cpuminer-opt-gpu/algo/keccak/keccak-4way.c

#include "keccak-gate.h"
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include "keccak-hash-4way.h"

#if defined(KECCAK_8WAY)

void keccakhash_8way(void *state, const void *input)
{
    keccak256_8way_context ctx;
    keccak256_8way_init( &ctx );
    keccak256_8way_update( &ctx, input, 80 );
    keccak256_8way_close( &ctx, state );
}

int scanhash_keccak_8way( struct work *work, uint32_t max_nonce,
                          uint64_t *hashes_done, struct thr_info *mythr )
{
   uint32_t vdata[24*8] __attribute__ ((aligned (128)));
   uint32_t hash[16*8] __attribute__ ((aligned (64)));
   uint32_t lane_hash[8] __attribute__ ((aligned (64)));
   uint32_t *hash7 = &(hash[49]);   // 3*16+1
   uint32_t *pdata = work->data;
   uint32_t *ptarget = work->target;
   uint32_t n = pdata[19];
   const uint32_t first_nonce = pdata[19];
   __m512i  *noncev = (__m512i*)vdata + 9;   // aligned
   const uint32_t Htarg = ptarget[7];
   const int thr_id = mythr->id;  
   const bool bench = opt_benchmark;

   mm512_bswap32_intrlv80_8x64( vdata, pdata );
   *noncev = mm512_intrlv_blend_32(
              _mm512_set_epi32( n+7, 0, n+6, 0, n+5, 0, n+4, 0,
                                n+3, 0, n+2, 0, n+1, 0, n  , 0 ), *noncev );
   do {
      keccakhash_8way( hash, vdata );

      for ( int lane = 0; lane < 8; lane++ )
      if unlikely( hash7[ lane<<1 ] <= Htarg && !bench ) 
      {
          extr_lane_8x64( lane_hash, hash, lane, 256 );
          if ( valid_hash( lane_hash, ptarget ) )
          {
              pdata[19] = bswap_32( n + lane );
              submit_solution( work, lane_hash, mythr );
          }
      }
      *noncev = _mm512_add_epi32( *noncev,
                                  _mm512_set1_epi64( 0x0000000800000000 ) );
      n += 8;

   } while ( (n < max_nonce-8) && !work_restart[thr_id].restart);
   pdata[19] = n;
   *hashes_done = n - first_nonce + 1;
   return 0;
}

#elif defined(KECCAK_4WAY)

void keccakhash_4way(void *state, const void *input)
{
    keccak256_4way_context ctx;
    keccak256_4way_init( &ctx );
    keccak256_4way_update( &ctx, input, 80 );
    keccak256_4way_close( &ctx, state );
}

int scanhash_keccak_4way( struct work *work, uint32_t max_nonce,
                          uint64_t *hashes_done, struct thr_info *mythr )
{
   uint32_t vdata[24*4] __attribute__ ((aligned (64)));
   uint32_t hash[16*4] __attribute__ ((aligned (32)));
   uint32_t lane_hash[8] __attribute__ ((aligned (32)));
   uint32_t *hash7 = &(hash[25]);   // 3*8+1
   uint32_t *pdata = work->data;
   uint32_t *ptarget = work->target;
   uint32_t n = pdata[19];
   const uint32_t first_nonce = pdata[19];
   __m256i  *noncev = (__m256i*)vdata + 9;   // aligned
   const uint32_t Htarg = ptarget[7];
   const int thr_id = mythr->id;
   const bool bench = opt_benchmark;

   mm256_bswap32_intrlv80_4x64( vdata, pdata );
   *noncev = mm256_intrlv_blend_32(
                _mm256_set_epi32( n+3, 0, n+2, 0, n+1, 0, n, 0 ), *noncev );
   do {
      keccakhash_4way( hash, vdata );

      for ( int lane = 0; lane < 4; lane++ )
      if unlikely( hash7[ lane<<1 ] <= Htarg && !bench )
      {
          extr_lane_4x64( lane_hash, hash, lane, 256 );
          if ( valid_hash( lane_hash, ptarget ))
          {
              pdata[19] = bswap_32( n + lane );
              submit_solution( work, lane_hash, mythr );
          }
      }
      *noncev = _mm256_add_epi32( *noncev,
                                  _mm256_set1_epi64x( 0x0000000400000000 ) );
      n += 4;
   } while ( (n < max_nonce-4) && !work_restart[thr_id].restart);
   pdata[19] = n;
   *hashes_done = n - first_nonce + 1;
   return 0;
}

#endif