Add _Float64, _Float32x function aliases.

This patch continues filling out TS 18661-3 support by adding *f64 and
*f32x function aliases, supporting _Float64 and _Float32x, as aliases
for double functions.  These types are supported for all glibc
configurations.  The API corresponds exactly to that for _Float128 and
_Float64x.  _Float32 aliases to float functions remain to be added in
subsequent patches to complete this process (then there are a few
miscellaneous functions in TS 18661-3 to implement that aren't simply
versions of existing functions for new types).

The patch enables the feature in bits/floatn-common.h, adds symbol
versions and documentation with updates to ABI baselines, and arranges
for the libm functions for the new types to be tested.  As with the
_Float64x changes there are some x86 ulps updates because of header
inlines not used for the new types (and one other change to the
non-multiarch libm-test-ulps, which I suppose comes from using a
different compiler version / configuration from when it was last
regenerated).

Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.

	* bits/floatn-common.h (__HAVE_FLOAT64): Define to 1.
	(__HAVE_FLOAT32X): Likewise.
	* manual/math.texi (Mathematics): Document support for _Float64
	and _Float32x.
	* math/Makefile (test-types): Add float64 and float32x.
	* math/Versions (GLIBC_2.27): Add _Float64 and _Float32x
	functions.
	* stdlib/Versions (GLIBC_2.27): Likewise.
	* wcsmbs/Versions (GLIBC_2.27): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.

2 files changed, 18 insertions, 16 deletions

diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps
index c0ed6a9497..1dc47acbfe 100644
--- a/sysdeps/i386/fpu/libm-test-ulps
+++ b/sysdeps/i386/fpu/libm-test-ulps
@@ -1278,7 +1278,7 @@ Function: "cosh_downward":
 double: 2
 float: 1
 float128: 2
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -1288,7 +1288,7 @@ Function: "cosh_towardzero":
 double: 2
 float: 1
 float128: 2
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -1298,7 +1298,7 @@ Function: "cosh_upward":
 double: 4
 float: 2
 float128: 3
-idouble: 1
+idouble: 4
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -1992,9 +1992,9 @@ ldouble: 4
 
 Function: "gamma":
 double: 3
-float: 2
+float: 3
 idouble: 3
-ifloat: 2
+ifloat: 3
 ildouble: 4
 ldouble: 4
 
@@ -2176,10 +2176,10 @@ ldouble: 5
 
 Function: "lgamma":
 double: 3
-float: 2
+float: 3
 float128: 5
 idouble: 3
-ifloat: 2
+ifloat: 3
 ifloat128: 5
 ildouble: 4
 ldouble: 4
@@ -2477,6 +2477,7 @@ ldouble: 3
 Function: "sinh":
 double: 1
 float128: 2
+idouble: 1
 ifloat128: 2
 ildouble: 2
 ldouble: 2
@@ -2485,7 +2486,7 @@ Function: "sinh_downward":
 double: 2
 float: 1
 float128: 3
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 3
 ildouble: 5
@@ -2495,7 +2496,7 @@ Function: "sinh_towardzero":
 double: 2
 float: 1
 float128: 3
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 3
 ildouble: 4
@@ -2505,7 +2506,7 @@ Function: "sinh_upward":
 double: 4
 float: 2
 float128: 4
-idouble: 1
+idouble: 4
 ifloat: 1
 ifloat128: 4
 ildouble: 5
diff --git a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
index e67837c5df..7e13fc7948 100644
--- a/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
+++ b/sysdeps/i386/i686/fpu/multiarch/libm-test-ulps
@@ -1270,7 +1270,7 @@ Function: "cosh_downward":
 double: 2
 float: 1
 float128: 2
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -1280,7 +1280,7 @@ Function: "cosh_towardzero":
 double: 2
 float: 1
 float128: 2
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -1290,7 +1290,7 @@ Function: "cosh_upward":
 double: 4
 float: 2
 float128: 3
-idouble: 1
+idouble: 4
 ifloat: 1
 ifloat128: 1
 ildouble: 2
@@ -2461,6 +2461,7 @@ ldouble: 3
 Function: "sinh":
 double: 1
 float128: 2
+idouble: 1
 ifloat128: 2
 ildouble: 2
 ldouble: 2
@@ -2469,7 +2470,7 @@ Function: "sinh_downward":
 double: 2
 float: 1
 float128: 3
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 3
 ildouble: 5
@@ -2479,7 +2480,7 @@ Function: "sinh_towardzero":
 double: 2
 float: 1
 float128: 3
-idouble: 1
+idouble: 2
 ifloat: 1
 ifloat128: 3
 ildouble: 4
@@ -2489,7 +2490,7 @@ Function: "sinh_upward":
 double: 4
 float: 2
 float128: 4
-idouble: 1
+idouble: 4
 ifloat: 1
 ifloat128: 4
 ildouble: 5