Mesa (master): glsl: add cl_size and cl_alignment

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Module: Mesa
Branch: master
Commit: 44d32e62fb8d1fa9bf22c136aa41114d19b2d874
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=44d32e62fb8d1fa9bf22c136aa41114d19b2d874

Author: Karol Herbst <kherbst at redhat.com>
Date:   Mon Mar  5 15:04:32 2018 +0100

glsl: add cl_size and cl_alignment

Signed-off-by: Karol Herbst <kherbst at redhat.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund at collabora.com>

---

 src/compiler/glsl_types.cpp | 48 +++++++++++++++++++++++++++++++++++++++++++++
 src/compiler/glsl_types.h   | 47 ++++++++++++++++++++++++++++++++++++++++++++
 src/compiler/nir_types.cpp  | 12 ++++++++++++
 src/compiler/nir_types.h    | 36 +++++-----------------------------
 4 files changed, 112 insertions(+), 31 deletions(-)

diff --git a/src/compiler/glsl_types.cpp b/src/compiler/glsl_types.cpp
index 899dd16878e..90517a5b52f 100644
--- a/src/compiler/glsl_types.cpp
+++ b/src/compiler/glsl_types.cpp
@@ -2554,3 +2554,51 @@ decode_type_from_blob(struct blob_reader *blob)
       return NULL;
    }
 }
+
+unsigned
+glsl_type::cl_alignment() const
+{
+   /* vectors unlike arrays are aligned to their size */
+   if (this->is_scalar() || this->is_vector())
+      return this->cl_size();
+   else if (this->is_array())
+      return this->without_array()->cl_alignment();
+   else if (this->is_struct()) {
+      /* Packed Structs are 0x1 aligned despite their size. */
+      if (this->packed)
+         return 1;
+
+      unsigned res = 1;
+      for (unsigned i = 0; i < this->length; ++i) {
+         struct glsl_struct_field &field = this->fields.structure[i];
+         res = MAX2(res, field.type->cl_alignment());
+      }
+      return res;
+   }
+   return 1;
+}
+
+unsigned
+glsl_type::cl_size() const
+{
+   if (this->is_scalar()) {
+      return glsl_base_type_get_bit_size(this->base_type) / 8;
+   } else if (this->is_vector()) {
+      unsigned vec_elemns = this->vector_elements == 3 ? 4 : this->vector_elements;
+      return vec_elemns * glsl_base_type_get_bit_size(this->base_type) / 8;
+   } else if (this->is_array()) {
+      unsigned size = this->without_array()->cl_size();
+      return size * this->length;
+   } else if (this->is_struct()) {
+      unsigned size = 0;
+      for (unsigned i = 0; i < this->length; ++i) {
+         struct glsl_struct_field &field = this->fields.structure[i];
+         /* if a struct is packed, members don't get aligned */
+         if (!this->packed)
+            size = align(size, field.type->cl_alignment());
+         size += field.type->cl_size();
+      }
+      return size;
+   }
+   return 1;
+}
diff --git a/src/compiler/glsl_types.h b/src/compiler/glsl_types.h
index fb46c67b84e..1a774adb64e 100644
--- a/src/compiler/glsl_types.h
+++ b/src/compiler/glsl_types.h
@@ -31,6 +31,7 @@
 #include "shader_enums.h"
 #include "blob.h"
 #include "c11/threads.h"
+#include "util/macros.h"
 
 #ifdef __cplusplus
 #include "main/config.h"
@@ -114,6 +115,42 @@ static inline bool glsl_base_type_is_integer(enum glsl_base_type type)
           type == GLSL_TYPE_IMAGE;
 }
 
