aaru-dps/Aaru.Checksums.Native
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Refactor and reformat.

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This commit is contained in:
Natalia Portillo
2023-09-23 18:55:52 +01:00
parent 33f021fd54
commit 1905cb0d43
41 changed files with 1557 additions and 1462 deletions
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36
fletcher32_ssse3.c
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@@ -40,16 +40,17 @@
#include "fletcher32.h"
/**
* @brief Calculate Fletcher-32 checksum for a given data using SSSE3 instructions.
* @brief Calculate Fletcher-32 checksum for a given data using TARGET_WITH_SSSE3 instructions.
*
* This function calculates the Fletcher-32 checksum for a block of data using SSSE3 vector instructions.
* This function calculates the Fletcher-32 checksum for a block of data using TARGET_WITH_SSSE3 vector instructions.
*
* @param sum1 Pointer to the variable where the first 16-bit checksum value is stored.
* @param sum2 Pointer to the variable where the second 16-bit checksum value is stored.
* @param data Pointer to the data buffer.
* @param len Length of the data buffer in bytes.
*/
AARU_EXPORT SSSE3 void AARU_CALL fletcher32_ssse3(uint16_t* sum1, uint16_t* sum2, const uint8_t* data, long len)
AARU_EXPORT TARGET_WITH_SSSE3 void AARU_CALL
fletcher32_ssse3(uint16_t *sum1, uint16_t *sum2, const uint8_t *data, long len)
{
uint32_t s1 = *sum1;
uint32_t s2 = *sum2;
@@ -73,15 +74,16 @@ AARU_EXPORT SSSE3 void AARU_CALL fletcher32_ssse3(uint16_t* sum1, uint16_t* sum2
* Process n blocks of data. At most NMAX data bytes can be
* processed before s2 must be reduced modulo BASE.
*/
__m128i v_ps = _mm_set_epi32(0, 0, 0, s1 * n);
__m128i v_s2 = _mm_set_epi32(0, 0, 0, s2);
__m128i v_s1 = _mm_set_epi32(0, 0, 0, 0);
do {
__m128i v_ps = _mm_set_epi32(0, 0, 0, s1 * n);
__m128i v_s2 = _mm_set_epi32(0, 0, 0, s2);
__m128i v_s1 = _mm_set_epi32(0, 0, 0, 0);
do
{
/*
* Load 32 input bytes.
*/
const __m128i bytes1 = _mm_loadu_si128((__m128i*)(data));
const __m128i bytes2 = _mm_loadu_si128((__m128i*)(data + 16));
const __m128i bytes1 = _mm_loadu_si128((__m128i *)(data));
const __m128i bytes2 = _mm_loadu_si128((__m128i *)(data + 16));
/*
* Add previous block byte sum to v_ps.
*/
@@ -90,15 +92,16 @@ AARU_EXPORT SSSE3 void AARU_CALL fletcher32_ssse3(uint16_t* sum1, uint16_t* sum2
* Horizontally add the bytes for s1, multiply-adds the
* bytes by [ 32, 31, 30, ... ] for s2.
*/
v_s1 = _mm_add_epi32(v_s1, _mm_sad_epu8(bytes1, zero));
v_s1 = _mm_add_epi32(v_s1, _mm_sad_epu8(bytes1, zero));
const __m128i mad1 = _mm_maddubs_epi16(bytes1, tap1);
v_s2 = _mm_add_epi32(v_s2, _mm_madd_epi16(mad1, ones));
v_s1 = _mm_add_epi32(v_s1, _mm_sad_epu8(bytes2, zero));
v_s2 = _mm_add_epi32(v_s2, _mm_madd_epi16(mad1, ones));
v_s1 = _mm_add_epi32(v_s1, _mm_sad_epu8(bytes2, zero));
const __m128i mad2 = _mm_maddubs_epi16(bytes2, tap2);
v_s2 = _mm_add_epi32(v_s2, _mm_madd_epi16(mad2, ones));
v_s2 = _mm_add_epi32(v_s2, _mm_madd_epi16(mad2, ones));
data += BLOCK_SIZE;
} while(--n);
v_s2 = _mm_add_epi32(v_s2, _mm_slli_epi32(v_ps, 5));
}
while(--n);
v_s2 = _mm_add_epi32(v_s2, _mm_slli_epi32(v_ps, 5));
/*
* Sum epi32 ints v_s1(s2) and accumulate in s1(s2).
*/
@@ -143,7 +146,8 @@ AARU_EXPORT SSSE3 void AARU_CALL fletcher32_ssse3(uint16_t* sum1, uint16_t* sum2
s2 += (s1 += *data++);
len -= 16;
}
while(len--) { s2 += (s1 += *data++); }
while(len--)
{ s2 += (s1 += *data++); }
if(s1 >= FLETCHER32_MODULE) s1 -= FLETCHER32_MODULE;
s2 %= FLETCHER32_MODULE;
}