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Add a system-wide BIT_N macro, implemented via an LUT on SH, and use it in the TAGCACHE_IS_* macros in place of per-set LUTs, removing duplication of data between those LUTs and the mask values used on other targets.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21195 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2009-06-06 00:00:58 +00:00
parent fe72c890a7
commit de7c5711c5
5 changed files with 29 additions and 31 deletions
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7
firmware/target/sh/system-target.h
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@ -126,4 +126,11 @@ static inline uint32_t swap_odd_even32(uint32_t value)
return value;
}
extern const unsigned bit_n_table[32];
#define BIT_N(n) ( \
__builtin_constant_p(n) \
? (1LU << (n)) \
: bit_n_table[n] \
)
#endif /* SYSTEM_TARGET_H */