tm.texi (Register Classes): Clarify order of sub-initializers in REG_CLASS_CONTENTS.

        * tm.texi (Register Classes): Clarify order of sub-initializers
        in REG_CLASS_CONTENTS.
Ho hum...

From-SVN: r35718

diff --git a/gcc/tm.texi b/gcc/tm.texi
index 25cc96c98c11e07fcb0ea522f72e9e7553661337..b6b93160223afce9d5e28e4732fa26437d060b16 100644 (file)
--- a/gcc/tm.texi
+++ b/gcc/tm.texi
@@ -1828,6 +1828,9 @@ When the machine has more than 32 registers, an integer does not suffice.
 Then the integers are replaced by sub-initializers, braced groupings containing
 several integers.  Each sub-initializer must be suitable as an initializer
 for the type @code{HARD_REG_SET} which is defined in @file{hard-reg-set.h}.
+In this situation, the first integer in each sub-initializer corresponds to
+registers 0 through 31, the second integer to registers 32 through 63, and
+so on.
 
 @findex REGNO_REG_CLASS
 @item REGNO_REG_CLASS (@var{regno})