Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

39
src/x86_ops_misc.h
View file

@ -54,6 +54,7 @@ static int opF6_a16(uint32_t fetchdat)
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
{
SEG_CHECK_READ(cpu_state.ea_seg);
CHECK_READ(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr);
}
dst = geteab(); if (cpu_state.abrt) return 1;
@ -68,11 +69,15 @@ static int opF6_a16(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 3, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x10: /*NOT b*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteab(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x18: /*NEG b*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteab(0 - dst); if (cpu_state.abrt) return 1;
setsub8(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
@ -156,6 +161,8 @@ static int opF6_a32(uint32_t fetchdat)
int8_t temps;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
dst = geteab(); if (cpu_state.abrt) return 1;
switch (rmdat & 0x38)
{
@ -168,11 +175,15 @@ static int opF6_a32(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 3, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x10: /*NOT b*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteab(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x18: /*NEG b*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteab(0 - dst); if (cpu_state.abrt) return 1;
setsub8(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
@ -259,6 +270,8 @@ static int opF7_w_a16(uint32_t fetchdat)
uint16_t src, dst;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
dst = geteaw(); if (cpu_state.abrt) return 1;
switch (rmdat & 0x38)
{
@ -271,11 +284,15 @@ static int opF7_w_a16(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 4, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x10: /*NOT w*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteaw(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x18: /*NEG w*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteaw(0 - dst); if (cpu_state.abrt) return 1;
setsub16(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
@ -353,6 +370,8 @@ static int opF7_w_a32(uint32_t fetchdat)
uint16_t src, dst;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
dst = geteaw(); if (cpu_state.abrt) return 1;
switch (rmdat & 0x38)
{
@ -365,11 +384,15 @@ static int opF7_w_a32(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 4, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x10: /*NOT w*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteaw(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x18: /*NEG w*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteaw(0 - dst); if (cpu_state.abrt) return 1;
setsub16(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
@ -446,6 +469,8 @@ static int opF7_l_a16(uint32_t fetchdat)
uint32_t src, dst;
fetch_ea_16(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
dst = geteal(); if (cpu_state.abrt) return 1;
switch (rmdat & 0x38)
@ -459,11 +484,15 @@ static int opF7_l_a16(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 5, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
case 0x10: /*NOT l*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteal(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 0);
break;
case 0x18: /*NEG l*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteal(0 - dst); if (cpu_state.abrt) return 1;
setsub32(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
@ -516,6 +545,8 @@ static int opF7_l_a32(uint32_t fetchdat)
uint32_t src, dst;
fetch_ea_32(fetchdat);
if (cpu_mod != 3)
SEG_CHECK_READ(cpu_state.ea_seg);
dst = geteal(); if (cpu_state.abrt) return 1;
switch (rmdat & 0x38)
@ -529,11 +560,15 @@ static int opF7_l_a32(uint32_t fetchdat)
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 5, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
case 0x10: /*NOT l*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteal(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 1);
break;
case 0x18: /*NEG l*/
if (cpu_mod != 3)
SEG_CHECK_WRITE(cpu_state.ea_seg);
seteal(0 - dst); if (cpu_state.abrt) return 1;
setsub32(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
@ -625,6 +660,7 @@ static int opBOUND_w_a16(uint32_t fetchdat)
fetch_ea_16(fetchdat);
ILLEGAL_ON(cpu_mod == 3);
SEG_CHECK_READ(cpu_state.ea_seg);
low = geteaw();
high = readmemw(easeg, cpu_state.eaaddr + 2); if (cpu_state.abrt) return 1;
@ -644,6 +680,7 @@ static int opBOUND_w_a32(uint32_t fetchdat)
fetch_ea_32(fetchdat);
ILLEGAL_ON(cpu_mod == 3);
SEG_CHECK_READ(cpu_state.ea_seg);
low = geteaw();
high = readmemw(easeg, cpu_state.eaaddr + 2); if (cpu_state.abrt) return 1;
@ -664,6 +701,7 @@ static int opBOUND_l_a16(uint32_t fetchdat)
fetch_ea_16(fetchdat);
ILLEGAL_ON(cpu_mod == 3);
SEG_CHECK_READ(cpu_state.ea_seg);
low = geteal();
high = readmeml(easeg, cpu_state.eaaddr + 4); if (cpu_state.abrt) return 1;
@ -683,6 +721,7 @@ static int opBOUND_l_a32(uint32_t fetchdat)
fetch_ea_32(fetchdat);
ILLEGAL_ON(cpu_mod == 3);
SEG_CHECK_READ(cpu_state.ea_seg);
low = geteal();
high = readmeml(easeg, cpu_state.eaaddr + 4); if (cpu_state.abrt) return 1;