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39 lines
1.2 KiB
39 lines
1.2 KiB
#ifndef PK_BITS_H
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#define PK_BITS_H
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#define likely(x) __builtin_expect((x), 1)
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#define unlikely(x) __builtin_expect((x), 0)
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#define CONST_POPCOUNT2(x) ((((x) >> 0) & 1) + (((x) >> 1) & 1))
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#define CONST_POPCOUNT4(x) (CONST_POPCOUNT2(x) + CONST_POPCOUNT2((x)>>2))
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#define CONST_POPCOUNT8(x) (CONST_POPCOUNT4(x) + CONST_POPCOUNT4((x)>>4))
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#define CONST_POPCOUNT16(x) (CONST_POPCOUNT8(x) + CONST_POPCOUNT8((x)>>8))
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#define CONST_POPCOUNT32(x) (CONST_POPCOUNT16(x) + CONST_POPCOUNT16((x)>>16))
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#define CONST_POPCOUNT64(x) (CONST_POPCOUNT32(x) + CONST_POPCOUNT32((x)>>32))
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#define CONST_POPCOUNT(x) CONST_POPCOUNT64(x)
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#define CONST_CTZ2(x) CONST_POPCOUNT2(((x) & -(x))-1)
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#define CONST_CTZ4(x) CONST_POPCOUNT4(((x) & -(x))-1)
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#define CONST_CTZ8(x) CONST_POPCOUNT8(((x) & -(x))-1)
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#define CONST_CTZ16(x) CONST_POPCOUNT16(((x) & -(x))-1)
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#define CONST_CTZ32(x) CONST_POPCOUNT32(((x) & -(x))-1)
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#define CONST_CTZ64(x) CONST_POPCOUNT64(((x) & -(x))-1)
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#define CONST_CTZ(x) CONST_CTZ64(x)
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#define STR(x) XSTR(x)
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#define XSTR(x) #x
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#ifdef __riscv64
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# define SLL32 sllw
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# define STORE sd
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# define LOAD ld
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# define LOG_REGBYTES 3
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#else
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# define SLL32 sll
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# define STORE sw
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# define LOAD lw
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# define LOG_REGBYTES 2
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#endif
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#define REGBYTES (1 << LOG_REGBYTES)
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#endif
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