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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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28
src/x86_ops_movx.h
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@ -3,6 +3,8 @@ static int opMOVZX_w_b_a16(uint32_t fetchdat)
uint8_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = (uint16_t)temp;
@ -15,6 +17,8 @@ static int opMOVZX_w_b_a32(uint32_t fetchdat)
uint8_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = (uint16_t)temp;
@ -27,6 +31,8 @@ static int opMOVZX_l_b_a16(uint32_t fetchdat)
uint8_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
@ -39,6 +45,8 @@ static int opMOVZX_l_b_a32(uint32_t fetchdat)
uint8_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
@ -51,6 +59,8 @@ static int opMOVZX_w_w_a16(uint32_t fetchdat)
uint16_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = temp;
@ -63,6 +73,8 @@ static int opMOVZX_w_w_a32(uint32_t fetchdat)
uint16_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = temp;
@ -75,6 +87,8 @@ static int opMOVZX_l_w_a16(uint32_t fetchdat)
uint16_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
@ -87,6 +101,8 @@ static int opMOVZX_l_w_a32(uint32_t fetchdat)
uint16_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
@ -100,6 +116,8 @@ static int opMOVSX_w_b_a16(uint32_t fetchdat)
uint8_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = (uint16_t)temp;
if (temp & 0x80)
@ -114,6 +132,8 @@ static int opMOVSX_w_b_a32(uint32_t fetchdat)
uint8_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].w = (uint16_t)temp;
if (temp & 0x80)
@ -128,6 +148,8 @@ static int opMOVSX_l_b_a16(uint32_t fetchdat)
uint8_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
if (temp & 0x80)
@ -142,6 +164,8 @@ static int opMOVSX_l_b_a32(uint32_t fetchdat)
uint8_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
if (temp & 0x80)
@ -156,6 +180,8 @@ static int opMOVSX_l_w_a16(uint32_t fetchdat)
uint16_t temp;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
if (temp & 0x8000)
@ -170,6 +196,8 @@ static int opMOVSX_l_w_a32(uint32_t fetchdat)
uint16_t temp;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
cpu_state.regs[cpu_reg].l = (uint32_t)temp;
if (temp & 0x8000)