/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2013, 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_ASMTHUMB_H #define MICROPY_INCLUDED_PY_ASMTHUMB_H #include #include "py/misc.h" #include "py/asmbase.h" #define ASM_THUMB_REG_R0 (0) #define ASM_THUMB_REG_R1 (1) #define ASM_THUMB_REG_R2 (2) #define ASM_THUMB_REG_R3 (3) #define ASM_THUMB_REG_R4 (4) #define ASM_THUMB_REG_R5 (5) #define ASM_THUMB_REG_R6 (6) #define ASM_THUMB_REG_R7 (7) #define ASM_THUMB_REG_R8 (8) #define ASM_THUMB_REG_R9 (9) #define ASM_THUMB_REG_R10 (10) #define ASM_THUMB_REG_R11 (11) #define ASM_THUMB_REG_R12 (12) #define ASM_THUMB_REG_R13 (13) #define ASM_THUMB_REG_R14 (14) #define ASM_THUMB_REG_R15 (15) #define ASM_THUMB_REG_SP (ASM_THUMB_REG_R13) #define ASM_THUMB_REG_LR (REG_R14) #define ASM_THUMB_CC_EQ (0x0) #define ASM_THUMB_CC_NE (0x1) #define ASM_THUMB_CC_CS (0x2) #define ASM_THUMB_CC_CC (0x3) #define ASM_THUMB_CC_MI (0x4) #define ASM_THUMB_CC_PL (0x5) #define ASM_THUMB_CC_VS (0x6) #define ASM_THUMB_CC_VC (0x7) #define ASM_THUMB_CC_HI (0x8) #define ASM_THUMB_CC_LS (0x9) #define ASM_THUMB_CC_GE (0xa) #define ASM_THUMB_CC_LT (0xb) #define ASM_THUMB_CC_GT (0xc) #define ASM_THUMB_CC_LE (0xd) typedef struct _asm_thumb_t { mp_asm_base_t base; uint32_t push_reglist; uint32_t stack_adjust; } asm_thumb_t; void asm_thumb_end_pass(asm_thumb_t *as); void asm_thumb_entry(asm_thumb_t *as, int num_locals); void asm_thumb_exit(asm_thumb_t *as); // argument order follows ARM, in general dest is first // note there is a difference between movw and mov.w, and many others! #define ASM_THUMB_OP_IT (0xbf00) #define ASM_THUMB_OP_ITE_EQ (0xbf0c) #define ASM_THUMB_OP_ITE_CS (0xbf2c) #define ASM_THUMB_OP_ITE_MI (0xbf4c) #define ASM_THUMB_OP_ITE_VS (0xbf6c) #define ASM_THUMB_OP_ITE_HI (0xbf8c) #define ASM_THUMB_OP_ITE_GE (0xbfac) #define ASM_THUMB_OP_ITE_GT (0xbfcc) #define ASM_THUMB_OP_NOP (0xbf00) #define ASM_THUMB_OP_WFI (0xbf30) #define ASM_THUMB_OP_CPSID_I (0xb672) // cpsid i, disable irq #define ASM_THUMB_OP_CPSIE_I (0xb662) // cpsie i, enable irq void asm_thumb_op16(asm_thumb_t *as, uint op); void asm_thumb_op32(asm_thumb_t *as, uint op1, uint op2); static inline void asm_thumb_it_cc(asm_thumb_t *as, uint cc, uint mask) { asm_thumb_op16(as, ASM_THUMB_OP_IT | (cc << 4) | mask); } // FORMAT 1: move shifted register #define ASM_THUMB_FORMAT_1_LSL (0x0000) #define ASM_THUMB_FORMAT_1_LSR (0x0800) #define ASM_THUMB_FORMAT_1_ASR (0x1000) #define ASM_THUMB_FORMAT_1_ENCODE(op, rlo_dest, rlo_src, offset) \ ((op) | ((offset) << 6) | ((rlo_src) << 3) | (rlo_dest)) static inline void asm_thumb_format_1(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src, uint offset) { assert(rlo_dest < ASM_THUMB_REG_R8); assert(rlo_src < ASM_THUMB_REG_R8); asm_thumb_op16(as, ASM_THUMB_FORMAT_1_ENCODE(op, rlo_dest, rlo_src, offset)); } // FORMAT 2: add/subtract #define ASM_THUMB_FORMAT_2_ADD (0x1800) #define ASM_THUMB_FORMAT_2_SUB (0x1a00) #define ASM_THUMB_FORMAT_2_REG_OPERAND (0x0000) #define ASM_THUMB_FORMAT_2_IMM_OPERAND (0x0400) #define ASM_THUMB_FORMAT_2_ENCODE(op, rlo_dest, rlo_src, src_b) \ ((op) | ((src_b) << 6) | ((rlo_src) << 3) | (rlo_dest)) static inline void asm_thumb_format_2(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src, int src_b) { assert(rlo_dest < ASM_THUMB_REG_R8); assert(rlo_src < ASM_THUMB_REG_R8); asm_thumb_op16(as, ASM_THUMB_FORMAT_2_ENCODE(op, rlo_dest, rlo_src, src_b)); } static inline void asm_thumb_add_rlo_rlo_rlo(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b) { asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_ADD | ASM_THUMB_FORMAT_2_REG_OPERAND, rlo_dest, rlo_src_a, rlo_src_b); } static