From 95c5bddc9fbfda12220124dbf13750f97bae4e1d Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 3 Apr 2023 17:23:11 +0200
Subject: [PATCH 191/191] x86_64: Fix asm constraints in feraiseexcept (bug
 30305)

The divss instruction clobbers its first argument, and the constraints
need to reflect that.  Fortunately, with GCC 12, generated code does
not actually change, so there is no externally visible bug.

Suggested-by: Jakub Jelinek <jakub@redhat.com>
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
(cherry picked from commit 5d1ccdda7b0c625751661d50977f3dfbc73f8eae)
---
 NEWS                             | 1 +
 sysdeps/x86_64/fpu/fraiseexcpt.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index bbe611c5008c..47690c39121d 100644
--- a/NEWS
+++ b/NEWS
@@ -56,6 +56,7 @@ The following bugs are resolved with this release:
   [29951] time: Set daylight to 1 for matching DST/offset change
   [30053] time: strftime %s returns -1 after 2038 on 32 bits systems
   [30151] gshadow: Matching sgetsgent, sgetsgent_r ERANGE handling
+  [30305] x86_64: Fix asm constraints in feraiseexcept
 
 Version 2.36
 
diff --git a/sysdeps/x86_64/fpu/fraiseexcpt.c b/sysdeps/x86_64/fpu/fraiseexcpt.c
index 864f4777a26d..23446ff4acd9 100644
--- a/sysdeps/x86_64/fpu/fraiseexcpt.c
+++ b/sysdeps/x86_64/fpu/fraiseexcpt.c
@@ -33,7 +33,7 @@ __feraiseexcept (int excepts)
       /* One example of an invalid operation is 0.0 / 0.0.  */
       float f = 0.0;
 
-      __asm__ __volatile__ ("divss %0, %0 " : : "x" (f));
+      __asm__ __volatile__ ("divss %0, %0 " : "+x" (f));
       (void) &f;
     }
 
@@ -43,7 +43,7 @@ __feraiseexcept (int excepts)
       float f = 1.0;
       float g = 0.0;
 
-      __asm__ __volatile__ ("divss %1, %0" : : "x" (f), "x" (g));
+      __asm__ __volatile__ ("divss %1, %0" : "+x" (f) : "x" (g));
       (void) &f;
     }
 
-- 
2.40.0