[glibc/azanella/loongarch64] LoongArch: Update NEWS and README for the LoongArch port.

[glibc/azanella/loongarch64] LoongArch: Update NEWS and README for the LoongArch port.

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=14c795df147e41043831d562ed6db7863cc57cf5

commit 14c795df147e41043831d562ed6db7863cc57cf5
Author: caiyinyu <caiyinyu@loongson.cn>
Date:   Tue Jul 19 09:22:10 2022 +0800

    LoongArch: Update NEWS and README for the LoongArch port.

Diff:
---
 NEWS             | 8 ++++++++
 README           | 1 +
 manual/math.texi | 2 +-
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index 8420a65cd0..5827b206d9 100644
--- a/NEWS
+++ b/NEWS
@@ -64,6 +64,14 @@ Major new features:
   added.  The functions use a pseudo-random number generator along with
   entropy from the kernel.
 
+* Support for LoongArch running on Linux has been added.  This port requires
+  as least binutils 2.38, GCC 12, and Linux 5.19.  Currently only hard-float
+  ABI is supported:
+
+    - loongarch64-linux-gnu
+
+  The LoongArch ABI is 64-bit little-endian.
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * Support for prelink will be removed in the next release; this includes
diff --git a/README b/README
index 3d5a78ccff..63f3a1bebf 100644
--- a/README
+++ b/README
@@ -31,6 +31,7 @@ The GNU C Library supports these configurations for using Linux kernels:
 	i[4567]86-*-linux-gnu
 	x86_64-*-linux-gnu	Can build either x86_64 or x32
 	ia64-*-linux-gnu
+	loongarch64-*-linux-gnu Hardware floating point, LE only.
 	m68k-*-linux-gnu
 	microblaze*-*-linux-gnu
 	mips-*-linux-gnu
diff --git a/manual/math.texi b/manual/math.texi
index 141695cc30..76132e9cd5 100644
--- a/manual/math.texi
+++ b/manual/math.texi
@@ -70,7 +70,7 @@ provided for @code{_Float32}, @code{_Float64} and @code{_Float32x} on
 all platforms.
 It is also provided for @code{_Float128} and @code{_Float64x} on
 powerpc64le (PowerPC 64-bits little-endian), x86_64, x86, ia64,
-aarch64, alpha, mips64, riscv, s390 and sparc.
+aarch64, alpha, loongarch, mips64, riscv, s390 and sparc.
 
 @menu
 * Mathematical Constants::      Precise numeric values for often-used