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Perform NULL segment checks upfront in opcode handlers, rather than on every memory access.

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This removes the need to pass the segment to readmem*l()/writemem*l().
This commit is contained in:
SarahW 2018-07-18 22:10:18 +01:00
commit 0f0a1c3223
31 changed files with 976 additions and 325 deletions
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42
src/x86_ops_mul.h
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@ -4,7 +4,9 @@ static int opIMUL_w_iw_a16(uint32_t fetchdat)
int16_t tempw, tempw2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
tempw = geteaw(); if (cpu_state.abrt) return 1;
tempw2 = getword(); if (cpu_state.abrt) return 1;
@ -24,7 +26,9 @@ static int opIMUL_w_iw_a32(uint32_t fetchdat)
int16_t tempw, tempw2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
tempw = geteaw(); if (cpu_state.abrt) return 1;
tempw2 = getword(); if (cpu_state.abrt) return 1;
@ -45,7 +49,9 @@ static int opIMUL_l_il_a16(uint32_t fetchdat)
int32_t templ, templ2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = geteal(); if (cpu_state.abrt) return 1;
templ2 = getlong(); if (cpu_state.abrt) return 1;
@ -65,7 +71,9 @@ static int opIMUL_l_il_a32(uint32_t fetchdat)
int32_t templ, templ2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = geteal(); if (cpu_state.abrt) return 1;
templ2 = getlong(); if (cpu_state.abrt) return 1;
@ -86,7 +94,9 @@ static int opIMUL_w_ib_a16(uint32_t fetchdat)
int16_t tempw, tempw2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
tempw = geteaw(); if (cpu_state.abrt) return 1;
tempw2 = getbyte(); if (cpu_state.abrt) return 1;
if (tempw2 & 0x80) tempw2 |= 0xff00;
@ -107,7 +117,9 @@ static int opIMUL_w_ib_a32(uint32_t fetchdat)
int16_t tempw, tempw2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
tempw = geteaw(); if (cpu_state.abrt) return 1;
tempw2 = getbyte(); if (cpu_state.abrt) return 1;
if (tempw2 & 0x80) tempw2 |= 0xff00;
@ -129,6 +141,9 @@ static int opIMUL_l_ib_a16(uint32_t fetchdat)
int32_t templ, templ2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = geteal(); if (cpu_state.abrt) return 1;
templ2 = getbyte(); if (cpu_state.abrt) return 1;
if (templ2 & 0x80) templ2 |= 0xffffff00;
@ -149,6 +164,9 @@ static int opIMUL_l_ib_a32(uint32_t fetchdat)
int32_t templ, templ2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = geteal(); if (cpu_state.abrt) return 1;
templ2 = getbyte(); if (cpu_state.abrt) return 1;
if (templ2 & 0x80) templ2 |= 0xffffff00;
@ -171,6 +189,9 @@ static int opIMUL_w_w_a16(uint32_t fetchdat)
int32_t templ;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = (int32_t)(int16_t)cpu_state.regs[cpu_reg].w * (int32_t)(int16_t)geteaw();
if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = templ & 0xFFFF;
@ -187,6 +208,9 @@ static int opIMUL_w_w_a32(uint32_t fetchdat)
int32_t templ;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
templ = (int32_t)(int16_t)cpu_state.regs[cpu_reg].w * (int32_t)(int16_t)geteaw();
if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = templ & 0xFFFF;
@ -204,6 +228,9 @@ static int opIMUL_l_l_a16(uint32_t fetchdat)
int64_t temp64;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp64 = (int64_t)(int32_t)cpu_state.regs[cpu_reg].l * (int64_t)(int32_t)geteal();
if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = temp64 & 0xFFFFFFFF;
@ -220,6 +247,9 @@ static int opIMUL_l_l_a32(uint32_t fetchdat)
int64_t temp64;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp64 = (int64_t)(int32_t)cpu_state.regs[cpu_reg].l * (int64_t)(int32_t)geteal();
if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = temp64 & 0xFFFFFFFF;