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New SSSE3 implementation of RGB5A3. About 40% improvement (less cycles) on the plain C version and 17% on the SSE2 version. 

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6779 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
xsacha 2011-01-08 02:52:07 +00:00
parent bedc889a56
commit f667c03d55
1 changed files with 221 additions and 171 deletions
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392
Source/Core/VideoCommon/Src/TextureDecoder.cpp
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@ -1444,201 +1444,251 @@ PC_TexFormat TexDecoder_Decode_RGBA(u32 * dst, const u8 * src, int width, int he
// This is the hard-coded 0xFF alpha constant that is ORed in place after the RGB are calculated
// for the RGB555 case when (s[x] & 0x8000) is true for all pixels.
const __m128i aVxff00 = _mm_set_epi32(0xFF000000L, 0xFF000000L, 0xFF000000L, 0xFF000000L);
for (int y = 0; y < height; y += 4)
for (int x = 0; x < width; x += 4)
for (int iy = 0; iy < 4; iy++, src += 8)
{
u32 *newdst = dst+(y+iy)*width+x;
const u16 *newsrc = (const u16*)src;
// TODO: weak point
const u16 val0 = Common::swap16(newsrc[0]);
const u16 val1 = Common::swap16(newsrc[1]);
const u16 val2 = Common::swap16(newsrc[2]);
const u16 val3 = Common::swap16(newsrc[3]);
// Need to check all 4 pixels' MSBs to ensure we can do data-parallelism:
if (((val0 & 0x8000) & (val1 & 0x8000) & (val2 & 0x8000) & (val3 & 0x8000)) == 0x8000)
#if _M_SSE >= 0x301
// Produces a ~40% speed improvement over reference C implementation
if (cpu_info.bSSE3)
{
// SSE2 case #1: all 4 pixels are in RGB555 and alpha = 0xFF.
const __m128i valV = _mm_set_epi16(0, val3, 0, val2, 0, val1, 0, val0);
// Swizzle bits: 00012345 -> 12345123
//r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 10), kMask_x1f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 3), _mm_srli_epi16(tmprV, 2) );
//newdst[0] = r0 | (_______) | (________) | (________);
__m128i final = rV;
//g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 5), kMask_x1f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 3), _mm_srli_epi16(tmpgV, 2) );
//newdst[0] = r0 | (g0 << 8) | (________) | (________);
final = _mm_or_si128(
final,
_mm_slli_epi32(gV, 8)
);
//b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x1f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 3), _mm_srli_epi16(tmpbV, 2) );
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (________);
final = _mm_or_si128(
final,
_mm_slli_epi32(bV, 16)
);
// Alphas are ORed in as a constant __m128i.
//a0 = 0xFF;
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
final = _mm_or_si128(
final,
aVxff00
);
// write the final result:
_mm_storeu_si128( (__m128i*)newdst, final );
}
else if (((val0 & 0x8000) | (val1 & 0x8000) | (val2 & 0x8000) | (val3 & 0x8000)) == 0x0000)
{
// SSE2 case #2: all 4 pixels are in RGBA4443.
const __m128i valV = _mm_set_epi16(0, val3, 0, val2, 0, val1, 0, val0);
// Swizzle bits: 00001234 -> 12341234
//r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 8), kMask_x0f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 4), tmprV );
//newdst[0] = r0 | (_______) | (________) | (________);
__m128i final = rV;
//g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 4), kMask_x0f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 4), tmpgV );
//newdst[0] = r0 | (g0 << 8) | (________) | (________);
final = _mm_or_si128(
final,
_mm_slli_epi32(gV, 8)
);
//b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x0f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 4), tmpbV );
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (________);
final = _mm_or_si128(
final,
_mm_slli_epi32(bV, 16)
);
//a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
const __m128i tmpaV = _mm_and_si128(_mm_srli_epi16(valV, 12), kMask_x07);
const __m128i aV = _mm_or_si128(
_mm_slli_epi16(tmpaV, 5),
_mm_or_si128(
_mm_slli_epi16(tmpaV, 2),
_mm_srli_epi16(tmpaV, 1)
)
);
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
final = _mm_or_si128(
final,
_mm_slli_epi32(aV, 24)
);
// write the final result:
_mm_storeu_si128( (__m128i*)newdst, final );
}
else
{
// Horrific fallback case, but hey at least it's inlined :D
// Maybe overkill? I see slight improvements on my machine as far as RDTSC
// counts and it's all done in registers (on x64). No temp memory moves!
int r0,g0,b0,a0;
int r1,g1,b1,a1;
int r2,g2,b2,a2;
int r3,g3,b3,a3;
// Normal operation, no parallelism to take advantage of:
if (val0 & 0x8000)
const __m128i mask = _mm_set_epi8(128,128,6,7,128,128,4,5,128,128,2,3,128,128,0,1);
const __m128i valV = _mm_shuffle_epi8(_mm_loadl_epi64((const __m128i*)src),mask);
int cmp = _mm_movemask_epi8(valV); //MSB: 0x2 = val0; 0x20=val1; 0x200 = val2; 0x2000=val3
if ((cmp&0x2222)==0x2222) // SSSE3 case #1: all 4 pixels are in RGB555 and alpha = 0xFF.
