Optimize endian routines when we know the endian at compile time.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5830 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2021-05-09 13:00:00 +00:00
parent 134de2cfb2
commit 2cf2247b84
6 changed files with 89 additions and 58 deletions

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@ -8,13 +8,7 @@
#ifndef HAVE_CLIENT #ifndef HAVE_CLIENT
//#define Con_Printf(f, ...) //#define Con_Printf(f, ...)
//hope you're on a littleendian machine float FloatSwap (float l)
#define LittleShort(s) s
#define LittleLong(s) s
#define LittleFloat(s) s
#define BigFloat(s) SwapFloat(s)
static float SwapFloat (float l)
{ {
union {qbyte b[4]; float f;} in, out; union {qbyte b[4]; float f;} in, out;
in.f = l; in.f = l;

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@ -693,6 +693,21 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#endif #endif
#endif #endif
#if defined(_WIN32)
#define FTE_LITTLE_ENDIAN
#elif defined(__BYTE_ORDER__)
#ifdef __ORDER_BIG_ENDIAN__
#if (__BYTE_ORDER__==__ORDER_BIG_ENDIAN__) && (__FLOAT_WORD_ORDER__==__ORDER_BIG_ENDIAN__)
#define FTE_BIG_ENDIAN
#endif
#endif
#ifdef __ORDER_LITTLE_ENDIAN__
#if (__BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__) && (__FLOAT_WORD_ORDER__==__ORDER_LITTLE_ENDIAN__)
#define FTE_LITTLE_ENDIAN
#endif
#endif
#endif
#ifdef _MSC_VER #ifdef _MSC_VER
#define VARGS __cdecl #define VARGS __cdecl
#define MSVCDISABLEWARNINGS #define MSVCDISABLEWARNINGS

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@ -745,6 +745,7 @@ void deleetstring(char *result, const char *leet)
============================================================================ ============================================================================
*/ */
#if !defined(FTE_BIG_ENDIAN) && !defined(FTE_LITTLE_ENDIAN)
qboolean bigendian; qboolean bigendian;
short (*BigShort) (short l); short (*BigShort) (short l);
@ -754,39 +755,36 @@ int (*LittleLong) (int l);
float (*BigFloat) (float l); float (*BigFloat) (float l);
float (*LittleFloat) (float l); float (*LittleFloat) (float l);
static short ShortNoSwap (short l) { return l; }
static int LongNoSwap (int l) { return l; }
static qint64_t I64NoSwap (qint64_t l) { return l; }
static float FloatNoSwap (float f) { return f; }
#endif
short ShortSwap (short l) short ShortSwap (short l)
{ {
qbyte b1,b2; return ((l>> 8)&0x00ff)|
((l<< 8)&0xff00);
b1 = l&255;
b2 = (l>>8)&255;
return (b1<<8) + b2;
} }
static short ShortNoSwap (short l)
{
return l;
}
int LongSwap (int l) int LongSwap (int l)
{ {
qbyte b1,b2,b3,b4; return ((l>>24)&0x000000ff)|
((l>> 8)&0x0000ff00)|
b1 = l&255; ((l<< 8)&0x00ff0000)|
b2 = (l>>8)&255; ((l<<24)&0xff000000);
b3 = (l>>16)&255;
b4 = (l>>24)&255;
return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
} }
qint64_t I64Swap (qint64_t l)
static int LongNoSwap (int l)
{ {
return l; return ((l>>56)& 0x000000ff)|
((l>>40)& 0x0000ff00)|
((l>>24)& 0x00ff0000)|
((l>> 8)& 0xff000000)|
((l<< 8)&0x000000ff00000000)|
((l<<24)&0x0000ff0000000000)|
((l<<40)&0x00ff000000000000)|
((l<<56)&0xff00000000000000);
} }
float FloatSwap (float f)
static float FloatSwap (float f)
{ {
union union
{ {
@ -803,11 +801,6 @@ static float FloatSwap (float f)
return dat2.f; return dat2.f;
} }
static float FloatNoSwap (float f)
{
return f;
}
void COM_SwapLittleShortBlock (short *s, int size) void COM_SwapLittleShortBlock (short *s, int size)
{ {
if (size <= 0) if (size <= 0)
@ -6212,11 +6205,9 @@ COM_Init
*/ */
void COM_Init (void) void COM_Init (void)
{ {
qbyte swaptest[2] = {1,0}; #if !defined(FTE_BIG_ENDIAN) && !defined(FTE_LITTLE_ENDIAN)
wantquit = false;
// set the qbyte swapping variables in a portable manner // set the qbyte swapping variables in a portable manner
qbyte swaptest[2] = {1,0};
if ( *(short *)swaptest == 1) if ( *(short *)swaptest == 1)
{ {
bigendian = false; bigendian = false;
@ -6237,6 +6228,9 @@ void COM_Init (void)
BigFloat = FloatNoSwap; BigFloat = FloatNoSwap;
LittleFloat = FloatSwap; LittleFloat = FloatSwap;
} }
#endif
wantquit = false;
//random should be random from the start... //random should be random from the start...
srand(time(0)); srand(time(0));