+static inline unsigned int
+glsl_base_type_get_bit_size(const enum glsl_base_type base_type)
+{
+   switch (base_type) {
+   case GLSL_TYPE_BOOL:
+      return 1;
+
+   case GLSL_TYPE_INT:
+   case GLSL_TYPE_UINT:
+   case GLSL_TYPE_FLOAT: /* TODO handle mediump */
+   case GLSL_TYPE_SUBROUTINE:
+      return 32;
+
+   case GLSL_TYPE_FLOAT16:
+   case GLSL_TYPE_UINT16:
+   case GLSL_TYPE_INT16:
+      return 16;
+
+   case GLSL_TYPE_UINT8:
+   case GLSL_TYPE_INT8:
+      return 8;
+
+   case GLSL_TYPE_DOUBLE:
+   case GLSL_TYPE_INT64:
+   case GLSL_TYPE_UINT64:
+   case GLSL_TYPE_IMAGE:
+   case GLSL_TYPE_SAMPLER:
+      return 64;
+
+   default:
+      unreachable("unknown base type");
+   }
+
+   return 0;
+}
+
 enum glsl_sampler_dim {
    GLSL_SAMPLER_DIM_1D = 0,
    GLSL_SAMPLER_DIM_2D,
@@ -455,6 +492,16 @@ public:
    const glsl_type *get_explicit_interface_type(bool supports_std430) const;
 
    /**
+    * Alignment in bytes of the start of this type in OpenCL memory.
+    */
+   unsigned cl_alignment() const;
+
+   /**
+    * Size in bytes of this type in OpenCL memory
+    */
+   unsigned cl_size() const;
+
+   /**
     * \brief Can this type be implicitly converted to another?
     *
     * \return True if the types are identical or if this type can be converted
diff --git a/src/compiler/nir_types.cpp b/src/compiler/nir_types.cpp
index 96b824e5141..d3e5520cd98 100644
--- a/src/compiler/nir_types.cpp
+++ b/src/compiler/nir_types.cpp
@@ -667,3 +667,15 @@ glsl_contains_atomic(const struct glsl_type *type)
 {
    return type->contains_atomic();
 }
+
+int
+glsl_get_cl_size(const struct glsl_type *type)
+{
+   return type->cl_size();
+}
+
+int
+glsl_get_cl_alignment(const struct glsl_type *type)
+{
+   return type->cl_alignment();
+}
diff --git a/src/compiler/nir_types.h b/src/compiler/nir_types.h
index 1e8fa33a9aa..eeba445a3ba 100644
--- a/src/compiler/nir_types.h
+++ b/src/compiler/nir_types.h
@@ -98,40 +98,14 @@ unsigned glsl_get_struct_location_offset(const struct glsl_type *type,
 
 unsigned glsl_atomic_size(const struct glsl_type *type);
 
+int glsl_get_cl_size(const struct glsl_type *type);
+
+int glsl_get_cl_alignment(const struct glsl_type *type);
+
 static inline unsigned
 glsl_get_bit_size(const struct glsl_type *type)
 {
-   switch (glsl_get_base_type(type)) {
-   case GLSL_TYPE_BOOL:
-      return 1;
-
-   case GLSL_TYPE_INT:
-   case GLSL_TYPE_UINT:
-   case GLSL_TYPE_FLOAT: /* TODO handle mediump */
-   case GLSL_TYPE_SUBROUTINE:
-      return 32;
-
-   case GLSL_TYPE_FLOAT16:
-   case GLSL_TYPE_UINT16:
-   case GLSL_TYPE_INT16:
-      return 16;
-
-   case GLSL_TYPE_UINT8:
-   case GLSL_TYPE_INT8:
-      return 8;
-
-   case GLSL_TYPE_DOUBLE:
-   case GLSL_TYPE_INT64:
-   case GLSL_TYPE_UINT64:
-   case GLSL_TYPE_IMAGE:
-   case GLSL_TYPE_SAMPLER:
-      return 64;
-
-   default:
-      unreachable("unknown base type");
-   }
-
-   return 0;
+   return glsl_base_type_get_bit_size(glsl_get_base_type(type));
 }
 
 bool glsl_type_is_16bit(const struct glsl_type *type);