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/flt-32/s_llrintf.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

(limited to 'sysdeps/ieee754/flt-32')

diff --git a/sysdeps/ieee754/flt-32/s_llrintf.c b/sysdeps/ieee754/flt-32/s_llrintf.c
index 226b8261d3..79e3c385d1 100644
--- a/sysdeps/ieee754/flt-32/s_llrintf.c
+++ b/sysdeps/ieee754/flt-32/s_llrintf.c
@@ -25,17 +25,22 @@
 #include <math_private.h>
 #include <libm-alias-float.h>
 #include <fix-fp-int-convert-overflow.h>
-
-static const float two23[2] =
-{
-  8.3886080000e+06, /* 0x4B000000 */
- -8.3886080000e+06, /* 0xCB000000 */
-};
+#include <math-use-builtins.h>
 
 
 long long int
 __llrintf (float x)
 {
+#if USE_LLRINTF_BUILTIN
+  return __builtin_llrintf (x);
+#else
+  /* Use generic implementation.  */
+  static const float two23[2] =
+  {
+    8.3886080000e+06, /* 0x4B000000 */
+   -8.3886080000e+06, /* 0xCB000000 */
+  };
+
   int32_t j0;
   uint32_t i0;
   float w;
@@ -82,6 +87,7 @@ __llrintf (float x)
     }
 
   return sx ? -result : result;
+#endif /* ! USE_LLRINTF_BUILTIN  */
 }
 
 libm_alias_float (__llrint, llrint)
-- 
cgit 1.4.1