From b282c88d9743fc9bb60ef27cfa5d9cf58cccd60b Mon Sep 17 00:00:00 2001
From: Copilot <198982749+Copilot@users.noreply.github.com>
Date: Thu, 3 Jul 2025 23:53:02 -0700
Subject: Make copysign function differentiable (#7585)

* Initial plan

* Implement copysign forward and backward derivatives

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

* Fix copysign test format to use expected.txt file

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

* Add wgsl support to copysign and fix y==0 derivative case

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

* Add wgsl support to copysign helper functions

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

* Fix copysign derivative to return 0 when either x or y is 0

Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
---
 .../dstdlib-copysign.slang.expected.txt             | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/autodiff-dstdlib/dstdlib-copysign.slang.expected.txt

(limited to 'tests/autodiff-dstdlib/dstdlib-copysign.slang.expected.txt')

diff --git a/tests/autodiff-dstdlib/dstdlib-copysign.slang.expected.txt b/tests/autodiff-dstdlib/dstdlib-copysign.slang.expected.txt
new file mode 100644
index 000000000..71f3de9fd
--- /dev/null
+++ b/tests/autodiff-dstdlib/dstdlib-copysign.slang.expected.txt
@@ -0,0 +1,21 @@
+type: float
+-3.000000
+-2.000000
+2.000000
+-1.500000
+0.000000
+0.000000
+-5.000000
+-1.000000
+3.000000
+-2.000000
+-1.000000
+0.000000
+-2.000000
+0.000000
+3.000000
+0.000000
+0.000000
+0.000000
+-1.000000
+-3.000000
\ No newline at end of file
-- 
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