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arm: Remove __builtin_arm_uqsub8 usage on string-fza.h

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The __builtin_arm_uqsub8 is an internal GCC builtin which might change
in future release (the correct way is to include "arm_acle.h" and use
__uqsub8 ()).  Since not all compilers support it, just use the
inline assembler instead.

Checked on armv7a-linux-gnueabihf.
Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
This commit is contained in:
Adhemerval Zanella Netto 2023-02-28 15:23:25 -03:00 committed by Adhemerval Zanella
parent 90ae3bc393
commit 3a4781c16c
1 changed files with 0 additions and 4 deletions
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4
sysdeps/arm/armv6t2/string-fza.h
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@ -33,13 +33,9 @@ find_zero_all (op_t x)
/* Use unsigned saturated subtraction from 1 in each byte.
That leaves 1 for every byte that was zero. */
op_t ones = repeat_bytes (0x01);
#if __GNUC_PREREQ (10, 0)
return __builtin_arm_uqsub8 (ones, x);
#else
op_t ret;
asm ("uqsub8 %0,%1,%2" : "=r"(ret) : "r"(ones), "r"(x));
return ret;
#endif
}
/* Identify bytes that are equal between X1 and X2. */