[glibc/release/2.34/master] s_sincosf.h: Change pio4 type to float [BZ #28713]

[glibc/release/2.34/master] s_sincosf.h: Change pio4 type to float [BZ #28713]

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c5c666f34939d4bbf73aac8b753ab39621ebf33c

commit c5c666f34939d4bbf73aac8b753ab39621ebf33c
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Mon Dec 20 14:37:26 2021 -0800

    s_sincosf.h: Change pio4 type to float [BZ #28713]
    
    s_cosf.c and s_sinf.c have
    
      if (abstop12 (y) < abstop12 (pio4))
    
    where abstop12 takes a float argument, but pio4 is static const double.
    pio4 is used only in calls to abstop12 and never in arithmetic.  Apply
    
    -static const double pio4 = 0x1.921FB54442D18p-1;
    +static const float pio4 = 0x1.921FB6p-1f;
    
    to fix:
    
    FAIL: math/test-float-cos
    FAIL: math/test-float-sin
    FAIL: math/test-float-sincos
    FAIL: math/test-float32-cos
    FAIL: math/test-float32-sin
    FAIL: math/test-float32-sincos
    
    when compiling with GCC 12.
    
    Reviewed-by: Paul Zimmermann <Paul.Zimmermann@inria.fr>
    (cherry picked from commit d3e4f5a1014db09ff1c62c6506f92cba469e193d)

Diff:
---
 sysdeps/ieee754/flt-32/s_sincosf.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/ieee754/flt-32/s_sincosf.h b/sysdeps/ieee754/flt-32/s_sincosf.h
index 125ab7f846..372d8542c2 100644
--- a/sysdeps/ieee754/flt-32/s_sincosf.h
+++ b/sysdeps/ieee754/flt-32/s_sincosf.h
@@ -24,7 +24,7 @@
 /* 2PI * 2^-64.  */
 static const double pi63 = 0x1.921FB54442D18p-62;
 /* PI / 4.  */
-static const double pio4 = 0x1.921FB54442D18p-1;
+static const float pio4 = 0x1.921FB6p-1f;
 
 /* Polynomial data (the cosine polynomial is negated in the 2nd entry).  */
 extern const sincos_t __sincosf_table[2] attribute_hidden;