Module Name: src
Committed By: matt
Date: Wed Jan 29 01:34:44 UTC 2014
Modified Files:
src/sys/arch/arm/include: ieee.h
Log Message:
If __ARM_PCS_AAPCS64 is defined, define struct ieee_ext and union ieee_ext_u.
Use uint64_t so we can just have ext_frach and ext_fracl.
To generate a diff of this commit:
cvs rdiff -u -r1.9 -r1.10 src/sys/arch/arm/include/ieee.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/include/ieee.h
diff -u src/sys/arch/arm/include/ieee.h:1.9 src/sys/arch/arm/include/ieee.h:1.10
--- src/sys/arch/arm/include/ieee.h:1.9 Sun Dec 11 12:16:47 2005
+++ src/sys/arch/arm/include/ieee.h Wed Jan 29 01:34:44 2014
@@ -1,13 +1,120 @@
-/* $NetBSD: ieee.h,v 1.9 2005/12/11 12:16:47 christos Exp $ */
+/* $NetBSD: ieee.h,v 1.10 2014/01/29 01:34:44 matt Exp $ */
+
+/*-
+ * Copyright (c) 2014 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Matt Thomas of 3am Software Foundry.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * ieee.h defines the machine-dependent layout of the machine's IEEE
+ * floating point. It does *not* define (yet?) any of the rounding
+ * mode bits, exceptions, and so forth.
+ */
+
+#ifndef _ARM_IEEE_H_
+#define _ARM_IEEE_H_
#include <sys/ieee754.h>
+#if 0
+#define SNG_QUIETNAN (1 << 22)
+#define DBL_QUIETNAN (1 << 19)
+#endif
+
+#ifdef __ARM_PCS_AAPCS64
+
/*
+ * The AArch64 architecture defines the following IEEE 754 compliant
+ * 128-bit extended-precision format.
+ */
+
+#define EXT_EXPBITS 15
+#define EXT_FRACHBITS 48
+#define EXT_FRACLBITS 64
+#define EXT_FRACBITS (EXT_FRACLBITS + EXT_FRACHBITS)
+
+#define EXT_TO_ARRAY32(u, a) do { \
+ (a)[0] = (uint32_t)((u).extu_ext.ext_fracl >> 0); \
+ (a)[1] = (uint32_t)((u).extu_ext.ext_fracl >> 32); \
+ (a)[2] = (uint32_t)((u).extu_ext.ext_frach >> 0); \
+ (a)[3] = (uint32_t)((u).extu_ext.ext_frach >> 32); \
+} while(/*CONSTCOND*/0)
+
+struct ieee_ext {
+#ifdef __AARCH64EB__
+ uint64_t ext_sign:1;
+ uint64_t ext_exp:EXT_EXPBITS;
+ uint64_t ext_frach:EXT_FRACHBITS;
+ uint64_t ext_fracl;
+#else
+ uint64_t ext_fracl;
+ uint64_t ext_frach:EXT_FRACHBITS;
+ uint64_t ext_exp:EXT_EXPBITS;
+ uint64_t ext_sign:1;
+#endif
+};
+
+/*
+ * Floats whose exponent is in [1..INFNAN) (of whatever type) are
+ * `normal'. Floats whose exponent is INFNAN are either Inf or NaN.
+ * Floats whose exponent is zero are either zero (iff all fraction
+ * bits are zero) or subnormal values.
+ *
* A NaN is a `signalling NaN' if its QUIETNAN bit is clear in its
* high fraction; if the bit is set, it is a `quiet NaN'.
*/
+#define EXT_EXP_INFNAN 0x7fff
+#define EXT_EXP_INF 0x7fff
+#define EXT_EXP_NAN 0x7fff
#if 0
-#define SNG_QUIETNAN (1 << 22)
-#define DBL_QUIETNAN (1 << 19)
+#define EXT_QUIETNAN (1 << 15)
#endif
+
+/*
+ * Exponent biases.
+ */
+#define EXT_EXP_BIAS 16383
+
+/*
+ * Convenience data structures.
+ */
+union ieee_ext_u {
+ long double extu_ld;
+ struct ieee_ext extu_ext;
+};
+
+#define extu_exp extu_ext.ext_exp
+#define extu_sign extu_ext.ext_sign
+#define extu_fracl extu_ext.ext_fracl
+#define extu_frach extu_ext.ext_frach
+
+#define LDBL_IMPLICIT_NBIT 1 /* our NBIT is implicit */
+
+#endif /* __ARM_PCS_AAPCS64 */
+
+#endif /* !_ARM_IEEE_H_ */
