https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101325
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Christophe Lyon <cl...@gcc.gnu.org>: https://gcc.gnu.org/g:91224cf625dc90304bb515a0cc602beed48fe3da commit r12-7339-g91224cf625dc90304bb515a0cc602beed48fe3da Author: Christophe Lyon <christophe.l...@arm.com> Date: Wed Oct 13 09:16:27 2021 +0000 arm: Implement auto-vectorized MVE comparisons with vectors of boolean predicates We make use of qualifier_predicate to describe MVE builtins prototypes, restricting to auto-vectorizable vcmp* and vpsel builtins, as they are exercised by the tests added earlier in the series. Special handling is needed for mve_vpselq because it has a v2di variant, which has no natural VPR.P0 representation: we keep HImode for it. The vector_compare expansion code is updated to use the right VxBI mode instead of HI for the result. We extend the existing thumb2_movhi_vfp and thumb2_movhi_fp16 patterns to use the new MVE_7_HI iterator which covers HI and the new VxBI modes, in conjunction with the new DB constraint for a constant vector of booleans. This patch also adds tests derived from the one provided in PR target/101325: there is a compile-only test because I did not have access to anything that could execute MVE code until recently. I have been able to add an executable test since QEMU supports MVE. Instead of adding arm_v8_1m_mve_hw, I update arm_mve_hw so that it uses add_options_for_arm_v8_1m_mve_fp, like arm_neon_hw does. This ensures arm_mve_hw passes even if the toolchain does not generate MVE code by default. Most of the work of this patch series was carried out while I was working at STMicroelectronics as a Linaro assignee. 2022-02-22 Christophe Lyon <christophe.l...@arm.com> Richard Sandiford <richard.sandif...@arm.com> gcc/ PR target/100757 PR target/101325 * config/arm/arm-builtins.cc (BINOP_PRED_UNONE_UNONE_QUALIFIERS) (BINOP_PRED_NONE_NONE_QUALIFIERS) (TERNOP_NONE_NONE_NONE_PRED_QUALIFIERS) (TERNOP_UNONE_UNONE_UNONE_PRED_QUALIFIERS): New. * config/arm/arm-protos.h (mve_bool_vec_to_const): New. * config/arm/arm.cc (arm_hard_regno_mode_ok): Handle new VxBI modes. (arm_mode_to_pred_mode): New. (arm_expand_vector_compare): Use the right VxBI mode instead of HI. (arm_expand_vcond): Likewise. (simd_valid_immediate): Handle MODE_VECTOR_BOOL. (mve_bool_vec_to_const): New. (neon_make_constant): Call mve_bool_vec_to_const when needed. * config/arm/arm_mve_builtins.def (vcmpneq_, vcmphiq_, vcmpcsq_) (vcmpltq_, vcmpleq_, vcmpgtq_, vcmpgeq_, vcmpeqq_, vcmpneq_f) (vcmpltq_f, vcmpleq_f, vcmpgtq_f, vcmpgeq_f, vcmpeqq_f, vpselq_u) (vpselq_s, vpselq_f): Use new predicated qualifiers. * config/arm/constraints.md (DB): New. * config/arm/iterators.md (MVE_7, MVE_7_HI): New mode iterators. (MVE_VPRED, MVE_vpred): New attribute iterators. * config/arm/mve.md (@mve_vcmp<mve_cmp_op>q_<mode>) (@mve_vcmp<mve_cmp_op>q_f<mode>, @mve_vpselq_<supf><mode>) (@mve_vpselq_f<mode>): Use MVE_VPRED instead of HI. (@mve_vpselq_<supf>v2di): Define separately. (mov<mode>): New expander for VxBI modes. * config/arm/vfp.md (thumb2_movhi_vfp, thumb2_movhi_fp16): Use MVE_7_HI iterator and add support for DB constraint. gcc/testsuite/ PR target/100757 PR target/101325 * gcc.dg/rtl/arm/mve-vxbi.c: New test. * gcc.target/arm/simd/pr101325.c: New. * gcc.target/arm/simd/pr101325-2.c: New. * lib/target-supports.exp (check_effective_target_arm_mve_hw): Use add_options_for_arm_v8_1m_mve_fp.
