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From: H.J. Lu <hjl@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc] math: Properly cast X_TLOSS to float [BZ #28713] Date: Thu, 23 Dec 2021 14:46:01 +0000 (GMT) [thread overview] Message-ID: <20211223144601.81F263858418@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6e30181b4a3ab6c56da0378b65f4d60504982300 commit 6e30181b4a3ab6c56da0378b65f4d60504982300 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> 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 d375f3bfb0..3257533596 100644 --- a/math/w_j0f_compat.c +++ b/math/w_j0f_compat.c @@ -27,7 +27,8 @@ 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); @@ -42,7 +43,7 @@ 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 81e56b771e..025ed3ab46 100644 --- a/math/w_j1f_compat.c +++ b/math/w_j1f_compat.c @@ -27,7 +27,8 @@ 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); @@ -42,7 +43,7 @@ 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 296e631566..ee9e80c494 100644 --- a/math/w_jnf_compat.c +++ b/math/w_jnf_compat.c @@ -27,7 +27,8 @@ 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); @@ -42,7 +43,7 @@ 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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