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Line 167... |
@code{ethernet} section of the configuration file. @xref{Ethernet
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@code{ethernet} section of the configuration file. @xref{Ethernet
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Configuration, , Ethernet Configuration}.
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Configuration, , Ethernet Configuration}.
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The default is for this to be disabled.
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The default is for this to be disabled.
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@item --enable-unsigned-xori
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@cindex @code{--enable-unsigned-xori}
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@itemx --disable-unsigned-xori
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@cindex @code{--disable-unsigned-xori}
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@cindex exclusive-OR immediate operand
|
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Historically, @code{l.xori}, has sign extended its operand. This is
|
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inconsistent with the other logical opcodes (@code{l.andi},
|
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@code{l.ori}), but in the absence of @code{l.not}, it allows a register
|
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to be inverted in a single instruction using:
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@example
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@code{l.xori rD,rA,-1}
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@end example
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This flag causes Or1ksim to treat the immediate operand as unsigned (i.e
|
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to zero-extend rather than sign-extend).
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The default is to sign-extend, so that existing code will continue to
|
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work.
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@quotation Caution
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The GNU compiler tool chain makes heavy use of this instruction. Using
|
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unsigned behavior will require the compiler to be modified accordingly.
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This option is provided for experimentation. A future version of
|
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OpenRISC may adopt this more consistent behavior and also provide a
|
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@code{l.not} opcode.
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@end quotation
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@item --enable-range-stats
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@item --enable-range-stats
|
@cindex @code{--enable-range-stats}
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@cindex @code{--enable-range-stats}
|
@itemx --disable-range-stats
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@itemx --disable-range-stats
|
@cindex @code{--disable-range-stats}
|
@cindex @code{--disable-range-stats}
|
@cindex statistics, register over time
|
@cindex statistics, register over time
|
