RISC-V: Refine the code gen for ceil auto vectorization.

We vectorized below ceil code already.

void
test_ceil (float *out, float *in, int count)
{
  for (unsigned i = 0; i < count; i++)
    out[i] = __builtin_ceilf (in[i]);
}

Before this patch:
vfmv.v.x    v4,fa0     // can be removed
vfabs.v     v0,v1
vmv1r.v     v2,v1      // can be removed
vmflt.vv    v0,v0,v4   // can be refined to vmflt.vf
vfcvt.x.f.v v3,v1,v0.t
vfcvt.f.x.v v2,v3,v0.t
vfsgnj.vv   v2,v2,v1

After this patch:
vfabs.v     v1,v2
vmflt.vf    v0,v1,fa5
vfcvt.x.f.v v3,v2,v0.t
vfcvt.f.x.v v1,v3,v0.t
vfsgnj.vv   v1,v1,v2

We can generate better code include below items.

* Remove vfmv.v.f.
* Take vmflt.vf instead of vmflt.vv.
* Remove vmv1r.v.

gcc/ChangeLog:

	* config/riscv/riscv-v.cc (expand_vec_float_cmp_mask): Refactor.
	(emit_vec_float_cmp_mask): Rename.
	(expand_vec_copysign): Ditto.
	(emit_vec_copysign): Ditto.
	(emit_vec_abs): New function impl.
	(emit_vec_cvt_x_f): Ditto.
	(emit_vec_cvt_f_x): Ditto.
	(expand_vec_ceil): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/unop/math-ceil-0.c: Adjust body check.
	* gcc.target/riscv/rvv/autovec/unop/math-ceil-1.c: Ditto.
	* gcc.target/riscv/rvv/autovec/unop/math-ceil-2.c: Ditto.
	* gcc.target/riscv/rvv/autovec/unop/math-ceil-3.c: Ditto.

Signed-off-by: Pan Li <pan2.li@intel.com>

0 files changed, 0 insertions, 0 deletions