diff options
Diffstat (limited to 'gas/doc')
| -rw-r--r-- | gas/doc/Makefile.am | 1 | ||||
| -rw-r--r-- | gas/doc/Makefile.in | 7 | ||||
| -rw-r--r-- | gas/doc/all.texi | 1 | ||||
| -rw-r--r-- | gas/doc/as.texinfo | 31 | ||||
| -rw-r--r-- | gas/doc/c-nios2.texi | 249 |
5 files changed, 286 insertions, 3 deletions
diff --git a/gas/doc/Makefile.am b/gas/doc/Makefile.am index b200378..3d1e933 100644 --- a/gas/doc/Makefile.am +++ b/gas/doc/Makefile.am @@ -74,6 +74,7 @@ CPU_DOCS = \ c-mmix.texi \ c-mt.texi \ c-msp430.texi \ + c-nios2.texi \ c-ns32k.texi \ c-pdp11.texi \ c-pj.texi \ diff --git a/gas/doc/Makefile.in b/gas/doc/Makefile.in index 9969ff4..4c3c4fb 100644 --- a/gas/doc/Makefile.in +++ b/gas/doc/Makefile.in @@ -316,6 +316,7 @@ CPU_DOCS = \ c-mmix.texi \ c-mt.texi \ c-msp430.texi \ + c-nios2.texi \ c-ns32k.texi \ c-pdp11.texi \ c-pj.texi \ @@ -410,17 +411,17 @@ as.info: as.texinfo $(as_TEXINFOS) fi; \ rm -rf $$backupdir; exit $$rc -as.dvi: as.texinfo $(as_TEXINFOS) +as.dvi: as.texinfo $(as_TEXINFOS) TEXINPUTS="$(am__TEXINFO_TEX_DIR)$(PATH_SEPARATOR)$$TEXINPUTS" \ MAKEINFO='$(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir)' \ $(TEXI2DVI) -o $@ `test -f 'as.texinfo' || echo '$(srcdir)/'`as.texinfo -as.pdf: as.texinfo $(as_TEXINFOS) +as.pdf: as.texinfo $(as_TEXINFOS) TEXINPUTS="$(am__TEXINFO_TEX_DIR)$(PATH_SEPARATOR)$$TEXINPUTS" \ MAKEINFO='$(MAKEINFO) $(AM_MAKEINFOFLAGS) $(MAKEINFOFLAGS) -I $(srcdir)' \ $(TEXI2PDF) -o $@ `test -f 'as.texinfo' || echo '$(srcdir)/'`as.texinfo -as.html: as.texinfo $(as_TEXINFOS) +as.html: as.texinfo $(as_TEXINFOS) rm -rf $(@:.html=.htp) if $(MAKEINFOHTML) $(AM_MAKEINFOHTMLFLAGS) $(MAKEINFOFLAGS) -I $(srcdir) \ -o $(@:.html=.htp) `test -f 'as.texinfo' || echo '$(srcdir)/'`as.texinfo; \ diff --git a/gas/doc/all.texi b/gas/doc/all.texi index b213ad7..99dbf8f 100644 --- a/gas/doc/all.texi +++ b/gas/doc/all.texi @@ -58,6 +58,7 @@ @set MMIX @set MS1 @set MSP430 +@set NIOSII @set NS32K @set PDP11 @set PJ diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo index c976c05..cafcb22 100644 --- a/gas/doc/as.texinfo +++ b/gas/doc/as.texinfo @@ -431,6 +431,12 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}. [@b{--no-expand}] [@b{--no-merge-gregs}] [@b{-x}] [@b{--linker-allocated-gregs}] @end ifset +@ifset NIOSII + +@emph{Target Nios II options:} + [@b{-relax-all}] [@b{-relax-section}] [@b{-no-relax}] + [@b{-EB}] [@b{-EL}] +@end ifset @ifset PDP11 @emph{Target PDP11 options:} @@ -1028,6 +1034,24 @@ unit coprocessor. The default is to assume an MMU for 68020 and up. @end table @end ifset +@ifset NIOSII + +@ifclear man +@xref{Nios II Options}, for the options available when @value{AS} is configured +for an Altera Nios II processor. +@end ifclear + +@ifset man +@c man begin OPTIONS +The following options are available when @value{AS} is configured for an +Altera Nios II processor. +@c man end +@c man begin INCLUDE +@include c-nios2.texi +@c ended inside the included file +@end ifset +@end ifset + @ifset PDP11 For details about the PDP-11 machine dependent features options, @@ -7059,6 +7083,9 @@ subject, see the hardware manufacturer's manual. @ifset MSP430 * MSP430-Dependent:: MSP430 Dependent Features @end ifset +@ifset NIOSII +* NiosII-Dependent:: Altera Nios II Dependent Features +@end ifset @ifset NS32K * NS32K-Dependent:: NS32K Dependent Features @end ifset @@ -7270,6 +7297,10 @@ family. @include c-msp430.texi @end ifset +@ifset NIOSII +@include c-nios2.texi +@end ifset + @ifset NS32K @include c-ns32k.texi @end ifset diff --git a/gas/doc/c-nios2.texi b/gas/doc/c-nios2.texi new file mode 100644 index 0000000..1d45dd2 --- /dev/null +++ b/gas/doc/c-nios2.texi @@ -0,0 +1,249 @@ +@c Copyright 2012, 2013 Free Software Foundation, Inc. +@c This is part of the GAS manual. +@c For copying conditions, see the file as.texinfo. +@c man end +@ifset GENERIC +@page +@node NiosII-Dependent +@chapter Nios II Dependent Features +@end ifset +@ifclear GENERIC +@node Machine Dependencies +@chapter Nios II Dependent Features +@end ifclear + +@cindex Altera Nios II support +@cindex Nios support +@cindex Nios II support +@menu +* Nios II Options:: Options +* Nios II Syntax:: Syntax +* Nios II Relocations:: Relocations +* Nios II Directives:: Nios II Machine Directives +* Nios II Opcodes:: Opcodes +@end menu + +@node Nios II Options +@section Options +@cindex Nios II options +@cindex options for Nios II + +@c man begin OPTIONS +@table @gcctabopt + +@cindex @code{relax-section} command line option, Nios II +@item -relax-section +Replace identified out-of-range branches with PC-relative @code{jmp} +sequences when possible. The generated code sequences are suitable +for use in position-independent code, but there is a practical limit +on the extended branch range because of the length of the sequences. +This option is the default. + +@cindex @code{relax-all} command line option, Nios II +@item -relax-all +Replace branch instructions not determinable to be in range +and all call instructions with @code{jmp} and @code{callr} sequences +(respectively). This option generates absolute relocations against the +target symbols and is not appropriate for position-independent code. + +@cindex @code{no-relax} command line option, Nios II +@item -no-relax +Do not replace any branches or calls. + +@cindex @code{EB} command line option, Nios II +@item -EB +Generate big-endian output. + +@cindex @code{EL} command line option, Nios II +@item -EL +Generate little-endian output. This is the default. + +@end table +@c man end + +@node Nios II Syntax +@section Syntax +@menu +* Nios II Chars:: Special Characters +@end menu + + +@node Nios II Chars +@subsection Special Characters + +@cindex line comment character, Nios II +@cindex Nios II line comment character +@cindex line separator character, Nios II +@cindex Nios II line separator character +@samp{#} is the line comment character. +@samp{;} is the line separator character. + + +@node Nios II Relocations +@section Nios II Machine Relocations + +@cindex machine relocations, Nios II +@cindex Nios II machine relocations + +@table @code +@cindex @code{hiadj} directive, Nios II +@item %hiadj(@var{expression}) +Extract the upper 16 bits of @var{expression} and add +one if the 15th bit is set. + +The value of @code{%hiadj(@var{expression})} is: +@smallexample +((@var{expression} >> 16) & 0xffff) + ((@var{expression} >> 15) & 0x01) +@end smallexample + +The @code{%hiadj} relocation is intended to be used with +the @code{addi}, @code{ld} or @code{st} instructions +along with a @code{%lo}, in order to load a 32-bit constant. + +@smallexample +movhi r2, %hiadj(symbol) +addi r2, r2, %lo(symbol) +@end smallexample + +@cindex @code{hi} directive, Nios II +@item %hi(@var{expression}) +Extract the upper 16 bits of @var{expression}. + +@cindex @code{lo} directive, Nios II +@item %lo(@var{expression}) +Extract the lower 16 bits of @var{expression}. + +@cindex @code{gprel} directive, Nios II +@item %gprel(@var{expression}) +Subtract the value of the symbol @code{_gp} from +@var{expression}. + +The intention of the @code{%gprel} relocation is +to have a fast small area of memory which only +takes a 16-bit immediate to access. + +@smallexample + .section .sdata +fastint: + .int 123 + .section .text + ldw r4, %gprel(fastint)(gp) +@end smallexample + +@cindex @code{call} directive, Nios II +@cindex @code{got} directive, Nios II +@cindex @code{gotoff} directive, Nios II +@cindex @code{gotoff_lo} directive, Nios II +@cindex @code{gotoff_hiadj} directive, Nios II +@cindex @code{tls_gd} directive, Nios II +@cindex @code{tls_ie} directive, Nios II +@cindex @code{tls_le} directive, Nios II +@cindex @code{tls_ldm} directive, Nios II +@cindex @code{tls_ldo} directive, Nios II +@item %call(@var{expression}) +@itemx %got(@var{expression}) +@itemx %gotoff(@var{expression}) +@itemx %gotoff_lo(@var{expression}) +@itemx %gotoff_hiadj(@var{expression}) +@itemx %tls_gd(@var{expression}) +@itemx %tls_ie(@var{expression}) +@itemx %tls_le(@var{expression}) +@itemx %tls_ldm(@var{expression}) +@itemx %tls_ldo(@var{expression}) + +These relocations support the ABI for Linux Systems documented in the +@cite{Nios II Processor Reference Handbook}. +@end table + + +@node Nios II Directives +@section Nios II Machine Directives + +@cindex machine directives, Nios II +@cindex Nios II machine directives + +@table @code + +@cindex @code{align} directive, Nios II +@item .align @var{expression} [, @var{expression}] +This is the generic @code{.align} directive, however +this aligns to a power of two. + +@cindex @code{half} directive, Nios II +@item .half @var{expression} +Create an aligned constant 2 bytes in size. + +@cindex @code{word} directive, Nios II +@item .word @var{expression} +Create an aligned constant 4 bytes in size. + +@cindex @code{dword} directive, Nios II +@item .dword @var{expression} +Create an aligned constant 8 bytes in size. + +@cindex @code{2byte} directive, Nios II +@item .2byte @var{expression} +Create an unaligned constant 2 bytes in size. + +@cindex @code{4byte} directive, Nios II +@item .4byte @var{expression} +Create an unaligned constant 4 bytes in size. + +@cindex @code{8byte} directive, Nios II +@item .8byte @var{expression} +Create an unaligned constant 8 bytes in size. + +@cindex @code{16byte} directive, Nios II +@item .16byte @var{expression} +Create an unaligned constant 16 bytes in size. + +@cindex @code{set noat} directive, Nios II +@item .set noat +Allows assembly code to use @code{at} register without +warning. Macro or relaxation expansions +generate warnings. + +@cindex @code{set at} directive, Nios II +@item .set at +Assembly code using @code{at} register generates +warnings, and macro expansion and relaxation are +enabled. + +@cindex @code{set nobreak} directive, Nios II +@item .set nobreak +Allows assembly code to use @code{ba} and @code{bt} +registers without warning. + +@cindex @code{set break} directive, Nios II +@item .set break +Turns warnings back on for using @code{ba} and @code{bt} +registers. + +@cindex @code{set norelax} directive, Nios II +@item .set norelax +Do not replace any branches or calls. + +@cindex @code{set relaxsection} directive, Nios II +@item .set relaxsection +Replace identified out-of-range branches with +@code{jmp} sequences (default). + +@cindex @code{set relaxall} directive, Nios II +@item .set relaxsection +Replace all branch and call instructions with +@code{jmp} and @code{callr} sequences. + +@cindex @code{set} directive, Nios II +@item .set @dots{} +All other @code{.set} are the normal use. + +@end table + +@node Nios II Opcodes +@section Opcodes + +@cindex Nios II opcodes +@cindex opcodes for Nios II +@code{@value{AS}} implements all the standard Nios II opcodes documented in the +@cite{Nios II Processor Reference Handbook}, including the assembler +pseudo-instructions. |