mirror of
https://github.com/licsber/micropython.git
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8721087661
Improved the Thumb assembler back end. Added many more Thumb instructions to the inline assembler. Improved parsing of assembler instructions and arguments. Assembler functions can now be passed the address of any object that supports the buffer protocol (to get the address of the buffer). Added an example of how to sum numbers from an array in assembler.
162 lines
7.1 KiB
C
162 lines
7.1 KiB
C
#define ASM_THUMB_PASS_1 (1)
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#define ASM_THUMB_PASS_2 (2)
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#define ASM_THUMB_PASS_3 (3)
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#define REG_R0 (0)
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#define REG_R1 (1)
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#define REG_R2 (2)
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#define REG_R3 (3)
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#define REG_R4 (4)
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#define REG_R5 (5)
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#define REG_R6 (6)
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#define REG_R7 (7)
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#define REG_R8 (8)
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#define REG_R9 (9)
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#define REG_R10 (10)
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#define REG_R11 (11)
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#define REG_R12 (12)
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#define REG_R13 (13)
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#define REG_R14 (14)
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#define REG_R15 (15)
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#define REG_LR (REG_R14)
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#define REG_RET REG_R0
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#define REG_ARG_1 REG_R0
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#define REG_ARG_2 REG_R1
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#define REG_ARG_3 REG_R2
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#define REG_ARG_4 REG_R3
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#define THUMB_CC_EQ (0x0)
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#define THUMB_CC_NE (0x1)
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#define THUMB_CC_CS (0x2)
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#define THUMB_CC_CC (0x3)
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#define THUMB_CC_MI (0x4)
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#define THUMB_CC_PL (0x5)
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#define THUMB_CC_VS (0x6)
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#define THUMB_CC_VC (0x7)
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#define THUMB_CC_HI (0x8)
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#define THUMB_CC_LS (0x9)
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#define THUMB_CC_GE (0xa)
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#define THUMB_CC_LT (0xb)
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#define THUMB_CC_GT (0xc)
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#define THUMB_CC_LE (0xd)
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typedef struct _asm_thumb_t asm_thumb_t;
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asm_thumb_t *asm_thumb_new(uint max_num_labels);
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void asm_thumb_free(asm_thumb_t *as, bool free_code);
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void asm_thumb_start_pass(asm_thumb_t *as, int pass);
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void asm_thumb_end_pass(asm_thumb_t *as);
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uint asm_thumb_get_code_size(asm_thumb_t *as);
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void *asm_thumb_get_code(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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void asm_thumb_label_assign(asm_thumb_t *as, uint label);
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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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// 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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void asm_thumb_format_2(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_src, int src_b);
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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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void asm_thumb_format_3(asm_thumb_t *as, uint op, uint rlo, int i8);
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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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void asm_thumb_format_9_10(asm_thumb_t *as, uint op, uint rlo_dest, uint rlo_base, uint 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_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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// TODO convert these to above format style
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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_movw_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src);
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void asm_thumb_movt_reg_i16(asm_thumb_t *as, uint reg_dest, int i16_src);
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void asm_thumb_ite_ge(asm_thumb_t *as);
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void asm_thumb_b_n(asm_thumb_t *as, uint label);
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void asm_thumb_bcc_n(asm_thumb_t *as, int cond, uint label);
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void asm_thumb_mov_reg_i32(asm_thumb_t *as, uint reg_dest, machine_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_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 ?
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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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