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py/asm*: Support assembling code to jump to a register, and get PC+off.

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Useful for position independent code, and implementing state machines.
This commit is contained in:
Damien George
2018-08-16 13:45:24 +10:00
parent f7d6108d1a
commit 2964b41c28
10 changed files with 122 additions and 0 deletions
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4
py/asmarm.h
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@@ -98,6 +98,7 @@ void asm_arm_and_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_eor_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_orr_reg_reg_reg(asm_arm_t *as, uint rd, uint rn, uint rm);
void asm_arm_mov_reg_local_addr(asm_arm_t *as, uint rd, int local_num);
void asm_arm_mov_reg_pcrel(asm_arm_t *as, uint reg_dest, uint label);
void asm_arm_lsl_reg_reg(asm_arm_t *as, uint rd, uint rs);
void asm_arm_asr_reg_reg(asm_arm_t *as, uint rd, uint rs);
@@ -121,6 +122,7 @@ void asm_arm_pop(asm_arm_t *as, uint reglist);
void asm_arm_bcc_label(asm_arm_t *as, int cond, uint label);
void asm_arm_b_label(asm_arm_t *as, uint label);
void asm_arm_bl_ind(asm_arm_t *as, void *fun_ptr, uint fun_id, uint reg_temp);
void asm_arm_bx_reg(asm_arm_t *as, uint reg_src);
#if GENERIC_ASM_API
@@ -165,6 +167,7 @@ void asm_arm_bl_ind(asm_arm_t *as, void *fun_ptr, uint fun_id, uint reg_temp);
asm_arm_cmp_reg_reg(as, reg1, reg2); \
asm_arm_bcc_label(as, ASM_ARM_CC_EQ, label); \
} while (0)
#define ASM_JUMP_REG(as, reg) asm_arm_bx_reg((as), (reg))
#define ASM_CALL_IND(as, ptr, idx) asm_arm_bl_ind(as, ptr, idx, ASM_ARM_REG_R3)
#define ASM_MOV_LOCAL_REG(as, local_num, reg_src) asm_arm_mov_local_reg((as), (local_num), (reg_src))
@@ -173,6 +176,7 @@ void asm_arm_bl_ind(asm_arm_t *as, void *fun_ptr, uint fun_id, uint reg_temp);
#define ASM_MOV_REG_LOCAL(as, reg_dest, local_num) asm_arm_mov_reg_local((as), (reg_dest), (local_num))
#define ASM_MOV_REG_REG(as, reg_dest, reg_src) asm_arm_mov_reg_reg((as), (reg_dest), (reg_src))
#define ASM_MOV_REG_LOCAL_ADDR(as, reg_dest, local_num) asm_arm_mov_reg_local_addr((as), (reg_dest), (local_num))
#define ASM_MOV_REG_PCREL(as, reg_dest, label) asm_arm_mov_reg_pcrel((as), (reg_dest), (label))
#define ASM_LSL_REG_REG(as, reg_dest, reg_shift) asm_arm_lsl_reg_reg((as), (reg_dest), (reg_shift))
#define ASM_ASR_REG_REG(as, reg_dest, reg_shift) asm_arm_asr_reg_reg((as), (reg_dest), (reg_shift))