blis/addon/aocl_gemm/aocl_gemm_u8s4s32os32_utils.c

/*

   BLIS
   An object-based framework for developing high-performance BLAS-like
   libraries.

   Copyright (C) 2024, Advanced Micro Devices, Inc. All rights reserved.

   Redistribution and use in source and binary forms, with or without
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   met:
    - Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    - Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    - Neither the name(s) of the copyright holder(s) nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#include "blis.h"
#include "aocl_gemm_interface_apis.h"
#include "lpgemm_types.h"
#include "lpgemm_config.h"
#include "lpgemm_utils.h"
#include "lpgemm_reorder.h"

AOCL_GEMM_GET_REORDER_BUF_SIZE(u8s4s32os32)
{
	if ( ( k <= 0 ) || ( n <= 0 ) )
	{
		return 0; // Error.
	}

	if ( ( order != 'r' ) && ( order != 'R' ) )
	{
		return 0; //Only row major suppored for int4 reordering.
	}

	// Check if avx512_vnni ISA is supported, lpgemm matmul only works with it.
	if ( bli_cpuid_is_avx512vnni_supported() == FALSE )
	{
		bli_print_msg(" AVX512_VNNI ISA not supported by processor, "
				"cannot perform int4 reordering.", __FILE__, __LINE__ );
		return 0; // Error.
	}

	/* Initialize BLIS. */
	bli_init_auto();

	// Set MC, NC, KC, NR, MR.
	aocl_lpgemm_init_global_cntx();

	AOCL_MATRIX_TYPE input_mat_type;
	bli_param_map_char_to_lpmat_type( mat_type, &input_mat_type );

	if ( input_mat_type == A_MATRIX )
	{
		return 0; // A reorder not supported.
	}

	// Extra space since packing does width in multiples of 16. The vnni
	// instruction can be used as long as at least one zmm register can be fully
	// loaded; and since k_dim needs to be at least 4, having n_dim at least 16
	// should give 4x16=64 elements, enough for 1 zmm register.The padding is
	// not rounded to NR (=64), since that would result in memory wastage.
#ifdef BLIS_KERNELS_ZEN4
	dim_t n_reorder;
	if( n == 1 )
	{
		n_reorder = 1;
	}
	else
	{
		n_reorder = make_multiple_of_n( n, 16 );
	}

	// Extra space since packing does length in multiples of 4.
	dim_t k_reorder;
	if( n == 1 )
	{
		k_reorder = k;
	}
	else
	{
		k_reorder = make_multiple_of_n( k, 4 );
	}
#else
	dim_t n_reorder = make_multiple_of_n( n, 16 );
	dim_t k_reorder = make_multiple_of_n( k, 4 );
#endif

	siz_t size_req = sizeof( int8_t ) * k_reorder * n_reorder;

	return size_req;
}

AOCL_GEMM_REORDER(int8_t,u8s4s32os32)
{
	trans_t blis_trans;
	/* Map BLAS chars to their corresponding BLIS enumerated type value. */
	bli_param_map_netlib_to_blis_trans(trans, &blis_trans);

	// Transpose not supported for int4 reordering.
 	if ( ( input_buf_addr == NULL ) || ( reorder_buf_addr == NULL ) ||
	     ( k <= 0 ) || ( n <= 0 ) || ( bli_is_trans( blis_trans ) ) ||
		 ( bli_is_notrans( blis_trans ) && ( ldb < n ) ) )
	{
		return; // Error.
	}

	if ( ( order != 'r' ) && ( order != 'R' ) )
	{
		bli_print_msg(" Only row major int4 matrix reordering supported.",
						__FILE__, __LINE__ );
		return; //Only row major suppored for int4 reordering.
	}

	inc_t rs_b = ldb;
	inc_t cs_b = 1;

	// Check if avx512_vnni ISA is supported, lpgemm matmul only works with it.
	if ( bli_cpuid_is_avx512vnni_supported() == FALSE )
	{
		bli_print_msg(" AVX512_VNNI ISA not supported by processor, "
				"cannot perform int4 reordering.", __FILE__, __LINE__ );
		return; // Error.
	}

	/* Initialize BLIS. */
	bli_init_auto();

	// Set MC, NC, KC, NR, MR.
	aocl_lpgemm_init_global_cntx();

	AOCL_MATRIX_TYPE input_mat_type;
	bli_param_map_char_to_lpmat_type( mat_type, &input_mat_type );

	if ( input_mat_type == A_MATRIX )
	{
		bli_print_msg(" Only int4 B matrix reordering supported.",
						__FILE__, __LINE__ );
		return; // A reorder not supported.
	}

#ifdef BLIS_KERNELS_ZEN4
	if( n == 1 )
	{
		for ( dim_t ii = 0; ii < k; ++ii )
		{
			int8_t lo_val;
			dim_t b_inc = ii * rs_b;
			// Even index will have data at low 4 bits, and odd at hi 4 bits.
			if ( ( b_inc % 2 ) != 0 )
			{
				lo_val = ( input_buf_addr[( b_inc / 2 )] >> 4 ) & 0x0F;
			}
			else
			{
				lo_val = input_buf_addr[( b_inc / 2 )] & 0x0F;
			}

			// Signed scale.
			if ( lo_val & 0x08 )
			{
				lo_val = lo_val | 0xF0;
			}
			reorder_buf_addr[ii] = lo_val;
		}
		return;
	}
#endif

	// Initialize a local runtime with global settings if necessary. Note
	// that in the case that a runtime is passed in, we make a local copy.
	rntm_t rntm_g;
	bli_rntm_init_from_global( &rntm_g );
	bli_pba_rntm_set_pba( &rntm_g );

	lpgemm_cntx_t* lcntx_g = lpgemm_get_global_cntx_obj( U8S4S32OS32 );

	// Create dummy b_reorder obj.
	lpgemm_obj_t b_reorder;
	b_reorder.storage.aligned_buffer = reorder_buf_addr;

	// Create dummy original b obj;
	lpgemm_obj_t b;
	b.storage.aligned_buffer = ( void* )input_buf_addr;
	b.rs = rs_b;
	b.cs = cs_b;
	b.width = n;
	b.length = k;

	reorderb_nr64_u8s4s32o32( &b, &b_reorder, &rntm_g, lcntx_g );
}