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math: numbers: only define SOF gcd() if not already defined #10429

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Merged
kv2019i merged 1 commit into from
Dec 11, 2025
Merged

math: numbers: only define SOF gcd() if not already defined #10429

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4 changes: 4 additions & 0 deletions src/include/sof/math/numbers.h
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Expand Up @@ -36,7 +36,11 @@
__a > 0 ? 1 : 0; \
})

/* Zephyr added gcd() in 2025/Nov to sys/util.h */
#ifndef gcd
#define USE_SOF_GCD 1
int gcd(int a, int b); /* Calculate greatest common divisor for a and b */
#endif

/* This is a divide function that returns ceil of the quotient.
* E.g. ceil_divide(9, 3) returns 3, ceil_divide(10, 3) returns 4.
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4 changes: 4 additions & 0 deletions src/math/numbers.c
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Expand Up @@ -15,6 +15,9 @@
#include <rtos/symbol.h>
#include <stdint.h>

/* see numbers.h */
#ifdef USE_SOF_GCD

/* This function returns the greatest common divisor of two numbers
* If both parameters are 0, gcd(0, 0) returns 0
* If first parameters is 0 or second parameter is 0, gcd(0, b) returns b
Expand Down Expand Up @@ -74,6 +77,7 @@ int gcd(int a, int b)
return a << k;
}
EXPORT_SYMBOL(gcd);
#endif /* USE_SOF_GCD */

#if CONFIG_NUMBERS_VECTOR_FIND

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