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Patch to add support for SSE5 instructions to x86 binutils

From: Michael Meissner
Subject: Patch to add support for SSE5 instructions to x86 binutils
Date: Fri, 31 Aug 2007 11:59:14 -0400
User-agent: Mutt/

On August 30th, AMD announced the new SSE5 instruction set that will be part of
future processors.  The programmer's guide for these new instructions is
located at:

The enclosed patch adds support for the SSE5 instructions to the assembler and
disassembler.  Is it ok to apply this patch?  If not, what changes would people

It turned out the old move from test register instructions that were in the
I386 and I486 processors but is not in modern processors overlaps with the SSE5
encoding (0x0f24).  These can be disambiguated because the move from test
register instruction always uses MODRM encoding with the upper 2 bits set (for
register/register encoding), and none of the SSE5 instructions set the upper 2

I needed 3 extra opcode_modifier bits to implement SSE5, and only two bits are
available without going to long long.  I modified the structures to add an
opcode_modifier2 field, and I changed the i386-gen.c program so that existing
lines in the i386-opc.tbl file will be handled without modifying them.  I can
modify all of the instruction lines to add the 0 field if people would prefer.

Michael Meissner, AMD
90 Central Street, MS 83-29, Boxborough, MA, 01719, USA

Attachment: sse5-binutils.patch
Description: Text document

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