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Improved some aspects of SuperFX emulation, Star Fox now executes SuperFX code, but does not stop. [Anonymous]

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This commit is contained in:
Ryan Holtz 2009-08-24 01:57:02 +00:00
parent 1e238433e4
commit 89d4356142
1 changed files with 15 additions and 17 deletions
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32
src/emu/cpu/superfx/superfx.c
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@ -456,18 +456,16 @@ INLINE UINT8 superfx_op_read(superfx_state *cpustate, UINT16 addr)
INLINE UINT8 superfx_peekpipe(superfx_state *cpustate)
{
UINT8 result = cpustate->pipeline;
cpustate->pipeline = superfx_op_read(cpustate, cpustate->r[15]);
cpustate->r15_modified = 0;
return result;
return cpustate->pipeline;
}
INLINE UINT8 superfx_pipe(superfx_state *cpustate)
{
UINT8 result = cpustate->pipeline;
cpustate->pipeline = superfx_op_read(cpustate, ++cpustate->r[15]);
cpustate->r15_modified = 0;
return result;
return cpustate->pipeline;
}
/*****************************************************************************/
@ -737,7 +735,7 @@ static CPU_EXECUTE( superfx )
op = superfx_peekpipe(cpustate);
printf( "Executing op at %06x: %02x\n", (cpustate->pbr << 16) | cpustate->r[15], op );
//printf( "Executing op at %06x: %02x\n", (cpustate->pbr << 16) | cpustate->r[15], op );
switch(op)
{
case 0x00: // STOP
@ -768,14 +766,14 @@ static CPU_EXECUTE( superfx )
superfx_regs_reset(cpustate);
break;
case 0x05: // BRA
superfx_gpr_write(cpustate, 15, cpustate->r[15] + (INT8)superfx_pipe(cpustate));
superfx_gpr_write(cpustate, 15, cpustate->r[15] + (INT8)superfx_pipe(cpustate) + 1 );
break;
case 0x06: // BLT
{
INT32 e = (INT8)superfx_pipe(cpustate);
if((SUPERFX_SFR_S_SET ^ SUPERFX_SFR_OV_SET) == 0)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -784,7 +782,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if((SUPERFX_SFR_S_SET ^ SUPERFX_SFR_OV_SET) == 1)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -793,7 +791,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_Z_SET == 0)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -802,7 +800,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_Z_SET == 1)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -811,7 +809,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_S_SET == 0)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -820,7 +818,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_S_SET == 1)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -829,7 +827,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_CY_SET == 0)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -838,7 +836,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_CY_SET == 1)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -847,7 +845,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_OV_SET == 0)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -856,7 +854,7 @@ static CPU_EXECUTE( superfx )
INT32 e = (INT8)superfx_pipe(cpustate);
if(SUPERFX_SFR_OV_SET == 1)
{
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e);
superfx_gpr_write(cpustate, 15, cpustate->r[15] + e + 1);
}
break;
}
@ -1295,7 +1293,7 @@ static CPU_EXECUTE( superfx )
case 0xe0: case 0xe1: case 0xe2: case 0xe3: case 0xe4: case 0xe5: case 0xe6: case 0xe7:
case 0xe8: case 0xe9: case 0xea: case 0xeb: case 0xec: case 0xed: case 0xee: // DEC
cpustate->r[op & 0xf]++;
cpustate->r[op & 0xf]--;
cpustate->sfr &= ~(SUPERFX_SFR_S | SUPERFX_SFR_Z);
cpustate->sfr |= (cpustate->r[op & 0xf] & 0x8000) ? SUPERFX_SFR_S : 0;
cpustate->sfr |= (cpustate->r[op & 0xf] == 0) ? SUPERFX_SFR_Z : 0;