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gdiplus: Improve performance of matrix multiplication by unrolling loop.

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Bartosz Kosiorek 2022-12-01 18:16:02 +01:00 committed by Alexandre Julliard
parent a97911fdfe
commit 13b16116bf
1 changed files with 7 additions and 9 deletions
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16
dlls/gdiplus/matrix.c
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@ -39,17 +39,15 @@ WINE_DEFAULT_DEBUG_CHANNEL(gdiplus);
*
* and puts the output in out.
* */
static void matrix_multiply(GDIPCONST REAL * left, GDIPCONST REAL * right, REAL * out)
static inline void matrix_multiply(GDIPCONST REAL * left, GDIPCONST REAL * right, REAL * out)
{
REAL temp[6];
int i, odd;
for(i = 0; i < 6; i++){
odd = i % 2;
temp[i] = left[i - odd] * right[odd] + left[i - odd + 1] * right[odd + 2] +
(i >= 4 ? right[odd + 4] : 0.0);
}
temp[0] = left[0] * right[0] + left[1] * right[2];
temp[1] = left[0] * right[1] + left[1] * right[3];
temp[2] = left[2] * right[0] + left[3] * right[2];
temp[3] = left[2] * right[1] + left[3] * right[3];
temp[4] = left[4] * right[0] + left[5] * right[2] + right[4];
temp[5] = left[4] * right[1] + left[5] * right[3] + right[5];
memcpy(out, temp, 6 * sizeof(REAL));
}