318 lines
15 KiB
C
318 lines
15 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef MICROPY_INCLUDED_PY_ASMTHUMB_H
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#define MICROPY_INCLUDED_PY_ASMTHUMB_H
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#include <assert.h>
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#include "py/misc.h"
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#include "py/asmbase.h"
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#define ASM_THUMB_REG_R0 (0)
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#define ASM_THUMB_REG_R1 (1)
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#define ASM_THUMB_REG_R2 (2)
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#define ASM_THUMB_REG_R3 (3)
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#define ASM_THUMB_REG_R4 (4)
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#define ASM_THUMB_REG_R5 (5)
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#define ASM_THUMB_REG_R6 (6)
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#define ASM_THUMB_REG_R7 (7)
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#define ASM_THUMB_REG_R8 (8)
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#define ASM_THUMB_REG_R9 (9)
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#define ASM_THUMB_REG_R10 (10)
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#define ASM_THUMB_REG_R11 (11)
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#define ASM_THUMB_REG_R12 (12)
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#define ASM_THUMB_REG_R13 (13)
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#define ASM_THUMB_REG_R14 (14)
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#define ASM_THUMB_REG_R15 (15)
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#define ASM_THUMB_REG_LR (REG_R14)
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#define ASM_THUMB_CC_EQ (0x0)
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#define ASM_THUMB_CC_NE (0x1)
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#define ASM_THUMB_CC_CS (0x2)
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#define ASM_THUMB_CC_CC (0x3)
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#define ASM_THUMB_CC_MI (0x4)
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#define ASM_THUMB_CC_PL (0x5)
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#define ASM_THUMB_CC_VS (0x6)
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#define ASM_THUMB_CC_VC (0x7)
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#define ASM_THUMB_CC_HI (0x8)
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#define ASM_THUMB_CC_LS (0x9)
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#define ASM_THUMB_CC_GE (0xa)
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#define ASM_THUMB_CC_LT (0xb)
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#define ASM_THUMB_CC_GT (0xc)
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#define ASM_THUMB_CC_LE (0xd)
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typedef struct _asm_thumb_t {
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mp_asm_base_t base;
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uint32_t push_reglist;
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uint32_t stack_adjust;
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} asm_thumb_t;
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void asm_thumb_end_pass(asm_thumb_t *as);
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void asm_thumb_entry(asm_thumb_t *as, int num_locals);
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void asm_thumb_exit(asm_thumb_t *as);
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// argument order follows ARM, in general dest is first
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// note there is a difference between movw and mov.w, and many others!
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#define ASM_THUMB_OP_IT (0xbf00)
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#define ASM_THUMB_OP_ITE_EQ (0xbf0c)
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#define ASM_THUMB_OP_ITE_CS (0xbf2c)
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#define ASM_THUMB_OP_ITE_MI (0xbf4c)
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#define ASM_THUMB_OP_ITE_VS (0xbf6c)
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#define ASM_THUMB_OP_ITE_HI (0xbf8c)
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#define ASM_THUMB_OP_ITE_GE (0xbfac)
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#define ASM_THUMB_OP_ITE_GT (0xbfcc)
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#define ASM_THUMB_OP_NOP (0xbf00)
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#define ASM_THUMB_OP_WFI (0xbf30)
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#define ASM_THUMB_OP_CPSID_I (0xb672) // cpsid i, disable irq
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#define ASM_THUMB_OP_CPSIE_I (0xb662) // cpsie i, enable irq
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void asm_thumb_op16(asm_thumb_t *as, uint op);
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void asm_thumb_op32(asm_thumb_t *as, uint op1, uint op2);
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static inline void asm_thumb_it_cc(asm_thumb_t *as, uint cc, uint mask)
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{ asm_thumb_op16(as, ASM_THUMB_OP_IT | (cc << 4) | mask); }
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// FORMAT 1: move shifted register
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#define ASM_THUMB_FORMAT_1_LSL (0x0000)
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#define ASM_THUMB_FORMAT_1_LSR (0x0800)
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#define ASM_THUMB_FORMAT_1_ASR (0x1000)
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#define ASM_THUMB_FORMAT_1_ENCODE(op, rlo_dest, rlo_src, offset) \
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((op) | ((offset) << 6) | ((rlo_src) << 3) | (rlo_dest))
