r32_a, int src_disp_a, int src_r32_b) {
|
2013-10-04 18:53:11 +00:00
|
|
|
assert(0);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_CMP_RM32_WITH_R32);
|
|
|
|
//asm_x64_write_r32_disp(as, src_r32_b, src_r32_a, src_disp_a);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_cmp_i32_with_r32(asm_x64_t *as, int src_i32, int src_r32) {
|
2013-10-04 18:53:11 +00:00
|
|
|
if (SIGNED_FIT8(src_i32)) {
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_CMP_I8_WITH_RM32, MODRM_R64(7) | MODRM_RM_REG | MODRM_RM_R64(src_r32));
|
|
|
|
asm_x64_write_byte_1(as, src_i32 & 0xff);
|
|
|
|
} else {
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_CMP_I32_WITH_RM32, MODRM_R64(7) | MODRM_RM_REG | MODRM_RM_R64(src_r32));
|
|
|
|
asm_x64_write_word32(as, src_i32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_test_r8_with_r8(asm_x64_t *as, int src_r64_a, int src_r64_b) {
|
2013-10-06 23:02:49 +00:00
|
|
|
// TODO implement for other registers
|
|
|
|
assert(src_r64_a == REG_RAX);
|
|
|
|
assert(src_r64_b == REG_RAX);
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_2(as, OPCODE_TEST_R8_WITH_RM8, MODRM_R64(src_r64_a) | MODRM_RM_REG | MODRM_RM_R64(src_r64_b));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_setcc_r8(asm_x64_t *as, int jcc_type, int dest_r8) {
|
2013-10-04 18:53:11 +00:00
|
|
|
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));
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_label_assign(asm_x64_t *as, int label) {
|
2013-10-05 12:44:41 +00:00
|
|
|
assert(label < as->max_num_labels);
|
|
|
|
if (as->pass == ASM_X64_PASS_2) {
|
|
|
|
// assign label offset
|
|
|
|
assert(as->label_offsets[label] == -1);
|
|
|
|
as->label_offsets[label] = as->code_offset;
|
|
|
|
} else if (as->pass == ASM_X64_PASS_3) {
|
|
|
|
// ensure label offset has not changed from PASS_2 to PASS_3
|
|
|
|
//printf("l%d: (at %d=%ld)\n", label, as->label_offsets[label], as->code_offset);
|
|
|
|
assert(as->label_offsets[label] == as->code_offset);
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-12 16:31:30 +00:00
|
|
|
STATIC int get_label_dest(asm_x64_t *as, int label) {
|
2013-10-05 12:44:41 +00:00
|
|
|
assert(label < as->max_num_labels);
|
|
|
|
return as->label_offsets[label];
|
|
|
|
}
|
|
|
|
|
|
|
|
void asm_x64_jmp_label(asm_x64_t *as, int label) {
|
|
|
|
int dest = get_label_dest(as, label);
|
|
|
|
int rel = dest - as->code_offset;
|
|
|
|
if (dest >= 0 && rel < 0) {
|
|
|
|
// is a backwards jump, so we know the size of the jump on the first pass
|
|
|
|
// calculate rel assuming 8 bit relative jump
|
|
|
|
rel -= 2;
|
|
|
|
if (SIGNED_FIT8(rel)) {
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_JMP_REL8, rel & 0xff);
|
2013-10-04 18:53:11 +00:00
|
|
|
} else {
|
2013-10-05 12:44:41 +00:00
|
|
|
rel += 2;
|
|
|
|
goto large_jump;
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
2013-10-05 12:44:41 +00:00
|
|
|
} else {
|
|
|
|
// is a forwards jump, so need to assume it's large
|
|
|
|
large_jump:
|
|
|
|
rel -= 5;
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_JMP_REL32);
|
|
|
|
asm_x64_write_word32(as, rel);
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-10-05 12:44:41 +00:00
