[PATCH ARM 5/6]: Architectural Extensions - Integer Divide Extensions

[Matthew Gretton-Dann]

All,

The attached patch adds support for the Integer Divide Extensions to
v7-A, under the 'idiv' extension.

When enabled the extension adds support for the UDIV and SDIV
instructions in ARM and Thumb states to v7-A.  It is present by default
on Cortex-A15.

Note that v7-R and v7-M already have support for UDIV and SDIV but in 
Thumb state only.  This patch does not change the behaviour of those
architectures.

Proposed ChangeLogs:

gas/ChangeLog:
2010-09-22  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* config/tc-arm.c (arm_ext_adiv): Add.
	(do_div): Add.
	(insns): Accept UDIV and SDIV in ARM state.
	(arm_cpus): The cortex-a15 option has all current v7-A 
	extensions.
	(arm_extensions): Add 'idiv' extension.
	(aeabi_set_public_attributes): Update Tag_DIV_use values for the
	Integer Divide extension.
	* doc/c-arm.texi: Document the idiv extension.

gas/testsuite/ChangeLog:
2010-09-22  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* gas/arm/armv7-a+idiv.d: New test.
	* gas/arm/armv7-a+idiv.s: Likewise.
	* gas/arm/attr-march-all.d: Update for Integer divide extension.
	* gas/arm/attr-march-armv7-a+idiv.d: New test.

include/opcode/ChangeLog:
2010-09-22  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>
	
	* arm.h (ARM_AEXT_ADIV): Add.
	(ARM_ARCH_V7A_IDIV_MP_SEC): Likewise.

opcodes/ChangeLog:
2010-09-22  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* arm-dis.c (arm_opcodes): Support disassembly of UDIV and SDIV 
	in ARM state.

Thanks,

Matt



-- 
Matthew Gretton-Dann
Principal Engineer - PDSW Tools
ARM Ltd
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