invoke.texi: Add info for __AVR_ISA_RMW__ builtin macro

* doc/invoke.texi: Add info for __AVR_ISA_RMW__ builtin macro From-SVN: r209169

invoke.texi: Add info for __AVR_ISA_RMW__ builtin macro
* doc/invoke.texi: Add info for __AVR_ISA_RMW__ builtin macro From-SVN: r209169
832e0016 · Denis Chertykov · 738d6b6d · 832e0016
Commit 832e0016 authored Apr 06, 2014 by Denis Chertykov
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gcc/doc/invoke.texi
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--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -12983,6 +12983,9 @@ instructions because of a hardware erratum.  Skip instructions are
 The second macro is only defined if @code{__AVR_HAVE_JMP_CALL__} is also
 set.

+@item __AVR_ISA_RMW__
+The device has Read-Modify-Write instructions (XCH, LAC, LAS and LAT).
+
 @item __AVR_SFR_OFFSET__=@var{offset}
 Instructions that can address I/O special function registers directly
 like @code{IN}, @code{OUT}, @code{SBI}, etc.@: may use a different