Add Intel MCU support to gas

-march=iamcu must be passed to i386 assembler to generate Intel MCU object
file.

gas/

	* config/tc-i386.c (cpu_arch): Add iamcu.
	(i386_align_code): Handle PROCESSOR_IAMCU.
	(i386_arch): Likewise.
	(i386_mach): Likewise.
	(i386_target_format): Likewise.
	(valid_iamcu_cpu_flags): New function.
	(check_cpu_arch_compatible): Only allow Intel MCU instructions
	when targeting Intel MCU.
	(set_cpu_arch): Call valid_iamcu_cpu_flags to check if CPU flags
	are valid for Intel MCU.
	(md_parse_option): Likewise.
	* tc-i386.h (ELF_TARGET_IAMCU_FORMAT): New.
	(processor_type): Add PROCESSOR_IAMCU.
	* doc/c-i386.texi: Document iamcu.

gas/testsuite/

	* gas/i386/i386.exp: Run iamcu-1, iamcu-2, iamcu-3, iamcu-inval-1,
	iamcu-inval-2 and iamcu-inval-3.
	* gas/i386/iamcu-1.d: New file.
	* gas/i386/iamcu-1.s: Likewise.
	* gas/i386/iamcu-2.d: Likewise.
	* gas/i386/iamcu-2.s: Likewise.
	* gas/i386/iamcu-3.d: Likewise.
	* gas/i386/iamcu-3.s: Likewise.
	* gas/i386/iamcu-inval-1.l: Likewise.
	* gas/i386/iamcu-inval-1.s: Likewise.
	* gas/i386/iamcu-inval-2.l: Likewise.
	* gas/i386/iamcu-inval-2.s: Likewise.
	* gas/i386/iamcu-inval-3.l: Likewise.
	* gas/i386/iamcu-inval-3.s: Likewise.

1 files changed, 2 insertions, 1 deletions

diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index eb6790c..47bcbbb 100644
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -110,6 +110,7 @@ processor names are recognized:
 @code{corei7},
 @code{l1om},
 @code{k1om},
+@code{iamcu},
 @code{k6},
 @code{k6_2},
 @code{athlon},
@@ -1082,7 +1083,7 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{i486} @tab @samp{i586} @tab @samp{i686} @tab @samp{pentium}
 @item @samp{pentiumpro} @tab @samp{pentiumii} @tab @samp{pentiumiii} @tab @samp{pentium4}
 @item @samp{prescott} @tab @samp{nocona} @tab @samp{core} @tab @samp{core2}
-@item @samp{corei7} @tab @samp{l1om} @tab @samp{k1om}
+@item @samp{corei7} @tab @samp{l1om} @tab @samp{k1om} @samp{iamcu}
 @item @samp{k6} @tab @samp{k6_2} @tab @samp{athlon} @tab @samp{k8}
 @item @samp{amdfam10} @tab @samp{bdver1} @tab @samp{bdver2} @tab @samp{bdver3}
 @item @samp{bdver4} @tab @samp{znver1} @tab @samp{btver1} @tab @samp{btver2}