From a1981ecbfd4aec84dea26936d91c8ed9164f8b13 Mon Sep 17 00:00:00 2001
From: Xiaolin Tang <tangxiaolin@loongson.cn>
Date: Wed, 23 Nov 2022 11:44:58 +0800
Subject: Use GCC builtins for llrint functions if desired.

This patch is using the corresponding GCC builtin for llrintf, llrint,
llrintl and llrintf128 if the USE_FUNCTION_BUILTIN macros are defined to one
in math-use-builtins-function.h.

Co-Authored-By: Xi Ruoyao <xry111@xry111.site>
---
 sysdeps/ieee754/ldbl-128/s_llrintl.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

(limited to 'sysdeps/ieee754/ldbl-128')

diff --git a/sysdeps/ieee754/ldbl-128/s_llrintl.c b/sysdeps/ieee754/ldbl-128/s_llrintl.c
index 79d3937..3a5635d 100644
--- a/sysdeps/ieee754/ldbl-128/s_llrintl.c
+++ b/sysdeps/ieee754/ldbl-128/s_llrintl.c
@@ -24,16 +24,22 @@
 #include <math_private.h>
 #include <libm-alias-ldouble.h>
 #include <fix-fp-int-convert-overflow.h>
+#include <math-use-builtins.h>
 
-static const _Float128 two112[2] =
-{
-  L(5.19229685853482762853049632922009600E+33), /* 0x406F000000000000, 0 */
- L(-5.19229685853482762853049632922009600E+33)  /* 0xC06F000000000000, 0 */
-};
 
 long long int
 __llrintl (_Float128 x)
 {
+#if USE_LLRINTL_BUILTIN
+  return __builtin_round (x);
+#else
+  /* Use generic implementation.  */
+  static const _Float128 two112[2] =
+  {
+    L(5.19229685853482762853049632922009600E+33), /* 0x406F000000000000, 0 */
+   L(-5.19229685853482762853049632922009600E+33)  /* 0xC06F000000000000, 0 */
+  };
+
   int32_t j0;
   uint64_t i0,i1;
   _Float128 w;
@@ -102,6 +108,7 @@ __llrintl (_Float128 x)
     }
 
   return sx ? -result : result;
+#endif /* ! USE_LLRINTL_BUILTIN  */
 }
 
 libm_alias_ldouble (__llrint, llrint)
-- 
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