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Working unroll xor

This commit is contained in:
Christopher Taylor 2017-06-04 03:36:15 -07:00
parent 8473b74821
commit 94a4c5731b
1 changed files with 164 additions and 15 deletions
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179
LeopardFF8.cpp
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@ -617,6 +617,135 @@ static void IFFT_DIT2(
#endif
}
// {x_out, y_out} ^= IFFT_DIT2( {x_in, y_in} )
static void IFFT_DIT2_xor(
void * LEO_RESTRICT x_in, void * LEO_RESTRICT y_in,
void * LEO_RESTRICT x_out, void * LEO_RESTRICT y_out,
const ffe_t log_m, uint64_t bytes)
{
#if defined(LEO_TRY_AVX2)
if (CpuHasAVX2)
{
const LEO_M256 table_lo_y = _mm256_loadu_si256(&Multiply256LUT[log_m].Value[0]);
const LEO_M256 table_hi_y = _mm256_loadu_si256(&Multiply256LUT[log_m].Value[1]);
const LEO_M256 clr_mask = _mm256_set1_epi8(0x0f);
const LEO_M256 * LEO_RESTRICT x32_in = reinterpret_cast<const LEO_M256 *>(x_in);
const LEO_M256 * LEO_RESTRICT y32_in = reinterpret_cast<const LEO_M256 *>(y_in);
LEO_M256 * LEO_RESTRICT x32_out = reinterpret_cast<LEO_M256 *>(x_out);
LEO_M256 * LEO_RESTRICT y32_out = reinterpret_cast<LEO_M256 *>(y_out);
do
{
#define LEO_IFFTB_256_XOR(x_ptr_in, y_ptr_in, x_ptr_out, y_ptr_out) { \
LEO_M256 x_data_out = _mm256_loadu_si256(x_ptr_out); \
LEO_M256 y_data_out = _mm256_loadu_si256(y_ptr_out); \
LEO_M256 x_data_in = _mm256_loadu_si256(x_ptr_in); \
LEO_M256 y_data_in = _mm256_loadu_si256(y_ptr_in); \
y_data_in = _mm256_xor_si256(y_data_in, x_data_in); \
y_data_out = _mm256_xor_si256(y_data_out, y_data_in); \
_mm256_storeu_si256(y_ptr_out, y_data_out); \
LEO_MULADD_256(x_data_in, y_data_in, table_lo_y, table_hi_y); \
x_data_out = _mm256_xor_si256(x_data_out, x_data_in); \
_mm256_storeu_si256(x_ptr_out, x_data_out); }
LEO_IFFTB_256_XOR(x32_in + 1, y32_in + 1, x32_out + 1, y32_out + 1);
LEO_IFFTB_256_XOR(x32_in, y32_in, x32_out, y32_out);
y32_in += 2, x32_in += 2, y32_out += 2, x32_out += 2;
bytes -= 64;
} while (bytes > 0);
return;
}
#endif // LEO_TRY_AVX2
if (CpuHasSSSE3)
{
const LEO_M128 table_lo_y = _mm_loadu_si128(&Multiply128LUT[log_m].Value[0]);
const LEO_M128 table_hi_y = _mm_loadu_si128(&Multiply128LUT[log_m].Value[1]);
const LEO_M128 clr_mask = _mm_set1_epi8(0x0f);
const LEO_M128 * LEO_RESTRICT x16_in = reinterpret_cast<const LEO_M128 *>(x_in);
const LEO_M128 * LEO_RESTRICT y16_in = reinterpret_cast<const LEO_M128 *>(y_in);
LEO_M128 * LEO_RESTRICT x16_out = reinterpret_cast<LEO_M128 *>(x_out);
LEO_M128 * LEO_RESTRICT y16_out = reinterpret_cast<LEO_M128 *>(y_out);
do
{
#define LEO_IFFTB_128_XOR(x_ptr_in, y_ptr_in, x_ptr_out, y_ptr_out) { \
LEO_M128 x_data_out = _mm_loadu_si128(x_ptr_out); \
LEO_M128 y_data_out = _mm_loadu_si128(y_ptr_out); \
LEO_M128 x_data_in = _mm_loadu_si128(x_ptr_in); \
LEO_M128 y_data_in = _mm_loadu_si128(y_ptr_in); \
y_data_in = _mm_xor_si128(y_data_in, x_data_in); \
y_data_out = _mm_xor_si128(y_data_out, y_data_in); \
