[PATCH 19/26] arm: [MVE intrinsics] add vpsel shape

[Christophe Lyon via Gcc-patches]

This patch adds the vpsel shape description.

2022-12-12  Christophe Lyon  <christophe.l...@arm.com>

        gcc/
        * config/arm/arm-mve-builtins-shapes.cc (vpsel): New.
        * config/arm/arm-mve-builtins-shapes.h (vpsel): New.
---
 gcc/config/arm/arm-mve-builtins-shapes.cc | 39 +++++++++++++++++++++++
 gcc/config/arm/arm-mve-builtins-shapes.h  |  1 +
 2 files changed, 40 insertions(+)

diff --git a/gcc/config/arm/arm-mve-builtins-shapes.cc 
b/gcc/config/arm/arm-mve-builtins-shapes.cc
index 43532601fbe..012cf3ef4c0 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.cc
+++ b/gcc/config/arm/arm-mve-builtins-shapes.cc
@@ -1706,6 +1706,45 @@ struct unary_widen_acc_def : public overloaded_base<0>
 };
 SHAPE (unary_widen_acc)
 
+/* <T0>_t vfoo[_t0](<T0>_t, <T0>_t, mve_pred16_t)
+
+   i.e. a version of the standard ternary shape in which
+   the final argument is always a set of predicates.
+
+   Example: vpselq.
+   int16x8_t [__arm_]vpselq[_s16](int16x8_t a, int16x8_t b, mve_pred16_t p)  */
+struct vpsel_def : public overloaded_base<0>
+{
+  void
+  build (function_builder &b, const function_group_info &group,
+        bool preserve_user_namespace) const override
+  {
+    b.add_overloaded_functions (group, MODE_none, preserve_user_namespace);
+    build_all (b, "v0,v0,v0,p", group, MODE_none, preserve_user_namespace);
+  }
+
+  tree
+  resolve (function_resolver &r) const override
+  {
+    unsigned int i, nargs;
+    type_suffix_index type;
+    if (!r.check_gp_argument (3, i, nargs)
+       || (type = r.infer_vector_type (0)) == NUM_TYPE_SUFFIXES)
+      return error_mark_node;
+
+    unsigned int last_arg = i;
+    for (i = 0; i < last_arg; i++)
+      if (!r.require_matching_vector_type (i, type))
+       return error_mark_node;
+
+    if (!r.require_vector_type (2 , VECTOR_TYPE_mve_pred16_t))
+      return error_mark_node;
+
+    return r.resolve_to (r.mode_suffix_id, type);
+  }
+};
+SHAPE (vpsel)
+
 } /* end namespace arm_mve */
 
 #undef SHAPE
diff --git a/gcc/config/arm/arm-mve-builtins-shapes.h 
b/gcc/config/arm/arm-mve-builtins-shapes.h
index f67a484c146..6e818092a87 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.h
+++ b/gcc/config/arm/arm-mve-builtins-shapes.h
@@ -71,6 +71,7 @@ namespace arm_mve
     extern const function_shape *const unary_n;
     extern const function_shape *const unary_widen;
     extern const function_shape *const unary_widen_acc;
+    extern const function_shape *const vpsel;
 
   } /* end namespace arm_mve::shapes */
 } /* end namespace arm_mve */
-- 
2.34.1