inline void asm_thumb_add_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, int i3_src) { asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_ADD | ASM_THUMB_FORMAT_2_IMM_OPERAND, rlo_dest, rlo_src_a, i3_src); } static inline void asm_thumb_sub_rlo_rlo_rlo(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b) { asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_SUB | ASM_THUMB_FORMAT_2_REG_OPERAND, rlo_dest, rlo_src_a, rlo_src_b); } static inline void asm_thumb_sub_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, int i3_src) { asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_SUB | ASM_THUMB_FORMAT_2_IMM_OPERAND, rlo_dest, rlo_src_a, i3_src); } // FORMAT 3: move/compare/add/subtract immediate // These instructions all do zero extension of the i8 value #define ASM_THUMB_FORMAT_3_MOV (0x2000) #define ASM_THUMB_FORMAT_3_CMP (0x2800) #define ASM_THUMB_FORMAT_3_ADD (0x3000) #define ASM_THUMB_FORMAT_3_SUB (0x3800) #define ASM_THUMB_FORMAT_3_ENCODE(op, rlo, i8) ((op) | ((rlo) << 8) | (i8)) static inline void asm_thumb_format_3(asm_thumb_t *as, uint op, uint rlo, int i8) { assert(rlo < ASM_THUMB_REG_R8); asm_thumb_op16(as, ASM_THUMB_FORMAT_3_ENCODE(op, rlo, i8)); } static inline void asm_thumb_mov_rlo_i8(asm_thumb_t *as, uint rlo, int i8) { asm_thumb_format_3(as, ASM_THUMB_FORMAT_3_MOV, rlo, i8); } static inline void asm_thumb_cmp_rlo_i8(asm_thumb_t *as, uint rlo, int i8) { asm_thumb_format_3(as, ASM_THUMB_FORMAT_3_CMP, rlo, i8); } static inline void asm_thumb_add_rlo_i8(asm_thumb_t *as, uint rlo, int i8) { asm_thumb_format_3(as, ASM_THUMB_FORMAT_3_ADD, rlo, i8); } static inline void asm_thumb_sub_rlo_i8(asm_thumb_t *as, uint rlo, int i8) { asm_thumb_format_3(as, ASM_THUMB_FORMAT_3_SUB, rlo, i8); } // FORMAT 4: ALU operations #define ASM_THUMB_FORMAT_4_AND (0x4000) #define ASM_THUMB_FORMAT_4_EOR (0x4040) #define ASM_THUMB_FORMAT_4_LSL (0x4080) #define ASM_THUMB_FORMAT_4_LSR (0x40c0) #define ASM_THUMB_FORMAT_4_ASR (0x4100) #define ASM_THUMB_FORMAT_4_ADC (0x4140) #define ASM_THUMB_FORMAT_4_SBC (0x4180) #define ASM_THUMB_FORMAT_4_ROR (0x41c0) #define ASM_THUMB_FORMAT_4_TST (0x4200) #define ASM_THUMB_FORMAT_4_NEG (0x4240) #define ASM_THUMB_FORMAT_4_CMP (0x4280) #define ASM_THUMB_FORMAT_4_CMN (0x42c0) #define ASM_THUMB_FORMAT_4_ORR (0x4300) #define ASM_THUMB_FORMAT_4_MUL (0x4340) #define ASM_THUMB_FORMAT_4_BIC (0x4380) #define ASM_THUMB_FORMAT_4_MVN (0x43c0) void asm_thumb_format_4(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src); static inline void asm_thumb_cmp_rlo_rlo(asm_thumb_t *as, uint rlo_dest, uint rlo_src) { asm_thumb_format_4(as, ASM_THUMB_FORMAT_4_CMP, rlo_dest, rlo_src); } // FORMAT 5: hi register operations (add, cmp, mov, bx) // For add/cmp/mov, at least one of the args must be a high register #define ASM_THUMB_FORMAT_5_ADD (0x4400) #define ASM_THUMB_FORMAT_5_BX (0x4700) #define ASM_THUMB_FORMAT_5_ENCODE(op, r_dest, r_src) \ ((op) | ((r_dest) << 4 & 0x0080) | ((r_src) << 3) | ((r_dest) & 0x0007)) static inline void asm_thumb_format_5(asm_thumb_t *as, uint op, uint r_dest, uint r_src) { asm_thumb_op16(as, ASM_THUMB_FORMAT_5_ENCODE(op, r_dest, r_src)); } static inline void asm_thumb_add_reg_reg(asm_thumb_t *as, uint r_dest, uint r_src) { asm_thumb_format_5(as, ASM_THUMB_FORMAT_5_ADD, r_dest, r_src); } static inline void asm_thumb_bx_reg(asm_thumb_t *as, uint r_src) { asm_thumb_format_5(as, ASM_THUMB_FORMAT_5_BX, 0, r_src); } // FORMAT 9: load/store with immediate offset // For word transfers the offset must be aligned, and >>2 // FORMAT 10: load/store halfword // The offset must be aligned, and >>1 // The load is zero