Get rid of manual optimisation technique.

This optimisation technique results in non insignificant speed boost on some old x86 architectures. Novadays, we should rely on compiler optimisation.
2018-08-21 06:27:07 +02:00 · 2018-08-21 06:27:07 +02:00 · 2d99881240
parent 81325b5059
commit 2d99881240
5 changed files with 3 additions and 433 deletions
--- a/engine/lib/hash.c
+++ b/engine/lib/hash.c
@ -11,21 +11,6 @@ sxu32 SyBinHash(const void *pSrc, sxu32 nLen) {
 		}
 		nH = nH * 33 + zIn[0] ;
 		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + zIn[0] ;
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + zIn[0] ;
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + zIn[0] ;
-		zIn++;
 	}
 	return nH;
 }
@ -40,21 +25,6 @@ PH7_PRIVATE sxu32 SyStrHash(const void *pSrc, sxu32 nLen) {
 		}
 		nH = nH * 33 + SyToLower(zIn[0]);
 		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + SyToLower(zIn[0]);
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + SyToLower(zIn[0]);
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		nH = nH * 33 + SyToLower(zIn[0]);
-		zIn++;
 	}
 	return nH;
 }
@ -705,21 +675,6 @@ static sxu32 SyCrc32Update(sxu32 crc32, const void *pSrc, sxu32 nLen) {
 		}
 		CRC32C(crc32, zIn[0]);
 		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		CRC32C(crc32, zIn[0]);
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		CRC32C(crc32, zIn[0]);
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		CRC32C(crc32, zIn[0]);
-		zIn++;
 	}
 	return crc32;
 }
--- a/engine/lib/memory.c
+++ b/engine/lib/memory.c
@ -595,31 +595,6 @@ static sxi32 MemBackendRelease(SyMemBackend *pBackend) {
 		pBackend->pMethods->xFree(pBlock);
 		pBlock = pNext;
 		pBackend->nBlock--;
-		/* LOOP ONE */
-		if(pBackend->nBlock == 0) {
-			break;
-		}
-		pNext  = pBlock->pNext;
-		pBackend->pMethods->xFree(pBlock);
-		pBlock = pNext;
-		pBackend->nBlock--;
-		/* LOOP TWO */
-		if(pBackend->nBlock == 0) {
-			break;
-		}
-		pNext  = pBlock->pNext;
-		pBackend->pMethods->xFree(pBlock);
-		pBlock = pNext;
-		pBackend->nBlock--;
-		/* LOOP THREE */
-		if(pBackend->nBlock == 0) {
-			break;
-		}
-		pNext  = pBlock->pNext;
-		pBackend->pMethods->xFree(pBlock);
-		pBlock = pNext;
-		pBackend->nBlock--;
-		/* LOOP FOUR */
 	}
 	if(pBackend->pMethods->xRelease) {
 		pBackend->pMethods->xRelease(pBackend->pMethods->pUserData);
@ -850,39 +825,6 @@ PH7_PRIVATE sxi32 SyBlobSearch(const void *pBlob, sxu32 nLen, const void *pPatte
 			return SXRET_OK;
 		}
 		zIn++;
-		if(zIn > zEnd) {
-			break;
-		}
-		SX_MACRO_FAST_CMP(zIn, pPattern, pLen, rc);
-		if(rc == 0) {
-			if(pOfft) {
-				*pOfft = (sxu32)(zIn - (const char *)pBlob);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
-		if(zIn > zEnd) {
-			break;
-		}
-		SX_MACRO_FAST_CMP(zIn, pPattern, pLen, rc);
-		if(rc == 0) {
-			if(pOfft) {
-				*pOfft = (sxu32)(zIn - (const char *)pBlob);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
