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py: Implement more binary ops for viper emitter. 

This included a bit of restructuring of the assembler backends.  Note
that the ARM backend is missing a few functions and won't compile.
pull/887/head
Damien George 2014-09-29 18:45:42 +01:00
rodzic 6f81348fa2
commit 3112cde900
7 zmienionych plików z 260 dodań i 117 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

12
py/asmarm.c
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@ -170,6 +170,11 @@ STATIC uint asm_arm_op_sub_imm(uint rd, uint rn, uint imm) {
return 0x2400000 | (rn << 16) | (rd << 12) | (imm & 0xFF);
}
STATIC uint asm_arm_op_sub_reg(uint rd, uint rn, uint rm) {
// sub rd, rn, rm
return 0x0400000 | (rn << 16) | (rd << 12) | rm;
}
void asm_arm_bkpt(asm_arm_t *as) {
// bkpt #0
emit_al(as, 0x1200070);
@ -298,11 +303,16 @@ void asm_arm_less_op(asm_arm_t *as, uint rd, uint rn, uint rm) {
emit(as, asm_arm_op_mov_imm(rd, 0) | ASM_ARM_CC_GE); // movge rd, #0
}
void asm_arm_add_reg(asm_arm_t *as, uint rd, uint rn, uint rm) {
void asm_arm_add_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm) {
// add rd, rn, rm
emit_al(as, asm_arm_op_add_reg(rd, rn, rm));
}
void asm_arm_sub_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm) {
// sub rd, rn, rm
emit_al(as, asm_arm_op_sub_reg(rd, rn, rm));
}
void asm_arm_mov_reg_local_addr(asm_arm_t *as, uint rd, int local_num) {
// add rd, sp, #local_num*4
emit_al(as, asm_arm_op_add_imm(rd, ASM_ARM_REG_SP, local_num << 2));

3
py/asmarm.h
Wyświetl plik

@ -89,7 +89,8 @@ void asm_arm_mov_reg_local(asm_arm_t *as, uint rd, int local_num);
void asm_arm_cmp_reg_i8(asm_arm_t *as, uint rd, int imm);
void asm_arm_cmp_reg_reg(asm_arm_t *as, uint rd, uint rn);
void asm_arm_less_op(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_add_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_add_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_sub_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_mov_reg_local_addr(asm_arm_t *as, uint rd, int local_num);
void asm_arm_bcc_label(asm_arm_t *as, int cond, uint label);

75
py/asmx64.c
Wyświetl plik

@ -54,19 +54,21 @@
#define OPCODE_MOV_RM64_TO_R64 (0x8b)
#define OPCODE_LEA_MEM_TO_R64 (0x8d) /* /r */
#define OPCODE_XOR_R64_TO_RM64 (0x31) /* /r */
#define OPCODE_ADD_R64_TO_RM64 (0x01)
#define OPCODE_ADD_R64_TO_RM64 (0x01) /* /r */
#define OPCODE_ADD_I32_TO_RM32 (0x81) /* /0 */
#define OPCODE_ADD_I8_TO_RM32 (0x83) /* /0 */
#define OPCODE_SUB_R64_FROM_RM64 (0x29)
#define OPCODE_SUB_I32_FROM_RM64 (0x81) /* /5 */
#define OPCODE_SUB_I8_FROM_RM64 (0x83) /* /5 */
#define OPCODE_SHL_RM32_BY_I8 (0xc1) /* /4 */
#define OPCODE_SHR_RM32_BY_I8 (0xc1) /* /5 */
#define OPCODE_SAR_RM32_BY_I8 (0xc1) /* /7 */
#define OPCODE_CMP_I32_WITH_RM32 (0x81) /* /7 */
#define OPCODE_CMP_I8_WITH_RM32 (0x83) /* /7 */
#define OPCODE_CMP_R64_WITH_RM64 (0x39)
#define OPCODE_CMP_RM32_WITH_R32 (0x3b)
//#define OPCODE_SHL_RM32_BY_I8 (0xc1) /* /4 */
//#define OPCODE_SHR_RM32_BY_I8 (0xc1) /* /5 */
//#define OPCODE_SAR_RM32_BY_I8 (0xc1) /* /7 */
#define OPCODE_SHL_RM64_CL (0xd3) /* /4 */
#define OPCODE_SAR_RM64_CL (0xd3) /* /7 */
//#define OPCODE_CMP_I32_WITH_RM32 (0x81) /* /7 */
//#define OPCODE_CMP_I8_WITH_RM32 (0x83) /* /7 */
#define OPCODE_CMP_R64_WITH_RM64 (0x39) /* /r */
//#define OPCODE_CMP_RM32_WITH_R32 (0x3b)
#define OPCODE_TEST_R8_WITH_RM8 (0x84) /* /r */
#define OPCODE_JMP_REL8 (0xeb)
#define OPCODE_JMP_REL32 (0xe9)
@ -253,6 +255,10 @@ STATIC void asm_x64_write_r64_disp(asm_x64_t *as, int r64, int disp_r64, int dis
}
}
STATIC void asm_x64_generic_r64_r64(asm_x64_t *as, int dest_r64, int src_r64, int op) {
asm_x64_write_byte_3(as, REX_PREFIX | REX_W | (src_r64 < 8 ? 0 : REX_R) | (dest_r64 < 8 ? 0 : REX_B), op, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
}
void asm_x64_nop(asm_x64_t *as) {
asm_x64_write_byte_1(as, OPCODE_NOP);
}
@ -290,9 +296,8 @@ STATIC void asm_x64_ret(asm_x64_t *as) {
asm_x64_write_byte_1(as, OPCODE_RET);
}
void asm_x64_mov_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
// use REX prefix for 64 bit operation
asm_x64_write_byte_3(as, REX_PREFIX | REX_W | (src_r64 < 8 ? 0 : REX_R) | (dest_r64 < 8 ? 0 : REX_B), OPCODE_MOV_R64_TO_RM64, MODRM_R64(src_r64) | MODRM_RM_REG | MODRM_RM_R64(dest_r64));
void asm_x64_mov_r64_r64(asm_x64_t *as, int dest_r64, int src_r64) {
asm_x64_generic_r64_r64(as, dest_r64, src_r64, OPCODE_MOV_R64_TO_RM64);
}
