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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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44
src/x86_ops_shift.h
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@ -281,6 +281,8 @@ static int opC0_a16(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteab(); if (cpu_state.abrt) return 1;
@ -294,6 +296,8 @@ static int opC0_a32(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteab(); if (cpu_state.abrt) return 1;
@ -307,6 +311,8 @@ static int opC1_w_a16(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteaw(); if (cpu_state.abrt) return 1;
@ -320,6 +326,8 @@ static int opC1_w_a32(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteaw(); if (cpu_state.abrt) return 1;
@ -333,6 +341,8 @@ static int opC1_l_a16(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteal(); if (cpu_state.abrt) return 1;
@ -346,6 +356,8 @@ static int opC1_l_a32(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = readmemb(cs, cpu_state.pc) & 31; cpu_state.pc++;
PREFETCH_PREFIX();
temp = geteal(); if (cpu_state.abrt) return 1;
@ -360,6 +372,8 @@ static int opD0_a16(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
OP_SHIFT_b(c, 0);
return 0;
@ -371,6 +385,8 @@ static int opD0_a32(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteab(); if (cpu_state.abrt) return 1;
OP_SHIFT_b(c, 1);
return 0;
@ -382,6 +398,8 @@ static int opD1_w_a16(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
OP_SHIFT_w(c, 0);
return 0;
@ -393,6 +411,8 @@ static int opD1_w_a32(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteaw(); if (cpu_state.abrt) return 1;
OP_SHIFT_w(c, 1);
return 0;
@ -404,6 +424,8 @@ static int opD1_l_a16(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteal(); if (cpu_state.abrt) return 1;
OP_SHIFT_l(c, 0);
return 0;
@ -415,6 +437,8 @@ static int opD1_l_a32(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
temp = geteal(); if (cpu_state.abrt) return 1;
OP_SHIFT_l(c, 1);
return 0;
@ -427,6 +451,8 @@ static int opD2_a16(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteab(); if (cpu_state.abrt) return 1;
OP_SHIFT_b(c, 0);
@ -439,6 +465,8 @@ static int opD2_a32(uint32_t fetchdat)
uint8_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteab(); if (cpu_state.abrt) return 1;
OP_SHIFT_b(c, 1);
@ -451,6 +479,8 @@ static int opD3_w_a16(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteaw(); if (cpu_state.abrt) return 1;
OP_SHIFT_w(c, 0);
@ -463,6 +493,8 @@ static int opD3_w_a32(uint32_t fetchdat)
uint16_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteaw(); if (cpu_state.abrt) return 1;
OP_SHIFT_w(c, 1);
@ -475,6 +507,8 @@ static int opD3_l_a16(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteal(); if (cpu_state.abrt) return 1;
OP_SHIFT_l(c, 0);
@ -487,6 +521,8 @@ static int opD3_l_a32(uint32_t fetchdat)
uint32_t temp, temp2;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
c = CL & 31;
temp = geteal(); if (cpu_state.abrt) return 1;
OP_SHIFT_l(c, 1);
@ -552,6 +588,8 @@ static int opD3_l_a32(uint32_t fetchdat)
int count; \
\
fetch_ea_16(fetchdat); \
if (cpu_mod != 3) \
SEG_CHECK_WRITE(cpu_state.ea_seg); \
count = getbyte() & 31; \
operation(); \
\
@ -564,6 +602,8 @@ static int opD3_l_a32(uint32_t fetchdat)
int count; \
\
fetch_ea_16(fetchdat); \
if (cpu_mod != 3) \
SEG_CHECK_WRITE(cpu_state.ea_seg); \
count = CL & 31; \
operation(); \
\
@ -576,6 +616,8 @@ static int opD3_l_a32(uint32_t fetchdat)
int count; \
\
fetch_ea_32(fetchdat); \
if (cpu_mod != 3) \
SEG_CHECK_WRITE(cpu_state.ea_seg); \
count = getbyte() & 31; \
operation(); \
\
@ -588,6 +630,8 @@ static int opD3_l_a32(uint32_t fetchdat)
int count; \
\
fetch_ea_32(fetchdat); \
if (cpu_mod != 3) \
SEG_CHECK_WRITE(cpu_state.ea_seg); \
count = CL & 31; \
operation(); \
\