45 lines
907 B
C
45 lines
907 B
C
//---
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// gint:defs:util - Various utility macros
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//---
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#ifndef GINT_DEFS_UTIL
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#define GINT_DEFS_UTIL
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/* synco instruction (in a form compatible with sh3eb-elf) */
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#define synco() __asm__ volatile (".word 0x00ab":::"memory")
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/* min(), max() (without double evaluation) */
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#define min(a, b) ({ \
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__auto_type _a = (a); \
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__auto_type _b = (b); \
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_a < _b ? _a : _b; \
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})
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#define max(a, b) ({ \
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__auto_type _a = (a); \
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__auto_type _b = (b); \
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_a > _b ? _a : _b; \
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})
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/* sgn() (without double evaluation) */
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#define sgn(s) ({ \
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__auto_type _s = (s); \
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_s < 0 ? -1 : \
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_s > 0 ? +1 : \
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0; \
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})
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/* abs() (without double evaluation) */
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#define abs(s) ({ \
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__auto_type _s = (s); \
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_s < 0 ? -s : s; \
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})
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/* swap() - exchange two variables of the same type */
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#define swap(a, b) ({ \
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__auto_type _tmp = (a); \
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(a) = (b); \
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(b) = _tmp; \
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})
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#endif /* GINT_DEFS_UTIL */
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