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Diffstat (limited to 'circuitpython/py/asmx86.h')
| -rw-r--r-- | circuitpython/py/asmx86.h | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/circuitpython/py/asmx86.h b/circuitpython/py/asmx86.h new file mode 100644 index 0000000..a8fb4e3 --- /dev/null +++ b/circuitpython/py/asmx86.h @@ -0,0 +1,215 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * SPDX-FileCopyrightText: 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" +#include "py/asmbase.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_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 + +// condition codes, used for jcc and setcc (despite their j-name!) +#define ASM_X86_CC_JB (0x2) // below, unsigned +#define ASM_X86_CC_JAE (0x3) // above or equal, 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_JBE (0x6) // below or equal, unsigned +#define ASM_X86_CC_JA (0x7) // above, unsigned +#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 { + mp_asm_base_t base; + int num_locals; +} asm_x86_t; + +static inline void asm_x86_end_pass(asm_x86_t *as) { + (void)as; +} + +void asm_x86_mov_r32_r32(asm_x86_t *as, int dest_r32, int src_r32); +size_t asm_x86_mov_i32_to_r32(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_shr_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_test_r32_with_r32(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_jmp_reg(asm_x86_t *as, int src_r86); +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, int 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_mov_reg_pcrel(asm_x86_t *as, int dest_r64, mp_uint_t label); +void asm_x86_call_ind(asm_x86_t *as, size_t fun_id, mp_uint_t n_args, int temp_r32); + +// Holds a pointer to mp_fun_table +#define ASM_X86_REG_FUN_TABLE ASM_X86_REG_EBP + +#if defined(GENERIC_ASM_API) && GENERIC_ASM_API + +// The following macros provide a (mostly) arch-independent API to +// generate native code, and are used by the native emitter. + +#define ASM_WORD_SIZE (4) + +#define REG_RET ASM_X86_REG_EAX +#define REG_ARG_1 ASM_X86_REG_ARG_1 +#define REG_ARG_2 ASM_X86_REG_ARG_2 +#define REG_ARG_3 ASM_X86_REG_ARG_3 +#define REG_ARG_4 ASM_X86_REG_ARG_4 + +// caller-save, so can be used as temporaries +#define REG_TEMP0 ASM_X86_REG_EAX +#define REG_TEMP1 ASM_X86_REG_ECX +#define REG_TEMP2 ASM_X86_REG_EDX + +// callee-save, so can be used as locals +#define REG_LOCAL_1 ASM_X86_REG_EBX +#define REG_LOCAL_2 ASM_X86_REG_ESI +#define REG_LOCAL_3 ASM_X86_REG_EDI +#define REG_LOCAL_NUM (3) + +// Holds a pointer to mp_fun_table +#define REG_FUN_TABLE ASM_X86_REG_FUN_TABLE + +#define ASM_T asm_x86_t +#define ASM_END_PASS asm_x86_end_pass +#define ASM_ENTRY asm_x86_entry +#define ASM_EXIT asm_x86_exit + +#define ASM_JUMP asm_x86_jmp_label +#define ASM_JUMP_IF_REG_ZERO(as, reg, label, bool_test) \ + do { \ + if (bool_test) { \ + asm_x86_test_r8_with_r8(as, reg, reg); \ + } else { \ + asm_x86_test_r32_with_r32(as, reg, reg); \ + } \ + asm_x86_jcc_label(as, ASM_X86_CC_JZ, label); \ + } while (0) +#define ASM_JUMP_IF_REG_NONZERO(as, reg, label, bool_test) \ + do { \ + if (bool_test) { \ + asm_x86_test_r8_with_r8(as, reg, reg); \ + } else { \ + asm_x86_test_r32_with_r32(as, reg, reg); \ + } \ + asm_x86_jcc_label(as, ASM_X86_CC_JNZ, label); \ + } while (0) +#define ASM_JUMP_IF_REG_EQ(as, reg1, reg2, label) \ + do { \ + asm_x86_cmp_r32_with_r32(as, reg1, reg2); \ + asm_x86_jcc_label(as, ASM_X86_CC_JE, label); \ + } while (0) +#define ASM_JUMP_REG(as, reg) asm_x86_jmp_reg((as), (reg)) +#define ASM_CALL_IND(as, idx) asm_x86_call_ind(as, idx, mp_f_n_args[idx], ASM_X86_REG_EAX) + +#define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_x86_mov_r32_to_local((as), (reg_src), (local_num)) +#define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest)) +#define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest)) +#define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_x86_mov_i32_to_r32((as), (imm), (reg_dest)) +#define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_x86_mov_local_to_r32((as), (local_num), (reg_dest)) +#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_x86_mov_r32_r32((as), (reg_dest), (reg_src)) +#define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_x86_mov_local_addr_to_r32((as), (local_num), (reg_dest)) +#define ASM_MOV_REG_PCREL(as, reg_dest, label) asm_x86_mov_reg_pcrel((as), (reg_dest), (label)) + +#define ASM_LSL_REG(as, reg) asm_x86_shl_r32_cl((as), (reg)) +#define ASM_LSR_REG(as, reg) asm_x86_shr_r32_cl((as), (reg)) +#define ASM_ASR_REG(as, reg) asm_x86_sar_r32_cl((as), (reg)) +#define ASM_OR_REG_REG(as, reg_dest, reg_src) asm_x86_or_r32_r32((as), (reg_dest), (reg_src)) +#define ASM_XOR_REG_REG(as, reg_dest, reg_src) asm_x86_xor_r32_r32((as), (reg_dest), (reg_src)) +#define ASM_AND_REG_REG(as, reg_dest, reg_src) asm_x86_and_r32_r32((as), (reg_dest), (reg_src)) +#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)) +#define ASM_MUL_REG_REG(as, reg_dest, reg_src) asm_x86_mul_r32_r32((as), (reg_dest), (reg_src)) + +#define ASM_LOAD_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem32_to_r32((as), (reg_base), 0, (reg_dest)) +#define ASM_LOAD_REG_REG_OFFSET(as, reg_dest, reg_base, word_offset) asm_x86_mov_mem32_to_r32((as), (reg_base), 4 * (word_offset), (reg_dest)) +#define ASM_LOAD8_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem8_to_r32zx((as), (reg_base), 0, (reg_dest)) +#define ASM_LOAD16_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem16_to_r32zx((as), (reg_base), 0, (reg_dest)) +#define ASM_LOAD32_REG_REG(as, reg_dest, reg_base) asm_x86_mov_mem32_to_r32((as), (reg_base), 0, (reg_dest)) + +#define ASM_STORE_REG_REG(as, reg_src, reg_base) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 0) +#define ASM_STORE_REG_REG_OFFSET(as, reg_src, reg_base, word_offset) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 4 * (word_offset)) +#define ASM_STORE8_REG_REG(as, reg_src, reg_base) asm_x86_mov_r8_to_mem8((as), (reg_src), (reg_base), 0) +#define ASM_STORE16_REG_REG(as, reg_src, reg_base) asm_x86_mov_r16_to_mem16((as), (reg_src), (reg_base), 0) +#define ASM_STORE32_REG_REG(as, reg_src, reg_base) asm_x86_mov_r32_to_mem32((as), (reg_src), (reg_base), 0) + +#endif // GENERIC_ASM_API + +#endif // MICROPY_INCLUDED_PY_ASMX86_H |