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screen_savers/Nebula: Remove assembly comments from Draw.c.

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This commit is contained in:
Augustin Cavalier
2015-07-07 20:05:05 -04:00
parent e0f44d02f4
commit c93cc19069
1 changed files with 10 additions and 80 deletions
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src/add-ons/screen_savers/nebula/Draw.c
+10 -80
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@@ -17,132 +17,62 @@ void memshset(char* dstParam, int center_shade, int fixed_shade, int half_length
if (half_length == 0)
return;
// movl 8(%ebp),%edi /* dst */
// movl 12(%ebp),%eax /* center_shade*/
// movl 16(%ebp),%ebx /* fixed_shade */
// movl 20(%ebp),%ecx /* half_length */
//
//@ orl %ecx,%ecx
//@ jz 2f
//
dst = (unsigned char*)dstParam;
source = dst;
// movl %edi,%esi
dst -= half_length; // Left segment
// subl %ecx,%edi /* %edi left segment */
source += half_length; // Right segment
// addl %ecx,%esi /* %esi right segment */
source++; // Don't overlap at middle
// incl %esi /* dont overlap at middle */
//
offset = half_length;
// movl %ecx,%edx
offset = -offset;
// negl %edx
offset--; // For in-advance incl in loop
// decl %edx /* for in-advance incl in loop */
do {
int tmp;
//1:
center_shade += fixed_shade; // Increment color.
center_shade &= 0xFFFF; // Mask so we can do overflow tests.
// addl %ebx,%eax /* increment color */
offset++;
// incl %edx
tmp = dst[half_length] + (center_shade >> 8); // Increment left pixel.
// addb %ah,(%edi,%ecx) /* increment left pixel */
// Did it overflow?
if (tmp & 0xFF00) {
// jc 3f /* did overflow ? */
if (tmp & 0xFF00)
dst[half_length] = 255;
//3:
// movb $255,(%edi,%ecx)
} else {
else
dst[half_length] = tmp;
}
tmp = source[offset] + (center_shade >> 8); // Increment right pixel.
// Did it overflow?
if (tmp & 0xFF00) {
if (tmp & 0xFF00)
source[offset] = 255;
//4:
// movb $255,(%esi,%edx)
// decl %ecx
// jnz 1b
//
// popl %ebx
// popl %esi
// popl %edi
//
// leave
// ret
} else {
else
source[offset] = tmp;
}
// addb %ah,(%esi,%edx) /* increment right pixel */
// jc 4f
//
} while (--half_length != 0);
// decl %ecx
// jnz 1b
//
//2:
// popl %ebx
// popl %esi
// popl %edi
//
// leave
// ret
}
/* do the "motion blur" (actually the pixel fading) */
void mblur(char* srcParam, int nbpixels)
{
// movl 8(%ebp),%edi /* dst */
// movl 12(%ebp),%ecx /* number */
unsigned int clear1UpperBit = 0x7f7f7f7f;
unsigned int clear3UpperBits = 0x1f1f1f1f;
unsigned long* src = (unsigned long*)srcParam;
// movl $0x7f7f7f7f,%edx /* clear 1 upper bits */
// movl $0x1f1f1f1f,%esi /* clear 3 upper bits */
if ((nbpixels >>= 2) == 0)
// shrl $2,%ecx
return;
// jz 2f
//
do {
//1:
long eax, ebx;
eax = *src;
// movl (%edi),%eax
src++;
// addl $4,%edi
//
ebx = eax;
// movl %eax,%ebx
eax >>= 1;
// shrl $1,%eax
//
//
ebx >>= 3;
// shrl $3,%ebx
eax &= clear1UpperBit;
// andl %edx,%eax
//
ebx &= clear3UpperBits;
// andl %esi,%ebx
eax += ebx;
// addl %ebx,%eax
//
src[-1] = eax;
// movl %eax,-4(%edi)
} while (--nbpixels != 0);
// decl %ecx
// jnz 1b
}