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Provide a definition of quiet NaN for RISC-V, and a reference to where 

it comes from.
This commit is contained in:
maya 2019-04-14 19:25:27 +00:00
parent fb007af046
commit 5377f92471
1 changed files with 17 additions and 3 deletions
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20
lib/libc/arch/riscv/gdtoa/gd_qnan.h
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@ -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