[PATCH 02/24] arm: [MVE intrinsics] add unary_widen_acc shape

[Christophe Lyon via Gcc-patches]

This patch adds the unary_widen_acc shape description.

2022-10-25  Christophe Lyon  <christophe.l...@arm.com>

        gcc/
        * config/arm/arm-mve-builtins-shapes.cc (unary_widen_acc): New.
        * config/arm/arm-mve-builtins-shapes.h (unary_widen_acc): New.
---
 gcc/config/arm/arm-mve-builtins-shapes.cc | 34 +++++++++++++++++++++++
 gcc/config/arm/arm-mve-builtins-shapes.h  |  1 +
 2 files changed, 35 insertions(+)

diff --git a/gcc/config/arm/arm-mve-builtins-shapes.cc 
b/gcc/config/arm/arm-mve-builtins-shapes.cc
index ae73fc6b1b7..a7faf8299cb 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.cc
+++ b/gcc/config/arm/arm-mve-builtins-shapes.cc
@@ -1282,6 +1282,40 @@ struct unary_widen_def : public overloaded_base<0>
 };
 SHAPE (unary_widen)
 
+/* <S0:twice>_t vfoo[_<t0>](<S0:twice>_t, <T0>_t)
+
+   i.e. a version of "unary" in which the source elements are half the
+   size of the destination scalar and accumulator, but have the same
+   type class.
+
+   Example: vaddlvaq.
+   int64_t [__arm_]vaddlvaq[_s32](int64_t a, int32x4_t b)
+   int64_t [__arm_]vaddlvaq_p[_s32](int64_t a, int32x4_t b, mve_pred16_t p)  */
+struct unary_widen_acc_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, "sw0,sw0,v0", 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 (2, i, nargs)
+       || !r.require_derived_scalar_type (0, r.SAME_TYPE_CLASS)
+       || (type = r.infer_vector_type (i)) == NUM_TYPE_SUFFIXES)
+      return error_mark_node;
+
+    return r.resolve_to (r.mode_suffix_id, type);
+  }
+};
+SHAPE (unary_widen_acc)
+
 } /* 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 5a8d9fe2b2d..46cc26ef918 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.h
+++ b/gcc/config/arm/arm-mve-builtins-shapes.h
@@ -59,6 +59,7 @@ namespace arm_mve
     extern const function_shape *const unary_int32_acc;
     extern const function_shape *const unary_n;
     extern const function_shape *const unary_widen;
+    extern const function_shape *const unary_widen_acc;
 
   } /* end namespace arm_mve::shapes */
 } /* end namespace arm_mve */
-- 
2.34.1