From 5377f9247172be409c3e92356eb6b435ad70c607 Mon Sep 17 00:00:00 2001
From: maya <maya@NetBSD.org>
Date: Sun, 14 Apr 2019 19:25:27 +0000
Subject: [PATCH] Provide a definition of quiet NaN for RISC-V, and a reference
 to where it comes from.

---
 lib/libc/arch/riscv/gdtoa/gd_qnan.h | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/lib/libc/arch/riscv/gdtoa/gd_qnan.h b/lib/libc/arch/riscv/gdtoa/gd_qnan.h
index 8ced8a42d2ec..fb645c64102c 100644
--- a/lib/libc/arch/riscv/gdtoa/gd_qnan.h
+++ b/lib/libc/arch/riscv/gdtoa/gd_qnan.h
@@ -1,5 +1,19 @@
-/* $NetBSD: gd_qnan.h,v 1.1 2014/09/19 17:36:25 matt Exp $ */
+/* $NetBSD: gd_qnan.h,v 1.2 2019/04/14 19:25:27 maya Exp $ */
 
-#define f_QNAN 0x7fe00000
+/* 
+ * The RISC-V Instruction Set Manual Volume I: User-Level ISA
+ * Document Version 2.2
+ *
+ * 8.3 NaN Generation and Propagation
+ *
+ * The canonical NaN has a positive sign and all significand bits clear except
+ * the MSB, aka the quiet bit.
+ */
+
+#define f_QNAN 0x7fc00000
 #define d_QNAN0 0x0
-#define d_QNAN1 0x7ffc0000
+#define d_QNAN1 0x7ff80000
+#define ld_QNAN0 0x0
+#define ld_QNAN1 0x0
+#define ld_QNAN2 0x0
+#define ld_QNAN3 0x7fff8000