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Diffstat (limited to 'include/asm-sparc/sfp-machine.h')
| -rw-r--r-- | include/asm-sparc/sfp-machine.h | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/include/asm-sparc/sfp-machine.h b/include/asm-sparc/sfp-machine.h new file mode 100644 index 0000000..b4ca2d9 --- /dev/null +++ b/include/asm-sparc/sfp-machine.h @@ -0,0 +1,207 @@ +/* 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 + +#include <linux/config.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_4_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\n\t" \ + "addxcc %r5,%6,%1\n\t" \ + "addx %r3,%4,%0\n" \ + : "=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\n\t" \ + "subxcc %r5,%6,%1\n\t" \ + "subx %r3,%4,%0\n" \ + : "=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\n\t" \ + "addxcc %r6,%7,%0\n\t" \ + "addxcc %r4,%5,%%g2\n\t" \ + "addx %r2,%3,%%g1\n\t" \ + : "=&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\n\t" \ + "subxcc %r6,%7,%0\n\t" \ + "subxcc %r4,%5,%%g2\n\t" \ + "subx %r2,%3,%%g1\n\t" \ + : "=&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\n\t" \ + "addxcc %2,%%g0,%2\n\t" \ + "addxcc %1,%%g0,%1\n\t" \ + "addx %0,%%g0,%0\n\t" \ + : "=&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 CONFIG_SMP +extern struct task_struct *last_task_used_math; +#endif + +/* Obtain the current rounding mode. */ +#ifndef FP_ROUNDMODE +#ifdef CONFIG_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 CONFIG_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 |
