Dave Martin 638591cd7b ARM: 7626/1: arm/crypto: Make asm SHA-1 and AES code Thumb-2 compatible ... This patch fixes aes-armv4.S and sha1-armv4-large.S to work natively in Thumb. This allows ARM/Thumb interworking workarounds to be removed. I also take the opportunity to convert some explicit assembler directives for exported functions to the standard ENTRY()/ENDPROC(). For the code itself: * In sha1_block_data_order, use of TEQ with sp is deprecated in ARMv7 and not supported in Thumb. For the branches back to .L_00_15 and .L_40_59, the TEQ is converted to a CMP, under the assumption that clobbering the C flag here will not cause incorrect behaviour. For the first branch back to .L_20_39_or_60_79 the C flag is important, so sp is moved temporarily into another register so that TEQ can be used for the comparison. * In the AES code, most forms of register-indexed addressing with shifts and rotates are not permitted for loads and stores in Thumb, so the address calculation is done using a separate instruction for the Thumb case. The resulting code is unlikely to be optimally scheduled, but it should not have a large impact given the overall size of the code. I haven't run any benchmarks. Signed-off-by: Dave Martin <dave.martin@linaro.org> Tested-by: David McCullough <ucdevel@gmail.com> (ARM only) Acked-by: David McCullough <ucdevel@gmail.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2013-01-13 12:41:22 +00:00
..
aes_glue.c
aes-armv4.S	ARM: 7626/1: arm/crypto: Make asm SHA-1 and AES code Thumb-2 compatible	2013-01-13 12:41:22 +00:00
Makefile
sha1_glue.c
sha1-armv4-large.S	ARM: 7626/1: arm/crypto: Make asm SHA-1 and AES code Thumb-2 compatible	2013-01-13 12:41:22 +00:00