From c5c1a25ab6d0e509e893d737a679ac47949df2f6 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 18 Jan 2024 16:46:00 -0800
Subject: Capability def parsing & codegen + disjoint sets (#3451)

* Capability def parsing & codegen + disjoint sets

This change adds a capability definition file, and a code generator
to produce C++ code that defines the capability enums and necessary
data structures around the capabilities.

Extends the existing CapabilitySet class to support expressing
disjoint sets of capabilities. This sets up for the next change
that will enhance our type checking with reasoning of capability
requirements.

* Fix cmake.

* Fix warning.

* Fix.

* Fix isBetterForTarget to prefer less specialized option.

* Fix.

* Fix premake.

* Fix intrinsic.

* Fix vs sln file.

---------

Co-authored-by: Yong He <yhe@nvidia.com>
---
 premake5.lua | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

(limited to 'premake5.lua')

diff --git a/premake5.lua b/premake5.lua
index 13c6279c6..51ddbd62c 100644
--- a/premake5.lua
+++ b/premake5.lua
@@ -999,6 +999,12 @@ tool "slang-lookup-generator"
 
     links { "compiler-core", "core" }
 
+tool "slang-capability-generator"
+    uuid "FD16CA29-C66A-430A-822C-C09655088611"
+    includedirs { "." }
+
+    links { "compiler-core", "core" }
+
 tool "test-process"
     uuid "BE412850-4BB9-429A-877C-BFBC4B34186C"
     includedirs { "." }
@@ -1400,6 +1406,26 @@ function preludeGenerator()
     buildinputs { builddir .. "/slang-embed" .. getExecutableSuffix() }
 end
 
+function capabilityGenerator()
+    filter("files:source/slang/*.capdef")
+
+    dependson { "slang-capability-generator" }
+    local inputFile = "%{file.abspath}"
+    local builddir = getBuildDir()
+    local outputHeaderFile = "%{wks.location}/source/slang/slang-generated-capability-defs.h"
+    local outputCppFile = "%{wks.location}/source/slang/slang-generated-capability-defs-impl.h"
+    local outputLookupFile = "%{wks.location}/source/slang/slang-lookup-capability-defs.cpp"
+    if executeBinary then
+        buildmessage ("slang-capability-generator %{file.relpath}")
+        local buildcmd = '"' .. builddir .. '/slang-capability-generator" "%{file.abspath}"'
+        buildcommands { buildcmd }
+        buildinputs { "%{file.abspath}", builddir .. "/slang-capability-generator" .. getExecutableSuffix() }
+        buildoutputs (outputHeaderFile, outputCppFile, outputLookupFile)
+    end
+
+    filter { }
+end
+
 if not skipSourceGeneration then
 
 generatorProject("run-generators", nil)
@@ -1415,6 +1441,7 @@ generatorProject("run-generators", nil)
         "source/slang/*.meta.slang",                -- The stdlib files
         "source/slang/slang-ast-reflect.h",         -- C++ reflection
         "prelude/*.h",                              -- The prelude files
+        "source/slang/*.capdef",
 
         --
         -- To build we need to have some source! It has to be a source file that
@@ -1428,7 +1455,7 @@ generatorProject("run-generators", nil)
     -- First, we need to ensure that various source-generation tools
     -- get built before `slang`, so we declare a non-linking dependency between
     -- the projects here:
-    dependson { "slang-cpp-extractor", "slang-generate", "slang-embed" }
+    dependson { "slang-cpp-extractor", "slang-generate", "slang-embed", "slang-capability-generator" }
 
     local executableSuffix = getExecutableSuffix()
 
@@ -1446,6 +1473,7 @@ generatorProject("run-generators", nil)
     if executeBinary then
         metaSlangGenerator()
         preludeGenerator()
+        capabilityGenerator()
     end
 
     filter { }
@@ -1564,7 +1592,8 @@ if enableEmbedStdLib then
             "prelude/slang-hlsl-prelude.h.cpp",
             "prelude/slang-cpp-prelude.h.cpp",
             "prelude/slang-cpp-host-prelude.h.cpp",
-            "prelude/slang-torch-prelude.h.cpp"
+            "prelude/slang-torch-prelude.h.cpp",
+            "source/slang/slang-lookup-capability-defs.cpp"
         }
         if not targetInfo.isWindows then
             links { "pthread" }
@@ -1684,6 +1713,9 @@ standardProject("slang", "source/slang")
     -- Similarly for any generated lookup tables
     files {
         "source/slang/slang-lookup-glslstd450.cpp",
+        "source/slang/slang-lookup-capability-defs.cpp",
+        "source/slang/slang-generated-capability-defs.h",
+        "source/slang/slang-generated-capability-defs-impl.h",
     }
 
     --
@@ -1695,6 +1727,7 @@ standardProject("slang", "source/slang")
     if not skipSourceGeneration then
         dependson { "run-generators" }
         dependson { "generate-lookup-tables" }
+        dependson { "generate-capabilities" }
         dependson { "generate-spirv-embed" }
     end
 
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