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[v3,04/19] Skeleton documentation for the RISC-V port

Message ID 20171227060534.3998-5-palmer@dabbelt.com
State New
Headers show
Series [v3,01/19] Avoid race conditions when rebuilding librt.so | expand

Commit Message

Palmer Dabbelt Dec. 27, 2017, 6:05 a.m. UTC 
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.
---
 NEWS             | 19 +++++++++++++++----
 README           |  2 ++
 manual/math.texi |  2 +-
 3 files changed, 18 insertions(+), 5 deletions(-)
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Patch

diff --git a/NEWS b/NEWS
index 95f368340b2d..e46facc728cc 100644
--- a/NEWS
+++ b/NEWS
@@ -40,13 +40,13 @@  Major new features:
   process aborts as the result of assertion failures.
 
 * On platforms where long double has the IEEE binary128 format (aarch64,
-  alpha, mips64, s390 and sparc), the math library now implements _Float128
-  interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.  These
-  are the same interfaces added in version 2.26 for some platforms where
+  alpha, mips64, riscv, s390 and sparc), the math library now implements
+  _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
+  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.
 
 * 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
   18661-3:2015.  These are corresponding interfaces to those supported for
   _Float128.
@@ -69,6 +69,17 @@  Major new features:
   collation ordering.  Previous glibc versions used locale-specific
   ordering, the change might break systems that relied on that.
 
+* 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:
+
+    - rv32imac ilp32
+    - rv32imafdc ilp32
+    - rv32imafdc ilp32d
+    - rv64imac lp64
+    - rv64imafdc lp64
+    - rv64imafdc lp64d
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
diff --git a/README b/README
index d0e99ea7d5a0..425a82956fc8 100644
--- a/README
+++ b/README
@@ -39,6 +39,8 @@  The GNU C Library supports these configurations for using Linux kernels:
 	powerpc64*-*-linux-gnu	Big-endian and little-endian.
 	s390-*-linux-gnu
 	s390x-*-linux-gnu
+	riscv32-*-linux-gnu
+	riscv64-*-linux-gnu
 	sh[34]-*-linux-gnu
 	sparc*-*-linux-gnu
 	sparc64*-*-linux-gnu
diff --git a/manual/math.texi b/manual/math.texi
index a9f2a9813832..d19a14b47dc3 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, s390 and sparc.
+aarch64, alpha, mips64, riscv, s390 and sparc.
 
 @menu
 * Mathematical Constants::      Precise numeric values for often-used