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Skeleton documentation for the RISC-V port

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During the upstreaming process it was suggested that I add a handful of
small documentation entries about the RISC-V port, which I've collected
here.

2018-01-29  Palmer Dabbelt  <palmer@sifive.com>

        * manual/math.texi: RISC-V supports _Float128 and _Float64x.
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Palmer Dabbelt 2017-12-26 20:55:44 -08:00
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1
ChangeLog
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@ -2,6 +2,7 @@
* sysdeps/init_array/crti.S (.section .init_array): Add * sysdeps/init_array/crti.S (.section .init_array): Add
PREINIT_FUNCTION when defined. PREINIT_FUNCTION when defined.
* manual/math.texi: RISC-V supports _Float128 and _Float64x.
2018-01-29 Florian Weimer <fweimer@redhat.com> 2018-01-29 Florian Weimer <fweimer@redhat.com>

16
NEWS
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@ -41,13 +41,13 @@ Major new features:
process aborts as the result of assertion failures. process aborts as the result of assertion failures.
* On platforms where long double has the IEEE binary128 format (aarch64, * On platforms where long double has the IEEE binary128 format (aarch64,
alpha, mips64, s390 and sparc), the math library now implements _Float128 alpha, mips64, riscv, s390 and sparc), the math library now implements
interfaces for that type, as defined by ISO/IEC TS 18661-3:2015. These _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
are the same interfaces added in version 2.26 for some platforms where These are the same interfaces added in version 2.26 for some platforms where
this format is supported but is not the format of long double. this format is supported but is not the format of long double.
* On platforms with support for _Float64x (aarch64, alpha, i386, ia64, * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
mips64, powerpc64le, s390, sparc and x86_64), the math library now mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
implements interfaces for that type, as defined by ISO/IEC TS implements interfaces for that type, as defined by ISO/IEC TS
18661-3:2015. These are corresponding interfaces to those supported for 18661-3:2015. These are corresponding interfaces to those supported for
_Float128. _Float128.
@ -98,6 +98,14 @@ Major new features:
to fail to load locales and fall back to the builtin C/POSIX locales. to fail to load locales and fall back to the builtin C/POSIX locales.
See notes below for other changes affecting compatibility. See notes below for other changes affecting compatibility.
* Support for the RISC-V ISA running on Linux has been added. This port
requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
for the following ISA and ABI pairs:
- rv64imac lp64
- rv64imafdc lp64
- rv64imafdc lp64d
Deprecated and removed features, and other changes affecting compatibility: Deprecated and removed features, and other changes affecting compatibility:
* Statically compiled applications attempting to load locales compiled for the * Statically compiled applications attempting to load locales compiled for the

1
README
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@ -39,6 +39,7 @@ The GNU C Library supports these configurations for using Linux kernels:
powerpc64*-*-linux-gnu Big-endian and little-endian. powerpc64*-*-linux-gnu Big-endian and little-endian.
s390-*-linux-gnu s390-*-linux-gnu
s390x-*-linux-gnu s390x-*-linux-gnu
riscv64-*-linux-gnu
sh[34]-*-linux-gnu sh[34]-*-linux-gnu
sparc*-*-linux-gnu sparc*-*-linux-gnu
sparc64*-*-linux-gnu sparc64*-*-linux-gnu

2
manual/math.texi
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@ -70,7 +70,7 @@ provided for @code{_Float32}, @code{_Float64} and @code{_Float32x} on
all platforms. all platforms.
It is also provided for @code{_Float128} and @code{_Float64x} on It is also provided for @code{_Float128} and @code{_Float64x} on
powerpc64le (PowerPC 64-bits little-endian), x86_64, x86, ia64, powerpc64le (PowerPC 64-bits little-endian), x86_64, x86, ia64,
aarch64, alpha, mips64, s390 and sparc. aarch64, alpha, mips64, riscv, s390 and sparc.
@menu @menu
* Mathematical Constants:: Precise numeric values for often-used * Mathematical Constants:: Precise numeric values for often-used