Implement C23 cospi

C23 adds various <math.h> function families originally defined in TS
18661-4.  Add the cospi functions (cos(pi*x)).

Tested for x86_64 and x86, and with build-many-glibcs.py.

1 files changed, 91 insertions, 0 deletions

diff --git a/math/auto-libm-test-in b/math/auto-libm-test-in
index b570e88e78..04fe31b863 100644
--- a/math/auto-libm-test-in
+++ b/math/auto-libm-test-in
@@ -4463,6 +4463,97 @@ cos 0x2.3c6ef4p-12
 # the next value generates larger error bounds on x86_64 (binary128)
 cos 0xe.6672d458b05edf50af4fab1a42p+40
 
+cospi 0
+cospi -0
+cospi min
+cospi -min
+cospi min_subnorm
+cospi -min_subnorm
+cospi max
+cospi -max
+cospi 1
+cospi -1
+cospi 2
+cospi -2
+cospi 3
+cospi -3
+cospi 0.1
+cospi -0.1
+cospi 0.2
+cospi -0.2
+cospi 0.3
+cospi -0.3
+cospi 0.4
+cospi -0.4
+cospi 0.5
+cospi -0.5
+cospi 0.6
+cospi -0.6
+cospi 0.7
+cospi -0.7
+cospi 0.8
+cospi -0.8
+cospi 0.9
+cospi -0.9
+cospi 1.1
+cospi -1.1
+cospi 1.2
+cospi -1.2
+cospi 1.3
+cospi -1.3
+cospi 1.4
+cospi -1.4
+cospi 1.5
+cospi -1.5
+cospi 2.5
+cospi -2.5
+cospi 3.5
+cospi -3.5
+cospi 4.5
+cospi -4.5
+cospi 0.24
+cospi -0.24
+cospi 0.49
+cospi -0.49
+cospi 0.51
+cospi -0.51
+cospi 0.76
+cospi -0.76
+cospi 1.24
+cospi -1.24
+cospi 1.49
+cospi -1.49
+cospi 1.51
+cospi -1.51
+cospi 1.76
+cospi -1.76
+cospi 100.24
+cospi -100.24
+cospi 100.49
+cospi -100.49
+cospi 100.51
+cospi -100.51
+cospi 100.76
+cospi -100.76
+cospi 1234.56
+cospi -1234.56
+cospi 0x1fffff.6p0
+cospi -0x1fffff.6p0
+cospi 0x1fffff.ap0
+cospi -0x1fffff.ap0
+cospi 0x3ffffffffffff.6p0
+cospi -0x3ffffffffffff.6p0
+cospi 0x3ffffffffffff.ap0
+cospi -0x3ffffffffffff.ap0
+cospi 0x1fffffffffffffff.6p0
+cospi -0x1fffffffffffffff.6p0
+cospi 0x1fffffffffffffff.ap0
+cospi -0x1fffffffffffffff.ap0
+cospi 0x3fffffffffffffffffffffffffff.6p0
+cospi -0x3fffffffffffffffffffffffffff.6p0
+cospi 0x3fffffffffffffffffffffffffff.ap0
+cospi -0x3fffffffffffffffffffffffffff.ap0
+
 cosh 0
 cosh -0
 cosh 0.75