diff mbox series

[01/21] aarch64: Generalise require_immediate_lane_index

Message ID mptzfzcthsa.fsf@arm.com
State New
Headers show
Series aarch64: Add support for SME | expand

Commit Message

Richard Sandiford Nov. 17, 2023, 5:24 p.m. UTC 
require_immediate_lane_index previously hard-coded the assumption
that the group size is determined by the argument immediately before
the index.  However, for SME, there are cases where it should be
determined by an earlier argument instead.

gcc/
	* config/aarch64/aarch64-sve-builtins.h:
	(function_checker::require_immediate_lane_index): Add an argument
	for the index of the indexed vector argument.
	* config/aarch64/aarch64-sve-builtins.cc
	(function_checker::require_immediate_lane_index): Likewise.
	* config/aarch64/aarch64-sve-builtins-shapes.cc
	(ternary_bfloat_lane_base::check): Update accordingly.
	(ternary_qq_lane_base::check): Likewise.
	(binary_lane_def::check): Likewise.
	(binary_long_lane_def::check): Likewise.
	(ternary_lane_def::check): Likewise.
	(ternary_lane_rotate_def::check): Likewise.
	(ternary_long_lane_def::check): Likewise.
	(ternary_qq_lane_rotate_def::check): Likewise.
---
 .../aarch64/aarch64-sve-builtins-shapes.cc     | 16 ++++++++--------
 gcc/config/aarch64/aarch64-sve-builtins.cc     | 18 ++++++++++++------
 gcc/config/aarch64/aarch64-sve-builtins.h      |  3 ++-
 3 files changed, 22 insertions(+), 15 deletions(-)
diff mbox series

Patch

diff --git a/gcc/config/aarch64/aarch64-sve-builtins-shapes.cc b/gcc/config/aarch64/aarch64-sve-builtins-shapes.cc
index af816c4c9e7..1646afc7a0d 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins-shapes.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins-shapes.cc
@@ -941,7 +941,7 @@  struct ternary_bfloat_lane_base
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (3, N);
+    return c.require_immediate_lane_index (3, 2, N);
   }
 };
 
@@ -956,7 +956,7 @@  struct ternary_qq_lane_base
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (3, 4);
+    return c.require_immediate_lane_index (3, 0);
   }
 };
 
@@ -1123,7 +1123,7 @@  struct binary_lane_def : public overloaded_base<0>
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (2);
+    return c.require_immediate_lane_index (2, 1);
   }
 };
 SHAPE (binary_lane)
@@ -1162,7 +1162,7 @@  struct binary_long_lane_def : public overloaded_base<0>
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (2);
+    return c.require_immediate_lane_index (2, 1);
   }
 };
 SHAPE (binary_long_lane)
@@ -2817,7 +2817,7 @@  struct ternary_lane_def : public overloaded_base<0>
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (3);
+    return c.require_immediate_lane_index (3, 2);
   }
 };
 SHAPE (ternary_lane)
@@ -2845,7 +2845,7 @@  struct ternary_lane_rotate_def : public overloaded_base<0>
   bool
   check (function_checker &c) const override
   {
-    return (c.require_immediate_lane_index (3, 2)
+    return (c.require_immediate_lane_index (3, 2, 2)
 	    && c.require_immediate_one_of (4, 0, 90, 180, 270));
   }
 };
@@ -2868,7 +2868,7 @@  struct ternary_long_lane_def
   bool
   check (function_checker &c) const override
   {
-    return c.require_immediate_lane_index (3);
+    return c.require_immediate_lane_index (3, 2);
   }
 };
 SHAPE (ternary_long_lane)
@@ -2965,7 +2965,7 @@  struct ternary_qq_lane_rotate_def : public overloaded_base<0>
   bool
   check (function_checker &c) const override
   {
-    return (c.require_immediate_lane_index (3, 4)
+    return (c.require_immediate_lane_index (3, 0)
 	    && c.require_immediate_one_of (4, 0, 90, 180, 270));
   }
 };
diff --git a/gcc/config/aarch64/aarch64-sve-builtins.cc b/gcc/config/aarch64/aarch64-sve-builtins.cc
index 161a14edde7..75a51565ed2 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins.cc
+++ b/gcc/config/aarch64/aarch64-sve-builtins.cc
@@ -2440,20 +2440,26 @@  function_checker::require_immediate_enum (unsigned int rel_argno, tree type)
   return false;
 }
 
-/* Check that argument REL_ARGNO is suitable for indexing argument
-   REL_ARGNO - 1, in groups of GROUP_SIZE elements.  REL_ARGNO counts
-   from the end of the predication arguments.  */
+/* The intrinsic conceptually divides vector argument REL_VEC_ARGNO into
+   groups of GROUP_SIZE elements.  Return true if argument REL_ARGNO is
+   a suitable constant index for selecting one of these groups.  The
+   selection happens within a 128-bit quadword, rather than the whole vector.
+
+   REL_ARGNO and REL_VEC_ARGNO count from the end of the predication
+   arguments.  */
 bool
 function_checker::require_immediate_lane_index (unsigned int rel_argno,
+						unsigned int rel_vec_argno,
 						unsigned int group_size)
 {
   unsigned int argno = m_base_arg + rel_argno;
   if (!argument_exists_p (argno))
     return true;
 
-  /* Get the type of the previous argument.  tree_argument_type wants a
-     1-based number, whereas ARGNO is 0-based.  */
-  machine_mode mode = TYPE_MODE (type_argument_type (m_fntype, argno));
+  /* Get the type of the vector argument.  tree_argument_type wants a
+     1-based number, whereas VEC_ARGNO is 0-based.  */
+  unsigned int vec_argno = m_base_arg + rel_vec_argno;
+  machine_mode mode = TYPE_MODE (type_argument_type (m_fntype, vec_argno + 1));
   gcc_assert (VECTOR_MODE_P (mode));
   unsigned int nlanes = 128 / (group_size * GET_MODE_UNIT_BITSIZE (mode));
   return require_immediate_range (rel_argno, 0, nlanes - 1);
diff --git a/gcc/config/aarch64/aarch64-sve-builtins.h b/gcc/config/aarch64/aarch64-sve-builtins.h
index a301570b82e..99bfd906a07 100644
--- a/gcc/config/aarch64/aarch64-sve-builtins.h
+++ b/gcc/config/aarch64/aarch64-sve-builtins.h
@@ -463,7 +463,8 @@  public:
   bool require_immediate_either_or (unsigned int, HOST_WIDE_INT,
 				    HOST_WIDE_INT);
   bool require_immediate_enum (unsigned int, tree);
-  bool require_immediate_lane_index (unsigned int, unsigned int = 1);
+  bool require_immediate_lane_index (unsigned int, unsigned int,
+				     unsigned int = 1);
   bool require_immediate_one_of (unsigned int, HOST_WIDE_INT, HOST_WIDE_INT,
 				 HOST_WIDE_INT, HOST_WIDE_INT);
   bool require_immediate_range (unsigned int, HOST_WIDE_INT, HOST_WIDE_INT);