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* [glibc/release/2.34/master] math: Properly cast X_TLOSS to float [BZ #28713]
@ 2023-01-12 6:21 Florian Weimer
0 siblings, 0 replies; only message in thread
From: Florian Weimer @ 2023-01-12 6:21 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=80b24b86548eee3d96130a48e760d1d6c2e0c587
commit 80b24b86548eee3d96130a48e760d1d6c2e0c587
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Dec 20 15:00:24 2021 -0800
math: Properly cast X_TLOSS to float [BZ #28713]
Add
#define AS_FLOAT_CONSTANT_1(x) x##f
#define AS_FLOAT_CONSTANT(x) AS_FLOAT_CONSTANT_1(x)
to cast X_TLOSS to float at compile-time to fix:
FAIL: math/test-float-j0
FAIL: math/test-float-jn
FAIL: math/test-float-y0
FAIL: math/test-float-y1
FAIL: math/test-float-yn
FAIL: math/test-float32-j0
FAIL: math/test-float32-jn
FAIL: math/test-float32-y0
FAIL: math/test-float32-y1
FAIL: math/test-float32-yn
when compiling with GCC 12.
Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
(cherry picked from commit 6e30181b4a3ab6c56da0378b65f4d60504982300)
Diff:
---
math/math-svid-compat.h | 2 ++
math/w_j0f_compat.c | 5 +++--
math/w_j1f_compat.c | 5 +++--
math/w_jnf_compat.c | 5 +++--
4 files changed, 11 insertions(+), 6 deletions(-)
diff --git a/math/math-svid-compat.h b/math/math-svid-compat.h
index 5c18cb1b03..876cadde40 100644
--- a/math/math-svid-compat.h
+++ b/math/math-svid-compat.h
@@ -49,6 +49,8 @@ extern int matherr (struct exception *__exc);
extern int __matherr (struct exception *__exc);
#define X_TLOSS 1.41484755040568800000e+16
+#define AS_FLOAT_CONSTANT_1(x) x##f
+#define AS_FLOAT_CONSTANT(x) AS_FLOAT_CONSTANT_1(x)
/* Types of exceptions in the `type' field. */
#define DOMAIN 1
diff --git a/math/w_j0f_compat.c b/math/w_j0f_compat.c
index a4882eadb3..f35a55219f 100644
--- a/math/w_j0f_compat.c
+++ b/math/w_j0f_compat.c
@@ -28,7 +28,8 @@
float
__j0f (float x)
{
- if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
+ if (__builtin_expect (isgreater (fabsf (x),
+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
/* j0(|x|>X_TLOSS) */
return __kernel_standard_f (x, x, 134);
@@ -43,7 +44,7 @@ float
__y0f (float x)
{
if (__builtin_expect (islessequal (x, 0.0f)
- || isgreater (x, (float) X_TLOSS), 0)
+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_)
{
if (x < 0.0f)
diff --git a/math/w_j1f_compat.c b/math/w_j1f_compat.c
index f2ec7b327d..c5e3ccd035 100644
--- a/math/w_j1f_compat.c
+++ b/math/w_j1f_compat.c
@@ -28,7 +28,8 @@
float
__j1f (float x)
{
- if (__builtin_expect (isgreater (fabsf (x), X_TLOSS), 0)
+ if (__builtin_expect (isgreater (fabsf (x),
+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
/* j1(|x|>X_TLOSS) */
return __kernel_standard_f (x, x, 136);
@@ -43,7 +44,7 @@ float
__y1f (float x)
{
if (__builtin_expect (islessequal (x, 0.0f)
- || isgreater (x, (float) X_TLOSS), 0)
+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_)
{
if (x < 0.0f)
diff --git a/math/w_jnf_compat.c b/math/w_jnf_compat.c
index fb6e506009..925ccc4cd0 100644
--- a/math/w_jnf_compat.c
+++ b/math/w_jnf_compat.c
@@ -28,7 +28,8 @@
float
__jnf (int n, float x)
{
- if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
+ if (__builtin_expect (isgreater (fabsf (x),
+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
/* jn(n,|x|>X_TLOSS) */
return __kernel_standard_f (n, x, 138);
@@ -43,7 +44,7 @@ float
__ynf (int n, float x)
{
if (__builtin_expect (islessequal (x, 0.0f)
- || isgreater (x, (float) X_TLOSS), 0)
+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
&& _LIB_VERSION != _IEEE_)
{
if (x < 0.0f)
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