On 11/09/14 14:43, Christophe Lyon wrote:
Hi Jiong,
On 9 September 2014 12:59, Ramana Radhakrishnan
<ramana....@googlemail.com> wrote:
On Mon, Aug 18, 2014 at 11:31 AM, Jiong Wang <jiong.w...@arm.com> wrote:
this patch enable auto-vectorization for copysignf by using vector
bit selection instruction on arm32 when neon available.
I've noticed that your new testcase fails (the scan-tree-dump-times
line), in the following cases:
* forcing -march=armv5t in RUNTESTFLAGS (targets
arm-none-linux-gnueabi and arm-none-linux-gnueabihf)
* target armeb-none-linux-gnueabihf
You can have a look at:
http://cbuild.validation.linaro.org/build/cross-validation/gcc/trunk/215067/report-build-info.html
If you go 1 level up at
http://cbuild.validation.linaro.org/build/cross-validation/gcc/trunk/215067/
you'll be able to browse into the per-target subdirs and get the .sum
files if you need them.
Christophe,
the auto-test system is great!
the testcase only pass when both hardware & abi options meet requirement.
I tried to skip those environment where neon is not available by
"dg-require-effective-target arm_neon_hw"
there maybe something not covered. I'll have a look.
thanks.
-- Jiong
Christophe.
for a simple testcase:
for (i = 0; i < N; i++)
r[i] = __builtin_copysignf (a[i], b[i]);
assuming vector factor be 4, the generated instruction sequences is:
vmov.i32 q10, #2147483648 @ v4si
.L2:
vld1.64 {d18-d19}, [ip:64]
add r3, r3, #16
add ip, ip, #16
vldr d16, [r3, #-16]
vldr d17, [r3, #-8]
vbif q8, q9, q10
Ok.
Ramana
thanks.
gcc/
* config/arm/arm.c (NEON_COPYSIGNF): New enum.
(arm_init_neon_builtins): Support NEON_COPYSIGNF.
(arm_builtin_vectorized_function): Likewise.
* config/arm/arm_neon_builtins.def: New macro for copysignf.
* config/arm/neon.md (neon_copysignf<mode>): New pattern for vector
copysignf.
gcc/testsuite/
* gcc.target/arm/vect-copysignf.c: New testcase.
