thumb_load_store_single_reg_imm12_32 caculate wrong instruction whem imm12 is less than 0x40

[sundalin0512]

if imm12 < 0x40,
the instruction generated by thumb_load_store_single_reg_imm12_32 is ldr Rt, [Rn, Rm, LSL imm],
rather than ldr Rt, [Rn, imm]

such as
if we want to generate ldr R1, [R1],
but actually ldr R1, [R1, R0] generated.

[lgeek]

Hi. Could you show me how you're calling thumb_load_store_single_reg_imm12_32? In any case, you probably should use thumb_ldrwi32() instead.

[sundalin0512]

In my case, the instruction is ldr.w r1, [pc, #-80], the opcode is f85f 1050,
generated ldr R1, [R1, R0], but shoule be ldr R1, [R1].
But for ldr.w r1, [pc, #936], opcode is f8df 13a8, the generated instruction is correct.

[sundalin0512]

When upwards == 0 && imm < 0x40, this function generates ldr Rt, [Rn, Rm, LSL imm];
When upwards == 0 && imm >= 0x40 && imm < 0x800, this function generates illegal instruction.

[IgWod]

Since it's an old issue and I have no way of testing it at the moment, I'm going to close it in the effort to clean up the repo. If anyone still requires this fix, please re-open the issue and I can look into it.