Update RISC-V documentation and make sure that it is included in the gas info file.

* Makefile.am (CPU_DOCS): Add c-riscv.texi.
	* Makefile.in: Regenerate.
	* doc/all.texi: Set RISCV.
	* doc/as.texinfo: Add RISCV options.
	Add RISC-V-Dependent node.
	Include c-riscv.texi.
	* doc/c-riscv.texi: Rename RISC-V Options to RISC-V-Opts.

gas/ChangeLog

@@ -1,3 +1,14 @@
+2016-11-04  Palmer Dabbelt  <palmer@dabbelt.com>
+	    Andrew Waterman <andrew@sifive.com>
+
+	* Makefile.am (CPU_DOCS): Add c-riscv.texi.
+	* Makefile.in: Regenerate.
+	* doc/all.texi: Set RISCV.
+	* doc/as.texinfo: Add RISCV options.
+	Add RISC-V-Dependent node.
+	Include c-riscv.texi.
+	* doc/c-riscv.texi: Rename RISC-V Options to RISC-V-Opts.
+
 2016-11-03  Graham Markall  <graham.markall@embecosm.com>
 
 	* testsuite/gas/arc/nps400-6.s: Change ldbit tests so that limm

gas/doc/Makefile.am

@@ -81,6 +81,7 @@ CPU_DOCS = \
 	c-pj.texi \
 	c-ppc.texi \
 	c-rl78.texi \
+	c-riscv.texi \
 	c-rx.texi \
 	c-s390.texi \
 	c-score.texi \

gas/doc/Makefile.in

@@ -355,6 +355,7 @@ CPU_DOCS = \
 	c-pj.texi \
 	c-ppc.texi \
 	c-rl78.texi \
+	c-riscv.texi \
 	c-rx.texi \
 	c-s390.texi \
 	c-score.texi \

gas/doc/all.texi

@@ -63,6 +63,7 @@
 @set PJ
 @set PPC
 @set RL78
+@set RISCV
 @set RX
 @set S390
 @set SCORE

gas/doc/as.texinfo

@@ -511,6 +511,13 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
    [@b{-mint-register=@var{number}}]
    [@b{-mgcc-abi}|@b{-mrx-abi}]
 @end ifset
+@ifset RISCV
+
+@emph{Target RISC-V options:}
+   [@b{-m32}|@b{-m64}]
+   [@b{-mrvc}]
+   [@b{-mhard-float}|@b{-msoft-float}]
+@end ifset
 @ifset S390
 
 @emph{Target s390 options:}
@@ -7592,6 +7599,9 @@ subject, see the hardware manufacturer's manual.
 @ifset RL78
 * RL78-Dependent::              RL78 Dependent Features
 @end ifset
+@ifset RISCV
+* RISC-V-Dependent::            RISC-V Dependent Features
+@end ifset
 @ifset RX
 * RX-Dependent::                RX Dependent Features
 @end ifset
@@ -7819,6 +7829,10 @@ family.
 @include c-rl78.texi
 @end ifset
 
+@ifset RISCV
+@include c-riscv.texi
+@end ifset
+
 @ifset RX
 @include c-rx.texi
 @end ifset

gas/doc/c-riscv.texi

@@ -15,10 +15,10 @@
 
 @cindex RISC-V support
 @menu
-* RISC-V Options::      RISC-V Options
+* RISC-V-Opts::      RISC-V Options
 @end menu
 
-@node RISC-V Options
+@node RISC-V-Opts
 @section Options
 
 The following table lists all availiable RISC-V specific options
@@ -40,8 +40,8 @@ Enables the C ISA subset for compressed instructions.
 Select the floating-point ABI, hard-float has F registers while soft-float
 doesn't.
 
-@cindex @samp{-march=RV{32,64}{G,I}{M,}{A,}{F,}{D,}{C,}} option, RISC-V
+@cindex @samp{-march=ISA} option, RISC-V
-@item -march=RV{32,64}{G,I}{M,}{A,}{F,}{D,}{C,}
+@item -march=ISA
 Select the base isa, as specified by ISA.  For example -march=RV32IMA.
 
 @end table