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DoSharpArgbToYuv: remove constant from loop

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pre-calculating rgb_bit_depth + GetPrecisionShift(rgb_bit_depth)
produces better assembly with clang.

Change-Id: Ic4c3a620c1634fb5ea7001fa709d28c547769f79
This commit is contained in:
James Zern 2023-10-24 17:35:27 -07:00
parent 339231cc37
commit f0cd786125
1 changed files with 2 additions and 2 deletions
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4
sharpyuv/sharpyuv.c
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@ -307,6 +307,7 @@ static int DoSharpArgbToYuv(const uint8_t* r_ptr, const uint8_t* g_ptr,
const int h = (height + 1) & ~1; const int h = (height + 1) & ~1;
const int uv_w = w >> 1; const int uv_w = w >> 1;
const int uv_h = h >> 1; const int uv_h = h >> 1;
const int y_bit_depth = rgb_bit_depth + GetPrecisionShift(rgb_bit_depth);
uint64_t prev_diff_y_sum = ~0; uint64_t prev_diff_y_sum = ~0;
int j, iter; int j, iter;
@ -394,8 +395,7 @@ static int DoSharpArgbToYuv(const uint8_t* r_ptr, const uint8_t* g_ptr,
// update two rows of Y and one row of RGB // update two rows of Y and one row of RGB
diff_y_sum += diff_y_sum +=
SharpYuvUpdateY(target_y, best_rgb_y, best_y, 2 * w, SharpYuvUpdateY(target_y, best_rgb_y, best_y, 2 * w, y_bit_depth);
rgb_bit_depth + GetPrecisionShift(rgb_bit_depth));
SharpYuvUpdateRGB(target_uv, best_rgb_uv, best_uv, 3 * uv_w); SharpYuvUpdateRGB(target_uv, best_rgb_uv, best_uv, 3 * uv_w);
best_y += 2 * w; best_y += 2 * w;