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Actually fixed Sign flag in OR opcode

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This commit is contained in:
Angelo Salese 2013-02-11 13:34:58 +00:00
parent 66ac487c03
commit 68d066d50d
1 changed files with 2 additions and 2 deletions
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4
src/mame/machine/scudsp.c
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@ -431,13 +431,13 @@ static void dsp_operation(address_space &space)
case 0x2: /* OR */
i3 = dsp_reg.acl.si | dsp_reg.pl.si;
dsp_reg.alu = (UINT64)(UINT32)i3;
SET_C(0);
SET_S(i3 < 0);
/* TODO: Croc and some early Psygnosis games wants Z to be 1 when the result of this one is negative.
Needs HW tests ... */
if(i3 < 0)
i3 = 0;
SET_Z(i3 == 0);
SET_C(0);
SET_S(i3 < 0);
break;
case 0x3: /* XOR */
i3 = dsp_reg.acl.si ^ dsp_reg.pl.si;