| /* 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_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 |
