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

Added some functions for acessing values in an endian safe way.

Browse source 
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@1033
This commit is contained in:
Sjoerd van der Berg 2003-06-02 21:08:31 +00:00
parent 9b64906560
commit 81e9ba2cdf
1 changed files with 19 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
include/mem.h
View file

@ -79,16 +79,20 @@ INLINE void writeb(HostPt off,Bit8u val) {
off[0]=val;
};
INLINE void writew(HostPt off,Bit16u val) {
off[0]=(Bit8u)((val & 0x00ff));
off[1]=(Bit8u)((val & 0xff00) >> 8);
off[0]=(Bit8u)(val);
off[1]=(Bit8u)(val >> 8);
};
INLINE void writed(HostPt off,Bit32u val) {
off[0]=(Bit8u)((val & 0x000000ff));
off[1]=(Bit8u)((val & 0x0000ff00) >> 8);
off[2]=(Bit8u)((val & 0x00ff0000) >> 16);
off[3]=(Bit8u)((val & 0xff000000) >> 24);
off[0]=(Bit8u)(val);
off[1]=(Bit8u)(val >> 8);
off[2]=(Bit8u)(val >> 16);
off[3]=(Bit8u)(val >> 24);
};
#define MLEB(_MLE_VAL_) (_MLE_VAL_)
#define MLEW(_MLE_VAL_) (_MLE_VAL_ >> 8) | (_MLE_VAL_ << 8))
#define MLED(_MLE_VAL_) (_MLE_VAL_ >> 24)|((_MLE_VAL_ >> 8)&0xFF00)|((_MLE_VAL_ << 8)&0xFF0000)|((_MLE_VAL_ << 24)&0xFF000000))
#else
INLINE Bit8u readb(HostPt off) {
@ -110,8 +114,17 @@ INLINE void writed(HostPt off,Bit32u val) {
*(Bit32u *)(off)=val;
};
#define MLEB(_MLE_VAL_) (_MLE_VAL_)
#define MLEW(_MLE_VAL_) (_MLE_VAL_)
#define MLED(_MLE_VAL_) (_MLE_VAL_)
#endif
#define WLE(VAR_,VAL_) \
if (sizeof(VAR_)==1) VAR_=MLEB(VAL_); \
if (sizeof(VAR_)==2) VAR_=MLEW(VAL_); \
if (sizeof(VAR_)==4) VAR_=MLED(VAL_);
/* The Folowing six functions are slower but they recognize the paged memory system */
//TODO maybe make em inline to go a bit faster