LoongArch gas support

2021-10-22  Chenghua Xu  <xuchenghua@loongson.cn>
            Zhensong Liu  <liuzhensong@loongson.cn>
            Weinan Liu  <liuweinan@loongson.cn>
	    Xiaolin Tang  <tangxiaolin@loongson.cn>

gas/
	* Makefile.am: Add LoongArch.
	* NEWS: Mention LoongArch support.
	* config/loongarch-lex-wrapper.c: New.
	* config/loongarch-lex.h: New.
	* config/loongarch-lex.l: New.
	* config/loongarch-parse.y: New.
	* config/tc-loongarch.c: New.
	* config/tc-loongarch.h: New.
	* configure.ac: Add LoongArch.
	* configure.tgt: Likewise.
	* doc/as.texi: Likewise.
	* doc/c-loongarch.texi: Likewise.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* po/POTFILES.in: Regenerate.
gas/testsuite/
	* gas/all/gas.exp: Add LoongArch.
	* gas/elf/elf.exp: Likewise.
	* gas/loongarch/4opt_op.d: New.
	* gas/loongarch/4opt_op.s: Likewise.
	* gas/loongarch/fix_op.d: Likewise.
	* gas/loongarch/fix_op.s: Likewise.
	* gas/loongarch/float_op.d: Likewise.
	* gas/loongarch/float_op.s: Likewise.
	* gas/loongarch/imm_op.d: Likewise.
	* gas/loongarch/imm_op.s: Likewise.
	* gas/loongarch/jmp_op.d: Likewise.
	* gas/loongarch/jmp_op.s: Likewise.
	* gas/loongarch/load_store_op.d: Likewise.
	* gas/loongarch/load_store_op.s: Likewise.
	* gas/loongarch/loongarch.exp: Likewise.
	* gas/loongarch/macro_op.d: Likewise.
	* gas/loongarch/macro_op.s: Likewise.
	* gas/loongarch/nop.d: Likewise.
	* gas/loongarch/nop.s: Likewise.
	* gas/loongarch/privilege_op.d: Likewise.
	* gas/loongarch/privilege_op.s: Likewise.
	* gas/loongarch/syscall.d: Likewise.
	* gas/loongarch/syscall.s: Likewise.
	* lib/gas-defs.exp: Add LoongArch.

2 files changed, 70 insertions, 0 deletions

diff --git a/gas/doc/as.texi b/gas/doc/as.texi
index b8d5b9b..0cc7455 100644
--- a/gas/doc/as.texi
+++ b/gas/doc/as.texi
@@ -379,6 +379,11 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
 @emph{Target IP2K options:}
    [@b{-mip2022}|@b{-mip2022ext}]
 @end ifset
+@ifset LOONGARCH
+
+@emph{Target LOONGARCH options:}
+   [@b{-fpic}|@b{-fPIC}|@b{-fno-pic}]
+@end ifset
 @ifset M32C
 
 @emph{Target M32C options:}
@@ -1756,6 +1761,25 @@ Assemble for a little endian target.
 @end ifset
 @c man end
 
+@ifset LOONGARCH
+
+@ifclear man
+@xref{LoongArch-Options}, for the options available when @value{AS} is configured
+for a LoongArch processor.
+@end ifclear
+
+@ifset man
+@c man begin OPTIONS
+The following options are available when @value{AS} is configured for a
+LoongArch processor.
+@c man end
+@c man begin INCLUDE
+@include c-loongarch.texi
+@c ended inside the included file
+@end ifset
+
+@end ifset
+
 @ifset METAG
 
 @ifclear man
@@ -7837,6 +7861,9 @@ subject, see the hardware manufacturer's manual.
 @ifset IP2K
 * IP2K-Dependent::              IP2K Dependent Features
 @end ifset
+@ifset LOONGARCH
+* LoongArch-Dependent::         LoongArch Dependent Features
+@end ifset
 @ifset LM32
 * LM32-Dependent::              LM32 Dependent Features
 @end ifset
@@ -8061,6 +8088,10 @@ family.
 @include c-lm32.texi
 @end ifset
 
+@ifset LOONGARCH
+@include c-loongarch.texi
+@end ifset
+
 @ifset M32C
 @include c-m32c.texi
 @end ifset
diff --git a/gas/doc/c-loongarch.texi b/gas/doc/c-loongarch.texi
new file mode 100644
index 0000000..2a13948
--- /dev/null
+++ b/gas/doc/c-loongarch.texi
@@ -0,0 +1,39 @@
+@c Copyright (C) 2021 Free Software Foundation, Inc.
+@c This is part of the GAS anual.
+@c For copying conditions, see the file as.texinfo
+@c man end
+
+@ifset GENERIC
+@page
+@node LoongArch-Dependent
+@chapter LoongArch Dependent Features
+@end ifset
+@ifclear GENERIC
+@node Machine Dependencies
+@chapter LoongArch Dependent Features
+@end ifclear
+
+@cindex LoongArch support
+@menu
+* LoongArch-Options::        LoongArch Options
+@end menu
+
+@node LoongArch-Options
+@section LoongArch Options
+
+The following table lists all available LoongArch specific options.
+
+@c man begin OPTIONS
+@table @gcctabopt
+
+@cindex @samp{-fpic} option, LoongArch
+@item -fpic
+@itemx -fPIC
+Generate position-independent code
+
+@cindex @samp{-fno-pic} option, LoongArch
+@item -fno-pic
+Don't generate position-independent code (default)
+
+@end table
+@c man end