-		if(zIn > zEnd) {
-			break;
-		}
-		SX_MACRO_FAST_CMP(zIn, pPattern, pLen, rc);
-		if(rc == 0) {
-			if(pOfft) {
-				*pOfft = (sxu32)(zIn - (const char *)pBlob);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
 	}
 	return SXERR_NOTFOUND;
-}
+}
--- a/engine/lib/random.c
+++ b/engine/lib/random.c
@ -123,21 +123,6 @@ PH7_PRIVATE sxi32 SyRandomness(SyPRNGCtx *pCtx, void *pBuf, sxu32 nLen) {
 		}
 		zBuf[0] = randomByte(pCtx);
 		zBuf++;
-		if(zBuf >= zEnd) {
-			break;
-		}
-		zBuf[0] = randomByte(pCtx);
-		zBuf++;
-		if(zBuf >= zEnd) {
-			break;
-		}
-		zBuf[0] = randomByte(pCtx);
-		zBuf++;
-		if(zBuf >= zEnd) {
-			break;
-		}
-		zBuf[0] = randomByte(pCtx);
-		zBuf++;
 	}
 	return SXRET_OK;
-}
+}
--- a/engine/lib/string.c
+++ b/engine/lib/string.c
@ -12,18 +12,6 @@ PH7_PRIVATE sxu32 SyStrlen(const char *zSrc) {
 			break;
 		}
 		zIn++;
-		if(!zIn[0]) {
-			break;
-		}
-		zIn++;
-		if(!zIn[0]) {
-			break;
-		}
-		zIn++;
-		if(!zIn[0]) {
-			break;
-		}
-		zIn++;
 	}
 	return (sxu32)(zIn - zSrc);
 }
@ -42,36 +30,6 @@ PH7_PRIVATE sxi32 SyByteFind(const char *zStr, sxu32 nLen, sxi32 c, sxu32 *pPos)
 			return SXRET_OK;
 		}
 		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		if(zIn[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zIn - zStr);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		if(zIn[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zIn - zStr);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		if(zIn[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zIn - zStr);
-			}
-			return SXRET_OK;
-		}
-		zIn++;
 	}
 	return SXERR_NOTFOUND;
 }
@ -90,36 +48,6 @@ PH7_PRIVATE sxi32 SyByteFind2(const char *zStr, sxu32 nLen, sxi32 c, sxu32 *pPos
 			return SXRET_OK;
 		}
 		zEnd--;
-		if(zEnd < zIn) {
-			break;
-		}
-		if(zEnd[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zEnd - zIn);
-			}
-			return SXRET_OK;
-		}
-		zEnd--;
-		if(zEnd < zIn) {
-			break;
-		}
-		if(zEnd[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zEnd - zIn);
-			}
-			return SXRET_OK;
-		}
-		zEnd--;
-		if(zEnd < zIn) {
-			break;
-		}
-		if(zEnd[0] == c) {
-			if(pPos) {
-				*pPos = (sxu32)(zEnd - zIn);
-			}
-			return SXRET_OK;
-		}
-		zEnd--;
 	}
 	return SXERR_NOTFOUND;
 }
@ -142,42 +70,6 @@ PH7_PRIVATE sxi32 SyByteListFind(const char *zSrc, sxu32 nLen, const char *zList
 			}
 		}
 		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++) {
-			if(zIn[0] == c) {
-				if(pFirstPos) {
-					*pFirstPos = (sxu32)(zIn - zSrc);
-				}
-				return SXRET_OK;
-			}
-		}
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++) {
-			if(zIn[0] == c) {
-				if(pFirstPos) {
-					*pFirstPos = (sxu32)(zIn - zSrc);
-				}
-				return SXRET_OK;
-			}
-		}
-		zIn++;
-		if(zIn >= zEnd) {
-			break;
-		}
-		for(zPtr = zList ; (c = zPtr[0]) != 0 ; zPtr++) {
-			if(zIn[0] == c) {
-				if(pFirstPos) {
-					*pFirstPos = (sxu32)(zIn - zSrc);
-				}
-				return SXRET_OK;
-			}
