tree 755f6daed65807566581e79c471bc5fd3205c31b
parent 01655daeee601db7cd327ffb8e3b3f75bc1b980f
author Aurelien Jarno <aurelien@aurel32.net> 1541202366 +0100
committer Gilles Peskine <Gilles.Peskine@arm.com> 1564834734 +0200

bn_mul.h: require at least ARMv6 to enable the ARM DSP code

Commit 16b1bd89326e "bn_mul.h: add ARM DSP optimized MULADDC code"
added some ARM DSP instructions that was assumed to always be available
when __ARM_FEATURE_DSP is defined to 1. Unfortunately it appears that
the ARMv5TE architecture (GCC flag -march=armv5te) supports the DSP
instructions, but only in Thumb mode and not in ARM mode, despite
defining __ARM_FEATURE_DSP in both cases.

This patch fixes the build issue by requiring at least ARMv6 in addition
to the DSP feature.