_mm_storeu_si128(y_ptr_out, y_data_out); \
LEO_MULADD_128(x_data_in, y_data_in, table_lo_y, table_hi_y); \
x_data_out = _mm_xor_si128(x_data_out, x_data_in); \
_mm_storeu_si128(x_ptr_out, x_data_out); }
LEO_IFFTB_128_XOR(x16_in + 3, y16_in + 3, x16_out + 3, y16_out + 3);
LEO_IFFTB_128_XOR(x16_in + 2, y16_in + 2, x16_out + 2, y16_out + 2);
LEO_IFFTB_128_XOR(x16_in + 1, y16_in + 1, x16_out + 1, y16_out + 1);
LEO_IFFTB_128_XOR(x16_in, y16_in, x16_out, y16_out);
y16_in += 4, x16_in += 4, y16_out += 4, x16_out += 4;
bytes -= 64;
} while (bytes > 0);
return;
}
// Reference version:
const ffe_t* LEO_RESTRICT lut = Multiply8LUT + log_m * 256;
xor_mem(y_in, x_in, bytes);
#ifdef LEO_TARGET_MOBILE
ffe_t * LEO_RESTRICT x1 = reinterpret_cast<ffe_t *>(x_in);
ffe_t * LEO_RESTRICT y1 = reinterpret_cast<ffe_t *>(y_in);
do
{
for (unsigned j = 0; j < 64; ++j)
x1[j] ^= lut[y1[j]];
x1 += 64, y1 += 64;
bytes -= 64;
} while (bytes > 0);
#else
uint64_t * LEO_RESTRICT x8 = reinterpret_cast<uint64_t *>(x_in);
ffe_t * LEO_RESTRICT y1 = reinterpret_cast<ffe_t *>(y_in);
do
{
for (unsigned j = 0; j < 8; ++j)
{
uint64_t x_0 = x8[j];
x_0 ^= (uint64_t)lut[y1[0]];
x_0 ^= (uint64_t)lut[y1[1]] << 8;
x_0 ^= (uint64_t)lut[y1[2]] << 16;
x_0 ^= (uint64_t)lut[y1[3]] << 24;
x_0 ^= (uint64_t)lut[y1[4]] << 32;
x_0 ^= (uint64_t)lut[y1[5]] << 40;
x_0 ^= (uint64_t)lut[y1[6]] << 48;
x_0 ^= (uint64_t)lut[y1[7]] << 56;
x8[j] = x_0;
y1 += 8;
}
x8 += 8;
bytes -= 64;
} while (bytes > 0);
#endif
xor_mem(y_out, y_in, bytes);
xor_mem(x_out, x_in, bytes);
}
// 4-way butterfly
static void IFFT_DIT4(
uint64_t bytes,
@ -677,7 +806,6 @@ static void IFFT_DIT4(
_mm256_storeu_si256(work1, work1_reg);
_mm256_storeu_si256(work2, work2_reg);
_mm256_storeu_si256(work3, work3_reg);
work0++, work1++, work2++, work3++;
bytes -= 32;
@ -735,7 +863,6 @@ static void IFFT_DIT4(
_mm_storeu_si128(work1, work1_reg);
_mm_storeu_si128(work2, work2_reg);
_mm_storeu_si128(work3, work3_reg);
work0++, work1++, work2++, work3++;
bytes -= 16;
@ -828,27 +955,49 @@ static void IFFT_DIT(
// If there is one layer left:
if (dist < m)
{
// Assuming that dist = m / 2
LEO_DEBUG_ASSERT(dist * 2 == m);
const ffe_t log_m = skewLUT[dist];
if (log_m == kModulus)
VectorXOR(bytes, dist, work + dist, work);
if (xor_result)
{
if (log_m == kModulus)
{
for (unsigned i = 0; i < dist; ++i)
xor_mem_2to1(xor_result[i], work[i], work[i + dist], bytes);
}
else
{
for (unsigned i = 0; i < dist; ++i)
{
IFFT_DIT2_xor(
work[i],
work[i + dist],
xor_result[i],
xor_result[i + dist],
log_m,
bytes);
}
}
}
else
{
for (unsigned i = 0; i < dist; ++i)
if (log_m == kModulus)
VectorXOR(bytes, dist, work + dist, work);
else
{
IFFT_DIT2(
work[i],
work[i + dist],
log_m,
bytes);
for (unsigned i = 0; i < dist; ++i)
{
IFFT_DIT2(
work[i],
work[i + dist],
log_m,
bytes);
}
}
}
}
// FIXME: Roll into last layer
if (xor_result)
for (unsigned i = 0; i < m; ++i)
xor_mem(xor_result[i], work[i], bytes);
}
/*