void asm_x64_mov_r8_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp) {
@ -377,30 +382,24 @@ void asm_x64_mov_i64_to_r64_aligned(asm_x64_t *as, int64_t src_i64, int dest_r64
asm_x64_mov_i64_to_r64(as, src_i64, dest_r64);
}
void asm_x64_xor_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
assert(src_r64 < 8);
assert(dest_r64 < 8);
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));
void asm_x64_xor_r64_r64(asm_x64_t *as, int dest_r64, int src_r64) {
asm_x64_generic_r64_r64(as, dest_r64, src_r64, OPCODE_XOR_R64_TO_RM64);
}
void asm_x64_add_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64) {
assert(src_r64 < 8);
assert(dest_r64 < 8);
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));
void asm_x64_shl_r64_cl(asm_x64_t* as, int dest_r64) {
asm_x64_generic_r64_r64(as, dest_r64, 4, OPCODE_SHL_RM64_CL);
}
/*
void asm_x64_sub_r32_from_r32(asm_x64_t *as, int src_r32, int dest_r32) {
// 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));
void asm_x64_sar_r64_cl(asm_x64_t* as, int dest_r64) {
asm_x64_generic_r64_r64(as, dest_r64, 7, OPCODE_SAR_RM64_CL);
}
*/
void asm_x64_sub_r64_from_r64(asm_x64_t *as, int src_r64, int dest_r64) {
// use REX prefix for 64 bit operation
assert(src_r64 < 8);
assert(dest_r64 < 8);
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));
void asm_x64_add_r64_r64(asm_x64_t *as, int dest_r64, int src_r64) {
asm_x64_generic_r64_r64(as, dest_r64, src_r64, OPCODE_ADD_R64_TO_RM64);
}
void asm_x64_sub_r64_r64(asm_x64_t *as, int dest_r64, int src_r64) {
asm_x64_generic_r64_r64(as, dest_r64, src_r64, OPCODE_SUB_R64_FROM_RM64);
}
/*
@ -417,7 +416,7 @@ void asm_x64_sub_i32_from_r32(asm_x64_t *as, int src_i32, int dest_r32) {
}
*/
void asm_x64_sub_i32_from_r64(asm_x64_t *as, int src_i32, int dest_r64) {
STATIC void asm_x64_sub_r64_i32(asm_x64_t *as, int dest_r64, int src_i32) {
assert(dest_r64 < 8);
if (SIGNED_FIT8(src_i32)) {
// use REX prefix for 64 bit operation
@ -448,9 +447,7 @@ void asm_x64_sar_r32_by_imm(asm_x64_t *as, int r32, int imm) {
*/
void asm_x64_cmp_r64_with_r64(asm_x64_t *as, int src_r64_a, int src_r64_b) {
assert(src_r64_a < 8);
assert(src_r64_b < 8);
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));
asm_x64_generic_r64_r64(as, src_r64_b, src_r64_a, OPCODE_CMP_R64_WITH_RM64);
}
/*
@ -541,12 +538,12 @@ void asm_x64_jcc_label(asm_x64_t *as, int jcc_type, int label) {
void asm_x64_entry(asm_x64_t *as, int num_locals) {
asm_x64_push_r64(as, ASM_X64_REG_RBP);
asm_x64_mov_r64_to_r64(as, ASM_X64_REG_RSP, ASM_X64_REG_RBP);
asm_x64_mov_r64_r64(as, ASM_X64_REG_RBP, ASM_X64_REG_RSP);
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, ASM_X64_REG_RSP);
asm_x64_sub_r64_i32(as, ASM_X64_REG_RSP, num_locals * WORD_SIZE);
asm_x64_push_r64(as, ASM_X64_REG_RBX);
asm_x64_push_r64(as, ASM_X64_REG_R12);
asm_x64_push_r64(as, ASM_X64_REG_R13);
@ -587,7 +584,7 @@ void asm_x64_mov_r64_to_local(asm_x64_t *as, int src_r64, int dest_local_num) {
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);
if (offset == 0) {
asm_x64_mov_r64_to_r64(as, ASM_X64_REG_RBP, dest_r64);
asm_x64_mov_r64_r64(as, dest_r64, ASM_X64_REG_RBP);
} else {
asm_x64_lea_disp_to_r64(as, ASM_X64_REG_RBP, offset, dest_r64);
}
@ -600,7 +597,7 @@ void asm_x64_push_local(asm_x64_t *as, int local_num) {
void asm_x64_push_local_addr(asm_x64_t *as, int local_num, int temp_r64)
{
asm_x64_mov_r64_to_r64(as, ASM_X64_REG_RBP, temp_r64);
asm_x64_mov_r64_r64(as, temp_r64, ASM_X64_REG_RBP);
asm_x64_add_i32_to_r32(as, asm_x64_local_offset_from_ebp(as, local_num), temp_r64);
asm_x64_push_r64(as, temp_r64);
}
@ -614,7 +611,7 @@ void asm_x64_call(asm_x64_t *as, void* func)
asm_x64_sub_i32_from_r32(as, 8, ASM_X64_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, ASM_X64_REG_RBP, ASM_X64_REG_RSP);
asm_x64_mov_r64_r64(as, ASM_X64_REG_RSP, ASM_X64_REG_RBP);
}
void asm_x64_call_i1(asm_x64_t *as, void* func, int i1)
@ -625,7 +622,7 @@ void asm_x64_call_i1(asm_x64_t *as, void* func, int 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, ASM_X64_REG_RSP);
asm_x64_mov_r64_to_r64(as, ASM_X64_REG_RBP, ASM_X64_REG_RSP);
asm_x64_mov_r64_r64(as, ASM_X64_REG_RSP, ASM_X64_REG_RBP);
}
*/

16
py/asmx64.h
Wyświetl plik

@ -31,6 +31,11 @@
// - RAX, RCX, RDX, RSI, RDI, R08, R09, R10, R11 are caller-save
// - RBX, RBP, R12, R13, R14, R15 are callee-save
// In the functions below, argument order follows x86 docs and generally
// the destination is the first argument.
