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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
View File

@ -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;
}

5
src/core/arm/interpreter/armsupp.cpp
View File

@ -227,8 +227,9 @@ ARMul_CPSRAltered (ARMul_State * state)
//state->Cpsr &= ~CBIT;
ASSIGNV ((state->Cpsr & VBIT) != 0);
//state->Cpsr &= ~VBIT;
ASSIGNS ((state->Cpsr & SBIT) != 0);
//state->Cpsr &= ~SBIT;
ASSIGNQ ((state->Cpsr & QBIT) != 0);
//state->Cpsr &= ~QBIT;
state->GEFlag = (state->Cpsr & 0x000F0000);
#ifdef MODET
ASSIGNT ((state->Cpsr & TBIT) != 0);
//state->Cpsr &= ~TBIT;

2
src/core/arm/skyeye_common/armdefs.h
View File

@ -198,7 +198,7 @@ struct ARMul_State
//ARMword translate_pc;
/* add armv6 flags dyf:2010-08-09 */
ARMword GEFlag, EFlag, AFlag, QFlags;
ARMword GEFlag, EFlag, AFlag, QFlag;
//chy:2003-08-19, used in arm v5e|xscale
ARMword SFlag;
#ifdef MODET

7
src/core/arm/skyeye_common/armemu.h
View File

@ -34,7 +34,7 @@
#define ZBIT (1L << 30)
#define CBIT (1L << 29)
#define VBIT (1L << 28)
#define SBIT (1L << 27)
#define QBIT (1L << 27)
#define IBIT (1L << 7)
#define FBIT (1L << 6)
#define IFBITS (3L << 6)
@ -156,13 +156,14 @@
#define R15PCMODE (state->Reg[15] & (R15PCBITS | R15MODEBITS))
#define R15MODE (state->Reg[15] & R15MODEBITS)
#define ECC ((NFLAG << 31) | (ZFLAG << 30) | (CFLAG << 29) | (VFLAG << 28) | (SFLAG << 27))
#define ECC ((NFLAG << 31) | (ZFLAG << 30) | (CFLAG << 29) | (VFLAG << 28) | (QFLAG << 27))
#define EINT (IFFLAGS << 6)
#define ER15INT (IFFLAGS << 26)
#define EMODE (state->Mode)
#define EGEBITS (state->GEFlag & 0x000F0000)
#ifdef MODET
#define CPSR (ECC | EINT | EMODE | (TFLAG << 5))
#define CPSR (ECC | EGEBITS | (EFLAG << 9) | (AFLAG << 8) | EINT | (TFLAG << 5) | EMODE)
#else
#define CPSR (ECC | EINT | EMODE)
#endif