Add .d8 suffix support to x86 assembler

Add .d8 suffix support to x86 assembler

gas/

2012-01-20  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (_i386_insn): Replace disp32_encoding with
	disp_encoding.
	(md_assemble): Updated.
	(output_branch): Likewise.
	(parse_insn): Support .d8 suffix.
	(build_modrm_byte): Fake zero displacement for .d8 and .d32
	suffixes.

	* doc/c-i386.texi: Document .d8 suffix.

gas/testsuite/

2012-01-20  H.J. Lu  <hongjiu.lu@intel.com>

	* gas/i386/disp32.s: Add tests for .d8 suffix.
	* gas/i386/x86-64-disp32.s: Likewise.

	* gas/i386/disp32.d: Updated.
	* gas/i386/x86-64-disp32.d: Likewise.