// NOTE: this is a change from the old convention used in this file and
// some functions still use the old (reverse) convention.
#define ASM_X64_PASS_COMPUTE (1)
#define ASM_X64_PASS_EMIT (2)
@ -58,6 +63,8 @@
#define ASM_X64_CC_JNZ (0x5)
#define ASM_X64_CC_JNE (0x5)
#define ASM_X64_CC_JL (0xc) // less, signed
#define ASM_X64_CC_JGE (0xd) // greater or equal, signed
#define ASM_X64_CC_JLE (0xe) // less or equal, signed
#define ASM_X64_CC_JG (0xf) // greater, signed
typedef struct _asm_x64_t asm_x64_t;
@ -72,15 +79,18 @@ void* asm_x64_get_code(asm_x64_t* as);
void asm_x64_nop(asm_x64_t* as);
void asm_x64_push_r64(asm_x64_t* as, int src_r64);
void asm_x64_pop_r64(asm_x64_t* as, int dest_r64);
void asm_x64_mov_r64_to_r64(asm_x64_t* as, int src_r64, int dest_r64);
void asm_x64_mov_r64_r64(asm_x64_t* as, int dest_r64, int src_r64);
void asm_x64_mov_i64_to_r64(asm_x64_t* as, int64_t src_i64, int dest_r64);
void asm_x64_mov_i64_to_r64_optimised(asm_x64_t *as, int64_t src_i64, int dest_r64);
void asm_x64_mov_i64_to_r64_aligned(asm_x64_t *as, int64_t src_i64, int dest_r64);
void asm_x64_mov_r8_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp);
void asm_x64_mov_r16_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp);
void asm_x64_mov_r64_to_disp(asm_x64_t *as, int src_r64, int dest_r64, int dest_disp);
void asm_x64_xor_r64_to_r64(asm_x64_t *as, int src_r64, int dest_r64);
void asm_x64_add_r64_to_r64(asm_x64_t* as, int src_r64, int dest_r64);
void asm_x64_xor_r64_r64(asm_x64_t *as, int dest_r64, int src_r64);
void asm_x64_shl_r64_cl(asm_x64_t* as, int dest_r64);
void asm_x64_sar_r64_cl(asm_x64_t* as, int dest_r64);
void asm_x64_add_r64_r64(asm_x64_t* as, int dest_r64, int src_r64);
void asm_x64_sub_r64_r64(asm_x64_t* as, int dest_r64, int src_r64);
void asm_x64_cmp_r64_with_r64(asm_x64_t* as, int src_r64_a, int src_r64_b);
void asm_x64_test_r8_with_r8(asm_x64_t* as, int src_r64_a, int src_r64_b);
void asm_x64_setcc_r8(asm_x64_t* as, int jcc_type, int dest_r8);

44
py/asmx86.c
Wyświetl plik

@ -57,12 +57,14 @@
#define OPCODE_ADD_R32_TO_RM32 (0x01)
#define OPCODE_ADD_I32_TO_RM32 (0x81) /* /0 */
#define OPCODE_ADD_I8_TO_RM32 (0x83) /* /0 */
//#define OPCODE_SUB_R32_FROM_RM32 (0x29)
#define OPCODE_SUB_R32_FROM_RM32 (0x29)
#define OPCODE_SUB_I32_FROM_RM32 (0x81) /* /5 */
#define OPCODE_SUB_I8_FROM_RM32 (0x83) /* /5 */
//#define OPCODE_SHL_RM32_BY_I8 (0xc1) /* /4 */
//#define OPCODE_SHR_RM32_BY_I8 (0xc1) /* /5 */
//#define OPCODE_SAR_RM32_BY_I8 (0xc1) /* /7 */
#define OPCODE_SHL_RM32_CL (0xd3) /* /4 */
#define OPCODE_SAR_RM32_CL (0xd3) /* /7 */
//#define OPCODE_CMP_I32_WITH_RM32 (0x81) /* /7 */
//#define OPCODE_CMP_I8_WITH_RM32 (0x83) /* /7 */
#define OPCODE_CMP_R32_WITH_RM32 (0x39)
@ -204,6 +206,10 @@ STATIC void asm_x86_write_r32_disp(asm_x86_t *as, int r32, int disp_r32, int dis
}
}
STATIC void asm_x86_generic_r32_r32(asm_x86_t *as, int dest_r32, int src_r32, int op) {
asm_x86_write_byte_2(as, op, MODRM_R32(src_r32) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
}
STATIC void asm_x86_nop(asm_x86_t *as) {
asm_x86_write_byte_1(as, OPCODE_NOP);
}
@ -232,8 +238,8 @@ STATIC void asm_x86_ret(asm_x86_t *as) {
asm_x86_write_byte_1(as, OPCODE_RET);
}
void asm_x86_mov_r32_to_r32(asm_x86_t *as, int src_r32, int dest_r32) {
asm_x86_write_byte_2(as, OPCODE_MOV_R32_TO_RM32, MODRM_R32(src_r32) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
void asm_x86_mov_r32_r32(asm_x86_t *as, int dest_r32, int src_r32) {
asm_x86_generic_r32_r32(as, dest_r32, src_r32, OPCODE_MOV_R32_TO_RM32);
}
