fd570665ce
Add the following useful macros: * Absolute Value Macro * Taking ceiling of (a / b) * Check if value x is a power of 2 or not Change-Id: I4e9a326aea3cdd963f13548d1fb63331a57d84b1 Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com> Reviewed-on: http://review.coreboot.org/6198 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
29 lines
819 B
C
29 lines
819 B
C
#ifndef STDLIB_H
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#define STDLIB_H
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#include <stddef.h>
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1UL)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define ALIGN_UP(x,a) ALIGN((x),(a))
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#define ALIGN_DOWN(x,a) ((x) & ~((typeof(x))(a)-1UL))
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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#define ABS(a) (((a) < 0) ? (-(a)) : (a))
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#define CEIL_DIV(a, b) (((a) + (b) - 1) / (b))
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#define IS_POWER_OF_2(x) (((x) & ((x) - 1)) == 0)
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#define min(a,b) MIN((a),(b))
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#define max(a,b) MAX((a),(b))
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#if !defined(__PRE_RAM__)
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void *memalign(size_t boundary, size_t size);
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void *malloc(size_t size);
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/* We never free memory */
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static inline void free(void *ptr) {}
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#endif
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#endif /* STDLIB_H */
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