[PATCH 18/23] arm: [MVE intrinsics] add binary_rshift_narrow_unsigned shape

[Christophe Lyon via Gcc-patches]

This patch adds the binary_rshift_narrow_unsigned shape description.

2022-09-08  Christophe Lyon  <christophe.l...@arm.com>

        gcc/
        * config/arm/arm-mve-builtins-shapes.cc
        (binary_rshift_narrow_unsigned): New.
        * config/arm/arm-mve-builtins-shapes.h
        (binary_rshift_narrow_unsigned): New.
---
 gcc/config/arm/arm-mve-builtins-shapes.cc | 48 +++++++++++++++++++++++
 gcc/config/arm/arm-mve-builtins-shapes.h  |  1 +
 2 files changed, 49 insertions(+)

diff --git a/gcc/config/arm/arm-mve-builtins-shapes.cc 
b/gcc/config/arm/arm-mve-builtins-shapes.cc
index 88934e1ca15..e3bf586565c 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.cc
+++ b/gcc/config/arm/arm-mve-builtins-shapes.cc
@@ -664,6 +664,54 @@ struct binary_rshift_narrow_def : public overloaded_base<0>
 };
 SHAPE (binary_rshift_narrow)
 
+/* <uT0:half>_t vfoo[_n_t0](<uT0:half>_t, <T0>_t, const int)
+
+   Vector saturating rounding shift right and narrow.
+   Check that 'imm' is in the [1..#bits/2] range.
+
+   Example: vqshrunbq.
+   uint8x16_t [__arm_]vqshrunbq[_n_s16](uint8x16_t a, int16x8_t b, const int 
imm)
+   uint8x16_t [__arm_]vqshrunbq_m[_n_s16](uint8x16_t a, int16x8_t b, const int 
imm, mve_pred16_t p)  */
+struct binary_rshift_narrow_unsigned_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_n, preserve_user_namespace);
+    build_all (b, "vhu0,vhu0,v0,ss32", group, MODE_n, 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 (1)) == NUM_TYPE_SUFFIXES
+       || !r.require_integer_immediate (i))
+      return error_mark_node;
+
+    type_suffix_index narrow_suffix
+      = find_type_suffix (TYPE_unsigned,
+                         type_suffixes[type].element_bits / 2);
+
+    if (!r.require_matching_vector_type (0, narrow_suffix))
+      return error_mark_node;
+
+    return r.resolve_to (r.mode_suffix_id, type);
+  }
+
+  bool
+  check (function_checker &c) const override
+  {
+    unsigned int bits = c.type_suffix (0).element_bits;
+    return c.require_immediate_range (2, 1, bits / 2);
+  }
+
+};
+SHAPE (binary_rshift_narrow_unsigned)
+
 /* <T0>xN_t vfoo[_t0](uint64_t, uint64_t)
 
    where there are N arguments in total.
diff --git a/gcc/config/arm/arm-mve-builtins-shapes.h 
b/gcc/config/arm/arm-mve-builtins-shapes.h
index d72686d187b..ca1c1017e8e 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.h
+++ b/gcc/config/arm/arm-mve-builtins-shapes.h
@@ -41,6 +41,7 @@ namespace arm_mve
     extern const function_shape *const binary_orrq;
     extern const function_shape *const binary_round_lshift;
     extern const function_shape *const binary_rshift_narrow;
+    extern const function_shape *const binary_rshift_narrow_unsigned;
     extern const function_shape *const create;
     extern const function_shape *const inherent;
     extern const function_shape *const unary_convert;
-- 
2.34.1