void asm_x86_mov_r8_to_disp(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp) {
@ -281,12 +287,20 @@ void asm_x86_mov_i32_to_r32_aligned(asm_x86_t *as, int32_t src_i32, int dest_r32
asm_x86_mov_i32_to_r32(as, src_i32, dest_r32);
}
void asm_x86_xor_r32_to_r32(asm_x86_t *as, int src_r32, int dest_r32) {
asm_x86_write_byte_2(as, OPCODE_XOR_R32_TO_RM32, MODRM_R32(src_r32) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
void asm_x86_xor_r32_r32(asm_x86_t *as, int dest_r32, int src_r32) {
asm_x86_generic_r32_r32(as, dest_r32, src_r32, OPCODE_XOR_R32_TO_RM32);
}
void asm_x86_add_r32_to_r32(asm_x86_t *as, int src_r32, int dest_r32) {
asm_x86_write_byte_2(as, OPCODE_ADD_R32_TO_RM32, MODRM_R32(src_r32) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
void asm_x86_shl_r32_cl(asm_x86_t* as, int dest_r32) {
asm_x86_generic_r32_r32(as, dest_r32, 4, OPCODE_SHL_RM32_CL);
}
void asm_x86_sar_r32_cl(asm_x86_t* as, int dest_r32) {
asm_x86_generic_r32_r32(as, dest_r32, 7, OPCODE_SAR_RM32_CL);
}
void asm_x86_add_r32_r32(asm_x86_t *as, int dest_r32, int src_r32) {
asm_x86_generic_r32_r32(as, dest_r32, src_r32, OPCODE_ADD_R32_TO_RM32);
}
void asm_x86_add_i32_to_r32(asm_x86_t *as, int src_i32, int dest_r32) {
@ -299,13 +313,11 @@ void asm_x86_add_i32_to_r32(asm_x86_t *as, int src_i32, int dest_r32) {
}
}
#if 0
void asm_x86_sub_r32_from_r32(asm_x86_t *as, int src_r32, int dest_r32) {
asm_x86_write_byte_2(as, OPCODE_SUB_R32_FROM_RM32, MODRM_R32(src_r32) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
void asm_x86_sub_r32_r32(asm_x86_t *as, int dest_r32, int src_r32) {
asm_x86_generic_r32_r32(as, dest_r32, src_r32, OPCODE_SUB_R32_FROM_RM32);
}
#endif
void asm_x86_sub_i32_from_r32(asm_x86_t *as, int src_i32, int dest_r32) {
STATIC void asm_x86_sub_r32_i32(asm_x86_t *as, int dest_r32, int src_i32) {
if (SIGNED_FIT8(src_i32)) {
// defaults to 32 bit operation
asm_x86_write_byte_2(as, OPCODE_SUB_I8_FROM_RM32, MODRM_R32(5) | MODRM_RM_REG | MODRM_RM_R32(dest_r32));
@ -426,9 +438,9 @@ void asm_x86_jcc_label(asm_x86_t *as, mp_uint_t jcc_type, mp_uint_t label) {
void asm_x86_entry(asm_x86_t *as, mp_uint_t num_locals) {
asm_x86_push_r32(as, ASM_X86_REG_EBP);
asm_x86_mov_r32_to_r32(as, ASM_X86_REG_ESP, ASM_X86_REG_EBP);
asm_x86_mov_r32_r32(as, ASM_X86_REG_EBP, ASM_X86_REG_ESP);
if (num_locals > 0) {
asm_x86_sub_i32_from_r32(as, num_locals * WORD_SIZE, ASM_X86_REG_ESP);
asm_x86_sub_r32_i32(as, ASM_X86_REG_ESP, num_locals * WORD_SIZE);
}
asm_x86_push_r32(as, ASM_X86_REG_EBX);
asm_x86_push_r32(as, ASM_X86_REG_ESI);
@ -487,7 +499,7 @@ void asm_x86_mov_r32_to_local(asm_x86_t *as, int src_r32, int dest_local_num) {
void asm_x86_mov_local_addr_to_r32(asm_x86_t *as, int local_num, int dest_r32) {
int offset = asm_x86_local_offset_from_ebp(as, local_num);
if (offset == 0) {
asm_x86_mov_r32_to_r32(as, ASM_X86_REG_EBP, dest_r32);
asm_x86_mov_r32_r32(as, dest_r32, ASM_X86_REG_EBP);
} else {
asm_x86_lea_disp_to_r32(as, ASM_X86_REG_EBP, offset, dest_r32);
}
@ -500,7 +512,7 @@ void asm_x86_push_local(asm_x86_t *as, int local_num) {
void asm_x86_push_local_addr(asm_x86_t *as, int local_num, int temp_r32)
{
asm_x86_mov_r32_to_r32(as, ASM_X86_REG_EBP, temp_r32);
asm_x86_mov_r32_r32(as, temp_r32, ASM_X86_REG_EBP);
asm_x86_add_i32_to_r32(as, asm_x86_local_offset_from_ebp(as, local_num), temp_r32);
asm_x86_push_r32(as, temp_r32);
}

16
py/asmx86.h
Wyświetl plik

@ -32,6 +32,11 @@
// - EAX, ECX, EDX are caller-save
// - EBX, ESI, EDI, EBP, ESP, EIP are callee-save
// In the functions below, argument order follows x86 docs and generally
// the destination is the first argument.