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static inline void asm_thumb_format_1(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src, uint offset) {
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assert(rlo_dest < ASM_THUMB_REG_R8);
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assert(rlo_src < ASM_THUMB_REG_R8);
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asm_thumb_op16(as, ASM_THUMB_FORMAT_1_ENCODE(op, rlo_dest, rlo_src, offset));
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}
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// FORMAT 2: add/subtract
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#define ASM_THUMB_FORMAT_2_ADD (0x1800)
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#define ASM_THUMB_FORMAT_2_SUB (0x1a00)
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#define ASM_THUMB_FORMAT_2_REG_OPERAND (0x0000)
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#define ASM_THUMB_FORMAT_2_IMM_OPERAND (0x0400)
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#define ASM_THUMB_FORMAT_2_ENCODE(op, rlo_dest, rlo_src, src_b) \
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((op) | ((src_b) << 6) | ((rlo_src) << 3) | (rlo_dest))
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static inline void asm_thumb_format_2(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src, int src_b) {
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assert(rlo_dest < ASM_THUMB_REG_R8);
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assert(rlo_src < ASM_THUMB_REG_R8);
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asm_thumb_op16(as, ASM_THUMB_FORMAT_2_ENCODE(op, rlo_dest, rlo_src, src_b));
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}
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static inline void asm_thumb_add_rlo_rlo_rlo(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b)
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{ asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_ADD | ASM_THUMB_FORMAT_2_REG_OPERAND, rlo_dest, rlo_src_a, rlo_src_b); }
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static inline void asm_thumb_add_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, int i3_src)
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{ asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_ADD | ASM_THUMB_FORMAT_2_IMM_OPERAND, rlo_dest, rlo_src_a, i3_src); }
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static inline void asm_thumb_sub_rlo_rlo_rlo(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, uint rlo_src_b)
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{ asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_SUB | ASM_THUMB_FORMAT_2_REG_OPERAND, rlo_dest, rlo_src_a, rlo_src_b); }
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static inline void asm_thumb_sub_rlo_rlo_i3(asm_thumb_t *as, uint rlo_dest, uint rlo_src_a, int i3_src)
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{ asm_thumb_format_2(as, ASM_THUMB_FORMAT_2_SUB | ASM_THUMB_FORMAT_2_IMM_OPERAND, rlo_dest, rlo_src_a, i3_src); }
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// FORMAT 3: move/compare/add/subtract immediate
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// These instructions all do zero extension of the i8 value
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#define ASM_THUMB_FORMAT_3_MOV (0x2000)
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#define ASM_THUMB_FORMAT_3_CMP (0x2800)
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#define ASM_THUMB_FORMAT_3_ADD (0x3000)
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#define ASM_THUMB_FORMAT_3_SUB (0x3800)
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#define ASM_THUMB_FORMAT_3_ENCODE(op, rlo, i8) ((op) | ((rlo) << 8) | (i8))
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static inline void asm_thumb_format_3(asm_thumb_t *as, uint op, uint rlo, int i8) {
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assert(rlo < ASM_THUMB_REG_R8);
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asm_thumb_op16(as, ASM_THUMB_FORMAT_3_ENCODE(op, rlo, i8));
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}
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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); }
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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); }
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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); }
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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); }
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// FORMAT 4: ALU operations
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#define ASM_THUMB_FORMAT_4_AND (0x4000)
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#define ASM_THUMB_FORMAT_4_EOR (0x4040)
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#define ASM_THUMB_FORMAT_4_LSL (0x4080)
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#define ASM_THUMB_FORMAT_4_LSR (0x40c0)
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#define ASM_THUMB_FORMAT_4_ASR (0x4100)
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#define ASM_THUMB_FORMAT_4_ADC (0x4140)
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#define ASM_THUMB_FORMAT_4_SBC (0x4180)
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#define ASM_THUMB_FORMAT_4_ROR (0x41c0)
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#define ASM_THUMB_FORMAT_4_TST (0x4200)
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#define ASM_THUMB_FORMAT_4_NEG (0x4240)
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#define ASM_THUMB_FORMAT_4_CMP (0x4280)
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#define ASM_THUMB_FORMAT_4_CMN (0x42c0)
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#define ASM_THUMB_FORMAT_4_ORR (0x4300)
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#define ASM_THUMB_FORMAT_4_MUL (0x4340)
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#define ASM_THUMB_FORMAT_4_BIC (0x4380)
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#define ASM_THUMB_FORMAT_4_MVN (0x43c0)
