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small cleanup

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This commit is contained in:
Michaël Banaan Ananas 2012-07-18 14:48:14 +00:00
parent 612eb06e76
commit 698fbad58d
1 changed files with 6 additions and 20 deletions
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26
src/emu/cpu/tms32025/tms32025.c
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@ -308,17 +308,6 @@ INLINE void MODIFY_ARP(tms32025_state *cpustate, int data)
cpustate->STR0 |= 0x0400; cpustate->STR0 |= 0x0400;
} }
#ifdef UNUSED_FUNCTION
INLINE void MODIFY_ARB(tms32025_state *cpustate, int data)
{
cpustate->STR1 &= ~ARB_REG;
cpustate->STR1 |= ((data << 13) & ARB_REG);
cpustate->STR1 |= 0x0180;
}
#endif
INLINE UINT16 M_RDROM(tms32025_state *cpustate, offs_t addr) INLINE UINT16 M_RDROM(tms32025_state *cpustate, offs_t addr)
{ {
UINT16 *ram; UINT16 *ram;
@ -1231,7 +1220,7 @@ static void ork(tms32025_state *cpustate)
cpustate->ALU.d = (UINT16)M_RDOP_ARG(cpustate->PC); cpustate->ALU.d = (UINT16)M_RDOP_ARG(cpustate->PC);
cpustate->PC++; cpustate->PC++;
cpustate->ALU.d <<= (cpustate->opcode.b.h & 0xf); cpustate->ALU.d <<= (cpustate->opcode.b.h & 0xf);
cpustate->ACC.d |= (cpustate->ALU.d & 0x7fffffff); cpustate->ACC.d |= (cpustate->ALU.d);
} }
static void out(tms32025_state *cpustate) static void out(tms32025_state *cpustate)
{ {
@ -1445,7 +1434,7 @@ static void sst1(tms32025_state *cpustate)
PUTDATA_SST(cpustate, cpustate->STR1); PUTDATA_SST(cpustate, cpustate->STR1);
} }
static void ssxm(tms32025_state *cpustate) static void ssxm(tms32025_state *cpustate)
{ /** Check instruction description, and make sure right instructions use SXM */ {
SET1(cpustate, SXM_FLAG); SET1(cpustate, SXM_FLAG);
} }
static void stc(tms32025_state *cpustate) static void stc(tms32025_state *cpustate)
@ -1476,22 +1465,21 @@ static void subb(tms32025_state *cpustate)
} }
static void subc(tms32025_state *cpustate) static void subc(tms32025_state *cpustate)
{ {
PAIR temp_alu;
cpustate->oldacc.d = cpustate->ACC.d; cpustate->oldacc.d = cpustate->ACC.d;
GETDATA(cpustate, 15, SXM); GETDATA(cpustate, 15, SXM);
cpustate->ACC.d -= cpustate->ALU.d; /* Temporary switch to ACC. Actual calculation is done as (ACC)-[mem] -> ALU, will be preserved later on. */ cpustate->ACC.d -= cpustate->ALU.d; /* Temporary switch to ACC. Actual calculation is done as (ACC)-[mem] -> ALU, will be preserved later on. */
temp_alu.d = cpustate->ACC.d;
if ((INT32)((cpustate->oldacc.d ^ cpustate->ALU.d) & (cpustate->oldacc.d ^ cpustate->ACC.d)) < 0) { if ((INT32)((cpustate->oldacc.d ^ cpustate->ALU.d) & (cpustate->oldacc.d ^ cpustate->ACC.d)) < 0) {
SET0(cpustate, OV_FLAG); /* Not affected by OVM */ SET0(cpustate, OV_FLAG); /* Not affected by OVM */
} }
CALCULATE_SUB_CARRY(cpustate); CALCULATE_SUB_CARRY(cpustate);
if( cpustate->oldacc.d >= cpustate->ALU.d ) { if( cpustate->oldacc.d >= cpustate->ALU.d ) {
cpustate->ACC.d = (cpustate->oldacc.d - cpustate->ALU.d)*2+1; cpustate->ALU.d = cpustate->ACC.d;
cpustate->ACC.d = cpustate->ACC.d << 1 | 1;
} }
else { else {
cpustate->ACC.d = cpustate->oldacc.d*2; cpustate->ALU.d = cpustate->ACC.d;
cpustate->ACC.d = cpustate->oldacc.d << 1;
} }
cpustate->ALU.d = temp_alu.d;
} }
static void subh(tms32025_state *cpustate) static void subh(tms32025_state *cpustate)
{ {
@ -1569,12 +1557,10 @@ static void xor_(tms32025_state *cpustate)
} }
static void xork(tms32025_state *cpustate) static void xork(tms32025_state *cpustate)
{ {
cpustate->oldacc.d = cpustate->ACC.d;
cpustate->ALU.d = M_RDOP_ARG(cpustate->PC); cpustate->ALU.d = M_RDOP_ARG(cpustate->PC);
cpustate->PC++; cpustate->PC++;
cpustate->ALU.d <<= (cpustate->opcode.b.h & 0xf); cpustate->ALU.d <<= (cpustate->opcode.b.h & 0xf);
cpustate->ACC.d ^= cpustate->ALU.d; cpustate->ACC.d ^= cpustate->ALU.d;
cpustate->ACC.d |= (cpustate->oldacc.d & 0x80000000);
} }
static void zalh(tms32025_state *cpustate) static void zalh(tms32025_state *cpustate)
{ {