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[Bug target/51980] ARM - Neon code polluted by useless stores to the stack with vuzpq / vzipq / vtrnq
- From: "christophe.lyon at st dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 13 Jun 2014 15:37:53 +0000
- Subject: [Bug target/51980] ARM - Neon code polluted by useless stores to the stack with vuzpq / vzipq / vtrnq
- Auto-submitted: auto-generated
- References: <bug-51980-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51980
christophe.lyon at st dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |christophe.lyon at st dot com
--- Comment #14 from christophe.lyon at st dot com ---
As of current trunk the softfp case looks like this:
sqrlen4D_16u8:
vmov d16, r0, r1 @ v16qi
vmov d17, r2, r3
vld1.64 {d18-d19}, [sp:64]
vabd.u8 q9, q8, q9
vmull.u8 q8, d18, d18
vmull.u8 q9, d19, d19
vuzp.32 q8, q9
vpaddl.u16 q8, q8
vpadal.u16 q8, q9
vmov r0, r1, d16 @ v4si
vmov r2, r3, d17
bx lr
which looks quite good.