[PATCH 15/20] arm: [MVE intrinsics] add unary_acc shape

[Christophe Lyon <christophe.lyon@arm.com>]

This patch adds the unary_acc shape description.

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

	gcc/
	* config/arm/arm-mve-builtins-shapes.cc (unary_acc): New.
	* config/arm/arm-mve-builtins-shapes.h (unary_acc): New.
---
 gcc/config/arm/arm-mve-builtins-shapes.cc | 28 +++++++++++++++++++++++
 gcc/config/arm/arm-mve-builtins-shapes.h  |  1 +
 2 files changed, 29 insertions(+)

diff --git a/gcc/config/arm/arm-mve-builtins-shapes.cc b/gcc/config/arm/arm-mve-builtins-shapes.cc
index bff1c3e843b..e77a0cc20ac 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.cc
+++ b/gcc/config/arm/arm-mve-builtins-shapes.cc
@@ -1066,6 +1066,34 @@ struct unary_def : public overloaded_base<0>
 };
 SHAPE (unary)
 
+/* <S0:twice>_t vfoo[_<t0>](<T0>_t)
+
+   i.e. a version of "unary" in which the source elements are half the
+   size of the destination scalar, but have the same type class.
+
+   Example: vaddlvq.
+   int64_t [__arm_]vaddlvq[_s32](int32x4_t a)
+   int64_t [__arm_]vaddlvq_p[_s32](int32x4_t a, mve_pred16_t p) */
+struct unary_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,v0", group, MODE_none, preserve_user_namespace);
+  }
+
+  tree
+  resolve (function_resolver &r) const override
+  {
+    /* FIXME: check that the return value is actually
+       twice as wide as arg 0.  */
+    return r.resolve_unary ();
+  }
+};
+SHAPE (unary_acc)
+
 /* <T0>_t foo_t0[_t1](<T1>_t)
 
    where the target type <t0> must be specified explicitly but the source
diff --git a/gcc/config/arm/arm-mve-builtins-shapes.h b/gcc/config/arm/arm-mve-builtins-shapes.h
index fc1bacbd4da..c062fe624c4 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.h
+++ b/gcc/config/arm/arm-mve-builtins-shapes.h
@@ -53,6 +53,7 @@ namespace arm_mve
     extern const function_shape *const create;
     extern const function_shape *const inherent;
     extern const function_shape *const unary;
+    extern const function_shape *const unary_acc;
     extern const function_shape *const unary_convert;
     extern const function_shape *const unary_int32;
     extern const function_shape *const unary_int32_acc;
-- 
2.34.1