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

• Lines: 206
• Date: Thu Dec 2 15:28:54 1999
• Orig file: v2.3.29/linux/include/asm-sparc/sfp-machine.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/include/asm-sparc/sfp-machine.h linux/include/asm-sparc/sfp-machine.h
@@ -0,0 +1,205 @@
+/* Machine-dependent software floating-point definitions.
+   Sparc userland (_Q_*) 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 (jj@ultra.linux.cz),
+		  David S. Miller (davem@redhat.com) and
+		  Peter Maydell (pmaydell@chiark.greenend.org.uk).
+
+   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		32
+#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_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y)					\
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)					\
+  _FP_MUL_MEAT_5_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_udiv(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
+#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
+#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
+#define _FP_NANSIGN_S		0
+#define _FP_NANSIGN_D		0
+#define _FP_NANSIGN_Q		0
+
+#define _FP_KEEPNANFRACP 1
+
+/* If one NaN is signaling and the other is not,
+ * we choose that one, otherwise we choose X.
+ */
+/* For _Qp_* and _Q_*, this should prefer X, for
+ * CPU instruction emulation this should prefer Y.
+ * (see SPAMv9 B.2.2 section).
+ */
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)			\
+  do {								\
+    if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)		\
+	&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))	\
+      {								\
+	R##_s = X##_s;						\
+	_FP_FRAC_COPY_##wc(R,X);				\
+      }								\
+    else							\
+      {								\
+	R##_s = Y##_s;						\
+	_FP_FRAC_COPY_##wc(R,Y);				\
+      }								\
+    R##_c = FP_CLS_NAN;						\
+  } while (0)
+
+/* Some assembly to speed things up. */
+#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)			\
+  __asm__ ("addcc %r7,%8,%2
+	    addxcc %r5,%6,%1
+	    addx %r3,%4,%0"						\
+	   : "=r" ((USItype)(r2)),					\
+	     "=&r" ((USItype)(r1)),					\
+	     "=&r" ((USItype)(r0))					\
+	   : "%rJ" ((USItype)(x2)),					\
+	     "rI" ((USItype)(y2)),					\
+	     "%rJ" ((USItype)(x1)),					\
+	     "rI" ((USItype)(y1)),					\
+	     "%rJ" ((USItype)(x0)),					\
+	     "rI" ((USItype)(y0))					\
+	   : "cc")
+
+#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0)			\
+  __asm__ ("subcc %r7,%8,%2
+	    subxcc %r5,%6,%1
+	    subx %r3,%4,%0"						\
+	   : "=r" ((USItype)(r2)),					\
+	     "=&r" ((USItype)(r1)),					\
+	     "=&r" ((USItype)(r0))					\
+	   : "%rJ" ((USItype)(x2)),					\
+	     "rI" ((USItype)(y2)),					\
+	     "%rJ" ((USItype)(x1)),					\
+	     "rI" ((USItype)(y1)),					\
+	     "%rJ" ((USItype)(x0)),					\
+	     "rI" ((USItype)(y0))					\
+	   : "cc")
+
+#define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)		\
+  do {									\
+    /* We need to fool gcc,  as we need to pass more than 10		\
+       input/outputs.  */						\
+    register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2");		\
+    __asm__ __volatile__ ("
+	    addcc %r8,%9,%1
+	    addxcc %r6,%7,%0
+	    addxcc %r4,%5,%%g2
+	    addx %r2,%3,%%g1"						\
+	   : "=&r" ((USItype)(r1)),					\
+	     "=&r" ((USItype)(r0))					\
+	   : "%rJ" ((USItype)(x3)),					\
+	     "rI" ((USItype)(y3)),					\
+	     "%rJ" ((USItype)(x2)),					\
+	     "rI" ((USItype)(y2)),					\
+	     "%rJ" ((USItype)(x1)),					\
+	     "rI" ((USItype)(y1)),					\
+	     "%rJ" ((USItype)(x0)),					\
+	     "rI" ((USItype)(y0))					\
+	   : "cc", "g1", "g2");						\
+    __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2));			\
+    r3 = _t1; r2 = _t2;							\
+  } while (0)
+
+#define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)		\
+  do {									\
+    /* We need to fool gcc,  as we need to pass more than 10		\
+       input/outputs.  */						\
+    register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2");		\
+    __asm__ __volatile__ ("
+	    subcc %r8,%9,%1
+	    subxcc %r6,%7,%0
+	    subxcc %r4,%5,%%g2
+	    subx %r2,%3,%%g1"						\
+	   : "=&r" ((USItype)(r1)),					\
+	     "=&r" ((USItype)(r0))					\
+	   : "%rJ" ((USItype)(x3)),					\
+	     "rI" ((USItype)(y3)),					\
+	     "%rJ" ((USItype)(x2)),					\
+	     "rI" ((USItype)(y2)),					\
+	     "%rJ" ((USItype)(x1)),					\
+	     "rI" ((USItype)(y1)),					\
+	     "%rJ" ((USItype)(x0)),					\
+	     "rI" ((USItype)(y0))					\
+	   : "cc", "g1", "g2");						\
+    __asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2));			\
+    r3 = _t1; r2 = _t2;							\
+  } while (0)
+
+#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0)
+
+#define __FP_FRAC_DEC_4(x3,x2,x1,x0,y3,y2,y1,y0) __FP_FRAC_SUB_4(x3,x2,x1,x0,x3,x2,x1,x0,y3,y2,y1,y0)
+
+#define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i)					\
+  __asm__ ("addcc %3,%4,%3
+	    addxcc %2,%%g0,%2
+	    addxcc %1,%%g0,%1
+	    addx %0,%%g0,%0"						\
+	   : "=&r" ((USItype)(x3)),					\
+	     "=&r" ((USItype)(x2)),					\
+	     "=&r" ((USItype)(x1)),					\
+	     "=&r" ((USItype)(x0))					\
+	   : "rI" ((USItype)(i)),					\
+	     "0" ((USItype)(x3)),					\
+	     "1" ((USItype)(x2)),					\
+	     "2" ((USItype)(x1)),					\
+	     "3" ((USItype)(x0))					\
+	   : "cc")
+
+#ifndef __SMP__
+extern struct task_struct *last_task_used_math;
+#endif
+
+/* Obtain the current rounding mode. */
+#ifndef FP_ROUNDMODE
+#ifdef __SMP__
+#define FP_ROUNDMODE	((current->thread.fsr >> 30) & 0x3)
+#else
+#define FP_ROUNDMODE	((last_task_used_math->thread.fsr >> 30) & 0x3)
+#endif
+#endif
+
+/* Exception flags. */
+#define FP_EX_INVALID		(1 << 4)
+#define FP_EX_OVERFLOW		(1 << 3)
+#define FP_EX_UNDERFLOW		(1 << 2)
+#define FP_EX_DIVZERO		(1 << 1)
+#define FP_EX_INEXACT		(1 << 0)
+
+#define FP_HANDLE_EXCEPTIONS return _fex
+
+#ifdef __SMP__
+#define FP_INHIBIT_RESULTS ((current->thread.fsr >> 23) & _fex)
+#else
+#define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex)
+#endif
+
+#endif