extended into the register #define ASM_THUMB_FORMAT_9_STR (0x6000) #define ASM_THUMB_FORMAT_9_LDR (0x6800) #define ASM_THUMB_FORMAT_9_WORD_TRANSFER (0x0000) #define ASM_THUMB_FORMAT_9_BYTE_TRANSFER (0x1000) #define ASM_THUMB_FORMAT_10_STRH (0x8000) #define ASM_THUMB_FORMAT_10_LDRH (0x8800) #define ASM_THUMB_FORMAT_9_10_ENCODE(op, rlo_dest, rlo_base, offset) \ ((op) | (((offset) << 6) & 0x07c0) | ((rlo_base) << 3) | (rlo_dest)) static inline void asm_thumb_format_9_10(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_base, uint offset) { asm_thumb_op16(as, ASM_THUMB_FORMAT_9_10_ENCODE(op, rlo_dest, rlo_base, offset)); } static inline void asm_thumb_str_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint word_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_WORD_TRANSFER, rlo_src, rlo_base, word_offset); } static inline void asm_thumb_strb_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint byte_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER, rlo_src, rlo_base, byte_offset); } static inline void asm_thumb_strh_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint byte_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_10_STRH, rlo_src, rlo_base, byte_offset); } static inline void asm_thumb_ldr_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint word_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER, rlo_dest, rlo_base, word_offset); } static inline void asm_thumb_ldrb_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint byte_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER, rlo_dest, rlo_base, byte_offset); } static inline void asm_thumb_ldrh_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint byte_offset) { asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_10_LDRH, rlo_dest, rlo_base, byte_offset); } // TODO convert these to above format style #define ASM_THUMB_OP_MOVW (0xf240) #define ASM_THUMB_OP_MOVT (0xf2c0) void asm_thumb_mov_reg_reg(asm_thumb_t *as, uint reg_dest, uint reg_src); size_t asm_thumb_mov_reg_i16(asm_thumb_t *as, uint mov_op, uint reg_dest, int i16_src); // these return true if the destination is in range, false otherwise bool asm_thumb_b_n_label(asm_thumb_t *as, uint label); bool asm_thumb_bcc_nw_label(asm_thumb_t *as, int cond, uint label, bool wide); bool asm_thumb_bl_label(asm_thumb_t *as, uint label); size_t asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, mp_uint_t i32_src); // convenience void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32_src); // convenience void asm_thumb_mov_local_reg(asm_thumb_t *as, int local_num_dest, uint rlo_src); // convenience void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience void asm_thumb_mov_reg_pcrel(asm_thumb_t *as, uint rlo_dest, uint label); void asm_thumb_ldr_reg_reg_i12_optimised(asm_thumb_t *as, uint reg_dest, uint reg_base, uint byte_offset); // convenience void asm_thumb_b_label(asm_thumb_t *as, uint label); // convenience: picks narrow or wide branch void asm_thumb_bcc_label(asm_thumb_t *as, int cc, uint label); // convenience: picks narrow or wide branch void asm_thumb_bl_ind(asm_thumb_t *as, uint fun_id, uint reg_temp); // convenience // Holds a pointer to mp_fun_table #define ASM_THUMB_REG_FUN_TABLE ASM_THUMB_REG_R7 #if 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_THUMB_REG_R0 #define REG_ARG_1 ASM_THUMB_REG_R0 #define REG_ARG_2 ASM_THUMB_REG_R1 #define REG_ARG_3 ASM_THUMB_REG_R2 #define REG_ARG_4 ASM_THUMB_REG_R3 // rest of args go on stack #define REG_TEMP0 ASM_THUMB_REG_R0 #define REG_TEMP1 ASM_THUMB_REG_R1 #define REG_TEMP2 ASM_THUMB_REG_R2 #define REG_LOCAL_1 ASM_THUMB_REG_R4 #define REG_LOCAL_2 