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[RFA] Add comment to opcode/i386.h
- From: dje at google dot com (Doug Evans)
- To: binutils at sourceware dot org
- Date: Sun, 1 Feb 2009 13:02:37 -0800 (PST)
- Subject: [RFA] Add comment to opcode/i386.h
Hi. A simple comment addition to opcode/i386.h.
Ok to check in?
2009-02-01 Doug Evans <dje@google.com>
* i386.h: Add comment regarding sse* insns and prefixes.
Index: opcode/i386.h
===================================================================
RCS file: /cvs/src/src/include/opcode/i386.h,v
retrieving revision 1.80
diff -u -p -u -r1.80 i386.h
--- opcode/i386.h 29 Jan 2009 00:29:53 -0000 1.80
+++ opcode/i386.h 1 Feb 2009 20:54:23 -0000
@@ -59,6 +59,11 @@
/* The opcode for the fwait instruction, which disassembler treats as a
prefix when it can. */
#define FWAIT_OPCODE 0x9b
+
+/* Instruction prefixes.
+ NOTE: For certain SSE* instructions, 0x66,0xf2,0xf3 are treated as
+ part of the opcode. Other prefixes may still appear between them
+ and the 0x0f part of the opcode. */
#define ADDR_PREFIX_OPCODE 0x67
#define DATA_PREFIX_OPCODE 0x66
#define LOCK_PREFIX_OPCODE 0xf0