gas/testsuite/

gas/testsuite/
	* gas/i386/x86-64-stack.s: Add cases for push immediate.
	* gas/testsuite/gas/i386/ilp32/x86-64-stack-intel.d: Updated.
	* gas/testsuite/gas/i386/ilp32/x86-64-stack-suffix.d: Updated.
	* gas/testsuite/gas/i386/ilp32/x86-64-stack.d: Updated.
	* gas/testsuite/gas/i386/x86-64-stack-intel.d: Updated.
	* gas/testsuite/gas/i386/x86-64-stack-suffix.d: Updated.
	* gas/testsuite/gas/i386/x86-64-stack.d: Updated.

opcodes/
	* i386-dis.c (OP_sI): In b_T_mode and v_mode, REX_W trumps DFLAG.
	(putop): For 'T', 'U', and 'V', treat REX_W like DFLAG.
	(intel_operand_size): For stack_v_mode, treat REX_W like DFLAG.
	(OP_E_register): Likewise.
	(OP_REG): For low 8 whole registers, treat REX_W like DFLAG.