From e743ddd49045284b706cc2cbbb615acc6fe3d882 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Wed, 9 Nov 2022 09:15:15 -0500
Subject: f32tof16 and f16tof32 support for CPU targets (#2500)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Float16 support for C++/CPU based targets with f16tof32 and f32tof16.

* Small correction around INF/NAN handling for f32tof16

* Small improvement to f16tof32

* Disable CUDA test for now.
---
 tests/hlsl-intrinsic/f16tof32.slang              | 18 ++++++++++++
 tests/hlsl-intrinsic/f16tof32.slang.expected.txt |  8 +++++
 tests/hlsl-intrinsic/f32tof16.slang              | 37 ++++++++++++++++++++++++
 tests/hlsl-intrinsic/f32tof16.slang.expected.txt |  8 +++++
 4 files changed, 71 insertions(+)
 create mode 100644 tests/hlsl-intrinsic/f16tof32.slang
 create mode 100644 tests/hlsl-intrinsic/f16tof32.slang.expected.txt
 create mode 100644 tests/hlsl-intrinsic/f32tof16.slang
 create mode 100644 tests/hlsl-intrinsic/f32tof16.slang.expected.txt

(limited to 'tests')

diff --git a/tests/hlsl-intrinsic/f16tof32.slang b/tests/hlsl-intrinsic/f16tof32.slang
new file mode 100644
index 000000000..b73ade4cf
--- /dev/null
+++ b/tests/hlsl-intrinsic/f16tof32.slang
@@ -0,0 +1,18 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute 
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0  0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<float> outputBuffer;
+
+[numthreads(8, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int idx = int(dispatchThreadID.x);
+
+    uint values[] = { 0, 0xC600, 0x4A00, 0xCE00, 0x2555, 0xA155, 0x1D55, 0x9955 };
+    
+    outputBuffer[idx] = f16tof32(values[idx]);
+}
\ No newline at end of file
diff --git a/tests/hlsl-intrinsic/f16tof32.slang.expected.txt b/tests/hlsl-intrinsic/f16tof32.slang.expected.txt
new file mode 100644
index 000000000..833998d8e
--- /dev/null
+++ b/tests/hlsl-intrinsic/f16tof32.slang.expected.txt
@@ -0,0 +1,8 @@
+0
+C0C00000
+41400000
+C1C00000
+3CAAA000
+BC2AA000
+3BAAA000
+BB2AA000
diff --git a/tests/hlsl-intrinsic/f32tof16.slang b/tests/hlsl-intrinsic/f32tof16.slang
new file mode 100644
index 000000000..465b2840a
--- /dev/null
+++ b/tests/hlsl-intrinsic/f32tof16.slang
@@ -0,0 +1,37 @@
+//TEST(compute):COMPARE_COMPUTE_EX:-cpu -compute 
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute
+//TEST(compute):COMPARE_COMPUTE_EX:-slang -compute -dx12
+//TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -compute
+//DISABLE_TEST(compute):COMPARE_COMPUTE_EX:-cuda -compute
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0 0 0 0 0], stride=4):out,name outputBuffer
+RWStructuredBuffer<uint> outputBuffer;
+
+[numthreads(8, 1, 1)]
+void computeMain(uint3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int idx = int(dispatchThreadID.x);
+
+    // We want to test 0
+    float value = 0.0f;
+    // Produces some somewhat interesting numbers
+    if (idx != 0)
+    {
+        value = (3 << idx);
+        
+        if ((idx & 1) != 0)
+        {
+            value = -value;
+        }
+        
+        // Do the recip
+        if ((idx & 4) != 0)
+        {
+            value = 1.0f / value;
+        }
+    }
+
+    uint r = f32tof16(value);
+    
+    outputBuffer[idx] = r;
+}
\ No newline at end of file
diff --git a/tests/hlsl-intrinsic/f32tof16.slang.expected.txt b/tests/hlsl-intrinsic/f32tof16.slang.expected.txt
new file mode 100644
index 000000000..2a2175a43
--- /dev/null
+++ b/tests/hlsl-intrinsic/f32tof16.slang.expected.txt
@@ -0,0 +1,8 @@
+0
+C600
+4A00
+CE00
+2555
+A155
+1D55
+9955
-- 
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