1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/jit/ReciprocalMulConstants.h b/js/src/jit/ReciprocalMulConstants.h
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+++ b/js/src/jit/ReciprocalMulConstants.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_ReciprocalMulConstants_h
+#define jit_ReciprocalMulConstants_h
+
+#include <stdint.h>
+
+namespace js::jit {
+
+struct ReciprocalMulConstants {
+  int64_t multiplier;
+  int32_t shiftAmount;
+
+  static ReciprocalMulConstants computeSignedDivisionConstants(uint32_t d) {
+    return computeDivisionConstants(d, 31);
+  }
+
+  static ReciprocalMulConstants computeUnsignedDivisionConstants(uint32_t d) {
+    return computeDivisionConstants(d, 32);
+  }
+
+ private:
+  static ReciprocalMulConstants computeDivisionConstants(uint32_t d,
+                                                         int maxLog);
+};
+
+}  // namespace js::jit
+
+#endif /* jit_ReciprocalMulConstants_h */