mirror of
https://github.com/RaySollium99/picodrive.git
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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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#define DRC_TCACHE_SIZE (4*1024*1024)
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extern u8 *tcache;
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void drc_cmn_init(void);
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void drc_cmn_cleanup(void);
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#define BITMASK1(v0) (1 << (v0))
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#define BITMASK2(v0,v1) ((1 << (v0)) | (1 << (v1)))
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#define BITMASK3(v0,v1,v2) (BITMASK2(v0,v1) | (1 << (v2)))
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#define BITMASK4(v0,v1,v2,v3) (BITMASK3(v0,v1,v2) | (1 << (v3)))
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#define BITMASK5(v0,v1,v2,v3,v4) (BITMASK4(v0,v1,v2,v3) | (1 << (v4)))
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#define BITMASK6(v0,v1,v2,v3,v4,v5) (BITMASK5(v0,v1,v2,v3,v4) | (1 << (v5)))
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#define BITRANGE(v0,v1) (BITMASK1(v1+1)-BITMASK1(v0)) // set with v0..v1
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// binary search approach, since we don't have CLZ on ARM920T
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#define FOR_ALL_BITS_SET_DO(mask, bit, code) { \
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u32 __mask = mask; \
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for (bit = 31; bit >= 0 && mask; bit--, __mask <<= 1) { \
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if (!(__mask & (0xffff << 16))) \
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bit -= 16, __mask <<= 16; \
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if (!(__mask & (0xff << 24))) \
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bit -= 8, __mask <<= 8; \
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if (!(__mask & (0xf << 28))) \
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bit -= 4, __mask <<= 4; \
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if (!(__mask & (0x3 << 30))) \
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bit -= 2, __mask <<= 2; \
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if (!(__mask & (0x1 << 31))) \
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bit -= 1, __mask <<= 1; \
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if (__mask & (0x1 << 31)) { \
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code; \
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} \
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} \
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}
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// inspired by https://graphics.stanford.edu/~seander/bithacks.html
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static inline int count_bits(unsigned val)
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{
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val = val - ((val >> 1) & 0x55555555);
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val = (val & 0x33333333) + ((val >> 2) & 0x33333333);
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return (((val + (val >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
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}
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