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void asm_thumb_format_4(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src);
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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); }
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// FORMAT 9: load/store with immediate offset
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// For word transfers the offset must be aligned, and >>2
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// FORMAT 10: load/store halfword
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// The offset must be aligned, and >>1
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// The load is zero extended into the register
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#define ASM_THUMB_FORMAT_9_STR (0x6000)
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#define ASM_THUMB_FORMAT_9_LDR (0x6800)
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#define ASM_THUMB_FORMAT_9_WORD_TRANSFER (0x0000)
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#define ASM_THUMB_FORMAT_9_BYTE_TRANSFER (0x1000)
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#define ASM_THUMB_FORMAT_10_STRH (0x8000)
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#define ASM_THUMB_FORMAT_10_LDRH (0x8800)
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#define ASM_THUMB_FORMAT_9_10_ENCODE(op, rlo_dest, rlo_base, offset) \
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((op) | (((offset) << 6) & 0x07c0) | ((rlo_base) << 3) | (rlo_dest))
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static inline void asm_thumb_format_9_10(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_base, uint offset)
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{ asm_thumb_op16(as, ASM_THUMB_FORMAT_9_10_ENCODE(op, rlo_dest, rlo_base, offset)); }
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static inline void asm_thumb_str_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint word_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_WORD_TRANSFER, rlo_src, rlo_base, word_offset); }
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static inline void asm_thumb_strb_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint byte_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_STR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER, rlo_src, rlo_base, byte_offset); }
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static inline void asm_thumb_strh_rlo_rlo_i5(asm_thumb_t *as, uint rlo_src, uint rlo_base, uint byte_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_10_STRH, rlo_src, rlo_base, byte_offset); }
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static inline void asm_thumb_ldr_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint word_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER, rlo_dest, rlo_base, word_offset); }
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static inline void asm_thumb_ldrb_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint byte_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_BYTE_TRANSFER , rlo_dest, rlo_base, byte_offset); }
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static inline void asm_thumb_ldrh_rlo_rlo_i5(asm_thumb_t *as, uint rlo_dest, uint rlo_base, uint byte_offset)
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{ asm_thumb_format_9_10(as, ASM_THUMB_FORMAT_10_LDRH, rlo_dest, rlo_base, byte_offset); }
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// TODO convert these to above format style
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#define ASM_THUMB_OP_MOVW (0xf240)
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#define ASM_THUMB_OP_MOVT (0xf2c0)
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void asm_thumb_mov_reg_reg(asm_thumb_t *as, uint reg_dest, uint reg_src);
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void asm_thumb_mov_reg_i16(asm_thumb_t *as, uint mov_op, uint reg_dest, int i16_src);
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// these return true if the destination is in range, false otherwise
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bool asm_thumb_b_n_label(asm_thumb_t *as, uint label);
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bool asm_thumb_bcc_nw_label(asm_thumb_t *as, int cond, uint label, bool wide);
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bool asm_thumb_bl_label(asm_thumb_t *as, uint label);
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void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, mp_uint_t i32_src); // convenience
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void asm_thumb_mov_reg_i32_optimised(asm_thumb_t *as, uint reg_dest, int i32_src); // convenience
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void asm_thumb_mov_reg_i32_aligned(asm_thumb_t *as, uint reg_dest, int i32); // convenience
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void asm_thumb_mov_local_reg(asm_thumb_t *as, int local_num_dest, uint rlo_src); // convenience
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void asm_thumb_mov_reg_local(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience
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void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint rlo_dest, int local_num); // convenience
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void asm_thumb_b_label(asm_thumb_t *as, uint label); // convenience: picks narrow or wide branch
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void asm_thumb_bcc_label(asm_thumb_t *as, int cc, uint label); // convenience: picks narrow or wide branch
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void asm_thumb_bl_ind(asm_thumb_t *as, void *fun_ptr, uint fun_id, uint reg_temp); // convenience
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#if GENERIC_ASM_API
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// The following macros provide a (mostly) arch-independent API to
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// generate native code, and are used by the native emitter.
