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42 lines
1.2 KiB
Diff
42 lines
1.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: PJ Reiniger <pj.reiniger@gmail.com>
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Date: Tue, 3 May 2022 22:50:24 -0400
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Subject: [PATCH 15/37] Add lerp and sgn
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---
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llvm/include/llvm/Support/MathExtras.h | 21 +++++++++++++++++++++
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1 file changed, 21 insertions(+)
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diff --git a/llvm/include/llvm/Support/MathExtras.h b/llvm/include/llvm/Support/MathExtras.h
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index b9084182158757647cc9896320a353a373b0f9ec..4033e032b5979a4f25b4c16f3988fb11087ed6bb 100644
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--- a/llvm/include/llvm/Support/MathExtras.h
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+++ b/llvm/include/llvm/Support/MathExtras.h
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@@ -751,6 +751,27 @@ using stack_float_t = volatile float;
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using stack_float_t = float;
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#endif
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+// Typesafe implementation of the signum function.
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+// Returns -1 if negative, 1 if positive, 0 if 0.
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+template <typename T>
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+constexpr int sgn(T val) {
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+ return (T(0) < val) - (val < T(0));
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+}
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+
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+/**
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+ * Linearly interpolates between two values.
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+ *
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+ * @param startValue The start value.
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+ * @param endValue The end value.
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+ * @param t The fraction for interpolation.
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+ *
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+ * @return The interpolated value.
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+ */
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+template <typename T>
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+constexpr T Lerp(const T& startValue, const T& endValue, double t) {
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+ return startValue + (endValue - startValue) * t;
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+}
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+
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} // namespace llvm
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#endif
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