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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/parisc/math-emu/fpbits.h
Initial import
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+/*
+ * Linux/PA-RISC Project (http://www.parisc-linux.org/)
+ *
+ * Floating-point emulation code
+ * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef __NO_PA_HDRS
+ PA header file -- do not include this header file for non-PA builds.
+#endif
+
+
+/*
+ * These macros are designed to be portable to all machines that have
+ * a wordsize greater than or equal to 32 bits that support the portable
+ * C compiler and the standard C preprocessor. Wordsize (default 32)
+ * and bitfield assignment (default left-to-right, unlike VAX, PDP-11)
+ * should be predefined using the constants HOSTWDSZ and BITFRL and
+ * the C compiler "-D" flag (e.g., -DHOSTWDSZ=36 -DBITFLR for the DEC-20).
+ * Note that the macro arguments assume that the integer being referenced
+ * is a 32-bit integer (right-justified on the 20) and that bit 0 is the
+ * most significant bit.
+ */
+
+#ifndef HOSTWDSZ
+#define HOSTWDSZ 32
+#endif
+
+
+/*########################### Macros ######################################*/
+
+/*-------------------------------------------------------------------------
+ * NewDeclareBitField_Reference - Declare a structure similar to the simulator
+ * function "DeclBitfR" except its use is restricted to occur within a larger
+ * enclosing structure or union definition. This declaration is an unnamed
+ * structure with the argument, name, as the member name and the argument,
+ * uname, as the element name.
+ *----------------------------------------------------------------------- */
+#define Bitfield_extract(start, length, object) \
+ ((object) >> (HOSTWDSZ - (start) - (length)) & \
+ ((unsigned)-1 >> (HOSTWDSZ - (length))))
+
+#define Bitfield_signed_extract(start, length, object) \
+ ((int)((object) << start) >> (HOSTWDSZ - (length)))
+
+#define Bitfield_mask(start, len, object) \
+ ((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
+
+#define Bitfield_deposit(value,start,len,object) object = \
+ ((object) & ~(((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len))) | \
+ (((value) & ((unsigned)-1 >> (HOSTWDSZ-len))) << (HOSTWDSZ-start-len))