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* [glibc] arm: Remove __builtin_arm_uqsub8 usage on string-fza.h
@ 2023-03-02 20:19 Adhemerval Zanella
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From: Adhemerval Zanella @ 2023-03-02 20:19 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3a4781c16c680a2c5ab4585b4696f781898ab610
commit 3a4781c16c680a2c5ab4585b4696f781898ab610
Author: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Date: Tue Feb 28 15:23:25 2023 -0300
arm: Remove __builtin_arm_uqsub8 usage on string-fza.h
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>
Diff:
---
sysdeps/arm/armv6t2/string-fza.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/sysdeps/arm/armv6t2/string-fza.h b/sysdeps/arm/armv6t2/string-fza.h
index d85ce86434..fb75011991 100644
--- a/sysdeps/arm/armv6t2/string-fza.h
+++ b/sysdeps/arm/armv6t2/string-fza.h
@@ -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. */
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2023-03-02 20:19 [glibc] arm: Remove __builtin_arm_uqsub8 usage on string-fza.h Adhemerval Zanella
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