| 1 | @c Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000
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| 2 | @c Free Software Foundation, Inc.
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| 3 | @c This is part of the GAS manual.
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| 4 | @c For copying conditions, see the file as.texinfo.
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| 5 | @ifset GENERIC
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| 6 | @page
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| 7 | @node M32R-Dependent
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| 8 | @chapter M32R Dependent Features
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| 9 | @end ifset
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| 10 | @ifclear GENERIC
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| 11 | @node Machine Dependencies
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| 12 | @chapter M32R Dependent Features
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| 13 | @end ifclear
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| 14 |
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| 15 | @cindex M32R support
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| 16 | @menu
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| 17 | * M32R-Opts:: M32R Options
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| 18 | * M32R-Warnings:: M32R Warnings
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| 19 | @end menu
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| 20 |
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| 21 | @node M32R-Opts
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| 22 | @section M32R Options
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| 23 |
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| 24 | @cindex options, M32R
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| 25 | @cindex M32R options
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| 26 |
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| 27 | The Mitsubishi M32R version of @code{@value{AS}} has a few machine
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| 28 | dependent options:
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| 29 |
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| 30 | @table @code
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| 31 | @item -m32rx
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| 32 | @cindex @samp{-m32rx} option, M32RX
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| 33 | @cindex architecture options, M32RX
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| 34 | @cindex M32R architecture options
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| 35 | @code{@value{AS}} can assemble code for several different members of the
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| 36 | Mitsubishi M32R family. Normally the default is to assemble code for
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| 37 | the M32R microprocessor. This option may be used to change the default
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| 38 | to the M32RX microprocessor, which adds some more instructions to the
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| 39 | basic M32R instruction set, and some additional parameters to some of
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| 40 | the original instructions.
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| 41 |
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| 42 | @item -m32r
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| 43 | @cindex @samp{-m32r} option, M32R
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| 44 | @cindex architecture options, M32R
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| 45 | @cindex M32R architecture options
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| 46 | This option can be used to restore the assembler's default behaviour of
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| 47 | assembling for the M32R microprocessor. This can be useful if the
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| 48 | default has been changed by a previous command line option.
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| 49 |
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| 50 | @item -warn-explicit-parallel-conflicts
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| 51 | @cindex @samp{-warn-explicit-parallel-conflicts} option, M32RX
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| 52 | Instructs @code{@value{AS}} to produce warning messages when
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| 53 | questionable parallel instructions are encountered. This option is
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| 54 | enabled by default, but @code{@value{GCC}} disables it when it invokes
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| 55 | @code{@value{AS}} directly. Questionable instructions are those whoes
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| 56 | behaviour would be different if they were executed sequentially. For
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| 57 | example the code fragment @samp{mv r1, r2 || mv r3, r1} produces a
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| 58 | different result from @samp{mv r1, r2 \n mv r3, r1} since the former
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| 59 | moves r1 into r3 and then r2 into r1, whereas the later moves r2 into r1
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| 60 | and r3.
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| 61 |
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