diff options
Diffstat (limited to 'py/asmarm.c')
| -rw-r--r-- | py/asmarm.c | 50 |
1 files changed, 26 insertions, 24 deletions
diff --git a/py/asmarm.c b/py/asmarm.c index 532232155..be50a991b 100644 --- a/py/asmarm.c +++ b/py/asmarm.c @@ -36,6 +36,8 @@ #include "py/asmarm.h" +#define REG_TEMP ASM_ARM_REG_R8 + #define SIGNED_FIT24(x) (((x) & 0xff800000) == 0) || (((x) & 0xff000000) == 0xff000000) // Insert word into instruction flow @@ -171,8 +173,8 @@ void asm_arm_entry(asm_arm_t *as, int num_locals) { if (as->stack_adjust < 0x100) { emit_al(as, asm_arm_op_sub_imm(ASM_ARM_REG_SP, ASM_ARM_REG_SP, as->stack_adjust)); } else { - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, as->stack_adjust); - emit_al(as, asm_arm_op_sub_reg(ASM_ARM_REG_SP, ASM_ARM_REG_SP, ASM_ARM_REG_R8)); + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, as->stack_adjust); + emit_al(as, asm_arm_op_sub_reg(ASM_ARM_REG_SP, ASM_ARM_REG_SP, REG_TEMP)); } } } @@ -182,8 +184,8 @@ void asm_arm_exit(asm_arm_t *as) { if (as->stack_adjust < 0x100) { emit_al(as, asm_arm_op_add_imm(ASM_ARM_REG_SP, ASM_ARM_REG_SP, as->stack_adjust)); } else { - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, as->stack_adjust); - emit_al(as, asm_arm_op_add_reg(ASM_ARM_REG_SP, ASM_ARM_REG_SP, ASM_ARM_REG_R8)); + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, as->stack_adjust); + emit_al(as, asm_arm_op_add_reg(ASM_ARM_REG_SP, ASM_ARM_REG_SP, REG_TEMP)); } } @@ -293,10 +295,10 @@ 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) { if (local_num >= 0x40) { - // mov r8, #local_num*4 - // add rd, sp, r8 - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, local_num << 2); - emit_al(as, asm_arm_op_add_reg(rd, ASM_ARM_REG_SP, ASM_ARM_REG_R8)); + // mov temp, #local_num*4 + // add rd, sp, temp + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, local_num << 2); + emit_al(as, asm_arm_op_add_reg(rd, ASM_ARM_REG_SP, REG_TEMP)); } else { // add rd, sp, #local_num*4 emit_al(as, asm_arm_op_add_imm(rd, ASM_ARM_REG_SP, local_num << 2)); @@ -338,10 +340,10 @@ void asm_arm_ldr_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offse // ldr rd, [rn, #off] emit_al(as, 0x5900000 | (rn << 16) | (rd << 12) | byte_offset); } else { - // mov r8, #off - // ldr rd, [rn, r8] - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, byte_offset); - emit_al(as, 0x7900000 | (rn << 16) | (rd << 12) | ASM_ARM_REG_R8); + // mov temp, #off + // ldr rd, [rn, temp] + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, byte_offset); + emit_al(as, 0x7900000 | (rn << 16) | (rd << 12) | REG_TEMP); } } @@ -352,8 +354,8 @@ void asm_arm_ldrh_reg_reg(asm_arm_t *as, uint rd, uint rn) { void asm_arm_ldrh_reg_reg_reg(asm_arm_t *as, uint rd, uint rm, uint rn) { // ldrh doesn't support scaled register index - emit_al(as, 0x1a00080 | (ASM_ARM_REG_R8 << 12) | rn); // mov r8, rn, lsl #1 - emit_al(as, 0x19000b0 | (rm << 16) | (rd << 12) | ASM_ARM_REG_R8); // ldrh rd, [rm, r8]; + emit_al(as, 0x1a00080 | (REG_TEMP << 12) | rn); // mov temp, rn, lsl #1 + emit_al(as, 0x19000b0 | (rm << 16) | (rd << 12) | REG_TEMP); // ldrh rd, [rm, temp]; } void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offset) { @@ -361,10 +363,10 @@ void asm_arm_ldrh_reg_reg_offset(asm_arm_t *as, uint rd, uint rn, uint byte_offs // ldrh rd, [rn, #off] emit_al(as, 0x1d000b0 | (rn << 16) | (rd << 12) | ((byte_offset & 0xf0) << 4) | (byte_offset & 0xf)); } else { - // mov r8, #off - // ldrh rd, [rn, r8] - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, byte_offset); - emit_al(as, 0x19000b0 | (rn << 16) | (rd << 12) | ASM_ARM_REG_R8); + // mov temp, #off + // ldrh rd, [rn, temp] + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, byte_offset); + emit_al(as, 0x19000b0 | (rn << 16) | (rd << 12) | REG_TEMP); } } @@ -388,10 +390,10 @@ void asm_arm_str_reg_reg_offset(asm_arm_t *as, uint rd, uint rm, uint byte_offse // str rd, [rm, #off] emit_al(as, 0x5800000 | (rm << 16) | (rd << 12) | byte_offset); } else { - // mov r8, #off - // str rd, [rm, r8] - asm_arm_mov_reg_i32_optimised(as, ASM_ARM_REG_R8, byte_offset); - emit_al(as, 0x7800000 | (rm << 16) | (rd << 12) | ASM_ARM_REG_R8); + // mov temp, #off + // str rd, [rm, temp] + asm_arm_mov_reg_i32_optimised(as, REG_TEMP, byte_offset); + emit_al(as, 0x7800000 | (rm << 16) | (rd << 12) | REG_TEMP); } } @@ -412,8 +414,8 @@ void asm_arm_str_reg_reg_reg(asm_arm_t *as, uint rd, uint rm, uint rn) { void asm_arm_strh_reg_reg_reg(asm_arm_t *as, uint rd, uint rm, uint rn) { // strh doesn't support scaled register index - emit_al(as, 0x1a00080 | (ASM_ARM_REG_R8 << 12) | rn); // mov r8, rn, lsl #1 - emit_al(as, 0x18000b0 | (rm << 16) | (rd << 12) | ASM_ARM_REG_R8); // strh rd, [rm, r8] + emit_al(as, 0x1a00080 | (REG_TEMP << 12) | rn); // mov temp, rn, lsl #1 + emit_al(as, 0x18000b0 | (rm << 16) | (rd << 12) | REG_TEMP); // strh rd, [rm, temp] } void asm_arm_strb_reg_reg_reg(asm_arm_t *as, uint rd, uint rm, uint rn) { |