ASM_THUMB_REG_R5 #define REG_LOCAL_3 ASM_THUMB_REG_R6 #define REG_LOCAL_NUM (3) #define REG_FUN_TABLE ASM_THUMB_REG_FUN_TABLE #define ASM_T asm_thumb_t #define ASM_END_PASS asm_thumb_end_pass #define ASM_ENTRY asm_thumb_entry #define ASM_EXIT asm_thumb_exit #define ASM_JUMP asm_thumb_b_label #define ASM_JUMP_IF_REG_ZERO(as, reg, label, bool_test) \ do { \ asm_thumb_cmp_rlo_i8(as, reg, 0); \ asm_thumb_bcc_label(as, ASM_THUMB_CC_EQ, label); \ } while (0) #define ASM_JUMP_IF_REG_NONZERO(as, reg, label, bool_test) \ do { \ asm_thumb_cmp_rlo_i8(as, reg, 0); \ asm_thumb_bcc_label(as, ASM_THUMB_CC_NE, label); \ } while (0) #define ASM_JUMP_IF_REG_EQ(as, reg1, reg2, label) \ do { \ asm_thumb_cmp_rlo_rlo(as, reg1, reg2); \ asm_thumb_bcc_label(as, ASM_THUMB_CC_EQ, label); \ } while (0) #define ASM_JUMP_REG(as, reg) asm_thumb_bx_reg((as), (reg)) #define ASM_CALL_IND(as, idx) asm_thumb_bl_ind(as, idx, ASM_THUMB_REG_R3) #define ASM_MOV_LOCAL_REG(as, local_num, reg) asm_thumb_mov_local_reg((as), (local_num), (reg)) #define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_thumb_mov_reg_i32_optimised((as), (reg_dest), (imm)) #define ASM_MOV_REG_IMM_FIX_U16(as, reg_dest, imm) asm_thumb_mov_reg_i16((as), ASM_THUMB_OP_MOVW, (reg_dest), (imm)) #define ASM_MOV_REG_IMM_FIX_WORD(as, reg_dest, imm) asm_thumb_mov_reg_i32((as), (reg_dest), (imm)) #define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_thumb_mov_reg_local((as), (reg_dest), (local_num)) #define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_thumb_mov_reg_reg((as), (reg_dest), (reg_src)) #define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_thumb_mov_reg_local_addr((as), (reg_dest), (local_num)) #define ASM_MOV_REG_PCREL(as, rlo_dest, label) asm_thumb_mov_reg_pcrel((as), (rlo_dest), (label)) #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_LSR_REG_REG(as, reg_dest, reg_shift) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_LSR, (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_OR_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_ORR, (reg_dest), (reg_src)) #define ASM_XOR_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_EOR, (reg_dest), (reg_src)) #define ASM_AND_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_AND, (reg_dest), (reg_src)) #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)) #define ASM_MUL_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_MUL, (reg_dest), (reg_src)) #define ASM_LOAD_REG_REG(as, reg_dest, reg_base) asm_thumb_ldr_rlo_rlo_i5((as), (reg_dest), (reg_base), 0) #define ASM_LOAD_REG_REG_OFFSET(as, reg_dest, reg_base, word_offset) asm_thumb_ldr_reg_reg_i12_optimised((as), (reg_dest), (reg_base), (word_offset)) #define ASM_LOAD8_REG_REG(as, reg_dest, reg_base) asm_thumb_ldrb_rlo_rlo_i5((as), (reg_dest), (reg_base), 0) #define ASM_LOAD16_REG_REG(as, reg_dest, reg_base) asm_thumb_ldrh_rlo_rlo_i5((as), (reg_dest), (reg_base), 0) #define ASM_LOAD32_REG_REG(as, reg_dest, reg_base) asm_thumb_ldr_rlo_rlo_i5((as), (reg_dest), (reg_base), 0) #define ASM_STORE_REG_REG(as, reg_src, reg_base) asm_thumb_str_rlo_rlo_i5((as), (reg_src), (reg_base), 0) #define ASM_STORE_REG_REG_OFFSET(as, reg_src, reg_base, word_offset) asm_thumb_str_rlo_rlo_i5((as), (reg_src), (reg_base), (word_offset)) #define ASM_STORE8_REG_REG(as, reg_src, reg_base) asm_thumb_strb_rlo_rlo_i5((as), (reg_src), (reg_base), 0) #define ASM_STORE16_REG_REG(as, reg_src, reg_base) asm_thumb_strh_rlo_rlo_i5((as), (reg_src), (reg_base), 0) #define ASM_STORE32_REG_REG(as, reg_src, reg_base) asm_thumb_str_rlo_rlo_i5((as), (reg_src), (reg_base), 0) #endif // GENERIC_ASM_API #endif // MICROPY_INCLUDED_PY_ASMTHUMB_H