From 00474731a90add7c0aaffc3a76d713ae2cecdbbe Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 21 Mar 2024 21:10:48 -0700
Subject: Partially implement vk_buffer_ref proposal. (#3814)

---
 source/slang/hlsl.meta.slang | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'source/slang/hlsl.meta.slang')

diff --git a/source/slang/hlsl.meta.slang b/source/slang/hlsl.meta.slang
index b660437d9..d2dfe6267 100644
--- a/source/slang/hlsl.meta.slang
+++ b/source/slang/hlsl.meta.slang
@@ -13912,6 +13912,41 @@ extension __TextureImpl<float, Shape, 0, 0, 0, $(kStdlibResourceAccessReadWrite)
 
 // Buffer Pointer
 
+namespace vk
+{
+    // Partial implementation of the vk::buffer_ref proposal:
+    // https://github.com/microsoft/hlsl-specs/blob/main/proposals/0010-vk-buffer-ref.md
+    struct BufferPointer<T, let Alignment : int = 0>
+    {
+        T *_ptr;
+        [ForceInline] __init(T *ptr) { _ptr = ptr; }
+        [ForceInline] __init(uint64_t val) { _ptr = (T *)val; }
+        [ForceInline] Ref<T> Get() { return *_ptr; }
+        [ForceInline] T *getPtr() { return _ptr;}
+    }
+    [ForceInline]
+    BufferPointer<U, alignment> static_pointer_cast<U, let alignment : int = 0, T, let a : int>(BufferPointer<T, a> src)
+    {
+        return BufferPointer<U, alignment>((U*)(src.getPtr()));
+    }
+    [ForceInline]
+    BufferPointer<U, alignment> reinterpret_pointer_cast<U, let alignment : int = 0, T, let a : int>(BufferPointer<T, a> src)
+    {
+        return BufferPointer<U, alignment>((U *)(src.getPtr()));
+    }
+}
+
+attribute_syntax[vk_aliased_pointer] : VkAliasedPointerAttribute;
+attribute_syntax[vk_restrict_pointer] : VkRestrictPointerAttribute;
+
+extension uint64_t
+{
+    __init<T, let alignment : int>(vk::BufferPointer<T, alignment> ptr)
+    {
+        this = (uint64_t)ptr._ptr;
+    }
+}
+
 __generic<T, let Alignment : int = 16>
 __intrinsic_type($(kIROp_HLSLConstBufferPointerType))
 __glsl_extension(GL_EXT_buffer_reference)
-- 
cgit v1.2.3