From 97830304bb477f18b67b7bc11989fb3357da443e Mon Sep 17 00:00:00 2001 From: Adhemerval Zanella Date: Mon, 20 Feb 2023 13:46:36 -0300 Subject: arm: Support gcc older than 10 for find_zero_all __builtin_arm_uqsub8 is only available on gcc newer or equal than 10. Checked on arm-linux-gnueabihf built with gcc 9. Reviewed-by: Richard Henderson --- sysdeps/arm/armv6t2/string-fza.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'sysdeps/arm/armv6t2') diff --git a/sysdeps/arm/armv6t2/string-fza.h b/sysdeps/arm/armv6t2/string-fza.h index 76274ccca7..d85ce86434 100644 --- a/sysdeps/arm/armv6t2/string-fza.h +++ b/sysdeps/arm/armv6t2/string-fza.h @@ -33,7 +33,13 @@ 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. */ -- cgit 1.4.1