{
// Swizzle bits: 00012345 -> 12345123
r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
a0 = 0xFF;
//r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 10), kMask_x1f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 3), _mm_srli_epi16(tmprV, 2) );
//g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 5), kMask_x1f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 3), _mm_srli_epi16(tmpgV, 2) );
//b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x1f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 3), _mm_srli_epi16(tmpbV, 2) );
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
const __m128i final = _mm_or_si128( _mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
_mm_or_si128(_mm_slli_epi32(bV, 16), aVxff00));
_mm_storeu_si128( (__m128i*)newdst, final );
}
else
else if (!(cmp&0x2222)) // SSSE3 case #2: all 4 pixels are in RGBA4443.
{
a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
// Swizzle bits: 00001234 -> 12341234
r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
}
newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
if (val1 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r1 = (((val1>>10) & 0x1f) << 3) | (((val1>>10) & 0x1f) >> 2);
g1 = (((val1>>5 ) & 0x1f) << 3) | (((val1>>5 ) & 0x1f) >> 2);
b1 = (((val1 ) & 0x1f) << 3) | (((val1 ) & 0x1f) >> 2);
a1 = 0xFF;
//r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 8), kMask_x0f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 4), tmprV );
//g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 4), kMask_x0f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 4), tmpgV );
//b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x0f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 4), tmpbV );
//a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
const __m128i tmpaV = _mm_and_si128(_mm_srli_epi16(valV, 12), kMask_x07);
const __m128i aV = _mm_or_si128(
_mm_slli_epi16(tmpaV, 5),
_mm_or_si128(
_mm_slli_epi16(tmpaV, 2),
_mm_srli_epi16(tmpaV, 1)
)
);
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
const __m128i final = _mm_or_si128( _mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
_mm_or_si128(_mm_slli_epi32(bV, 16), _mm_slli_epi32(aV, 24)));
_mm_storeu_si128( (__m128i*)newdst, final );
}
else
{
a1 = (((val1>>12) & 0x7) << 5) | (((val1>>12) & 0x7) << 2) | (((val1>>12) & 0x7) >> 1);
r1 = (((val1>>8 ) & 0xf) << 4) | ((val1>>8 ) & 0xf);
g1 = (((val1>>4 ) & 0xf) << 4) | ((val1>>4 ) & 0xf);
b1 = (((val1 ) & 0xf) << 4) | ((val1 ) & 0xf);
// TODO: Vectorise (Either 4-way branch or do both and select is better than this)
unsigned __int32 *vals = (unsigned __int32*) &valV;
int r,g,b,a;
for (int i=0; i < 4; ++i)
{
if (vals[i] & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r = (((vals[i]>>10) & 0x1f) << 3) | (((vals[i]>>10) & 0x1f) >> 2);
g = (((vals[i]>>5 ) & 0x1f) << 3) | (((vals[i]>>5 ) & 0x1f) >> 2);
b = (((vals[i] ) & 0x1f) << 3) | (((vals[i] ) & 0x1f) >> 2);
a = 0xFF;
}
else
{
a = (((vals[i]>>12) & 0x7) << 5) | (((vals[i]>>12) & 0x7) << 2) | (((vals[i]>>12) & 0x7) >> 1);
// Swizzle bits: 00001234 -> 12341234
r = (((vals[i]>>8 ) & 0xf) << 4) | ((vals[i]>>8 ) & 0xf);
g = (((vals[i]>>4 ) & 0xf) << 4) | ((vals[i]>>4 ) & 0xf);
b = (((vals[i] ) & 0xf) << 4) | ((vals[i] ) & 0xf);
}
newdst[i] = r | (g << 8) | (b << 16) | (a << 24);
}
}
newdst[1] = r1 | (g1 << 8) | (b1 << 16) | (a1 << 24);
} else
#endif
{
const u16 *newsrc = (const u16*)src;
if (val2 & 0x8000)
// TODO: weak point
const u16 val0 = Common::swap16(newsrc[0]);
const u16 val1 = Common::swap16(newsrc[1]);
const u16 val2 = Common::swap16(newsrc[2]);
const u16 val3 = Common::swap16(newsrc[3]);
// Need to check all 4 pixels' MSBs to ensure we can do data-parallelism:
if (((val0 & 0x8000) & (val1 & 0x8000) & (val2 & 0x8000) & (val3 & 0x8000)) == 0x8000)
{
// SSE2 case #1: all 4 pixels are in RGB555 and alpha = 0xFF.