|
|
|
void asm_x64_jcc_label(asm_x64_t *as, int jcc_type, int label) {
|
|
|
|
int dest = get_label_dest(as, label);
|
|
|
|
int rel = dest - as->code_offset;
|
|
|
|
if (dest >= 0 && rel < 0) {
|
|
|
|
// is a backwards jump, so we know the size of the jump on the first pass
|
|
|
|
// calculate rel assuming 8 bit relative jump
|
|
|
|
rel -= 2;
|
|
|
|
if (SIGNED_FIT8(rel)) {
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_JCC_REL8 | jcc_type, rel & 0xff);
|
2013-10-04 18:53:11 +00:00
|
|
|
} else {
|
2013-10-05 12:44:41 +00:00
|
|
|
rel += 2;
|
|
|
|
goto large_jump;
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
2013-10-05 12:44:41 +00:00
|
|
|
} else {
|
|
|
|
// is a forwards jump, so need to assume it's large
|
|
|
|
large_jump:
|
|
|
|
rel -= 6;
|
|
|
|
asm_x64_write_byte_2(as, OPCODE_JCC_REL32_A, OPCODE_JCC_REL32_B | jcc_type);
|
|
|
|
asm_x64_write_word32(as, rel);
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_entry(asm_x64_t *as, int num_locals) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_push_r64(as, REG_RBP);
|
|
|
|
asm_x64_mov_r64_to_r64(as, REG_RSP, REG_RBP);
|
|
|
|
if (num_locals < 0) {
|
|
|
|
num_locals = 0;
|
|
|
|
}
|
|
|
|
num_locals |= 1; // make it odd so stack is aligned on 16 byte boundary
|
|
|
|
asm_x64_sub_i32_from_r64(as, num_locals * WORD_SIZE, REG_RSP);
|
|
|
|
asm_x64_push_r64(as, REG_RBX);
|
2014-02-02 13:11:48 +00:00
|
|
|
as->num_locals = num_locals;
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_exit(asm_x64_t *as) {
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_pop_r64(as, REG_RBX);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_LEAVE);
|
|
|
|
asm_x64_ret(as);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_push_arg(asm_x64_t *as, int src_arg_num) {
|
2013-10-04 18:53:11 +00:00
|
|
|
assert(0);
|
|
|
|
asm_x64_push_disp(as, REG_RBP, 8 + src_arg_num * WORD_SIZE);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_arg_to_r32(asm_x64_t *as, int src_arg_num, int dest_r32) {
|
2013-10-04 18:53:11 +00:00
|
|
|
assert(0);
|
|
|
|
//asm_x64_mov_disp_to_r32(as, REG_RBP, 8 + src_arg_num * WORD_SIZE, dest_r32);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_r32_to_arg(asm_x64_t *as, int src_r32, int dest_arg_num) {
|
2013-10-04 18:53:11 +00:00
|
|
|
assert(0);
|
|
|
|
//asm_x64_mov_r32_to_disp(as, src_r32, REG_RBP, 8 + dest_arg_num * WORD_SIZE);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
// locals:
|
|
|
|
// - stored on the stack in ascending order
|
|
|
|
// - numbered 0 through as->num_locals-1
|
|
|
|
// - RBP points above the last local
|
|
|
|
//
|
|
|
|
// | RPB
|
|
|
|
// v
|
|
|
|
// l0 l1 l2 ... l(n-1)
|
|
|
|
// ^ ^
|
|
|
|
// | low address | high address in RAM
|
|
|
|
//
|
2014-02-12 16:31:30 +00:00
|
|
|
STATIC int asm_x64_local_offset_from_ebp(asm_x64_t *as, int local_num) {
|
2014-02-02 13:11:48 +00:00
|
|
|
return (-as->num_locals + local_num) * WORD_SIZE;
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_local_to_r64(asm_x64_t *as, int src_local_num, int dest_r64) {
|
|
|
|
asm_x64_mov_disp_to_r64(as, REG_RBP, asm_x64_local_offset_from_ebp(as, src_local_num), dest_r64);
