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/* n is in bytes. dest must begin on pixel boundary. If n is not a whole number
* of pixels, rounding is performed downwards.
* if bmpixelsize is 1, no alignment is required.
* if bmpixelsize is 2, dest must be aligned to 2 bytes.
* if bmpixelsize is 3, no alignment is required.
* if bmpixelsize is 4, dest must be aligned to 4 bytes.
* -- The following do not occur, this is only for forward compatibility.
* if bmpixelsize is 5, no alignment is required.
* if bmpixelsize is 6, dest must be aligned to 2 bytes.
* if bmpixelsize is 7, no alignment is required.
* if bmpixelsize is 8, dest must be aligned to 8 bytes.
*/
static inline void pixel_set(unsigned char *dest, int n,void * pattern)
{
switch(fb_pixelsize)
{
case 1:
memset(dest,*(unsigned char *)pattern,n);
break;
case 2:
{
#ifdef t2c
t2c v=*(t2c *)do_not_optimize_here(pattern);
#ifdef __ICC
volatile /* ICC has an optimization bug here */
#endif
int a;
if ((v & 255) == ((v >> 8) & 255)) {
memset(dest, v, n);
} else {
#ifdef t8c
t8c vvvv=((t8c)v << 48) | ((t8c)v << 32) | ((t8c)v << 16) | v;
#elif defined(t4c)
t4c vv=((t4c)v << 16) | v;
#endif
a = n >> 1;
while (a) {
#ifdef t8c
if (!((unsigned long)dest & 7) && a >= 4) {
do {
*((t8c *)dest) = vvvv;
dest += 8;
a -= 4;
} while (a >= 4);
} else
#elif defined(t4c)
if (!((unsigned long)dest & 3) && a >= 2) {
do {
*((t4c *)dest) = vv;
dest += 4;
a -= 2;
} while (a >= 2);
} else
#endif
{
*((t2c *)dest) = v;
dest += 2;
a--;
}
}
}
#else
unsigned char a,b;
int i;
a=*(unsigned char*)pattern;
b=((unsigned char*)pattern)[1];
if (a == b) memset(dest, a, n);
else for (i=0;i<=n-2;i+=2){
dest[i]=a;
dest[i+1]=b;
}
#endif
}
break;
case 3:
{
unsigned char a,b,c;
int i;
a=*(unsigned char*)pattern;
b=((unsigned char*)pattern)[1];
c=((unsigned char*)pattern)[2];
if (a == b && b == c) memset(dest, a, n);
else for (i=0;i<=n-3;i+=3){
dest[i]=a;
dest[i+1]=b;
dest[i+2]=c;
}
}
break;
case 4:
{
#ifdef t4c
t4c v=*(t4c *)do_not_optimize_here(pattern);
#ifdef __ICC
volatile /* ICC has an optimization bug here */
#endif
int a;
{
#ifdef t8c
t8c vv = ((t8c)v << 32) | v;
#endif
a = n >> 2;
while (a) {
#ifdef t8c
if (!((unsigned long)dest & 7) && a >= 2) {
do {
*((t8c *)dest) = vv;
dest += 8;
a -= 2;
} while (a >= 2);
} else
#endif
{
*(t4c *)dest = v;
dest += 4;
a--;
}
}
}
#else
unsigned char a,b,c,d;
int i;
a=*(unsigned char*)pattern;
b=((unsigned char*)pattern)[1];
c=((unsigned char*)pattern)[2];
d=((unsigned char*)pattern)[3];
for (i=0;i<=n-4;i+=4){
dest[i]=a;
dest[i+1]=b;
dest[i+2]=c;
dest[i+3]=d;
}
#endif
}
break;
default:
{
int a;
for (a=0;a<n/fb_pixelsize;a++,dest+=fb_pixelsize) memcpy(dest,pattern,fb_pixelsize);
}
break;
}
}
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