const __m128i valV = _mm_set_epi16(0, val3, 0, val2, 0, val1, 0, val0);
// Swizzle bits: 00012345 -> 12345123
r2 = (((val2>>10) & 0x1f) << 3) | (((val2>>10) & 0x1f) >> 2);
g2 = (((val2>>5 ) & 0x1f) << 3) | (((val2>>5 ) & 0x1f) >> 2);
b2 = (((val2 ) & 0x1f) << 3) | (((val2 ) & 0x1f) >> 2);
a2 = 0xFF;
//r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 10), kMask_x1f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 3), _mm_srli_epi16(tmprV, 2) );
//g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 5), kMask_x1f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 3), _mm_srli_epi16(tmpgV, 2) );
//b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x1f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 3), _mm_srli_epi16(tmpbV, 2) );
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
const __m128i final = _mm_or_si128( _mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
_mm_or_si128(_mm_slli_epi32(bV, 16), aVxff00));
// write the final result:
_mm_storeu_si128( (__m128i*)newdst, final );
}
else if (((val0 & 0x8000) | (val1 & 0x8000) | (val2 & 0x8000) | (val3 & 0x8000)) == 0x0000)
{
// SSE2 case #2: all 4 pixels are in RGBA4443.
const __m128i valV = _mm_set_epi16(0, val3, 0, val2, 0, val1, 0, val0);
// Swizzle bits: 00001234 -> 12341234
//r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
const __m128i tmprV = _mm_and_si128(_mm_srli_epi16(valV, 8), kMask_x0f);
const __m128i rV = _mm_or_si128( _mm_slli_epi16(tmprV, 4), tmprV );
//g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
const __m128i tmpgV = _mm_and_si128(_mm_srli_epi16(valV, 4), kMask_x0f);
const __m128i gV = _mm_or_si128( _mm_slli_epi16(tmpgV, 4), tmpgV );
//b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
const __m128i tmpbV = _mm_and_si128(valV, kMask_x0f);
const __m128i bV = _mm_or_si128( _mm_slli_epi16(tmpbV, 4), tmpbV );
//a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
const __m128i tmpaV = _mm_and_si128(_mm_srli_epi16(valV, 12), kMask_x07);
const __m128i aV = _mm_or_si128(
_mm_slli_epi16(tmpaV, 5),
_mm_or_si128(
_mm_slli_epi16(tmpaV, 2),
_mm_srli_epi16(tmpaV, 1)
)
);
//newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
const __m128i final = _mm_or_si128( _mm_or_si128(rV,_mm_slli_epi32(gV, 8)),
_mm_or_si128(_mm_slli_epi32(bV, 16), _mm_slli_epi32(aV, 24)));
// write the final result:
_mm_storeu_si128( (__m128i*)newdst, final );
}
else
{
a2 = (((val2>>12) & 0x7) << 5) | (((val2>>12) & 0x7) << 2) | (((val2>>12) & 0x7) >> 1);
r2 = (((val2>>8 ) & 0xf) << 4) | ((val2>>8 ) & 0xf);
g2 = (((val2>>4 ) & 0xf) << 4) | ((val2>>4 ) & 0xf);
b2 = (((val2 ) & 0xf) << 4) | ((val2 ) & 0xf);
}
newdst[2] = r2 | (g2 << 8) | (b2 << 16) | (a2 << 24);
// Horrific fallback case, but hey at least it's inlined :D
// Maybe overkill? I see slight improvements on my machine as far as RDTSC
// counts and it's all done in registers (on x64). No temp memory moves!
