[PATCH,V4 12/14] i386-reg.tbl: Add a comment to reflect dependency on ordering

[Indu Bhagat <indu.bhagat@oracle.com>]

[New in V3. No changes since V3]

The ginsn representation keeps the DWARF register number of the
operands.  The API ginsn_dw2_regnum relies on the the relative ordering
of these register entries in the table.  Add a comment to make it clear.

opcodes/
	* i386-reg.tbl: Add a comment.
---
 opcodes/i386-reg.tbl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/opcodes/i386-reg.tbl b/opcodes/i386-reg.tbl
index 8fead35e320..56c7655dd88 100644
--- a/opcodes/i386-reg.tbl
+++ b/opcodes/i386-reg.tbl
@@ -18,6 +18,9 @@
 // Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
 // 02110-1301, USA.
 
+// The code in gas backend for SCFI relies on the relative ordering
+// of 8 bit / 16 bit / 32 bit / 64 bit regs
+
 // 8 bit regs
 al, Class=Reg|Instance=Accum|Byte, 0, 0, Dw2Inval, Dw2Inval
 cl, Class=Reg|Instance=RegC|Byte, 0, 1, Dw2Inval, Dw2Inval
-- 
2.41.0