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commit 80b24b86548eee3d96130a48e760d1d6c2e0c587
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Mon Dec 20 15:00:24 2021 -0800
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math: Properly cast X_TLOSS to float [BZ #28713]
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Add
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#define AS_FLOAT_CONSTANT_1(x) x##f
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#define AS_FLOAT_CONSTANT(x) AS_FLOAT_CONSTANT_1(x)
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to cast X_TLOSS to float at compile-time to fix:
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FAIL: math/test-float-j0
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FAIL: math/test-float-jn
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FAIL: math/test-float-y0
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FAIL: math/test-float-y1
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FAIL: math/test-float-yn
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FAIL: math/test-float32-j0
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FAIL: math/test-float32-jn
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FAIL: math/test-float32-y0
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FAIL: math/test-float32-y1
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FAIL: math/test-float32-yn
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when compiling with GCC 12.
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Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
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(cherry picked from commit 6e30181b4a3ab6c56da0378b65f4d60504982300)
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diff --git a/math/math-svid-compat.h b/math/math-svid-compat.h
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index 5c18cb1b039cb3be..876cadde4084dab0 100644
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--- a/math/math-svid-compat.h
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+++ b/math/math-svid-compat.h
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@@ -49,6 +49,8 @@ extern int matherr (struct exception *__exc);
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extern int __matherr (struct exception *__exc);
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#define X_TLOSS 1.41484755040568800000e+16
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+#define AS_FLOAT_CONSTANT_1(x) x##f
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+#define AS_FLOAT_CONSTANT(x) AS_FLOAT_CONSTANT_1(x)
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/* Types of exceptions in the `type' field. */
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#define DOMAIN 1
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diff --git a/math/w_j0f_compat.c b/math/w_j0f_compat.c
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index a4882eadb33853b2..f35a55219f7baa78 100644
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--- a/math/w_j0f_compat.c
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+++ b/math/w_j0f_compat.c
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@@ -28,7 +28,8 @@
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float
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__j0f (float x)
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{
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- if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
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+ if (__builtin_expect (isgreater (fabsf (x),
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+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
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/* j0(|x|>X_TLOSS) */
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return __kernel_standard_f (x, x, 134);
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@@ -43,7 +44,7 @@ float
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__y0f (float x)
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{
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if (__builtin_expect (islessequal (x, 0.0f)
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- || isgreater (x, (float) X_TLOSS), 0)
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+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_)
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{
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if (x < 0.0f)
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diff --git a/math/w_j1f_compat.c b/math/w_j1f_compat.c
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index f2ec7b327d2bc90a..c5e3ccd035031799 100644
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--- a/math/w_j1f_compat.c
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+++ b/math/w_j1f_compat.c
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@@ -28,7 +28,8 @@
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float
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__j1f (float x)
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{
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- if (__builtin_expect (isgreater (fabsf (x), X_TLOSS), 0)
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+ if (__builtin_expect (isgreater (fabsf (x),
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+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
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/* j1(|x|>X_TLOSS) */
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return __kernel_standard_f (x, x, 136);
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@@ -43,7 +44,7 @@ float
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__y1f (float x)
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{
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if (__builtin_expect (islessequal (x, 0.0f)
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- || isgreater (x, (float) X_TLOSS), 0)
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+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_)
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{
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if (x < 0.0f)
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diff --git a/math/w_jnf_compat.c b/math/w_jnf_compat.c
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index fb6e5060096fb070..925ccc4cd0988a8f 100644
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--- a/math/w_jnf_compat.c
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+++ b/math/w_jnf_compat.c
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@@ -28,7 +28,8 @@
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float
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__jnf (int n, float x)
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{
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- if (__builtin_expect (isgreater (fabsf (x), (float) X_TLOSS), 0)
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+ if (__builtin_expect (isgreater (fabsf (x),
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+ AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_ && _LIB_VERSION != _POSIX_)
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/* jn(n,|x|>X_TLOSS) */
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return __kernel_standard_f (n, x, 138);
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@@ -43,7 +44,7 @@ float
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__ynf (int n, float x)
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{
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if (__builtin_expect (islessequal (x, 0.0f)
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- || isgreater (x, (float) X_TLOSS), 0)
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+ || isgreater (x, AS_FLOAT_CONSTANT (X_TLOSS)), 0)
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&& _LIB_VERSION != _IEEE_)
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{
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if (x < 0.0f)
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