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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-02-20 13:46:36 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2023-02-20 16:43:42 -0300
commit97830304bb477f18b67b7bc11989fb3357da443e (patch)
treea76eda4861d3f716ff522b89c25e9fa7e49ac155 /sysdeps/arm
parent3f98a5c027de375ffe34cf036f80bacb9a40a9be (diff)
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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 <richard.henderson@linaro.org>
Diffstat (limited to 'sysdeps/arm')
-rw-r--r--sysdeps/arm/armv6t2/string-fza.h6
1 files changed, 6 insertions, 0 deletions
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.  */