patch-2.3.30 linux/include/asm-alpha/sfp-machine.h

• Lines: 85
• Date: Thu Dec 2 15:28:54 1999
• Orig file: v2.3.29/linux/include/asm-alpha/sfp-machine.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/include/asm-alpha/sfp-machine.h linux/include/asm-alpha/sfp-machine.h
@@ -0,0 +1,84 @@
+/* Machine-dependent software floating-point definitions.
+   Alpha kernel version.
+   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com),
+		  Jakub Jelinek (jakub@redhat.com) and
+		  David S. Miller (davem@redhat.com).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef _SFP_MACHINE_H
+#define _SFP_MACHINE_H
+   
+#define _FP_W_TYPE_SIZE		64
+#define _FP_W_TYPE		unsigned long
+#define _FP_WS_TYPE		signed long
+#define _FP_I_TYPE		long
+
+#define _FP_MUL_MEAT_S(R,X,Y)					\
+  _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
+#define _FP_MUL_MEAT_D(R,X,Y)					\
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)					\
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
+#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_1_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_2_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S		_FP_QNANBIT_S
+#define _FP_NANFRAC_D		_FP_QNANBIT_D
+#define _FP_NANFRAC_Q		_FP_QNANBIT_Q
+#define _FP_NANSIGN_S		1
+#define _FP_NANSIGN_D		1
+#define _FP_NANSIGN_Q		1
+
+#define _FP_KEEPNANFRACP 1
+
+/* Alpha Architecture Handbook, 4.7.10.4 sais that
+ * we should prefer any type of NaN in Fb, then Fa.
+ */
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
+  do {								\
+    R##_s = Y##_s;						\
+    _FP_FRAC_COPY_##wc(R,X);					\
+    R##_c = FP_CLS_NAN;						\
+  } while (0)
+
+/* Obtain the current rounding mode. */
+#define FP_ROUNDMODE	mode
+#define FP_RND_NEAREST	(FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT)
+#define FP_RND_ZERO	(FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT)
+#define FP_RND_PINF	(FPCR_DYN_PLUS >> FPCR_DYN_SHIFT)
+#define FP_RND_MINF	(FPCR_DYN_MINUS >> FPCR_DYN_SHIFT)
+
+/* Exception flags. */
+#define FP_EX_INVALID		IEEE_TRAP_ENABLE_INV
+#define FP_EX_OVERFLOW		IEEE_TRAP_ENABLE_OVF
+#define FP_EX_UNDERFLOW		IEEE_TRAP_ENABLE_UNF
+#define FP_EX_DIVZERO		IEEE_TRAP_ENABLE_DZE
+#define FP_EX_INEXACT		IEEE_TRAP_ENABLE_INE
+#define FP_EX_DENORM		IEEE_TRAP_ENABLE_DNO
+
+#define FP_DENORM_ZERO		(fpcw & IEEE_MAP_DMZ)
+
+#define FP_HANDLE_EXCEPTIONS return _fex
+
+/* We write the results always */
+#define FP_INHIBIT_RESULTS 0
+
+#endif