libunwind.S: Add .arch/.object_arch for armv4 builds.

libunwind.S: Add .arch/.object_arch for armv4 builds.

gcc:
2007-03-07  Paul Brook  <paul@codesourcery.com>

	* config/arm/libunwind.S: Add .arch/.object_arch for armv4 builds.

gcc:
2007-03-07  Joseph Myers  <joseph@codesourcery.com>

	* config/arm/unwind-arm.c (struct wmmxd_regs, struct wmmxc_regs):
	New.
	(phase1_vrs): Use them.
	(DEMAND_SAVE_WMMXD, DEMAND_SAVE_WMMXC): New.
	(__gnu_Unwind_Save_WMMXD, __gnu_Unwind_Restore_WMMXD,
	__gnu_Unwind_Save_WMMXC, __gnu_Unwind_Restore_WMMXC): Declare.
	(restore_non_core_regs): Call __gnu_Unwind_Restore_WMMXD and
	__gnu_Unwind_Restore_WMMXC if required.
	(_Unwind_VRS_Pop): Implement iWMMXt support.
	* config/arm/libunwind.S (gnu_Unwind_Restore_WMMXD,
	gnu_Unwind_Save_WMMXD, gnu_Unwind_Restore_WMMXC,
	gnu_Unwind_Save_WMMXC): Define.

gcc/testsuite:
2007-03-07  Joseph Myers  <joseph@codesourcery.com>

	* g++.dg/eh/arm-iwmmxt-unwind.C: New test.

From-SVN: r122658