mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-09-29 18:28:35 +02:00
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
static bool dyn_helper_divb(Bit8u val) {
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if (!val) return CPU_PrepareException(0,0);
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Bitu quo=reg_ax / val;
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Bit8u rem=(Bit8u)(reg_ax % val);
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Bit8u quo8=(Bit8u)(quo&0xff);
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if (quo>0xff) return CPU_PrepareException(0,0);
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reg_ah=rem;
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reg_al=quo8;
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return false;
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}
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static bool dyn_helper_idivb(Bit8s val) {
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if (!val) return CPU_PrepareException(0,0);
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Bits quo=(Bit16s)reg_ax / val;
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Bit8s rem=(Bit8s)((Bit16s)reg_ax % val);
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Bit8s quo8s=(Bit8s)(quo&0xff);
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if (quo!=(Bit16s)quo8s) return CPU_PrepareException(0,0);
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reg_ah=rem;
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reg_al=quo8s;
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return false;
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}
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static bool dyn_helper_divw(Bit16u val) {
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if (!val) return CPU_PrepareException(0,0);
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Bitu num=(reg_dx<<16)|reg_ax;
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Bitu quo=num/val;
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Bit16u rem=(Bit16u)(num % val);
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Bit16u quo16=(Bit16u)(quo&0xffff);
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if (quo!=(Bit32u)quo16) return CPU_PrepareException(0,0);
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reg_dx=rem;
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reg_ax=quo16;
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return false;
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}
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static bool dyn_helper_idivw(Bit16s val) {
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if (!val) return CPU_PrepareException(0,0);
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Bits num=(reg_dx<<16)|reg_ax;
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Bits quo=num/val;
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Bit16s rem=(Bit16s)(num % val);
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Bit16s quo16s=(Bit16s)quo;
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if (quo!=(Bit32s)quo16s) return CPU_PrepareException(0,0);
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reg_dx=rem;
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reg_ax=quo16s;
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return false;
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}
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static bool dyn_helper_divd(Bit32u val) {
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if (!val) return CPU_PrepareException(0,0);
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Bit64u num=(((Bit64u)reg_edx)<<32)|reg_eax;
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Bit64u quo=num/val;
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Bit32u rem=(Bit32u)(num % val);
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Bit32u quo32=(Bit32u)(quo&0xffffffff);
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if (quo!=(Bit64u)quo32) return CPU_PrepareException(0,0);
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reg_edx=rem;
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reg_eax=quo32;
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return false;
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}
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static bool dyn_helper_idivd(Bit32s val) {
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if (!val) return CPU_PrepareException(0,0);
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Bit64s num=(((Bit64u)reg_edx)<<32)|reg_eax;
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Bit64s quo=num/val;
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Bit32s rem=(Bit32s)(num % val);
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Bit32s quo32s=(Bit32s)(quo&0xffffffff);
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if (quo!=(Bit64s)quo32s) return CPU_PrepareException(0,0);
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reg_edx=rem;
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reg_eax=quo32s;
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return false;
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}
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