int r0,g0,b0,a0;
int r1,g1,b1,a1;
int r2,g2,b2,a2;
int r3,g3,b3,a3;
if (val3 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r3 = (((val3>>10) & 0x1f) << 3) | (((val3>>10) & 0x1f) >> 2);
g3 = (((val3>>5 ) & 0x1f) << 3) | (((val3>>5 ) & 0x1f) >> 2);
b3 = (((val3 ) & 0x1f) << 3) | (((val3 ) & 0x1f) >> 2);
a3 = 0xFF;
// Normal operation, no parallelism to take advantage of:
if (val0 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r0 = (((val0>>10) & 0x1f) << 3) | (((val0>>10) & 0x1f) >> 2);
g0 = (((val0>>5 ) & 0x1f) << 3) | (((val0>>5 ) & 0x1f) >> 2);
b0 = (((val0 ) & 0x1f) << 3) | (((val0 ) & 0x1f) >> 2);
a0 = 0xFF;
}
else
{
a0 = (((val0>>12) & 0x7) << 5) | (((val0>>12) & 0x7) << 2) | (((val0>>12) & 0x7) >> 1);
// Swizzle bits: 00001234 -> 12341234
r0 = (((val0>>8 ) & 0xf) << 4) | ((val0>>8 ) & 0xf);
g0 = (((val0>>4 ) & 0xf) << 4) | ((val0>>4 ) & 0xf);
b0 = (((val0 ) & 0xf) << 4) | ((val0 ) & 0xf);
}
newdst[0] = r0 | (g0 << 8) | (b0 << 16) | (a0 << 24);
if (val1 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r1 = (((val1>>10) & 0x1f) << 3) | (((val1>>10) & 0x1f) >> 2);
g1 = (((val1>>5 ) & 0x1f) << 3) | (((val1>>5 ) & 0x1f) >> 2);
b1 = (((val1 ) & 0x1f) << 3) | (((val1 ) & 0x1f) >> 2);
a1 = 0xFF;
}
else
{
a1 = (((val1>>12) & 0x7) << 5) | (((val1>>12) & 0x7) << 2) | (((val1>>12) & 0x7) >> 1);
r1 = (((val1>>8 ) & 0xf) << 4) | ((val1>>8 ) & 0xf);
g1 = (((val1>>4 ) & 0xf) << 4) | ((val1>>4 ) & 0xf);
b1 = (((val1 ) & 0xf) << 4) | ((val1 ) & 0xf);
}
newdst[1] = r1 | (g1 << 8) | (b1 << 16) | (a1 << 24);
if (val2 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r2 = (((val2>>10) & 0x1f) << 3) | (((val2>>10) & 0x1f) >> 2);
g2 = (((val2>>5 ) & 0x1f) << 3) | (((val2>>5 ) & 0x1f) >> 2);
b2 = (((val2 ) & 0x1f) << 3) | (((val2 ) & 0x1f) >> 2);
a2 = 0xFF;
}
else
{
a2 = (((val2>>12) & 0x7) << 5) | (((val2>>12) & 0x7) << 2) | (((val2>>12) & 0x7) >> 1);
r2 = (((val2>>8 ) & 0xf) << 4) | ((val2>>8 ) & 0xf);
g2 = (((val2>>4 ) & 0xf) << 4) | ((val2>>4 ) & 0xf);
b2 = (((val2 ) & 0xf) << 4) | ((val2 ) & 0xf);
}
newdst[2] = r2 | (g2 << 8) | (b2 << 16) | (a2 << 24);
if (val3 & 0x8000)
{
// Swizzle bits: 00012345 -> 12345123
r3 = (((val3>>10) & 0x1f) << 3) | (((val3>>10) & 0x1f) >> 2);
g3 = (((val3>>5 ) & 0x1f) << 3) | (((val3>>5 ) & 0x1f) >> 2);
b3 = (((val3 ) & 0x1f) << 3) | (((val3 ) & 0x1f) >> 2);
a3 = 0xFF;
}
else
{
a3 = (((val3>>12) & 0x7) << 5) | (((val3>>12) & 0x7) << 2) | (((val3>>12) & 0x7) >> 1);
r3 = (((val3>>8 ) & 0xf) << 4) | ((val3>>8 ) & 0xf);
g3 = (((val3>>4 ) & 0xf) << 4) | ((val3>>4 ) & 0xf);
b3 = (((val3 ) & 0xf) << 4) | ((val3 ) & 0xf);
}
newdst[3] = r3 | (g3 << 8) | (b3 << 16) | (a3 << 24);
}
else
{
a3 = (((val3>>12) & 0x7) << 5) | (((val3>>12) & 0x7) << 2) | (((val3>>12) & 0x7) >> 1);
r3 = (((val3>>8 ) & 0xf) << 4) | ((val3>>8 ) & 0xf);
g3 = (((val3>>4 ) & 0xf) << 4) | ((val3>>4 ) & 0xf);
b3 = (((val3 ) & 0xf) << 4) | ((val3 ) & 0xf);
}
newdst[3] = r3 | (g3 << 8) | (b3 << 16) | (a3 << 24);
}
}
#if 0