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z8000: Simplify EXTS[BL]? implementation

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This commit is contained in:
AJR 2021-10-23 13:40:58 -04:00
parent ccb7ac9f6b
commit 3a11f91687
1 changed files with 3 additions and 5 deletions
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8
src/devices/cpu/z8000/z8000ops.hxx
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@ -5662,7 +5662,7 @@ void z8002_device::ZB0_dddd_0000()
void z8002_device::ZB1_dddd_0000()
{
GET_DST(OP0,NIB2);
RW(dst) = (RW(dst) & 0xff) | ((RW(dst) & S08) ? 0xff00 : 0x0000);
RW(dst) = (int16_t)(int8_t)RW(dst);
}
/******************************************
@ -5672,8 +5672,7 @@ void z8002_device::ZB1_dddd_0000()
void z8002_device::ZB1_dddd_0111()
{
GET_DST(OP0,NIB2);
RQ(dst) = concat_64((RQ(dst) & S32) ?
0xfffffffful : 0, extract_64lo(RQ(dst)));
RQ(dst) = (int64_t)(int32_t)RQ(dst);
}
/******************************************
@ -5683,8 +5682,7 @@ void z8002_device::ZB1_dddd_0111()
void z8002_device::ZB1_dddd_1010()
{
GET_DST(OP0,NIB2);
RL(dst) = (RL(dst) & 0xffff) | ((RL(dst) & S16) ?
0xffff0000ul : 0x00000000ul);
RL(dst) = (int32_t)(int16_t)RL(dst);
}
/******************************************