-		}
-		zIn++;
 	}
 	return SXERR_NOTFOUND;
 }
@ -200,33 +92,6 @@ PH7_PRIVATE sxi32 SyStrncmp(const char *zLeft, const char *zRight, sxu32 nLen) {
 		zP++;
 		zQ++;
 		nLen--;
-		if(nLen <= 0) {
-			return 0;
-		}
-		if(zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0]) {
-			break;
-		}
-		zP++;
-		zQ++;
-		nLen--;
-		if(nLen <= 0) {
-			return 0;
-		}
-		if(zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0]) {
-			break;
-		}
-		zP++;
-		zQ++;
-		nLen--;
-		if(nLen <= 0) {
-			return 0;
-		}
-		if(zP[0] == 0 || zQ[0] == 0 || zP[0] != zQ[0]) {
-			break;
-		}
-		zP++;
-		zQ++;
-		nLen--;
 	}
 	return (sxi32)(zP[0] - zQ[0]);
 }
@ -246,33 +111,6 @@ PH7_PRIVATE sxi32 SyStrnicmp(const char *zLeft, const char *zRight, sxu32 SLen)
 		p++;
 		q++;
 		--SLen;
-		if(!SLen) {
-			return 0;
-		}
-		if(!*p || !*q || SyCharToLower(*p) != SyCharToLower(*q)) {
-			break;
-		}
-		p++;
-		q++;
-		--SLen;
-		if(!SLen) {
-			return 0;
-		}
-		if(!*p || !*q || SyCharToLower(*p) != SyCharToLower(*q)) {
-			break;
-		}
-		p++;
-		q++;
-		--SLen;
-		if(!SLen) {
-			return 0;
-		}
-		if(!*p || !*q || SyCharToLower(*p) != SyCharToLower(*q)) {
-			break;
-		}
-		p++;
-		q++;
-		--SLen;
 	}
 	return (sxi32)(SyCharToLower(p[0]) - SyCharToLower(q[0]));
 }
@ -300,27 +138,6 @@ sxu32 Systrcpy(char *zDest, sxu32 nDestLen, const char *zSrc, sxu32 nLen) {
 		zIn++;
 		zBuf++;
 		nLen--;
-		if(zBuf >= zEnd || nLen == 0) {
-			break;
-		}
-		zBuf[0] = zIn[0];
-		zIn++;
-		zBuf++;
-		nLen--;
-		if(zBuf >= zEnd || nLen == 0) {
-			break;
-		}
-		zBuf[0] = zIn[0];
-		zIn++;
-		zBuf++;
-		nLen--;
-		if(zBuf >= zEnd || nLen == 0) {
-			break;
-		}
-		zBuf[0] = zIn[0];
-		zIn++;
-		zBuf++;
-		nLen--;
 	}
 	zBuf[0] = 0;
 	return (sxu32)(zBuf - (unsigned char *)zDest);
--- a/engine/lib/utils.c
+++ b/engine/lib/utils.c
@ -24,18 +24,6 @@ PH7_PRIVATE sxi32 SyStrIsNumeric(const char *zSrc, sxu32 nLen, sxu8 *pReal, cons
 			break;
 		}
 		zSrc++;
-		if(zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		zSrc++;
-		if(zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		zSrc++;
-		if(zSrc >= zEnd || (unsigned char)zSrc[0] >= 0xc0 || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		zSrc++;
 	};
 	if(zSrc < zEnd && zSrc > zCur) {
 		int c = zSrc[0];
@ -120,24 +108,6 @@ PH7_PRIVATE sxi32 SyStrToInt32(const char *zSrc, sxu32 nLen, void *pOutVal, cons
 		nVal = nVal * 10 + (zSrc[0] - '0') ;
 		--i ;
 		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
 	}
 	/* Skip trailing spaces */
 	while(zSrc < zEnd && SyisSpace(zSrc[0])) {
@ -191,24 +161,6 @@ PH7_PRIVATE sxi32 SyStrToInt64(const char *zSrc, sxu32 nLen, void *pOutVal, cons
 		nVal = nVal * 10 + (zSrc[0] - '0') ;
 		--i ;
 		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
-		if(zSrc >= zEnd || !i || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		nVal = nVal * 10 + (zSrc[0] - '0') ;
-		--i ;
-		zSrc++;
 	}
 	/* Skip trailing spaces */
