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168 lines
4.4 KiB
Plaintext
168 lines
4.4 KiB
Plaintext
@c Copyright (C) 2009-2017 Free Software Foundation, Inc.
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@c This is part of the GAS manual.
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@c For copying conditions, see the file as.texinfo.
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@ifset GENERIC
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@page
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@node SCORE-Dependent
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@chapter SCORE Dependent Features
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@end ifset
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@ifclear GENERIC
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@node Machine Dependencies
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@chapter SCORE Dependent Features
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@end ifclear
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@cindex SCORE processor
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@menu
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* SCORE-Opts:: Assembler options
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* SCORE-Pseudo:: SCORE Assembler Directives
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* SCORE-Syntax:: Syntax
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@end menu
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@node SCORE-Opts
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@section Options
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@cindex options for SCORE
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@cindex SCORE options
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@cindex architectures, SCORE
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@cindex SCORE architectures
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The following table lists all available SCORE options.
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@table @code
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@item -G @var{num}
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This option sets the largest size of an object that can be referenced
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implicitly with the @code{gp} register. The default value is 8.
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@item -EB
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Assemble code for a big-endian cpu
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@item -EL
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Assemble code for a little-endian cpu
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@item -FIXDD
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Assemble code for fix data dependency
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@item -NWARN
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Assemble code for no warning message for fix data dependency
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@item -SCORE5
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Assemble code for target is SCORE5
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@item -SCORE5U
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Assemble code for target is SCORE5U
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@item -SCORE7
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Assemble code for target is SCORE7, this is default setting
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@item -SCORE3
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Assemble code for target is SCORE3
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@item -march=score7
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Assemble code for target is SCORE7, this is default setting
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@item -march=score3
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Assemble code for target is SCORE3
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@item -USE_R1
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Assemble code for no warning message when using temp register r1
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@item -KPIC
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Generate code for PIC. This option tells the assembler to generate
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score position-independent macro expansions. It also tells the
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assembler to mark the output file as PIC.
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@item -O0
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Assembler will not perform any optimizations
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@item -V
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Sunplus release version
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@end table
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@node SCORE-Pseudo
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@section SCORE Assembler Directives
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@cindex directives for SCORE
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@cindex SCORE directives
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A number of assembler directives are available for SCORE. The
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following table is far from complete.
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@table @code
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@item .set nwarn
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Let the assembler not to generate warnings if the source machine
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language instructions happen data dependency.
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@item .set fixdd
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Let the assembler to insert bubbles (32 bit nop instruction /
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16 bit nop! Instruction) if the source machine language instructions
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happen data dependency.
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@item .set nofixdd
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Let the assembler to generate warnings if the source machine
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language instructions happen data dependency. (Default)
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@item .set r1
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Let the assembler not to generate warnings if the source program
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uses r1. allow user to use r1
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@item set nor1
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Let the assembler to generate warnings if the source program uses
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r1. (Default)
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@item .sdata
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Tell the assembler to add subsequent data into the sdata section
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@item .rdata
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Tell the assembler to add subsequent data into the rdata section
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@item .frame "frame-register", "offset", "return-pc-register"
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Describe a stack frame. "frame-register" is the frame register,
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"offset" is the distance from the frame register to the virtual
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frame pointer, "return-pc-register" is the return program register.
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You must use ".ent" before ".frame" and only one ".frame" can be
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used per ".ent".
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@item .mask "bitmask", "frameoffset"
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Indicate which of the integer registers are saved in the current
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function's stack frame, this is for the debugger to explain the
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frame chain.
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@item .ent "proc-name"
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Set the beginning of the procedure "proc_name". Use this directive
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when you want to generate information for the debugger.
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@item .end proc-name
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Set the end of a procedure. Use this directive to generate information
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for the debugger.
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@item .bss
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Switch the destination of following statements into the bss section,
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which is used for data that is uninitialized anywhere.
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@end table
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@node SCORE-Syntax
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@section SCORE Syntax
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@menu
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* SCORE-Chars:: Special Characters
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@end menu
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@node SCORE-Chars
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@subsection Special Characters
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@cindex line comment character, SCORE
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@cindex SCORE line comment character
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The presence of a @samp{#} appearing anywhere on a line indicates the
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start of a comment that extends to the end of that line.
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If a @samp{#} appears as the first character of a line then the whole
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line is treated as a comment, but in this case the line can also be a
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logical line number directive (@pxref{Comments}) or a preprocessor
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control command (@pxref{Preprocessing}).
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@cindex line separator, SCORE
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@cindex statement separator, SCORE
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@cindex SCORE line separator
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The @samp{;} character can be used to separate statements on the same
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line.
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