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py: Code clean-up in native emitter; improve thumb native calls.

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This commit is contained in:
Damien George
2014-08-16 22:31:57 +01:00
parent 86de21b810
commit 7fe2191c9b
4 changed files with 74 additions and 71 deletions
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13
py/asmthumb.c
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@@ -496,17 +496,14 @@ void asm_thumb_bl_ind(asm_thumb_t *as, void *fun_ptr, uint fun_id, uint reg_temp
asm_thumb_op16(as, 0x4780 | (REG_R9 << 3)); // blx reg
*/
if (0) {
// load ptr to function into register using immediate, then branch
// not relocatable
asm_thumb_mov_reg_i32(as, reg_temp, (mp_uint_t)fun_ptr);
asm_thumb_op16(as, OP_BLX(reg_temp));
} else if (1) {
if (fun_id < 32) {
// load ptr to function from table, indexed by fun_id (must be in range 0-31); 4 bytes
asm_thumb_op16(as, OP_FORMAT_9_10(ASM_THUMB_FORMAT_9_LDR | ASM_THUMB_FORMAT_9_WORD_TRANSFER, reg_temp, REG_R7, fun_id));
asm_thumb_op16(as, OP_BLX(reg_temp));
} else {
// use SVC
asm_thumb_op16(as, OP_SVC(fun_id));
// load ptr to function into register using immediate; 6 bytes
asm_thumb_mov_reg_i32(as, reg_temp, (mp_uint_t)fun_ptr);
asm_thumb_op16(as, OP_BLX(reg_temp));
}
}