> -----Original Message-----
> From: Tamar Christina <tamar.christ...@arm.com>
> Sent: 25 September 2020 15:31
> To: gcc-patches@gcc.gnu.org
> Cc: nd <n...@arm.com>; Ramana Radhakrishnan
> <ramana.radhakrish...@arm.com>; Richard Earnshaw
> <richard.earns...@arm.com>; ni...@redhat.com; Kyrylo Tkachov
> <kyrylo.tkac...@arm.com>
> Subject: [PATCH v2 14/16]Arm: Add NEON RTL patterns for Complex Addition,
> Multiply and FMA.
>
> Hi All,
>
> This adds implementation for the optabs for complex additions. With this
> the
> following C code:
>
> void f90 (float complex a[restrict N], float complex b[restrict N],
> float complex c[restrict N])
> {
> for (int i=0; i < N; i++)
> c[i] = a[i] + (b[i] * I);
> }
>
> generates
>
> f90:
> add r3, r2, #1600
> .L2:
> vld1.32 {q8}, [r0]!
> vld1.32 {q9}, [r1]!
> vcadd.f32 q8, q8, q9, #90
> vst1.32 {q8}, [r2]!
> cmp r3, r2
> bne .L2
> bx lr
>
>
> instead of
>
> f90:
> add r3, r2, #1600
> .L2:
> vld2.32 {d24-d27}, [r0]!
> vld2.32 {d20-d23}, [r1]!
> vsub.f32 q8, q12, q11
> vadd.f32 q9, q13, q10
> vst2.32 {d16-d19}, [r2]!
> cmp r3, r2
> bne .L2
> bx lr
>
>
> Bootstrapped Regtested on arm-none-linux-gnueabihf and no issues.
>
> Ok for master?
>
Ok.
Thanks,
Kyrill
> Thanks,
> Tamar
>
> gcc/ChangeLog:
>
> * config/arm/iterators.md (rot): Add UNSPEC_VCMLS,
> UNSPEC_VCMUL and
> UNSPEC_VCMUL180.
> (rot_op, rotsplit1, rotsplit2, fcmac1, VCMLA_OP, VCMUL_OP): New.
> * config/arm/neon.md (cadd<rot><mode>3,
> cml<fcmac1><rot_op><mode>4,
> cmul<rot_op><mode>3): New.
> * config/arm/unspecs.md (UNSPEC_VCMUL, UNSPEC_VCMUL180,
> UNSPEC_VCMLS,
> UNSPEC_VCMLS180): New.
>
> --
