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/*

* This file is part of the Micro Python project, http://micropython.org/

*

* The MIT License (MIT)

*

* Copyright (c) 2014 Damien P. George

*

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included in

* all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

* THE SOFTWARE.

*/

#ifndef __MICROPY_INCLUDED_PY_ASMX86_H__

#define __MICROPY_INCLUDED_PY_ASMX86_H__

#include "py/mpconfig.h"

#include "py/misc.h"

// x86 cdecl calling convention is:

// - args passed on the stack in reverse order

// - return value in EAX

// - caller cleans up the stack after a call

// - stack must be aligned to 16-byte boundary before all calls

// - 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)

#define ASM_X86_REG_EAX (0)

#define ASM_X86_REG_ECX (1)

#define ASM_X86_REG_EDX (2)

#define ASM_X86_REG_EBX (3)

#define ASM_X86_REG_ESP (4)

#define ASM_X86_REG_EBP (5)

#define ASM_X86_REG_ESI (6)

#define ASM_X86_REG_EDI (7)

// x86 passes values on the stack, but the emitter is register based, so we need

// to define registers that can temporarily hold the function arguments. They

// need to be defined here so that asm_x86_call_ind can push them onto the stack

// before the call.

#define ASM_X86_REG_ARG_1 ASM_X86_REG_EAX

#define ASM_X86_REG_ARG_2 ASM_X86_REG_ECX

#define ASM_X86_REG_ARG_3 ASM_X86_REG_EDX

#define ASM_X86_REG_ARG_4 ASM_X86_REG_EBX

#define ASM_X86_REG_ARG_5 ASM_X86_REG_ESI

// condition codes, used for jcc and setcc (despite their j-name!)

#define ASM_X86_CC_JB (0x2) // below, unsigned

#define ASM_X86_CC_JZ (0x4)

#define ASM_X86_CC_JE (0x4)

#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;

asm_x86_t* asm_x86_new(mp_uint_t max_num_labels);

void asm_x86_free(asm_x86_t* as, bool free_code);

void asm_x86_start_pass(asm_x86_t *as, mp_uint_t pass);

void asm_x86_end_pass(asm_x86_t *as);

mp_uint_t asm_x86_get_code_pos(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_align(asm_x86_t *as, mp_uint_t align);

void asm_x86_data(asm_x86_t *as, mp_uint_t bytesize, mp_uint_t val);

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_mem8(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);

void asm_x86_mov_r16_to_mem16(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);

void asm_x86_mov_r32_to_mem32(asm_x86_t *as, int src_r32, int dest_r32, int dest_disp);

void asm_x86_mov_mem8_to_r32zx(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);

void asm_x86_mov_mem16_to_r32zx(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);

void asm_x86_mov_mem32_to_r32(asm_x86_t *as, int src_r32, int src_disp, int dest_r32);

void asm_x86_and_r32_r32(asm_x86_t *as, int dest_r32, int src_r32);

void asm_x86_or_r32_r32(asm_x86_t *as, int dest_r32, int src_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_mul_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);

void asm_x86_label_assign(asm_x86_t* as, mp_uint_t label);

void asm_x86_jmp_label(asm_x86_t* as, mp_uint_t label);

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);

void asm_x86_exit(asm_x86_t* as);

void asm_x86_mov_arg_to_r32(asm_x86_t *as, int src_arg_num, int dest_r32);

void asm_x86_mov_local_to_r32(asm_x86_t* as, int src_local_num, int dest_r32);

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);

void asm_x86_call_ind(asm_x86_t* as, void* ptr, mp_uint_t n_args, int temp_r32);

#endif // __MICROPY_INCLUDED_PY_ASMX86_H__