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core: 

- a bit fixes on THUMB opcodes;
This commit is contained in:
mtabachenko 2010-04-26 22:33:08 +00:00
parent d6b75e99ac
commit 8c4d4bb3a1
1 changed files with 7 additions and 9 deletions
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16
desmume/src/thumb_instructions.cpp
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@ -403,8 +403,8 @@ TEMPLATE static u32 FASTCALL OP_CMP_SPE(const u32 i)
cpu->CPSR.bits.N = BIT31(tmp);
cpu->CPSR.bits.Z = tmp == 0;
cpu->CPSR.bits.C = !BorrowFrom(cpu->R[Rn], cpu->R[REG_NUM(i, 3)]);
cpu->CPSR.bits.V = OverflowFromSUB(tmp, cpu->R[Rn], cpu->R[REG_NUM(i, 3)]);
cpu->CPSR.bits.C = !BorrowFrom(cpu->R[Rn], cpu->R[REG_POS(i, 3)]);
cpu->CPSR.bits.V = OverflowFromSUB(tmp, cpu->R[Rn], cpu->R[REG_POS(i, 3)]);
return 1;
}
@ -555,13 +555,11 @@ TEMPLATE static u32 FASTCALL OP_NEG(const u32 i)
TEMPLATE static u32 FASTCALL OP_CMN(const u32 i)
{
u32 tmp = cpu->R[REG_NUM(i, 0)] + cpu->R[REG_NUM(i, 3)];
//emu_halt();
//log::ajouter("OP_CMN THUMB");
cpu->CPSR.bits.N = BIT31(tmp);
cpu->CPSR.bits.Z = tmp == 0;
cpu->CPSR.bits.C = UNSIGNED_OVERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
cpu->CPSR.bits.V = SIGNED_OVERFLOW(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)], tmp);
cpu->CPSR.bits.C = CarryFrom(cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)]);
cpu->CPSR.bits.V = OverflowFromADD(tmp, cpu->R[REG_NUM(i, 0)], cpu->R[REG_NUM(i, 3)]);
return 1;
}
@ -1149,9 +1147,9 @@ TEMPLATE static u32 FASTCALL OP_BLX_THUMB(const u32 i)
u32 Rm = cpu->R[REG_POS(i, 3)];
cpu->CPSR.bits.T = BIT0(Rm);
cpu->R[14] = cpu->next_instruction | 1;
//cpu->R[15] = (Rm & (0xFFFFFFFC|(1<<cpu->CPSR.bits.T)));
cpu->R[15] = (Rm & (0xFFFFFFFC|(1<<cpu->CPSR.bits.T)));
cpu->R[15] = Rm & 0xFFFFFFFE;
cpu->R[14] = cpu->next_instruction | 1;
cpu->next_instruction = cpu->R[15];
return 4;