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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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20
src/ibm.h
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@ -31,8 +31,8 @@ int writelnext;
extern int mmu_perm;
#define readmemb(a) ((readlookup2[(a)>>12]==-1)?readmembl(a):*(uint8_t *)(readlookup2[(a) >> 12] + (a)))
#define readmemw(s,a) ((readlookup2[(uint32_t)((s)+(a))>>12]==-1 || (s)==0xFFFFFFFF || (((s)+(a)) & 1))?readmemwl(s,a):*(uint16_t *)(readlookup2[(uint32_t)((s)+(a))>>12]+(uint32_t)((s)+(a))))
#define readmeml(s,a) ((readlookup2[(uint32_t)((s)+(a))>>12]==-1 || (s)==0xFFFFFFFF || (((s)+(a)) & 3))?readmemll(s,a):*(uint32_t *)(readlookup2[(uint32_t)((s)+(a))>>12]+(uint32_t)((s)+(a))))
#define readmemw(s,a) ((readlookup2[(uint32_t)((s)+(a))>>12]==-1 || (((s)+(a)) & 1))?readmemwl((s)+(a)):*(uint16_t *)(readlookup2[(uint32_t)((s)+(a))>>12]+(uint32_t)((s)+(a))))
#define readmeml(s,a) ((readlookup2[(uint32_t)((s)+(a))>>12]==-1 || (((s)+(a)) & 3))?readmemll((s)+(a)):*(uint32_t *)(readlookup2[(uint32_t)((s)+(a))>>12]+(uint32_t)((s)+(a))))
//#define writememb(a,v) if (writelookup2[(a)>>12]==0xFFFFFFFF) writemembl(a,v); else ram[writelookup2[(a)>>12]+((a)&0xFFF)]=v
//#define writememw(s,a,v) if (writelookup2[((s)+(a))>>12]==0xFFFFFFFF || (s)==0xFFFFFFFF) writememwl(s,a,v); else *((uint16_t *)(&ram[writelookup2[((s)+(a))>>12]+(((s)+(a))&0xFFF)]))=v
@ -43,14 +43,14 @@ extern int mmu_perm;
//void writememb(uint32_t addr, uint8_t val);
uint8_t readmembl(uint32_t addr);
void writemembl(uint32_t addr, uint8_t val);
uint8_t readmemb386l(uint32_t seg, uint32_t addr);
void writememb386l(uint32_t seg, uint32_t addr, uint8_t val);
uint16_t readmemwl(uint32_t seg, uint32_t addr);
void writememwl(uint32_t seg, uint32_t addr, uint16_t val);
uint32_t readmemll(uint32_t seg, uint32_t addr);
void writememll(uint32_t seg, uint32_t addr, uint32_t val);
uint64_t readmemql(uint32_t seg, uint32_t addr);
void writememql(uint32_t seg, uint32_t addr, uint64_t val);
uint8_t readmemb386l(uint32_t addr);
void writememb386l(uint32_t addr, uint8_t val);
uint16_t readmemwl(uint32_t addr);
void writememwl(uint32_t addr, uint16_t val);
uint32_t readmemll(uint32_t addr);
void writememll(uint32_t addr, uint32_t val);
uint64_t readmemql(uint32_t addr);
void writememql(uint32_t addr, uint64_t val);
uint8_t *getpccache(uint32_t a);