valter/dosbox-staging
1
0
Fork 0
Code Releases Activity

New and faster versions of block_read and block_write

Browse source 
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@334
This commit is contained in:
Sjoerd van der Berg 2002-10-18 09:04:16 +00:00
parent 02e888e001
commit c03e0db3a4
1 changed files with 26 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

42
src/hardware/memory.cpp
View file

@ -34,28 +34,38 @@ MEMORY_WriteHandler WriteHandlerTable[MAX_PAGES];
#define MAX_PAGE_LIMIT PAGE_COUNT(C_MEM_MAX_SIZE*1024*1024)
void MEM_BlockRead(PhysPt off,void * data,Bitu size) {
Bitu c;
Bit8u * idata=(Bit8u *)data;
for (c=1;c<=(size>>2);c++) {
writed(idata,mem_readd(off));
idata+=4;off+=4;
}
for (c=1;c<=(size&3);c++) {
writeb(idata,mem_readb(off));
idata+=1;off+=1;
while (size>0) {
Bitu page=off >> PAGE_SHIFT;
Bitu start=off & (PAGE_SIZE-1);
Bitu tocopy=PAGE_SIZE-start;
if (tocopy>size) tocopy=size;
if (ReadHostTable[page]) {
memcpy(idata,ReadHostTable[page]+off,tocopy);
idata+=tocopy;
off+=tocopy;
} else {
for (;tocopy>0;tocopy--) *idata++=ReadHandlerTable[page](off++);
}
size-=tocopy;
}
}
void MEM_BlockWrite(PhysPt off,void * data,Bitu size) {
Bitu c;
Bit8u * idata=(Bit8u *)data;
for (c=1;c<=(size>>2);c++) {
mem_writed(off,readd(idata));
idata+=4;off+=4;
}
for (c=1;c<=(size&3);c++) {
mem_writeb(off,readb(idata));
idata+=1;off+=1;
while (size>0) {
Bitu page=off >> PAGE_SHIFT;
Bitu start=off & (PAGE_SIZE-1);
Bitu tocopy=PAGE_SIZE-start;
if (tocopy>size) tocopy=size;
if (WriteHostTable[page]) {
memcpy(WriteHostTable[page]+off,idata,tocopy);
idata+=tocopy;
off+=tocopy;
} else {
for (;tocopy>0;tocopy--) WriteHandlerTable[page](off++,*idata++);
}
size-=tocopy;
}
}