Ping. Thanks, Kyrill
On 13/11/15 11:50, Kyrill Tkachov wrote:
Ping. https://gcc.gnu.org/ml/gcc-patches/2015-11/msg00686.html Thanks, Kyrill On 06/11/15 17:05, Kyrill Tkachov wrote:Hi all, This patch introduces support for the smmul, smmla and smmls instructions that appear in armv6 architecture levels and higher. To quote the SMMUL description from the ARMARM: "Signed Most Significant Word Multiply multiplies two signed 32-bit values, extracts the most significant 32 bits of the result, and writes those bits to the destination register." The smmla and smmls are the multiply-accumulate and multiply-subtract extensions of that multiply. There also exists an smmulr variant that rounds the result rather than truncating it. However, when I tried adding patterns for those forms I got an LRA ICE that I was not able to figure out. I'll try to find a testcase for that, but in the meantime there's no reason to not have patterns for the non-rounding variants. Bootstrapped and tested on arm-none-linux-gnueabihf. I've seen this trigger in quite a few places in SPEC2006 where it always made the code better. Ok for trunk? Thanks, Kyrill 2015-11-06 Kyrylo Tkachov <kyrylo.tkac...@arm.com> PR target/49526 * config/arm/arm.md (*mulsidi3si_v6): New pattern. (*mulsidi3siaddsi_v6): Likewise. (*mulsidi3sisubsi_v6): Likewise. * config/arm/predicates.md (subreg_highpart_operator): New predicate. 2015-11-06 Kyrylo Tkachov <kyrylo.tkac...@arm.com> PR target/49526 * gcc.target/arm/pr49526_1.c: New test. * gcc.target/arm/pr49526_2.c: Likewise. * gcc.target/arm/pr49526_3.c: Likewise.
