From eefca56afd49379bdebc97ded8b480839f930881 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Tue, 2 Jun 2020 02:13:37 -0300
Subject: [PATCH] memory: Add OpImageTexelPointer

---
 include/sirit/sirit.h       | 3 +++
 src/instructions/memory.cpp | 8 ++++++++
 2 files changed, 11 insertions(+)

diff --git a/include/sirit/sirit.h b/include/sirit/sirit.h
index 1fb8013..5d90b33 100644
--- a/include/sirit/sirit.h
+++ b/include/sirit/sirit.h
@@ -284,6 +284,9 @@ public:
     /// Allocate an object in memory, resulting in a copy to it.
     Id OpVariable(Id result_type, spv::StorageClass storage_class, Id initializer = nullptr);
 
+    /// Form a pointer to a texel of an image. Use of such a pointer is limited to atomic operations.
+    Id OpImageTexelPointer(Id result_type, Id image, Id coordinate, Id sample);
+
     /// Load through a pointer.
     Id OpLoad(Id result_type, Id pointer, std::optional<spv::MemoryAccessMask> memory_access = {});
 
diff --git a/src/instructions/memory.cpp b/src/instructions/memory.cpp
index c2cdb52..33c8b07 100644
--- a/src/instructions/memory.cpp
+++ b/src/instructions/memory.cpp
@@ -19,6 +19,14 @@ Id Module::OpVariable(Id result_type, spv::StorageClass storage_class, Id initia
     return code_store.emplace_back(std::move(op)).get();
 }
 
+Id Module::OpImageTexelPointer(Id result_type, Id image, Id coordinate, Id sample) {
+    auto op{std::make_unique<Op>(spv::Op::OpImageTexelPointer, bound++, result_type)};
+    op->Add(image);
+    op->Add(coordinate);
+    op->Add(sample);
+    return AddCode(std::move(op));
+}
+
 Id Module::OpLoad(Id result_type, Id pointer, std::optional<spv::MemoryAccessMask> memory_access) {
     auto op{std::make_unique<Op>(spv::Op::OpLoad, bound++, result_type)};
     op->Add(pointer);