yuzu-emu
/
yuzu
Archived
1
0
Fork 0
Code

Merge pull request #335 from lioncash/cpsrcreate 

armemu: Emulate the GE and Q flags.
This commit is contained in:
bunnei 2014-12-23 09:43:46 -05:00
parent 949d95659e 6446331938
commit 53447da142
4 changed files with 78 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
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;
}
@ -6116,7 +6153,7 @@ L_stm_s_takeabort:
u32 rm = (instr >> 0) & 0xF;
u32 from = state->Reg[rn];
u32 to = state->Reg[rm];
u32 cpsr = state->Cpsr;
u32 cpsr = ARMul_GetCPSR(state);
if ((instr & 0xFF0) == 0xFB0) { // SEL
u32 result;
if (cpsr & (1 << 16))
@ -6172,16 +6209,23 @@ L_stm_s_takeabort:
s16 rn_lo = (state->Reg[rn_idx]);
s16 rn_hi = (state->Reg[rn_idx] >> 16);
if (rn_lo > max)
if (rn_lo > max) {
rn_lo = max;
else if (rn_lo < min)
state->Cpsr |= (1 << 27);
} else if (rn_lo < min) {
rn_lo = min;
state->Cpsr |= (1 << 27);
}
if (rn_hi > max)
if (rn_hi > max) {
rn_hi = max;
else if (rn_hi < min)
state->Cpsr |= (1 << 27);
} else if (rn_hi < min) {
rn_hi = min;
state->Cpsr |= (1 << 27);
}
ARMul_CPSRAltered(state);
state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi & 0xFFFF) << 16);
return 1;
}
@ -6313,16 +6357,23 @@ L_stm_s_takeabort:
s16 rn_lo = (state->Reg[rn_idx]);
s16 rn_hi = (state->Reg[rn_idx] >> 16);
if (max < rn_lo)
if (max < rn_lo) {
rn_lo = max;
else if (rn_lo < 0)
state->Cpsr |= (1 << 27);
} else if (rn_lo < 0) {
rn_lo = 0;
state->Cpsr |= (1 << 27);
}
if (max < rn_hi)
if (max < rn_hi) {
rn_hi = max;
else if (rn_hi < 0)
state->Cpsr |= (1 << 27);
} else if (rn_hi < 0) {
rn_hi = 0;
state->Cpsr |= (1 << 27);
}
ARMul_CPSRAltered(state);
state->Reg[rd_idx] = (rn_lo & 0xFFFF) | ((rn_hi << 16) & 0xFFFF);
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