?? pngvcrd.c
字號:
mov edx,mask
sal edx,24 //make low byte the high byte
secondloop8:
sal edx,1 //move high bit to CF
jnc skip8 //if CF = 0
mov al,[esi]
mov [ebx],al
skip8:
inc esi
inc ebx
dec ecx
jnz secondloop8
end8:
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 8 bpp
case 16:
{
png_bytep srcptr;
png_bytep dstptr;
png_uint_32 len;
int unmask, diff;
__int64 mask1=0x0101020204040808,
mask0=0x1010202040408080;
#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
pand mm0,mm7
pand mm1,mm7
pcmpeqb mm0,mm6
pcmpeqb mm1,mm6
mov ecx,len //load length of line
mov esi,srcptr //load source
mov ebx,dstptr //load dest
cmp ecx,0 //lcr
jz mainloop16end
mainloop16:
movq mm4,[esi]
pand mm4,mm0
movq mm6,mm0
movq mm7,[ebx]
pandn mm6,mm7
por mm4,mm6
movq [ebx],mm4
movq mm5,[esi+8]
pand mm5,mm1
movq mm7,mm1
movq mm6,[ebx+8]
pandn mm7,mm6
por mm5,mm7
movq [ebx+8],mm5
add esi,16 //inc by 16 bytes processed
add ebx,16
sub ecx,8 //dec by 8 pixels processed
ja mainloop16
mainloop16end:
mov ecx,diff
cmp ecx,0
jz end16
mov edx,mask
sal edx,24 //make low byte the high byte
secondloop16:
sal edx,1 //move high bit to CF
jnc skip16 //if CF = 0
mov ax,[esi]
mov [ebx],ax
skip16:
add esi,2
add ebx,2
dec ecx
jnz secondloop16
end16:
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 16 bpp
case 24:
{
png_bytep srcptr;
png_bytep dstptr;
png_uint_32 len;
int unmask, diff;
__int64 mask2=0x0101010202020404, //24bpp
mask1=0x0408080810101020,
mask0=0x2020404040808080;
srcptr = png_ptr->row_buf + 1;
dstptr = row;
unmask = ~mask;
len = (png_ptr->width)&~7;
diff = (png_ptr->width)&7;
#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
{
_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
pand mm0,mm7
pand mm1,mm7
pand mm2,mm7
pcmpeqb mm0,mm6
pcmpeqb mm1,mm6
pcmpeqb mm2,mm6
mov ecx,len //load length of line
mov esi,srcptr //load source
mov ebx,dstptr //load dest
cmp ecx,0
jz mainloop24end
mainloop24:
movq mm4,[esi]
pand mm4,mm0
movq mm6,mm0
movq mm7,[ebx]
pandn mm6,mm7
por mm4,mm6
movq [ebx],mm4
movq mm5,[esi+8]
pand mm5,mm1
movq mm7,mm1
movq mm6,[ebx+8]
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
add esi,24 //inc by 24 bytes processed
add ebx,24
sub ecx,8 //dec by 8 pixels processed
ja mainloop24
mainloop24end:
mov ecx,diff
cmp ecx,0
jz end24
mov edx,mask
sal edx,24 //make low byte the high byte
secondloop24:
sal edx,1 //move high bit to CF
jnc skip24 //if CF = 0
mov ax,[esi]
mov [ebx],ax
xor eax,eax
mov al,[esi+2]
mov [ebx+2],al
skip24:
add esi,3
add ebx,3
dec ecx
jnz secondloop24
end24:
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 24 bpp
case 32:
{
png_bytep srcptr;
png_bytep dstptr;
png_uint_32 len;
int unmask, diff;
__int64 mask3=0x0101010102020202, //32bpp
mask2=0x0404040408080808,
mask1=0x1010101020202020,
mask0=0x4040404080808080;
srcptr = png_ptr->row_buf + 1;
dstptr = row;
unmask = ~mask;
len = (png_ptr->width)&~7;
diff = (png_ptr->width)&7;
#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
{
_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
pand mm0,mm7
pand mm1,mm7
pand mm2,mm7
pand mm3,mm7
pcmpeqb mm0,mm6
pcmpeqb mm1,mm6
pcmpeqb mm2,mm6
pcmpeqb mm3,mm6
mov ecx,len //load length of line
mov esi,srcptr //load source
mov ebx,dstptr //load dest
cmp ecx,0 //lcr
jz mainloop32end
mainloop32:
movq mm4,[esi]
pand mm4,mm0
movq mm6,mm0
movq mm7,[ebx]
pandn mm6,mm7
por mm4,mm6
movq [ebx],mm4
movq mm5,[esi+8]
pand mm5,mm1
movq mm7,mm1
movq mm6,[ebx+8]
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