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Further tiny XFB speedup: baked the bias constants into the R tables, and switched to aligned writes, and made sure efb_buffer is aligned.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@890 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard
2008-10-16 08:11:03 +00:00
parent 0667c925de
commit caf0d58047
2 changed files with 32 additions and 23 deletions
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29
Source/Core/VideoCommon/Src/XFBConvert.cpp
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@ -50,11 +50,13 @@ void InitXFBConvTables()
_u[i] = _mm_set_epi32( 0, 0, -25624 * (i - 128), 132252 * (i - 128));
_v[i] = _mm_set_epi32( 0, 104595 * (i - 128), -53281 * (i - 128), 0);
_r1[i] = _mm_set_epi32( 28770 * i / 2, 0, -9699 * i / 2, 16843 * i);
_r1[i] = _mm_add_epi32(_mm_set_epi32( 28770 * i / 2, 0, -9699 * i / 2, 16843 * i),
_bias1);
_g1[i] = _mm_set_epi32(-24117 * i / 2, 0, -19071 * i / 2, 33030 * i);
_b1[i] = _mm_set_epi32( -4653 * i / 2, 0, 28770 * i / 2, 6423 * i);
_r2[i] = _mm_set_epi32( 28770 * i / 2, 16843 * i, -9699 * i / 2, 0);
_r2[i] = _mm_add_epi32(_mm_set_epi32( 28770 * i / 2, 16843 * i, -9699 * i / 2, 0),
_bias2);
_g2[i] = _mm_set_epi32(-24117 * i / 2, 33030 * i, -19071 * i / 2, 0);
_b2[i] = _mm_set_epi32( -4653 * i / 2, 6423 * i, 28770 * i / 2, 0);
}
@ -62,6 +64,9 @@ void InitXFBConvTables()
void ConvertFromXFB(u32 *dst, const u8* _pXFB, int width, int height)
{
if (((size_t)dst & 0xF) != 0) {
PanicAlert("ConvertFromXFB - unaligned destination");
}
const unsigned char *src = _pXFB;
u32 numBlocks = ((width * height) / 2) / 2;
for (u32 i = 0; i < numBlocks; i++)
@ -81,7 +86,7 @@ void ConvertFromXFB(u32 *dst, const u8* _pXFB, int width, int height)
__m128i c4 = _mm_srai_epi32(_mm_add_epi32(y2_2, _mm_add_epi32(u_2, v_2)), 16);
__m128i four_dest = _mm_packus_epi16(_mm_packs_epi32(c1, c2), _mm_packs_epi32(c3, c4));
_mm_storeu_si128((__m128i *)dst, four_dest);
_mm_store_si128((__m128i *)dst, four_dest);
dst += 4;
src += 8;
}
@ -93,30 +98,30 @@ void ConvertToXFB(u32 *dst, const u8* _pEFB, int width, int height)
u32 numBlocks = ((width * height) / 2) / 4;
if (((size_t)dst & 0xF) != 0) {
PanicAlert("Weird - unaligned XFB");
PanicAlert("ConvertToXFB - unaligned XFB");
}
__m128i zero = _mm_setzero_si128();
for (int i = 0; i < numBlocks; i++)
{
__m128i yuyv0 = _mm_srai_epi32(
_mm_add_epi32(
_mm_add_epi32(_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])), _bias1),
_mm_add_epi32(_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]])), _bias2)), 16);
_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])),
_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]]))), 16);
src += 8;
__m128i yuyv1 = _mm_srai_epi32(
_mm_add_epi32(
_mm_add_epi32(_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])), _bias1),
_mm_add_epi32(_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]])), _bias2)), 16);
_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])),
_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]]))), 16);
src += 8;
__m128i yuyv2 = _mm_srai_epi32(
_mm_add_epi32(
_mm_add_epi32(_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])), _bias1),
_mm_add_epi32(_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]])), _bias2)), 16);
_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])),
_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]]))), 16);
src += 8;
__m128i yuyv3 = _mm_srai_epi32(
_mm_add_epi32(
_mm_add_epi32(_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])), _bias1),
_mm_add_epi32(_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]])), _bias2)), 16);
_mm_add_epi32(_r1[src[0]], _mm_add_epi32(_g1[src[1]], _b1[src[2]])),
_mm_add_epi32(_r2[src[4]], _mm_add_epi32(_g2[src[5]], _b2[src[6]]))), 16);
src += 8;
__m128i four_dest = _mm_packus_epi16(_mm_packs_epi32(yuyv0, yuyv1), _mm_packs_epi32(yuyv2, yuyv3));
_mm_store_si128((__m128i *)dst, four_dest);