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#define ASM_WORD_SIZE (4)
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#define REG_RET ASM_THUMB_REG_R0
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#define REG_ARG_1 ASM_THUMB_REG_R0
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#define REG_ARG_2 ASM_THUMB_REG_R1
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#define REG_ARG_3 ASM_THUMB_REG_R2
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#define REG_ARG_4 ASM_THUMB_REG_R3
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// rest of args go on stack
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#define REG_TEMP0 ASM_THUMB_REG_R0
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#define REG_TEMP1 ASM_THUMB_REG_R1
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#define REG_TEMP2 ASM_THUMB_REG_R2
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#define REG_LOCAL_1 ASM_THUMB_REG_R4
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#define REG_LOCAL_2 ASM_THUMB_REG_R5
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#define REG_LOCAL_3 ASM_THUMB_REG_R6
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#define REG_LOCAL_NUM (3)
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#define ASM_T asm_thumb_t
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#define ASM_END_PASS asm_thumb_end_pass
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#define ASM_ENTRY asm_thumb_entry
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#define ASM_EXIT asm_thumb_exit
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#define ASM_JUMP asm_thumb_b_label
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#define ASM_JUMP_IF_REG_ZERO(as, reg, label) \
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do { \
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asm_thumb_cmp_rlo_i8(as, reg, 0); \
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asm_thumb_bcc_label(as, ASM_THUMB_CC_EQ, label); \
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} while (0)
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#define ASM_JUMP_IF_REG_NONZERO(as, reg, label) \
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do { \
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asm_thumb_cmp_rlo_i8(as, reg, 0); \
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asm_thumb_bcc_label(as, ASM_THUMB_CC_NE, label); \
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} while (0)
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#define ASM_JUMP_IF_REG_EQ(as, reg1, reg2, label) \
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do { \
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asm_thumb_cmp_rlo_rlo(as, reg1, reg2); \
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asm_thumb_bcc_label(as, ASM_THUMB_CC_EQ, label); \
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} while (0)
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#define ASM_CALL_IND(as, ptr, idx) asm_thumb_bl_ind(as, ptr, idx, ASM_THUMB_REG_R3)
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#define ASM_MOV_LOCAL_REG(as, local_num, reg) asm_thumb_mov_local_reg((as), (local_num), (reg))
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#define ASM_MOV_REG_IMM(as, reg_dest, imm) asm_thumb_mov_reg_i32_optimised((as), (reg_dest), (imm))
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#define ASM_MOV_REG_ALIGNED_IMM(as, reg_dest, imm) asm_thumb_mov_reg_i32_aligned((as), (reg_dest), (imm))
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#define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_thumb_mov_reg_local((as), (reg_dest), (local_num))
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#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_thumb_mov_reg_reg((as), (reg_dest), (reg_src))
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#define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_thumb_mov_reg_local_addr((as), (reg_dest), (local_num))
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#define ASM_LSL_REG_REG(as, reg_dest, reg_shift) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_LSL, (reg_dest), (reg_shift))
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#define ASM_ASR_REG_REG(as, reg_dest, reg_shift) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_ASR, (reg_dest), (reg_shift))
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#define ASM_OR_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_ORR, (reg_dest), (reg_src))
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#define ASM_XOR_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_EOR, (reg_dest), (reg_src))
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#define ASM_AND_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_AND, (reg_dest), (reg_src))
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#define ASM_ADD_REG_REG(as, reg_dest, reg_src) asm_thumb_add_rlo_rlo_rlo((as), (reg_dest), (reg_dest), (reg_src))
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#define ASM_SUB_REG_REG(as, reg_dest, reg_src) asm_thumb_sub_rlo_rlo_rlo((as), (reg_dest), (reg_dest), (reg_src))
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#define ASM_MUL_REG_REG(as, reg_dest, reg_src) asm_thumb_format_4((as), ASM_THUMB_FORMAT_4_MUL, (reg_dest), (reg_src))
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#define ASM_LOAD_REG_REG(as, reg_dest, reg_base) asm_thumb_ldr_rlo_rlo_i5((as), (reg_dest), (reg_base), 0)
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#define ASM_LOAD_REG_REG_OFFSET(as, reg_dest, reg_base, word_offset) asm_thumb_ldr_rlo_rlo_i5((as), (reg_dest), (reg_base), (word_offset))
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#define ASM_LOAD8_REG_REG(as, reg_dest, reg_base) asm_thumb_ldrb_rlo_rlo_i5((as), (reg_dest), (reg_base), 0)
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#define ASM_LOAD16_REG_REG(as, reg_dest, reg_base) asm_thumb_ldrh_rlo_rlo_i5((as), (reg_dest), (reg_base), 0)
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#define ASM_LOAD32_REG_REG(as, reg_dest, reg_base) asm_thumb_ldr_rlo_rlo_i5((as), (reg_dest), (reg_base), 0)
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#define ASM_STORE_REG_REG(as, reg_src, reg_base) asm_thumb_str_rlo_rlo_i5((as), (reg_src), (reg_base), 0)
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#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))
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#define ASM_STORE8_REG_REG(as, reg_src, reg_base) asm_thumb_strb_rlo_rlo_i5((as), (reg_src), (reg_base), 0)
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#define ASM_STORE16_REG_REG(as, reg_src, reg_base) asm_thumb_strh_rlo_rlo_i5((as), (reg_src), (reg_base), 0)
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#define ASM_STORE32_REG_REG(as, reg_src, reg_base) asm_thumb_str_rlo_rlo_i5((as), (reg_src), (reg_base), 0)
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#endif // GENERIC_ASM_API
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#endif // MICROPY_INCLUDED_PY_ASMTHUMB_H
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