80486DX2-66/86Box-fork
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7c67305d67e367063f11c94f1c699de38de13b7f
86Box-fork/src/x86_ops_mul.h

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7.2 KiB
C
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static int opIMUL_w_iw_a16(uint32_t fetchdat)
{
int32_t templ;
int16_t tempw, tempw2;
fetch_ea_16(fetchdat);
tempw = geteaw(); if (abrt) return 1;
tempw2 = getword(); if (abrt) return 1;
templ = ((int)tempw) * ((int)tempw2);
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].w = templ & 0xffff;
CLOCK_CYCLES((mod == 3) ? 14 : 17);
return 0;
}
static int opIMUL_w_iw_a32(uint32_t fetchdat)
{
int32_t templ;
int16_t tempw, tempw2;
fetch_ea_32(fetchdat);
tempw = geteaw(); if (abrt) return 1;
tempw2 = getword(); if (abrt) return 1;
templ = ((int)tempw) * ((int)tempw2);
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].w = templ & 0xffff;
CLOCK_CYCLES((mod == 3) ? 14 : 17);
return 0;
}
static int opIMUL_l_il_a16(uint32_t fetchdat)
{
int64_t temp64;
int32_t templ, templ2;
fetch_ea_16(fetchdat);
templ = geteal(); if (abrt) return 1;
templ2 = getlong(); if (abrt) return 1;
temp64 = ((int64_t)templ) * ((int64_t)templ2);
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].l = temp64 & 0xffffffff;
CLOCK_CYCLES(25);
return 0;
}
static int opIMUL_l_il_a32(uint32_t fetchdat)
{
int64_t temp64;
int32_t templ, templ2;
fetch_ea_32(fetchdat);
templ = geteal(); if (abrt) return 1;
templ2 = getlong(); if (abrt) return 1;
temp64 = ((int64_t)templ) * ((int64_t)templ2);
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].l = temp64 & 0xffffffff;
CLOCK_CYCLES(25);
return 0;
}
static int opIMUL_w_ib_a16(uint32_t fetchdat)
{
int32_t templ;
int16_t tempw, tempw2;
fetch_ea_16(fetchdat);
tempw = geteaw(); if (abrt) return 1;
tempw2 = getbyte(); if (abrt) return 1;
if (tempw2 & 0x80) tempw2 |= 0xff00;
templ = ((int)tempw) * ((int)tempw2);
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].w = templ & 0xffff;
CLOCK_CYCLES((mod == 3) ? 14 : 17);
return 0;
}
static int opIMUL_w_ib_a32(uint32_t fetchdat)
{
int32_t templ;
int16_t tempw, tempw2;
fetch_ea_32(fetchdat);
tempw = geteaw(); if (abrt) return 1;
tempw2 = getbyte(); if (abrt) return 1;
if (tempw2 & 0x80) tempw2 |= 0xff00;
templ = ((int)tempw) * ((int)tempw2);
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].w = templ & 0xffff;
CLOCK_CYCLES((mod == 3) ? 14 : 17);
return 0;
}
static int opIMUL_l_ib_a16(uint32_t fetchdat)
{
int64_t temp64;
int32_t templ, templ2;
fetch_ea_16(fetchdat);
templ = geteal(); if (abrt) return 1;
templ2 = getbyte(); if (abrt) return 1;
if (templ2 & 0x80) templ2 |= 0xffffff00;
temp64 = ((int64_t)templ)*((int64_t)templ2);
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].l = temp64 & 0xffffffff;
CLOCK_CYCLES(20);
return 0;
}
static int opIMUL_l_ib_a32(uint32_t fetchdat)
{
int64_t temp64;
int32_t templ, templ2;
fetch_ea_32(fetchdat);
templ = geteal(); if (abrt) return 1;
templ2 = getbyte(); if (abrt) return 1;
if (templ2 & 0x80) templ2 |= 0xffffff00;
temp64 = ((int64_t)templ)*((int64_t)templ2);
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
cpu_state.regs[reg].l = temp64 & 0xffffffff;
CLOCK_CYCLES(20);
return 0;
}
static int opIMUL_w_w_a16(uint32_t fetchdat)
{
int32_t templ;
fetch_ea_16(fetchdat);
templ = (int32_t)(int16_t)cpu_state.regs[reg].w * (int32_t)(int16_t)geteaw();
if (abrt) return 1;
cpu_state.regs[reg].w = templ & 0xFFFF;
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(18);
return 0;
}
static int opIMUL_w_w_a32(uint32_t fetchdat)
{
int32_t templ;
fetch_ea_32(fetchdat);
templ = (int32_t)(int16_t)cpu_state.regs[reg].w * (int32_t)(int16_t)geteaw();
if (abrt) return 1;
cpu_state.regs[reg].w = templ & 0xFFFF;
flags_rebuild();
if ((templ >> 15) != 0 && (templ >> 15) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(18);
return 0;
}
static int opIMUL_l_l_a16(uint32_t fetchdat)
{
int64_t temp64;
fetch_ea_16(fetchdat);
temp64 = (int64_t)(int32_t)cpu_state.regs[reg].l * (int64_t)(int32_t)geteal();
if (abrt) return 1;
cpu_state.regs[reg].l = temp64 & 0xFFFFFFFF;
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(30);
return 0;
}
static int opIMUL_l_l_a32(uint32_t fetchdat)
{
int64_t temp64;
fetch_ea_32(fetchdat);
temp64 = (int64_t)(int32_t)cpu_state.regs[reg].l * (int64_t)(int32_t)geteal();
if (abrt) return 1;
cpu_state.regs[reg].l = temp64 & 0xFFFFFFFF;
flags_rebuild();
if ((temp64 >> 31) != 0 && (temp64 >> 31) != -1) flags |= C_FLAG | V_FLAG;
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(30);
return 0;
}
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