diff options
Diffstat (limited to 'py/asmthumb.c')
| -rw-r--r-- | py/asmthumb.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/py/asmthumb.c b/py/asmthumb.c index ce9e4fdce..6550d9398 100644 --- a/py/asmthumb.c +++ b/py/asmthumb.c @@ -310,6 +310,15 @@ void asm_thumb_mov_reg_local_addr(asm_thumb_t *as, uint rlo_dest, int local_num) asm_thumb_op16(as, OP_ADD_REG_SP_OFFSET(rlo_dest, word_offset)); } +void asm_thumb_mov_reg_pcrel(asm_thumb_t *as, uint rlo_dest, uint label) { + mp_uint_t dest = get_label_dest(as, label); + mp_int_t rel = dest - as->base.code_offset; + rel -= 4 + 4; // adjust for mov_reg_i16 and then PC+4 prefetch of add_reg_reg + rel |= 1; // to stay in Thumb state when jumping to this address + asm_thumb_mov_reg_i16(as, ASM_THUMB_OP_MOVW, rlo_dest, rel); // 4 bytes + asm_thumb_add_reg_reg(as, rlo_dest, ASM_THUMB_REG_R15); // 2 bytes +} + // this could be wrong, because it should have a range of +/- 16MiB... #define OP_BW_HI(byte_offset) (0xf000 | (((byte_offset) >> 12) & 0x07ff)) #define OP_BW_LO(byte_offset) (0xb800 | (((byte_offset) >> 1) & 0x07ff)) |