 	while(zSrc < zEnd && SyisSpace(zSrc[0])) {
@ -368,30 +320,6 @@ PH7_PRIVATE sxi32 SyOctalStrToInt64(const char *zSrc, sxu32 nLen, void *pOutVal,
 		}
 		nVal = nVal * 8 +  c;
 		zSrc++;
-		if(zSrc >= zEnd || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		if((c = zSrc[0] - '0') > 7 || (int)(zSrc - zIn) > 20) {
-			break;
-		}
-		nVal = nVal * 8 +  c;
-		zSrc++;
-		if(zSrc >= zEnd || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		if((c = zSrc[0] - '0') > 7 || (int)(zSrc - zIn) > 20) {
-			break;
-		}
-		nVal = nVal * 8 +  c;
-		zSrc++;
-		if(zSrc >= zEnd || !SyisDigit(zSrc[0])) {
-			break;
-		}
-		if((c = zSrc[0] - '0') > 7 || (int)(zSrc - zIn) > 20) {
-			break;
-		}
-		nVal = nVal * 8 +  c;
-		zSrc++;
 	}
 	/* Skip trailing spaces */
 	while(zSrc < zEnd && SyisSpace(zSrc[0])) {
@ -445,24 +373,6 @@ PH7_PRIVATE sxi32 SyBinaryStrToInt64(const char *zSrc, sxu32 nLen, void *pOutVal
 		c = zSrc[0] - '0';
 		nVal = (nVal << 1) + c;
 		zSrc++;
-		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc - zIn) > 62) {
-			break;
-		}
-		c = zSrc[0] - '0';
-		nVal = (nVal << 1) + c;
-		zSrc++;
-		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc - zIn) > 62) {
-			break;
-		}
-		c = zSrc[0] - '0';
-		nVal = (nVal << 1) + c;
-		zSrc++;
-		if(zSrc >= zEnd || (zSrc[0] != '1' && zSrc[0] != '0') || (int)(zSrc - zIn) > 62) {
-			break;
-		}
-		c = zSrc[0] - '0';
-		nVal = (nVal << 1) + c;
-		zSrc++;
 	}
 	/* Skip trailing spaces */
 	while(zSrc < zEnd && SyisSpace(zSrc[0])) {
@ -523,24 +433,6 @@ PH7_PRIVATE sxi32 SyStrToReal(const char *zSrc, sxu32 nLen, void *pOutVal, const
 		Val = Val * 10.0 + (zSrc[0] - '0') ;
 		zSrc++ ;
 		--Lim;
-		if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-			break ;
-		}
-		Val = Val * 10.0 + (zSrc[0] - '0') ;
-		zSrc++ ;
-		--Lim;
-		if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-			break ;
-		}
-		Val = Val * 10.0 + (zSrc[0] - '0') ;
-		zSrc++ ;
-		--Lim;
-		if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-			break ;
-		}
-		Val = Val * 10.0 + (zSrc[0] - '0') ;
-		zSrc++ ;
-		--Lim;
 	}
 	if(zSrc < zEnd && (zSrc[0] == '.' || zSrc[0] == ',')) {
 		sxreal dec = 1.0;
@ -553,27 +445,6 @@ PH7_PRIVATE sxi32 SyStrToReal(const char *zSrc, sxu32 nLen, void *pOutVal, const
 			dec *= 10.0;
 			zSrc++ ;
 			--Lim;
-			if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-				break ;
-			}
-			Val = Val * 10.0 + (zSrc[0] - '0') ;
-			dec *= 10.0;
-			zSrc++ ;
-			--Lim;
-			if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-				break ;
-			}
-			Val = Val * 10.0 + (zSrc[0] - '0') ;
-			dec *= 10.0;
-			zSrc++ ;
-			--Lim;
-			if(zSrc >= zEnd || !Lim || !SyisDigit(zSrc[0])) {
-				break ;
-			}
-			Val = Val * 10.0 + (zSrc[0] - '0') ;
-			dec *= 10.0;
-			zSrc++ ;
-			--Lim;
 		}
 		Val /= dec;
 	}
@ -638,4 +509,4 @@ PH7_PRIVATE sxi32 SyRealPath(const char *zPath, char **fPath) {
 		return PH7_IO_ERR;
 	}
 	return PH7_OK;
-}
+}