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H8: implement ldc #imm, ccr and rotr.w Rx for csplayh5 [R. Belmont]

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R. Belmont 2010-12-19 17:40:00 +00:00
parent 58474e87bd
commit 673f5bef0f
1 changed files with 39 additions and 0 deletions
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39
src/emu/cpu/h83002/h8ops.h
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@ -64,6 +64,8 @@ static UINT8 h8_rotxl8(h83xx_state *h8, UINT8 src);
static UINT16 h8_rotxl16(h83xx_state *h8, UINT16 src);
static UINT32 h8_rotxl32(h83xx_state *h8, UINT32 src);
static UINT16 h8_rotr16(h83xx_state *h8, UINT16 src);
static UINT8 h8_rotxr8(h83xx_state *h8, UINT8 src);
static UINT16 h8_rotxr16(h83xx_state *h8, UINT16 src);
@ -520,7 +522,11 @@ static void h8_group0(h83xx_state *h8, UINT16 opcode)
h8_set_ccr(h8, udata8);
H8_IFETCH_TIMING(1)
break;
case 0x7:
// ldc
h8_set_ccr(h8, opcode & 0xff);
H8_IFETCH_TIMING(1)
break;
case 0x8:
// add.b rx, ry
dstreg = opcode & 0xf;
@ -884,6 +890,13 @@ static void h8_group1(h83xx_state *h8, UINT16 opcode)
h8_setreg16(h8, opcode & 0xf, udata16);
H8_IFETCH_TIMING(1);
break;
case 0x9:
// rotr.w Rx
udata16 = h8_getreg16(h8, opcode & 0xf);
udata16 = h8_rotr16(h8, udata16);
h8_setreg16(h8, opcode & 0xf, udata16);
H8_IFETCH_TIMING(1);
break;
default:
logerror("H8/3xx: Unk. group 1 3 %x\n", opcode);
h8->h8err = 1;
@ -2826,6 +2839,32 @@ static UINT8 h8_rotxr8(h83xx_state *h8, UINT8 src)
return res;
}
static UINT16 h8_rotr16(h83xx_state *h8, UINT16 src)
{
UINT16 res;
// rotate right, not through carry
res = src>>1;
if (src & 1) res |= 0x8000; // put cflag in upper bit
h8->h8cflag = src & 1;
// N and Z modified
h8->h8nflag = (res>>15) & 1;
h8->h8vflag = 0;
// zflag
if(res==0)
{
h8->h8zflag = 1;
}
else
{
h8->h8zflag = 0;
}
return res;
}
static UINT16 h8_rotxr16(h83xx_state *h8, UINT16 src)
{
UINT16 res;