From 4af61e2296a49876c2d9e7cf192ae825302a83de Mon Sep 17 00:00:00 2001
From: Sai Praveen Bangaru <31557731+saipraveenb25@users.noreply.github.com>
Date: Wed, 13 Jul 2022 15:55:30 -0400
Subject: Added support for differentiating out and inout parameters. (#2323)

* Added out/inout tests

* Added support for out and inout parameters. Still untested

* Fixed and tested support for out and inout types

* Removed some comments
---
 tests/autodiff/inout-parameters-jvp.slang          | 30 ++++++++++++++++++++++
 .../inout-parameters-jvp.slang.expected.txt        |  5 ++++
 tests/autodiff/out-parameters-jvp.slang            | 28 ++++++++++++++++++++
 .../autodiff/out-parameters-jvp.slang.expected.txt |  5 ++++
 4 files changed, 68 insertions(+)
 create mode 100644 tests/autodiff/inout-parameters-jvp.slang
 create mode 100644 tests/autodiff/inout-parameters-jvp.slang.expected.txt
 create mode 100644 tests/autodiff/out-parameters-jvp.slang
 create mode 100644 tests/autodiff/out-parameters-jvp.slang.expected.txt

(limited to 'tests')

diff --git a/tests/autodiff/inout-parameters-jvp.slang b/tests/autodiff/inout-parameters-jvp.slang
new file mode 100644
index 000000000..989e56c02
--- /dev/null
+++ b/tests/autodiff/inout-parameters-jvp.slang
@@ -0,0 +1,30 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+__differentiate_jvp void h(float x, float y, inout float z)
+{
+    float m = x + y;
+    float n = x - y;
+    z = z + m * n + 2 * x * y;
+}
+
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    float x = 2.0;
+    float y = 3.5;
+    float z = 1.0;
+    float dx = 1.0;
+    float dy = 0.5;
+    float dz = 2.5;
+
+    __jvp(h)(x, y, z, dx, dy, dz);
+
+    outputBuffer[0] = dz; // Expect: 12.0
+    outputBuffer[1] = z;  // Expect: 1.0
+
+}
\ No newline at end of file
diff --git a/tests/autodiff/inout-parameters-jvp.slang.expected.txt b/tests/autodiff/inout-parameters-jvp.slang.expected.txt
new file mode 100644
index 000000000..d8a590c0e
--- /dev/null
+++ b/tests/autodiff/inout-parameters-jvp.slang.expected.txt
@@ -0,0 +1,5 @@
+type: float
+12.0
+1.0
+0.0
+0.0
\ No newline at end of file
diff --git a/tests/autodiff/out-parameters-jvp.slang b/tests/autodiff/out-parameters-jvp.slang
new file mode 100644
index 000000000..58c6cfeb0
--- /dev/null
+++ b/tests/autodiff/out-parameters-jvp.slang
@@ -0,0 +1,28 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -shaderobj -output-using-type
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute -shaderobj -output-using-type
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+__differentiate_jvp void h(float x, float y, out float result)
+{
+    float m = x + y;
+    float n = x - y;
+    result = m * n + 2 * x * y;
+}
+
+
+[numthreads(1, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    float x = 2.0;
+    float y = 3.5;
+    float dx = 1.0;
+    float dy = 0.5;
+
+    float dresult = 0.0f;
+    __jvp(h)(x, y, dx, dy, dresult);
+
+    outputBuffer[0] = dresult; // Expect: 9.5
+
+}
\ No newline at end of file
diff --git a/tests/autodiff/out-parameters-jvp.slang.expected.txt b/tests/autodiff/out-parameters-jvp.slang.expected.txt
new file mode 100644
index 000000000..555935fc4
--- /dev/null
+++ b/tests/autodiff/out-parameters-jvp.slang.expected.txt
@@ -0,0 +1,5 @@
+type: float
+9.5
+0.0
+0.0
+0.0
\ No newline at end of file
-- 
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