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From: Aurelien Jarno <aurel32@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/release/2.36/master] Fix BZ #29463 in the ibm128 implementation of y1l too
Date: Mon, 24 Oct 2022 18:57:14 +0000 (GMT)	[thread overview]
Message-ID: <20221024185715.B7EA0385840A@sourceware.org> (raw)

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b357157361117182c7a68c90fda7ba431b64442c

commit b357157361117182c7a68c90fda7ba431b64442c
Author: Michael Hudson-Doyle <michael.hudson@canonical.com>
Date:   Mon Aug 22 14:05:04 2022 +1200

    Fix BZ #29463 in the ibm128 implementation of y1l too
    
    Avoid moving code across SET_RESTORE_ROUNDL in order to fix
    [BZ #29463].
    
    Tested-by: Aurelien Jarno <aurelien@aurel32.net>
    Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
    Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
    (cherry picked from commit b6e37b7805b0182c3e25cdab39ebf5f001c04d05)

Diff:
---
 sysdeps/ieee754/ldbl-128ibm/e_j1l.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sysdeps/ieee754/ldbl-128ibm/e_j1l.c b/sysdeps/ieee754/ldbl-128ibm/e_j1l.c
index f85ba94466..0a5fe68342 100644
--- a/sysdeps/ieee754/ldbl-128ibm/e_j1l.c
+++ b/sysdeps/ieee754/ldbl-128ibm/e_j1l.c
@@ -792,10 +792,13 @@ __ieee754_y1l (long double x)
     {
       /* 0 <= x <= 2 */
       SET_RESTORE_ROUNDL (FE_TONEAREST);
+      xx = math_opt_barrier (xx);
+      x = math_opt_barrier (x);
       z = xx * xx;
       p = xx * neval (z, Y0_2N, NY0_2N) / deval (z, Y0_2D, NY0_2D);
       p = -TWOOPI / xx + p;
       p = TWOOPI * __ieee754_logl (x) * __ieee754_j1l (x) + p;
+      math_force_eval (p);
       return p;
     }

                 reply	other threads:[~2022-10-24 18:57 UTC|newest]

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