// NOTE: this is a change from the old convention used in this file and
// some functions still use the old (reverse) convention.
#define ASM_X86_PASS_COMPUTE (1)
#define ASM_X86_PASS_EMIT (2)
@ -59,6 +64,8 @@
#define ASM_X86_CC_JNZ (0x5)
#define ASM_X86_CC_JNE (0x5)
#define ASM_X86_CC_JL (0xc) // less, signed
#define ASM_X86_CC_JGE (0xd) // greater or equal, signed
#define ASM_X86_CC_JLE (0xe) // less or equal, signed
#define ASM_X86_CC_JG (0xf) // greater, signed
typedef struct _asm_x86_t asm_x86_t;
@ -70,14 +77,17 @@ void asm_x86_end_pass(asm_x86_t *as);
mp_uint_t asm_x86_get_code_size(asm_x86_t* as);
void* asm_x86_get_code(asm_x86_t* as);
void asm_x86_mov_r32_to_r32(asm_x86_t* as, int src_r32, int dest_r32);
void asm_x86_mov_r32_r32(asm_x86_t* as, int dest_r32, int src_r32);
void asm_x86_mov_i32_to_r32(asm_x86_t *as, int32_t src_i32, int dest_r32);
void asm_x86_mov_i32_to_r32_aligned(asm_x86_t *as, int32_t src_i32, int dest_r32);
void asm_x86_mov_r8_to_disp(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
void asm_x86_mov_r16_to_disp(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
void asm_x86_mov_r32_to_disp(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);
void asm_x86_xor_r32_to_r32(asm_x86_t *as, int src_r32, int dest_r32);
void asm_x86_add_r32_to_r32(asm_x86_t* as, int src_r32, int dest_r32);
void asm_x86_xor_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);
void asm_x86_shl_r32_cl(asm_x86_t* as, int dest_r32);
void asm_x86_sar_r32_cl(asm_x86_t* as, int dest_r32);
void asm_x86_add_r32_r32(asm_x86_t* as, int dest_r32, int src_r32);
void asm_x86_sub_r32_r32(asm_x86_t* as, int dest_r32, int src_r32);
void asm_x86_cmp_r32_with_r32(asm_x86_t* as, int src_r32_a, int src_r32_b);
void asm_x86_test_r8_with_r8(asm_x86_t* as, int src_r32_a, int src_r32_b);
void asm_x86_setcc_r8(asm_x86_t* as, mp_uint_t jcc_type, int dest_r8);

211
py/emitnative.c
Wyświetl plik

@ -140,9 +140,14 @@
asm_x64_mov_r64_to_local(as, (reg_temp), (local_num)); \
} while (false)
#define ASM_MOV_LOCAL_TO_REG asm_x64_mov_local_to_r64
#define ASM_MOV_REG_TO_REG asm_x64_mov_r64_to_r64
#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x64_mov_r64_r64((as), (reg_dest), (reg_src))
#define ASM_MOV_LOCAL_ADDR_TO_REG asm_x64_mov_local_addr_to_r64
#define ASM_LSL_REG(as, reg) asm_x64_shl_r64_cl((as), (reg))
#define ASM_ASR_REG(as, reg) asm_x64_sar_r64_cl((as), (reg))
#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_x64_add_r64_r64((as), (reg_dest), (reg_src))
#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_x64_sub_r64_r64((as), (reg_dest), (reg_src))
#elif N_X86
// x86 specific stuff
@ -256,9 +261,14 @@ STATIC byte mp_f_n_args[MP_F_NUMBER_OF] = {
asm_x86_mov_r32_to_local(as, (reg_temp), (local_num)); \
} while (false)
#define ASM_MOV_LOCAL_TO_REG asm_x86_mov_local_to_r32
#define ASM_MOV_REG_TO_REG asm_x86_mov_r32_to_r32
#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x86_mov_r32_r32((as), (reg_dest), (reg_src))
#define ASM_MOV_LOCAL_ADDR_TO_REG asm_x86_mov_local_addr_to_r32
#define ASM_LSL_REG(as, reg) asm_x86_shl_r32_cl((as), (reg))
#define ASM_ASR_REG(as, reg) asm_x86_sar_r32_cl((as), (reg))
#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_x86_add_r32_r32((as), (reg_dest), (reg_src))
#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_x86_sub_r32_r32((as), (reg_dest), (reg_src))
#elif N_THUMB
// thumb specific stuff
@ -323,9 +333,14 @@ STATIC byte mp_f_n_args[MP_F_NUMBER_OF] = {
asm_thumb_mov_local_reg(as, (local_num), (reg_temp)); \
} while (false)
#define ASM_MOV_LOCAL_TO_REG(as, local_num, reg) asm_thumb_mov_reg_local(as, (reg), (local_num))
#define ASM_MOV_REG_TO_REG(as, reg_src, reg_dest) asm_thumb_mov_reg_reg(as, (reg_dest), (reg_src))
#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_thumb_mov_reg_reg((as), (reg_dest), (reg_src))
#define ASM_MOV_LOCAL_ADDR_TO_REG(as, local_num, reg) asm_thumb_mov_reg_local_addr(as, (reg), (local_num))
#define ASM_LSL_REG_REG(as, reg_dest, reg_shift) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_LSL, (reg_dest), (reg_shift))
#define ASM_ASR_REG_REG(as, reg_dest, reg_shift) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_ASR, (reg_dest), (reg_shift))
#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_thumb_add_rlo_rlo_rlo((as), (reg_dest), (reg_dest), (reg_src))
