tests/tcg: move i386 specific tests into subdir

These only need to be built for i386 guests. This includes a stub
tests/tcg/i386/Makfile.target which absorbs some of what was in
tests/tcg/Makefile.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -283,6 +283,7 @@ M: Richard Henderson <rth@twiddle.net>
 M: Eduardo Habkost <ehabkost@redhat.com>
 S: Maintained
 F: target/i386/
+F: tests/tcg/i386/
 F: hw/i386/
 F: disas/i386.c
 T: git git://github.com/ehabkost/qemu.git x86-next

tests/tcg/README

@@ -3,45 +3,6 @@ regression testing. Tests are either multi-arch, meaning they can be
 built for all guest architectures that support linux-user executable,
 or they are architecture specific.
 
-i386
-====
-
-test-i386
----------
-
-This program executes most of the 16 bit and 32 bit x86 instructions and
-generates a text output, for comparison with the output obtained with
-a real CPU or another emulator.
-
-The Linux system call modify_ldt() is used to create x86 selectors
-to test some 16 bit addressing and 32 bit with segmentation cases.
-
-The Linux system call vm86() is used to test vm86 emulation.
-
-Various exceptions are raised to test most of the x86 user space
-exception reporting.
-
-linux-test
-----------
-
-This program tests various Linux system calls. It is used to verify
-that the system call parameters are correctly converted between target
-and host CPUs.
-
-test-i386-fprem
----------------
-
-runcom
-------
-
-test-mmap
----------
-
-sha1
-----
-
-hello-i386
-----------
 
 
 ARM

tests/tcg/i386/Makefile.target

+# i386 cross compile notes
+
+I386_SRC=$(SRC_PATH)/tests/tcg/i386
+
+# Set search path for all sources
+VPATH 		+= $(I386_SRC)
+
+I386_SRCS=$(notdir $(wildcard $(I386_SRC)/*.c))
+I386_TESTS=$(I386_SRCS:.c=)
+
+# Update TESTS
+TESTS+=$(I386_TESTS)
+
+ifneq ($(TARGET_NAME),x86_64)
+CFLAGS+=-m32
+endif
+
+#
+# hello-i386 is a barebones app
+#
+hello-i386: CFLAGS+=-ffreestanding
+hello-i386: LDFLAGS+=-nostdlib
+
+#
+# test-386 includes a couple of additional objects that need to be linked together
+#
+
+test-i386: test-i386.c test-i386-code16.S test-i386-vm86.S test-i386.h test-i386-shift.h test-i386-muldiv.h
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
+	   $(<D)/test-i386.c $(<D)/test-i386-code16.S $(<D)/test-i386-vm86.S -lm

tests/tcg/i386/README

+These are i386 specific guest programs
+
+test-i386
+---------
+
+This program executes most of the 16 bit and 32 bit x86 instructions and
+generates a text output, for comparison with the output obtained with
+a real CPU or another emulator.
+
+The Linux system call modify_ldt() is used to create x86 selectors
+to test some 16 bit addressing and 32 bit with segmentation cases.
+
+The Linux system call vm86() is used to test vm86 emulation.
+
+Various exceptions are raised to test most of the x86 user space
+exception reporting.
+
+linux-test
+----------
+
+This program tests various Linux system calls. It is used to verify
+that the system call parameters are correctly converted between target
+and host CPUs.
+
+test-i386-fprem
+---------------
+
+runcom
+------
+
+test-mmap
+---------
+
+sha1
+----
+
+hello-i386
+----------