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armemu: Fix construction of the CPSR

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This commit is contained in:
Lioncash 2014-12-22 22:10:47 -05:00
parent 2188af4a65
commit 8e2accd974
4 changed files with 54 additions and 15 deletions
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55
src/core/arm/interpreter/armemu.cpp
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@ -5877,6 +5877,8 @@ L_stm_s_takeabort:
state->Cpsr &= ~(1 << 18);
state->Cpsr &= ~(1 << 19);
}
ARMul_CPSRAltered(state);
return 1;
}
// SADD8/SSUB8
@ -5948,6 +5950,7 @@ L_stm_s_takeabort:
state->Cpsr &= ~(1 << 19);
}
ARMul_CPSRAltered(state);
state->Reg[rd_idx] = (lo_val1 | lo_val2 << 8 | hi_val1 << 16 | hi_val2 << 24);
return 1;
}
@ -6024,15 +6027,33 @@ L_stm_s_takeabort:
if ((instr & 0x0F0) == 0x070) { // USUB16
h1 = ((u16)from - (u16)to);
h2 = ((u16)(from >> 16) - (u16)(to >> 16));
if (!(h1 & 0xffff0000)) state->Cpsr |= (3 << 16);
if (!(h2 & 0xffff0000)) state->Cpsr |= (3 << 18);
if (!(h1 & 0xffff0000))
state->Cpsr |= (3 << 16);
else
state->Cpsr &= ~(3 << 16);
if (!(h2 & 0xffff0000))
state->Cpsr |= (3 << 18);
else
state->Cpsr &= ~(3 << 18);
}
else { // UADD16
h1 = ((u16)from + (u16)to);
h2 = ((u16)(from >> 16) + (u16)(to >> 16));
if (h1 & 0xffff0000) state->Cpsr |= (3 << 16);
if (h2 & 0xffff0000) state->Cpsr |= (3 << 18);
if (h1 & 0xffff0000)
state->Cpsr |= (3 << 16);
else
state->Cpsr &= ~(3 << 16);
if (h2 & 0xffff0000)
state->Cpsr |= (3 << 18);
else
state->Cpsr &= ~(3 << 18);
}
ARMul_CPSRAltered(state);
state->Reg[rd] = (u32)((h1 & 0xffff) | ((h2 & 0xffff) << 16));
return 1;
}
@ -6045,10 +6066,26 @@ L_stm_s_takeabort:
b2 = ((u8)(from >> 8) - (u8)(to >> 8));
b3 = ((u8)(from >> 16) - (u8)(to >> 16));
b4 = ((u8)(from >> 24) - (u8)(to >> 24));
if (!(b1 & 0xffffff00)) state->Cpsr |= (1 << 16);
if (!(b2 & 0xffffff00)) state->Cpsr |= (1 << 17);
if (!(b3 & 0xffffff00)) state->Cpsr |= (1 << 18);
if (!(b4 & 0xffffff00)) state->Cpsr |= (1 << 19);
if (!(b1 & 0xffffff00))
state->Cpsr |= (1 << 16);
else
state->Cpsr &= ~(1 << 16);
if (!(b2 & 0xffffff00))
state->Cpsr |= (1 << 17);
else
state->Cpsr &= ~(1 << 17);
if (!(b3 & 0xffffff00))
state->Cpsr |= (1 << 18);
else
state->Cpsr &= ~(1 << 18);
if (!(b4 & 0xffffff00))
state->Cpsr |= (1 << 19);
else
state->Cpsr &= ~(1 << 19);
}
else { // UADD8
b1 = ((u8)from + (u8)to);
@ -6071,13 +6108,13 @@ L_stm_s_takeabort:
else
state->Cpsr &= ~(1 << 18);
if (b4 & 0xffffff00)
state->Cpsr |= (1 << 19);
else
state->Cpsr &= ~(1 << 19);
}
ARMul_CPSRAltered(state);
state->Reg[rd] = (u32)(b1 | (b2 & 0xff) << 8 | (b3 & 0xff) << 16 | (b4 & 0xff) << 24);
return 1;
}