?? pngvcrd.c
字號:
pandn mm7,mm6
por mm5,mm7
movq [ebx+8],mm5
movq mm6,[esi+16]
pand mm6,mm2
movq mm4,mm2
movq mm7,[ebx+16]
pandn mm4,mm7
por mm6,mm4
movq [ebx+16],mm6
movq mm7,[esi+24]
pand mm7,mm3
movq mm5,mm3
movq mm4,[ebx+24]
pandn mm5,mm4
por mm7,mm5
movq [ebx+24],mm7
add esi,32 //inc by 32 bytes processed
add ebx,32
sub ecx,8 //dec by 8 pixels processed
ja mainloop32
mainloop32end:
mov ecx,diff
cmp ecx,0
jz end32
mov edx,mask
sal edx,24 //make low byte the high byte
secondloop32:
sal edx,1 //move high bit to CF
jnc skip32 //if CF = 0
mov eax,[esi]
mov [ebx],eax
skip32:
add esi,4
add ebx,4
dec ecx
jnz secondloop32
end32:
emms
}
}
else /* mmx _not supported - Use modified C routine */
{
register unsigned int incr1, initial_val, final_val;
png_size_t pixel_bytes;
png_uint_32 i;
register int disp = png_pass_inc[png_ptr->pass];
int offset_table[7] = {0, 4, 0, 2, 0, 1, 0};
pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]*
pixel_bytes;
dstptr = row + offset_table[png_ptr->pass]*pixel_bytes;
initial_val = offset_table[png_ptr->pass]*pixel_bytes;
final_val = png_ptr->width*pixel_bytes;
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
}
} /* end of else */
break;
} // end 32 bpp
case 48:
{
png_bytep srcptr;
png_bytep dstptr;
png_uint_32 len;
int unmask, diff;
__int64 mask5=0x0101010101010202,
mask4=0x0202020204040404,
mask3=0x0404080808080808,
mask2=0x1010101010102020,
mask1=0x2020202040404040,
mask0=0x4040808080808080;
#if !defined(PNG_1_0_X)
if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)
/* && mmx_supported */ )
#else
if (mmx_supported)
#endif
{
srcptr = png_ptr->row_buf + 1;
dstptr = row;
unmask = ~mask;
len = (png_ptr->width)&~7;
diff = (png_ptr->width)&7;
_asm
{
movd mm7, unmask //load bit pattern
psubb mm6,mm6 //zero mm6
punpcklbw mm7,mm7
punpcklwd mm7,mm7
punpckldq mm7,mm7 //fill register with 8 masks
movq mm0,mask0
movq mm1,mask1
movq mm2,mask2
movq mm3,mask3
movq mm4,mask4
movq mm5,mask5
pand mm0,mm7
pand mm1,mm7
pand mm2,mm7
pand mm3,mm7
pand mm4,mm7
pand mm5,mm7
pcmpeqb mm0,mm6
pcmpeqb mm1,mm6
pcmpeqb mm2,mm6
pcmpeqb mm3,mm6
pcmpeqb mm4,mm6
pcmpeqb mm5,mm6
mov ecx,len //load length of line
mov esi,srcptr //load source
mov ebx,dstptr //load dest
cmp ecx,0
jz mainloop48end
mainloop48:
movq mm7,[esi]
pand mm7,mm0
movq mm6,mm0
pandn mm6,[ebx]
por mm7,mm6
movq [ebx],mm7
movq mm6,[esi+8]
pand mm6,mm1
movq mm7,mm1
pandn mm7,[ebx+8]
por mm6,mm7
movq [ebx+8],mm6
movq mm6,[esi+16]
pand mm6,mm2
movq mm7,mm2
pandn mm7,[ebx+16]
por mm6,mm7
movq [ebx+16],mm6
movq mm7,[esi+24]
pand mm7,mm3
movq mm6,mm3
pandn mm6,[ebx+24]
por mm7,mm6
movq [ebx+24],mm7
movq mm6,[esi+32]
pand mm6,mm4
movq mm7,mm4
pandn mm7,[ebx+32]
por mm6,mm7
movq [ebx+32],mm6
movq mm7,[esi+40]
pand mm7,mm5
movq mm6,mm5
pandn mm6,[ebx+40]
por mm7,mm6
movq [ebx+40],mm7
add esi,48 //inc by 32 bytes processed
add ebx,48
sub ecx,8 //dec by 8 pixels processed
ja mainloop48
mainloop48end:
mov ecx,diff
cmp ecx,0
jz end48
mov edx,mask
sal edx,24 //make low byte the high byte
secondloop48:
sal edx,1 //move high bit to CF
jnc skip48 //if CF = 0
mov eax,[esi]
mov [ebx],eax
skip48:
add esi,4
add ebx,4
dec ecx
jnz secondloop48
end48:
emms
}
}
else /* mmx _not supported - Use modified C routine */
{
register unsigned int incr1, initial_val, final_val;
