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Explanations of offsets in SDA/ZDA areas fixed.

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Nick Clifton 1997-09-02 23:03:19 +00:00
parent ccf107185d
commit 19ebb9e3b8
2 changed files with 18 additions and 5 deletions
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3
gas/ChangeLog
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@ -1,5 +1,8 @@
Tue Sep 2 15:58:52 1997 Nick Clifton <nickc@cygnus.com>
* doc/c-v850.texi: Explanations of offsets in SDA/ZDA areas
correcetd.
* config/tc-v850.c: Add support for SDA/TDA/ZDA sections.
(v850_reloc_prefix): Duplicate code eliminated. Add code to
recognise special instructions.

20
gas/doc/c-v850.texi
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@ -221,22 +221,30 @@ loads the contents of the location pointed to by the label '_a_variable'
into register 6, provided that the label is located somewhere within +/-
32K of the address held in the GP register. [Note the linker assumes
that the GP register contains a fixed address set to the address of the
label called '__gp'].
label called '__gp'. This can either be set up automatically by the
linker, or specifically set by using the @samp{--defsym __gp=<value>}
command line option].
@cindex @code{tdaoff} pseudo-op, V850
@item tdaoff()
Computes the offset of the named variable from the start of the Tiny
Data Area (whoes address is held in register 30, the EP register) and
stores the result as a 4,5,7 or 8 bit unsigned value in the immediate
stores the result as a
@c start-santize-v850e
4,5,
@c end-santize-v850e
7 or 8 bit unsigned value in the immediate
operand field of the given instruction. For example:
@samp{sld.w tdaoff(_a_variable)[ep],r6}
loads the contents of the location pointed to by the label '_a_variable'
into register 6, provided that the label is located somewhere within 256
into register 6, provided that the label is located somewhere within +256
bytes of the address held in the EP register. [Note the linker assumes
that the EP register contains a fixed address set to the address of the
label called '__ep'].
label called '__ep'. This can either be set up automatically by the
linker, or specifically set by using the @samp{--defsym __ep=<value>}
command line option].
@cindex @code{zdaoff} pseudo-op, V850
@item zdaoff()
@ -247,7 +255,9 @@ given instruction. For example:
@samp{movea zdaoff(_a_variable),zero,r6}
puts the address of the label '_a_variable' into register 6, assuming
that the label is somewhere within the first 32K of memory.
that the label is somewhere within the first 32K of memory. (Strictly
speaking it also possible to access the last 32K of memory as well, as
the offsets are signed).
@end table