#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_thumb_sub_rlo_rlo_rlo((as), (reg_dest), (reg_dest), (reg_src))
#elif N_ARM
// ARM specific stuff
@ -390,9 +405,15 @@ STATIC byte mp_f_n_args[MP_F_NUMBER_OF] = {
asm_arm_mov_local_reg(as, (local_num), (reg_temp)); \
} while (false)
#define ASM_MOV_LOCAL_TO_REG(as, local_num, reg) asm_arm_mov_reg_local(as, (reg), (local_num))
#define ASM_MOV_REG_TO_REG(as, reg_src, reg_dest) asm_arm_mov_reg_reg(as, (reg_dest), (reg_src))
#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_arm_mov_reg_reg((as), (reg_dest), (reg_src))
#define ASM_MOV_LOCAL_ADDR_TO_REG(as, local_num, reg) asm_arm_mov_reg_local_addr(as, (reg), (local_num))
// TODO someone please implement lsl and asr
#define ASM_LSL_REG_REG(as, reg_dest, reg_shift) asm_arm_lsl_((as), (reg_dest), (reg_shift))
#define ASM_ASR_REG_REG(as, reg_dest, reg_shift) asm_arm_asr_((as), (reg_dest), (reg_shift))
#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_arm_add_reg_reg_reg((as), (reg_dest), (reg_dest), (reg_src))
#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_arm_sub_reg_reg_reg((as), (reg_dest), (reg_dest), (reg_src))
#else
#error unknown native emitter
@ -544,11 +565,11 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
#if N_X64
for (int i = 0; i < scope->num_pos_args; i++) {
if (i == 0) {
asm_x64_mov_r64_to_r64(emit->as, REG_ARG_1, REG_LOCAL_1);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_1, REG_ARG_1);
} else if (i == 1) {
asm_x64_mov_r64_to_r64(emit->as, REG_ARG_2, REG_LOCAL_2);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_2, REG_ARG_2);
} else if (i == 2) {
asm_x64_mov_r64_to_r64(emit->as, REG_ARG_3, REG_LOCAL_3);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_3, REG_ARG_3);
} else if (i == 3) {
asm_x64_mov_r64_to_local(emit->as, REG_ARG_4, i - REG_LOCAL_NUM);
} else {
@ -572,11 +593,11 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
#elif N_THUMB
for (int i = 0; i < scope->num_pos_args; i++) {
if (i == 0) {
asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_1, REG_ARG_1);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_1, REG_ARG_1);
} else if (i == 1) {
asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_2, REG_ARG_2);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_2, REG_ARG_2);
} else if (i == 2) {
asm_thumb_mov_reg_reg(emit->as, REG_LOCAL_3, REG_ARG_3);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_3, REG_ARG_3);
} else if (i == 3) {
asm_thumb_mov_local_reg(emit->as, i - REG_LOCAL_NUM, REG_ARG_4);
} else {
@ -589,11 +610,11 @@ STATIC void emit_native_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scop
#elif N_ARM
for (int i = 0; i < scope->num_pos_args; i++) {
if (i == 0) {
asm_arm_mov_reg_reg(emit->as, REG_LOCAL_1, REG_ARG_1);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_1, REG_ARG_1);
} else if (i == 1) {
asm_arm_mov_reg_reg(emit->as, REG_LOCAL_2, REG_ARG_2);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_2, REG_ARG_2);
} else if (i == 2) {
asm_arm_mov_reg_reg(emit->as, REG_LOCAL_3, REG_ARG_3);
ASM_MOV_REG_REG(emit->as, REG_LOCAL_3, REG_ARG_3);
} else if (i == 3) {
asm_arm_mov_local_reg(emit->as, i - REG_LOCAL_NUM, REG_ARG_4);
} else {
@ -698,8 +719,14 @@ STATIC void emit_native_pre(emit_t *emit) {
*/
}
STATIC vtype_kind_t peek_vtype(emit_t *emit) {
return emit->stack_info[emit->stack_size - 1].vtype;
// depth==0 is top, depth==1 is before top, etc
STATIC stack_info_t *peek_stack(emit_t *emit, mp_uint_t depth) {
return &emit->stack_info[emit->stack_size - 1 - depth];
}
// depth==0 is top, depth==1 is before top, etc
STATIC vtype_kind_t peek_vtype(emit_t *emit, mp_uint_t depth) {
return peek_stack(emit, depth)->vtype;
}
// pos=1 is TOS, pos=2 is next, etc
@ -759,7 +786,7 @@ STATIC void emit_access_stack(emit_t *emit, int pos, vtype_kind_t *vtype, int re
case STACK_REG:
if (si->u_reg != reg_dest) {
ASM_MOV_REG_TO_REG(emit->as, si->u_reg, reg_dest);
ASM_MOV_REG_REG(emit->as, reg_dest, si->u_reg);
}
break;
@ -769,6 +796,21 @@ STATIC void emit_access_stack(emit_t *emit, int pos, vtype_kind_t *vtype, int re
}
}
// If stacked value is in a register, then *reg_dest is set to that register.
// Otherwise, the value is put in *reg_dest.
