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/*
* Copyright (c) 2013, The Regents of the University of California (Regents).
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the Regents nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
* SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
* OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
* HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*/
#ifndef _BITS_H
#define _BITS_H
#define CONST_POPCOUNT2(x) ((((x) >> 0) & 1) + (((x) >> 1) & 1))
#define CONST_POPCOUNT4(x) (CONST_POPCOUNT2(x) + CONST_POPCOUNT2((x)>>2))
#define CONST_POPCOUNT8(x) (CONST_POPCOUNT4(x) + CONST_POPCOUNT4((x)>>4))
#define CONST_POPCOUNT16(x) (CONST_POPCOUNT8(x) + CONST_POPCOUNT8((x)>>8))
#define CONST_POPCOUNT32(x) (CONST_POPCOUNT16(x) + CONST_POPCOUNT16((x)>>16))
#define CONST_POPCOUNT64(x) (CONST_POPCOUNT32(x) + CONST_POPCOUNT32((x)>>32))
#define CONST_POPCOUNT(x) CONST_POPCOUNT64(x)
#define CONST_CTZ2(x) CONST_POPCOUNT2(((x) & -(x))-1)
#define CONST_CTZ4(x) CONST_POPCOUNT4(((x) & -(x))-1)
#define CONST_CTZ8(x) CONST_POPCOUNT8(((x) & -(x))-1)
#define CONST_CTZ16(x) CONST_POPCOUNT16(((x) & -(x))-1)
#define CONST_CTZ32(x) CONST_POPCOUNT32(((x) & -(x))-1)
#define CONST_CTZ64(x) CONST_POPCOUNT64(((x) & -(x))-1)
#define CONST_CTZ(x) CONST_CTZ64(x)
#define STR(x) XSTR(x)
#define XSTR(x) #x
#if __riscv_xlen == 64
#define SLL32 sllw
#define STORE sd
#define LOAD ld
#define LWU lwu
#define LOG_REGBYTES 3
#else
#define SLL32 sll
#define STORE sw
#define LOAD lw
#define LWU lw
#define LOG_REGBYTES 2
#endif
#define REGBYTES (1 << LOG_REGBYTES)
#endif
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