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_r64_to_local(asm_x64_t *as, int src_r64, int dest_local_num) {
|
|
|
|
asm_x64_mov_r64_to_disp(as, src_r64, REG_RBP, asm_x64_local_offset_from_ebp(as, dest_local_num));
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_mov_local_addr_to_r64(asm_x64_t *as, int local_num, int dest_r64) {
|
|
|
|
int offset = asm_x64_local_offset_from_ebp(as, local_num);
|
2013-10-04 18:53:11 +00:00
|
|
|
if (offset == 0) {
|
|
|
|
asm_x64_mov_r64_to_r64(as, REG_RBP, dest_r64);
|
|
|
|
} else {
|
|
|
|
asm_x64_lea_disp_to_r64(as, REG_RBP, offset, dest_r64);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_push_local(asm_x64_t *as, int local_num) {
|
|
|
|
asm_x64_push_disp(as, REG_RBP, asm_x64_local_offset_from_ebp(as, local_num));
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_push_local_addr(asm_x64_t *as, int local_num, int temp_r64)
|
2013-10-04 18:53:11 +00:00
|
|
|
{
|
|
|
|
asm_x64_mov_r64_to_r64(as, REG_RBP, temp_r64);
|
2014-02-02 13:11:48 +00:00
|
|
|
asm_x64_add_i32_to_r32(as, asm_x64_local_offset_from_ebp(as, local_num), temp_r64);
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_push_r64(as, temp_r64);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
can't use these because code might be relocated when resized
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_call(asm_x64_t *as, void* func)
|
2013-10-04 18:53:11 +00:00
|
|
|
{
|
|
|
|
asm_x64_sub_i32_from_r32(as, 8, REG_RSP);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_CALL_REL32);
|
|
|
|
asm_x64_write_word32(as, func - (void*)(as->code_cur + 4));
|
|
|
|
asm_x64_mov_r64_to_r64(as, REG_RBP, REG_RSP);
|
|
|
|
}
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_call_i1(asm_x64_t *as, void* func, int i1)
|
2013-10-04 18:53:11 +00:00
|
|
|
{
|
|
|
|
asm_x64_sub_i32_from_r32(as, 8, REG_RSP);
|
|
|
|
asm_x64_sub_i32_from_r32(as, 12, REG_RSP);
|
|
|
|
asm_x64_push_i32(as, i1);
|
|
|
|
asm_x64_write_byte_1(as, OPCODE_CALL_REL32);
|
|
|
|
asm_x64_write_word32(as, func - (void*)(as->code_cur + 4));
|
|
|
|
asm_x64_add_i32_to_r32(as, 16, REG_RSP);
|
|
|
|
asm_x64_mov_r64_to_r64(as, REG_RBP, REG_RSP);
|
|
|
|
}
|
|
|
|
*/
|
|
|
|
|
2014-02-02 13:11:48 +00:00
|
|
|
void asm_x64_call_ind(asm_x64_t *as, void *ptr, int temp_r64) {
|
2013-12-30 12:52:32 +00:00
|
|
|
#ifdef __LP64__
|
|
|
|
asm_x64_mov_i64_to_r64_optimised(as, (int64_t)ptr, temp_r64);
|
|
|
|
#else
|
|
|
|
// If we get here, sizeof(int) == sizeof(void*).
|
|
|
|
asm_x64_mov_i64_to_r64_optimised(as, (int64_t)(unsigned int)ptr, temp_r64);
|
|
|
|
#endif
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_2(as, OPCODE_CALL_RM32, MODRM_R64(2) | MODRM_RM_REG | MODRM_RM_R64(temp_r64));
|
|
|
|
// this reduces code size by 2 bytes per call, but doesn't seem to speed it up at all
|
2013-10-05 11:19:06 +00:00
|
|
|
// doesn't work anymore because calls are 64 bits away
|
|
|
|
/*
|
2013-10-04 18:53:11 +00:00
|
|
|
asm_x64_write_byte_1(as, OPCODE_CALL_REL32);
|
|
|
|
asm_x64_write_word32(as, ptr - (void*)(as->code_base + as->code_offset + 4));
|
2013-10-05 11:19:06 +00:00
|
|
|
*/
|
2013-10-04 18:53:11 +00:00
|
|
|
}
|
2014-01-04 13:55:24 +00:00
|
|
|
|
|
|
|
#endif // MICROPY_EMIT_X64
|