STATIC void emit_pre_pop_reg_flexible(emit_t *emit, vtype_kind_t *vtype, int *reg_dest) {
emit->last_emit_was_return_value = false;
stack_info_t *si = peek_stack(emit, 0);
if (si->kind == STACK_REG) {
*vtype = si->vtype;
*reg_dest = si->u_reg;
need_reg_single(emit, *reg_dest, 1);
} else {
emit_access_stack(emit, 1, vtype, *reg_dest);
}
adjust_stack(emit, -1);
}
STATIC void emit_pre_pop_discard(emit_t *emit) {
emit->last_emit_was_return_value = false;
adjust_stack(emit, -1);
@ -1250,13 +1292,13 @@ STATIC void emit_native_store_name(emit_t *emit, qstr qst) {
}
STATIC void emit_native_store_global(emit_t *emit, qstr qst) {
vtype_kind_t vtype = peek_vtype(emit);
vtype_kind_t vtype = peek_vtype(emit, 0);
if (vtype == VTYPE_PYOBJ) {
emit_pre_pop_reg(emit, &vtype, REG_ARG_2);
} else {
emit_pre_pop_reg(emit, &vtype, REG_ARG_1);
emit_call_with_imm_arg(emit, MP_F_CONVERT_NATIVE_TO_OBJ, vtype, REG_ARG_2); // arg2 = type
ASM_MOV_REG_TO_REG(emit->as, REG_RET, REG_ARG_2);
ASM_MOV_REG_REG(emit->as, REG_ARG_2, REG_RET);
}
emit_call_with_imm_arg(emit, MP_F_STORE_GLOBAL, qst, REG_ARG_1); // arg1 = name
emit_post(emit);
@ -1364,7 +1406,7 @@ STATIC void emit_native_jump(emit_t *emit, mp_uint_t label) {
}
STATIC void emit_native_jump_helper(emit_t *emit, mp_uint_t label, bool pop) {
vtype_kind_t vtype = peek_vtype(emit);
vtype_kind_t vtype = peek_vtype(emit, 0);
switch (vtype) {
case VTYPE_PYOBJ:
emit_pre_pop_reg(emit, &vtype, REG_ARG_1);
@ -1507,7 +1549,7 @@ STATIC void emit_native_unary_op(emit_t *emit, mp_unary_op_t op) {
if (op == MP_UNARY_OP_NOT) {
// we need to synthesise this operation by converting to bool first
emit_call_with_imm_arg(emit, MP_F_UNARY_OP, MP_UNARY_OP_BOOL, REG_ARG_1);
ASM_MOV_REG_TO_REG(emit->as, REG_RET, REG_ARG_2);
ASM_MOV_REG_REG(emit->as, REG_ARG_2, REG_RET);
}
emit_call_with_imm_arg(emit, MP_F_UNARY_OP, op, REG_ARG_1);
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);
@ -1515,47 +1557,108 @@ STATIC void emit_native_unary_op(emit_t *emit, mp_unary_op_t op) {
STATIC void emit_native_binary_op(emit_t *emit, mp_binary_op_t op) {
DEBUG_printf("binary_op(" UINT_FMT ")\n", op);
vtype_kind_t vtype_lhs, vtype_rhs;
emit_pre_pop_reg_reg(emit, &vtype_rhs, REG_ARG_3, &vtype_lhs, REG_ARG_2);
vtype_kind_t vtype_lhs = peek_vtype(emit, 1);
vtype_kind_t vtype_rhs = peek_vtype(emit, 0);
if (vtype_lhs == VTYPE_INT && vtype_rhs == VTYPE_INT) {
if (op == MP_BINARY_OP_ADD || op == MP_BINARY_OP_INPLACE_ADD) {
#if N_X64
asm_x64_add_r64_to_r64(emit->as, REG_ARG_3, REG_ARG_2);
#elif N_X86
asm_x86_add_r32_to_r32(emit->as, REG_ARG_3, REG_ARG_2);
#elif N_THUMB
asm_thumb_add_rlo_rlo_rlo(emit->as, REG_ARG_2, REG_ARG_2, REG_ARG_3);
#elif N_ARM
asm_arm_add_reg(emit->as, REG_ARG_2, REG_ARG_2, REG_ARG_3);
#else
#error not implemented
#endif
#if N_X64 || N_X86
// special cases for x86 and shifting
if (op == MP_BINARY_OP_LSHIFT
|| op == MP_BINARY_OP_INPLACE_LSHIFT
|| op == MP_BINARY_OP_RSHIFT
|| op == MP_BINARY_OP_INPLACE_RSHIFT) {
#if N_X64
emit_pre_pop_reg_reg(emit, &vtype_rhs, ASM_X64_REG_RCX, &vtype_lhs, REG_RET);
#else
emit_pre_pop_reg_reg(emit, &vtype_rhs, ASM_X86_REG_ECX, &vtype_lhs, REG_RET);
#endif
if (op == MP_BINARY_OP_LSHIFT || op == MP_BINARY_OP_INPLACE_LSHIFT) {
ASM_LSL_REG(emit->as, REG_RET);
} else {
ASM_ASR_REG(emit->as, REG_RET);
}
emit_post_push_reg(emit, VTYPE_INT, REG_RET);
return;
}
#endif
int reg_rhs = REG_ARG_3;
emit_pre_pop_reg_flexible(emit, &vtype_rhs, &reg_rhs);
emit_pre_pop_reg(emit, &vtype_lhs, REG_ARG_2);
if (0) {
// dummy
#if !(N_X64 || N_X86)