png_size_t pixel_bytes;
png_uint_32 i;
register int disp = png_pass_inc[png_ptr->pass];
int offset_table[7] = {0, 4, 0, 2, 0, 1, 0};
pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]*
pixel_bytes;
dstptr = row + offset_table[png_ptr->pass]*pixel_bytes;
initial_val = offset_table[png_ptr->pass]*pixel_bytes;
final_val = png_ptr->width*pixel_bytes;
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
png_memcpy(dstptr, srcptr, pixel_bytes);
srcptr += incr1;
dstptr += incr1;
}
} /* end of else */
break;
} // end 48 bpp
default:
{
png_bytep sptr;
png_bytep dp;
png_size_t pixel_bytes;
int offset_table[7] = {0, 4, 0, 2, 0, 1, 0};
unsigned int i;
register int disp = png_pass_inc[png_ptr->pass]; // get the offset
register unsigned int incr1, initial_val, final_val;
pixel_bytes = (png_ptr->row_info.pixel_depth >> 3);
sptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]*
pixel_bytes;
dp = row + offset_table[png_ptr->pass]*pixel_bytes;
initial_val = offset_table[png_ptr->pass]*pixel_bytes;
final_val = png_ptr->width*pixel_bytes;
incr1 = (disp)*pixel_bytes;
for (i = initial_val; i < final_val; i += incr1)
{
png_memcpy(dp, sptr, pixel_bytes);
sptr += incr1;
dp += incr1;
}
break;
}
} /* end switch (png_ptr->row_info.pixel_depth) */
} /* end if (non-trivial mask) */
} /* end png_combine_row() */
#if defined(PNG_READ_INTERLACING_SUPPORTED)
void /* PRIVATE */
png_do_read_interlace(png_structp png_ptr)
{
png_row_infop row_info = &(png_ptr->row_info);
png_bytep row = png_ptr->row_buf + 1;
int pass = png_ptr->pass;
png_uint_32 transformations = png_ptr->transformations;
#ifdef PNG_USE_LOCAL_ARRAYS
const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1};
#endif
png_debug(1,"in png_do_read_interlace\n");
if (mmx_supported == 2) {
#if !defined(PNG_1_0_X)
/* this should have happened in png_init_mmx_flags() already */
png_warning(png_ptr, "asm_flags may not have been initialized");
#endif
png_mmx_support();
}
if (row != NULL && row_info != NULL)
{
png_uint_32 final_width;
final_width = row_info->width * png_pass_inc[pass];
switch (row_info->pixel_depth)
{
case 1:
{
png_bytep sp, dp;
int sshift, dshift;
int s_start, s_end, s_inc;
png_byte v;
png_uint_32 i;
int j;
sp = row + (png_size_t)((row_info->width - 1) >> 3);
dp = row + (png_size_t)((final_width - 1) >> 3);
#if defined(PNG_READ_PACKSWAP_SUPPORTED)
if (transformations & PNG_PACKSWAP)
{
sshift = (int)((row_info->width + 7) & 7);
dshift = (int)((final_width + 7) & 7);
s_start = 7;
s_end = 0;
s_inc = -1;
}
else
#endif
{
sshift = 7 - (int)((row_info->width + 7) & 7);
dshift = 7 - (int)((final_width + 7) & 7);
s_start = 0;
s_end = 7;
s_inc = 1;
}
for (i = row_info->width; i; i--)
{
v = (png_byte)((*sp >> sshift) & 0x1);
for (j = 0; j < png_pass_inc[pass]; j++)
{
*dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff);
*dp |= (png_byte)(v << dshift);
if (dshift == s_end)
{
dshift = s_start;
dp--;
}
else
dshift += s_inc;
}
if (sshift == s_end)
{
sshift = s_start;
sp--;
}
else
sshift += s_inc;
}
break;
}
case 2:
{
png_bytep sp, dp;
int sshift, dshift;
int s_start, s_end, s_inc;
png_uint_32 i;
sp = row + (png_size_t)((row_info->width - 1) >> 2);
dp = row + (png_size_t)((final_width - 1) >> 2);
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