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@ -232,27 +232,57 @@ void InsertLinkAfter (link_t *l, link_t *after);
#define Q_MAXSHORT ((short)0x7fff) #define Q_MAXSHORT ((short)0x7fff)
#define Q_MAXINT ((int)0x7fffffff) #define Q_MAXINT ((int)0x7fffffff)
#define Q_MAXLONG ((int)0x7fffffff) #define Q_MAXLONG ((int)0x7fffffff)
#define Q_MAXFLOAT ((int)0x7fffffff) //#define Q_MAXFLOAT ((int)0x7fffffff)
#define Q_MINCHAR ((char)0x80) #define Q_MINCHAR ((char)0x80)
#define Q_MINSHORT ((short)0x8000) #define Q_MINSHORT ((short)0x8000)
#define Q_MININT ((int)0x80000000) #define Q_MININT ((int)0x80000000)
#define Q_MINLONG ((int)0x80000000) #define Q_MINLONG ((int)0x80000000)
#define Q_MINFLOAT ((int)0x7fffffff) //#define Q_MINFLOAT ((int)0x7fffffff)
//============================================================================ //============================================================================
extern qboolean bigendian; #if defined(FTE_LITTLE_ENDIAN)
#define bigendian false
extern short (*BigShort) (short l); #define LittleShort(x) ((short)(x))
extern short (*LittleShort) (short l); #define LittleLong(x) ((int)(x))
extern int (*BigLong) (int l); #define LittleI64(x) ((qint64_t)(x))
extern int (*LittleLong) (int l); #define LittleFloat(x) ((float)(x))
extern float (*BigFloat) (float l);
extern float (*LittleFloat) (float l); #define BigShort(x) (ShortSwap(x))
#define BigLong(x) (LongSwap(x))
#define BigI64(x) (I64Swap(x))
#define BigFloat(x) (FloatSwap(x))
#elif defined(FTE_BIG_ENDIAN)
#define bigendian true
#define BigShort(x) ((short)(x))
#define BigLong(x) ((int)(x))
#define BigI64(x) ((qint64_t)(x))
#define BigFloat(x) ((float)(x))
#define LittleShort(x) (ShortSwap(x))
#define LittleLong(x) (LongSwap(x))
#define LittleI64(x) (I64Swap(x))
#define LittleFloat(x) (FloatSwap(x))
#else
extern qboolean bigendian;
extern short (*BigShort) (short l);
extern short (*LittleShort) (short l);
extern int (*BigLong) (int l);
extern int (*LittleLong) (int l);
extern qint64_t (*BigI64) (qint64_t l);
extern qint64_t (*LittleI64) (qint64_t l);
extern float (*BigFloat) (float l);
extern float (*LittleFloat) (float l);
#endif
short ShortSwap (short l); short ShortSwap (short l);
int LongSwap (int l); int LongSwap (int l);
qint64_t I64Swap (qint64_t l);
float FloatSwap (float f);
void COM_CharBias (signed char *c, int size); void COM_CharBias (signed char *c, int size);
void COM_SwapLittleShortBlock (short *s, int size); void COM_SwapLittleShortBlock (short *s, int size);

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@ -28,12 +28,12 @@ typedef struct
} SHA1_CTX; } SHA1_CTX;
#define SHA1_DIGEST_SIZE 20 #define SHA1_DIGEST_SIZE 20
#define BigLong(l) (((unsigned char*)&l)[0]<<24) | (((unsigned char*)&l)[1]<<16) | (((unsigned char*)&l)[2]<<8) | (((unsigned char*)&l)[3]<<0) #define ShaBigLong(l) (((unsigned char*)&l)[0]<<24) | (((unsigned char*)&l)[1]<<16) | (((unsigned char*)&l)[2]<<8) | (((unsigned char*)&l)[3]<<0)
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
#define blk0(i) (block->l[i] = BigLong(block->l[i])) #define blk0(i) (block->l[i] = ShaBigLong(block->l[i]))
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \ #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
^block->l[(i+2)&15]^block->l[i&15],1)) ^block->l[(i+2)&15]^block->l[i&15],1))

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@ -3,8 +3,6 @@
#undef stderr #undef stderr
#define stderr stdout #define stderr stdout
#define LittleLong(s) s
#include <limits.h> #include <limits.h>
#include <ctype.h> #include <ctype.h>
#ifdef _WIN32 #ifdef _WIN32