} else if (op == MP_BINARY_OP_LSHIFT || op == MP_BINARY_OP_INPLACE_LSHIFT) {
ASM_LSL_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else if (op == MP_BINARY_OP_LESS) {
#if N_X64
asm_x64_xor_r64_to_r64(emit->as, REG_RET, REG_RET);
asm_x64_cmp_r64_with_r64(emit->as, REG_ARG_3, REG_ARG_2);
asm_x64_setcc_r8(emit->as, ASM_X64_CC_JL, REG_RET);
#elif N_X86
asm_x86_xor_r32_to_r32(emit->as, REG_RET, REG_RET);
asm_x86_cmp_r32_with_r32(emit->as, REG_ARG_3, REG_ARG_2);
asm_x86_setcc_r8(emit->as, ASM_X86_CC_JL, REG_RET);
#elif N_THUMB
asm_thumb_cmp_rlo_rlo(emit->as, REG_ARG_2, REG_ARG_3);
asm_thumb_op16(emit->as, ASM_THUMB_OP_ITE_GE);
asm_thumb_mov_rlo_i8(emit->as, REG_RET, 0); // if r0 >= r1
asm_thumb_mov_rlo_i8(emit->as, REG_RET, 1); // if r0 < r1
#elif N_ARM
asm_arm_less_op(emit->as, REG_RET, REG_ARG_2, REG_ARG_3);
#else
#error not implemented
#endif
} else if (op == MP_BINARY_OP_RSHIFT || op == MP_BINARY_OP_INPLACE_RSHIFT) {
ASM_ASR_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
#endif
} else if (op == MP_BINARY_OP_ADD || op == MP_BINARY_OP_INPLACE_ADD) {
ASM_ADD_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else if (op == MP_BINARY_OP_SUBTRACT || op == MP_BINARY_OP_INPLACE_SUBTRACT) {
ASM_SUB_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else if (MP_BINARY_OP_LESS <= op && op <= MP_BINARY_OP_NOT_EQUAL) {
// comparison ops are (in enum order):
// MP_BINARY_OP_LESS
// MP_BINARY_OP_MORE
// MP_BINARY_OP_EQUAL
// MP_BINARY_OP_LESS_EQUAL
// MP_BINARY_OP_MORE_EQUAL
// MP_BINARY_OP_NOT_EQUAL
#if N_X64
asm_x64_xor_r64_r64(emit->as, REG_RET, REG_RET);
asm_x64_cmp_r64_with_r64(emit->as, reg_rhs, REG_ARG_2);
static byte ops[6] = {
ASM_X64_CC_JL,
ASM_X64_CC_JG,
ASM_X64_CC_JE,
ASM_X64_CC_JLE,
ASM_X64_CC_JGE,
ASM_X64_CC_JNE,
};
asm_x64_setcc_r8(emit->as, ops[op - MP_BINARY_OP_LESS], REG_RET);
#elif N_X86
asm_x86_xor_r32_r32(emit->as, REG_RET, REG_RET);
asm_x86_cmp_r32_with_r32(emit->as, reg_rhs, REG_ARG_2);
static byte ops[6] = {
ASM_X86_CC_JL,
ASM_X86_CC_JG,
ASM_X86_CC_JE,
ASM_X86_CC_JLE,
ASM_X86_CC_JGE,
ASM_X86_CC_JNE,
};
asm_x86_setcc_r8(emit->as, ops[op - MP_BINARY_OP_LESS], REG_RET);
#elif N_THUMB
asm_thumb_cmp_rlo_rlo(emit->as, REG_ARG_2, reg_rhs);
static uint16_t ops[6] = {
ASM_THUMB_OP_ITE_GE,
ASM_THUMB_OP_ITE_GT,
ASM_THUMB_OP_ITE_EQ,
ASM_THUMB_OP_ITE_GT,
ASM_THUMB_OP_ITE_GE,
ASM_THUMB_OP_ITE_EQ,
};
static byte ret[6] = { 0, 1, 1, 0, 1, 0, };
asm_thumb_op16(emit->as, ops[op - MP_BINARY_OP_LESS]);
asm_thumb_mov_rlo_i8(emit->as, REG_RET, ret[op - MP_BINARY_OP_LESS]);
asm_thumb_mov_rlo_i8(emit->as, REG_RET, ret[op - MP_BINARY_OP_LESS] ^ 1);
#elif N_ARM
#error generic comparisons for ARM needs implementing
//asm_arm_less_op(emit->as, REG_RET, REG_ARG_2, reg_rhs);
//asm_arm_more_op(emit->as, REG_RET, REG_ARG_2, reg_rhs);
#else
#error not implemented
#endif
emit_post_push_reg(emit, VTYPE_BOOL, REG_RET);
} else {
// TODO other ops not yet implemented
assert(0);
}
} else if (vtype_lhs == VTYPE_PYOBJ && vtype_rhs == VTYPE_PYOBJ) {
emit_pre_pop_reg_reg(emit, &vtype_rhs, REG_ARG_3, &vtype_lhs, REG_ARG_2);
bool invert = false;
if (op == MP_BINARY_OP_NOT_IN) {
invert = true;
@ -1566,7 +1669,7 @@ STATIC void emit_native_binary_op(emit_t *emit, mp_binary_op_t op) {
}
emit_call_with_imm_arg(emit, MP_F_BINARY_OP, op, REG_ARG_1);
if (invert) {
ASM_MOV_REG_TO_REG(emit->as, REG_RET, REG_ARG_2);
ASM_MOV_REG_REG(emit->as, REG_ARG_2, REG_RET);
emit_call_with_imm_arg(emit, MP_F_UNARY_OP, MP_UNARY_OP_NOT, REG_ARG_1);
}
emit_post_push_reg(emit, VTYPE_PYOBJ, REG_RET);