int UTF8ToGBK(unsigned char * lpUTF8Str,unsigned char ** lpGBKStr)
{
#ifdef _WIN32
int nRetLen = 0;
nRetLen = WTC(lpUTF8Str,NULL,0);
(* lpGBKStr) = (unsigned char *)malloc((nRetLen + 1)*sizeof(char));
if((* lpGBKStr) == NULL)
return 0;
nRetLen = WTC(lpUTF8Str,(* lpGBKStr),nRetLen);
return nRetLen;
#endif
#ifdef __LINUX__
int nRetLen = strlen((char *)lpUTF8Str) + 1;
* lpGBKStr = (unsigned char *)malloc(nRetLen);
return u2g((char *)lpUTF8Str,strlen((char *)lpUTF8Str),(char *)*lpGBKStr,nRetLen);
#endif
return 0;
}
FDK_INLINE
/* __attribute__((noinline)) */
static void dct_IV_func2(
int i,
const FIXP_SPK *twiddle,
FIXP_DBL *pDat_0,
FIXP_DBL *pDat_1,
int inc)
{
FIXP_DBL accu1, accu2, accu3, accu4, accuX;
LONG val_tw;
accu1 = pDat_1[-2];
accu2 = pDat_1[-1];
*--pDat_1 = -(pDat_0[1]>>1);
*pDat_0++ = (pDat_0[0]>>1);
twiddle += inc;
__asm
{
LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc
B dct_IV_loop2_2nd_part
/* 42 cycles for 2 iterations = 21 cycles/iteration */
dct_IV_loop2:
SMULWT accuX, accu2, val_tw
SMULWB accu2, accu2, val_tw
RSB accuX, accuX, #0
SMLAWB accuX, accu1, val_tw, accuX
SMLAWT accu2, accu1, val_tw, accu2
STR accuX, [pDat_0], #4
STR accu2, [pDat_1, #-4] !
LDR accu4, [pDat_0, #4]
LDR accu3, [pDat_0]
SMULWB accuX, accu4, val_tw
SMULWT accu4, accu4, val_tw
RSB accuX, accuX, #0
SMLAWT accuX, accu3, val_tw, accuX
SMLAWB accu4, accu3, val_tw, accu4
LDR accu1, [pDat_1, #-8]
LDR accu2, [pDat_1, #-4]
LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc
STR accuX, [pDat_1, #-4] !
STR accu4, [pDat_0], #4
dct_IV_loop2_2nd_part:
SMULWT accuX, accu2, val_tw
SMULWB accu2, accu2, val_tw
RSB accuX, accuX, #0
SMLAWB accuX, accu1, val_tw, accuX
SMLAWT accu2, accu1, val_tw, accu2
STR accuX, [pDat_0], #4
STR accu2, [pDat_1, #-4] !
LDR accu4, [pDat_0, #4]
LDR accu3, [pDat_0]
SMULWB accuX, accu4, val_tw
SMULWT accu4, accu4, val_tw
RSB accuX, accuX, #0
SMLAWT accuX, accu3, val_tw, accuX
SMLAWB accu4, accu3, val_tw, accu4
LDR accu1, [pDat_1, #-8]
LDR accu2, [pDat_1, #-4]
STR accuX, [pDat_1, #-4] !
STR accu4, [pDat_0], #4
LDR val_tw, [twiddle], inc, LSL #2 // val_tw = *twiddle; twiddle += inc
SUBS i, i, #1
BNE dct_IV_loop2
}
/* Last Sin and Cos value pair are the same */
accu1 = fMultDiv2(accu1, WTC(0x5a82799a));
accu2 = fMultDiv2(accu2, WTC(0x5a82799a));
*--pDat_1 = accu1 + accu2;
*pDat_0++ = accu1 - accu2;
}
LDR accu4, [pDat_0] // accu4 = pDat_0[0]
LDR accu3, [pDat_0, #4] // accu3 = pDat_0[1]
RSB accu4, accu4, #0 // accu4 = -accu4
RSB accu3, accu3, #0 // accu3 = -accu3
SMULWB accu1, accu3, val_tw // accu1 = (-accu3)*val_tw.h
SMULWT accu2, accu3, val_tw // accu2 = (-accu3)*val_tw.l
RSB accu1, accu1, #0 // accu1 = -(-accu3)*val_tw.h
SMLAWT accu3, accu4, val_tw, accu1 // accu3 = (-accu4)*val_tw.l-(-accu3)*val_tw.h
SMLAWB accu4, accu4, val_tw, accu2 // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h
LDR accu1, [pDat_1, #-4] // accu1 = pDat_1[-1]
LDR accu2, [pDat_1] // accu2 = pDat_1[0]
STR accu3, [pDat_0], #4 // *pDat_0++ = accu3
STR accu4, [pDat_1], #-4 // *pDat_1-- = accu4
SUBS i, i, #1
BNE dst_IV_loop2
}
/* Last Sin and Cos value pair are the same */
accu1 = fMultDiv2(-accu1, WTC(0x5a82799a));
accu2 = fMultDiv2(-accu2, WTC(0x5a82799a));
*pDat_0 = accu1 + accu2;
*pDat_1 = accu1 - accu2;
}
#endif /* FUNCTION_dst_IV_func2 */