[PATCH 21/26] arm: [MVE intrinsics] add ternary_lshift shape

[Christophe Lyon via Gcc-patches]

This patch adds the ternary_lshift shape description.

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

        gcc/
        * config/arm/arm-mve-builtins-shapes.cc (ternary_lshift): New.
        * config/arm/arm-mve-builtins-shapes.h (ternary_lshift): New.
---
 gcc/config/arm/arm-mve-builtins-shapes.cc | 38 +++++++++++++++++++++++
 gcc/config/arm/arm-mve-builtins-shapes.h  |  1 +
 2 files changed, 39 insertions(+)

diff --git a/gcc/config/arm/arm-mve-builtins-shapes.cc 
b/gcc/config/arm/arm-mve-builtins-shapes.cc
index 012cf3ef4c0..a8e94b4f8f8 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.cc
+++ b/gcc/config/arm/arm-mve-builtins-shapes.cc
@@ -1372,6 +1372,44 @@ struct ternary_def : public overloaded_base<0>
 };
 SHAPE (ternary)
 
+/* <T0>_t vfoo[_t0](<T0>_t, <T0>_t, const int)
+
+   i.e. ternary operations that operate on a pair of vectors of the
+   same type as the destination, and take a third integer argument.
+
+   Check that 'imm' is in the [0..#bits-1] range.
+
+   Example: vsliq.
+   int16x8_t [__arm_]vsliq[_n_s16](int16x8_t a, int16x8_t b, const int imm)
+   int16x8_t [__arm_]vsliq_m[_n_s16](int16x8_t a, int16x8_t b, const int imm, 
mve_pred16_t p)  */
+struct ternary_lshift_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, "v0,v0,v0,ss32", group, MODE_n, preserve_user_namespace);
+  }
+
+  tree
+  resolve (function_resolver &r) const override
+  {
+    return r.resolve_uniform (2, 1);
+  }
+
+  bool
+  check (function_checker &c) const override
+  {
+    if (c.mode_suffix_id != MODE_n)
+      return true;
+
+    unsigned int bits = c.type_suffix (0).element_bits;
+    return c.require_immediate_range (2, 0, bits - 1);
+  }
+};
+SHAPE (ternary_lshift)
+
 /* <T0>_t vfoo[_n_t0](<T0>_t, <T0>_t, <S0>_t)
 
    i.e. the standard shape for ternary operations that operate on a
diff --git a/gcc/config/arm/arm-mve-builtins-shapes.h 
b/gcc/config/arm/arm-mve-builtins-shapes.h
index 6e818092a87..73375186d82 100644
--- a/gcc/config/arm/arm-mve-builtins-shapes.h
+++ b/gcc/config/arm/arm-mve-builtins-shapes.h
@@ -61,6 +61,7 @@ namespace arm_mve
     extern const function_shape *const inherent;
     extern const function_shape *const mvn;
     extern const function_shape *const ternary;
+    extern const function_shape *const ternary_lshift;
     extern const function_shape *const ternary_n;
     extern const function_shape *const ternary_opt_n;
     extern const function_shape *const unary;
-- 
2.34.1