[committed] MIPS/GAS: Update `match_float_constant' and `match_operand' descriptions

["Maciej W. Rozycki" <macro at imgtec dot com>]

Complement commit a92713e60ef4 ("Preparse MIPS instructions into 
tokens"), <https://sourceware.org/ml/binutils/2013-07/msg00143.html>, 
and update `match_float_constant' and `match_operand' function 
descriptions according to semantics changes.

	gas/
	* config/tc-mips.c (match_float_constant): Update description.
	(match_operand): Likewise.
---
binutils-mips-gas-match-operand-arg.diff
Index: binutils/gas/config/tc-mips.c
===================================================================
--- binutils.orig/gas/config/tc-mips.c	2017-06-30 02:46:46.845942621 +0100
+++ binutils/gas/config/tc-mips.c	2017-06-30 02:46:57.329807750 +0100
@@ -5937,9 +5937,9 @@ match_tied_reg_operand (struct mips_arg_
   return match_reg (arg, OP_REG_GP, &regno) && regno == other_regno;
 }
 
-/* Read a floating-point constant from S for LI.S or LI.D.  LENGTH is
-   the length of the value in bytes (4 for float, 8 for double) and
-   USING_GPRS says whether the destination is a GPR rather than an FPR.
+/* Try to match a floating-point constant from ARG for LI.S or LI.D.
+   LENGTH is the length of the value in bytes (4 for float, 8 for double)
+   and USING_GPRS says whether the destination is a GPR rather than an FPR.
 
    Return the constant in IMM and OFFSET as follows:
 
@@ -6133,8 +6133,8 @@ match_vu0_suffix_operand (struct mips_ar
   return TRUE;
 }
 
-/* S is the text seen for ARG.  Match it against OPERAND.  Return the end
-   of the argument text if the match is successful, otherwise return null.  */
+/* Try to match a token from ARG against OPERAND.  Consume the token
+   and return true on success, otherwise return false.  */
 
 static bfd_boolean
 match_operand (struct mips_arg_info *arg,