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212 lines
6.8 KiB
212 lines
6.8 KiB
/* Machine-dependent software floating-point definitions. |
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Sparc userland (_Q_*) version. |
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Copyright (C) 1997,1998,1999 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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Contributed by Richard Henderson ([email protected]), |
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Jakub Jelinek ([email protected]), |
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David S. Miller ([email protected]) and |
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Peter Maydell ([email protected]). |
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The GNU C Library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Library General Public License as |
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published by the Free Software Foundation; either version 2 of the |
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License, or (at your option) any later version. |
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The GNU C Library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Library General Public License for more details. |
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You should have received a copy of the GNU Library General Public |
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License along with the GNU C Library; see the file COPYING.LIB. If |
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not, write to the Free Software Foundation, Inc., |
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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#ifndef _SFP_MACHINE_H |
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#define _SFP_MACHINE_H |
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#define _FP_W_TYPE_SIZE 32 |
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#define _FP_W_TYPE unsigned long |
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#define _FP_WS_TYPE signed long |
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#define _FP_I_TYPE long |
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#define _FP_MUL_MEAT_S(R,X,Y) \ |
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_FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm) |
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#define _FP_MUL_MEAT_D(R,X,Y) \ |
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_FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) |
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#define _FP_MUL_MEAT_Q(R,X,Y) \ |
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_FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm) |
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#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv(S,R,X,Y) |
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y) |
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y) |
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#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) |
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#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1), -1 |
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#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1 |
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#define _FP_NANSIGN_S 0 |
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#define _FP_NANSIGN_D 0 |
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#define _FP_NANSIGN_Q 0 |
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#define _FP_KEEPNANFRACP 1 |
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/* If one NaN is signaling and the other is not, |
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* we choose that one, otherwise we choose X. |
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*/ |
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/* For _Qp_* and _Q_*, this should prefer X, for |
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* CPU instruction emulation this should prefer Y. |
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* (see SPAMv9 B.2.2 section). |
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*/ |
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#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ |
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do { \ |
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if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ |
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&& !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ |
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{ \ |
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R##_s = X##_s; \ |
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_FP_FRAC_COPY_##wc(R,X); \ |
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} \ |
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else \ |
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{ \ |
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R##_s = Y##_s; \ |
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_FP_FRAC_COPY_##wc(R,Y); \ |
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} \ |
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R##_c = FP_CLS_NAN; \ |
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} while (0) |
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/* Some assembly to speed things up. */ |
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#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ |
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__asm__ ("addcc %r7,%8,%2\n\t" \ |
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"addxcc %r5,%6,%1\n\t" \ |
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"addx %r3,%4,%0\n" \ |
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: "=r" (r2), \ |
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"=&r" (r1), \ |
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"=&r" (r0) \ |
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: "%rJ" ((USItype)(x2)), \ |
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"rI" ((USItype)(y2)), \ |
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"%rJ" ((USItype)(x1)), \ |
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"rI" ((USItype)(y1)), \ |
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"%rJ" ((USItype)(x0)), \ |
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"rI" ((USItype)(y0)) \ |
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: "cc") |
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#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) \ |
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__asm__ ("subcc %r7,%8,%2\n\t" \ |
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"subxcc %r5,%6,%1\n\t" \ |
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"subx %r3,%4,%0\n" \ |
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: "=r" (r2), \ |
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"=&r" (r1), \ |
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"=&r" (r0) \ |
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: "%rJ" ((USItype)(x2)), \ |
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"rI" ((USItype)(y2)), \ |
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"%rJ" ((USItype)(x1)), \ |
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"rI" ((USItype)(y1)), \ |
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"%rJ" ((USItype)(x0)), \ |
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"rI" ((USItype)(y0)) \ |
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: "cc") |
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#define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ |
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do { \ |
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/* We need to fool gcc, as we need to pass more than 10 \ |
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input/outputs. */ \ |
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register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ |
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__asm__ __volatile__ ( \ |
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"addcc %r8,%9,%1\n\t" \ |
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"addxcc %r6,%7,%0\n\t" \ |
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"addxcc %r4,%5,%%g2\n\t" \ |
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"addx %r2,%3,%%g1\n\t" \ |
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: "=&r" (r1), \ |
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"=&r" (r0) \ |
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: "%rJ" ((USItype)(x3)), \ |
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"rI" ((USItype)(y3)), \ |
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"%rJ" ((USItype)(x2)), \ |
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"rI" ((USItype)(y2)), \ |
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"%rJ" ((USItype)(x1)), \ |
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"rI" ((USItype)(y1)), \ |
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"%rJ" ((USItype)(x0)), \ |
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"rI" ((USItype)(y0)) \ |
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: "cc", "g1", "g2"); \ |
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__asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ |
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r3 = _t1; r2 = _t2; \ |
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} while (0) |
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#define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ |
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do { \ |
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/* We need to fool gcc, as we need to pass more than 10 \ |
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input/outputs. */ \ |
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register USItype _t1 __asm__ ("g1"), _t2 __asm__ ("g2"); \ |
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__asm__ __volatile__ ( \ |
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"subcc %r8,%9,%1\n\t" \ |
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"subxcc %r6,%7,%0\n\t" \ |
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"subxcc %r4,%5,%%g2\n\t" \ |
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"subx %r2,%3,%%g1\n\t" \ |
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: "=&r" (r1), \ |
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"=&r" (r0) \ |
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: "%rJ" ((USItype)(x3)), \ |
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"rI" ((USItype)(y3)), \ |
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"%rJ" ((USItype)(x2)), \ |
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"rI" ((USItype)(y2)), \ |
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"%rJ" ((USItype)(x1)), \ |
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"rI" ((USItype)(y1)), \ |
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"%rJ" ((USItype)(x0)), \ |
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"rI" ((USItype)(y0)) \ |
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: "cc", "g1", "g2"); \ |
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__asm__ __volatile__ ("" : "=r" (_t1), "=r" (_t2)); \ |
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r3 = _t1; r2 = _t2; \ |
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} while (0) |
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#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0) |
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#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) |
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#define __FP_FRAC_ADDI_4(x3,x2,x1,x0,i) \ |
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__asm__ ("addcc %3,%4,%3\n\t" \ |
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"addxcc %2,%%g0,%2\n\t" \ |
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"addxcc %1,%%g0,%1\n\t" \ |
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"addx %0,%%g0,%0\n\t" \ |
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: "=&r" (x3), \ |
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"=&r" (x2), \ |
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"=&r" (x1), \ |
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"=&r" (x0) \ |
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: "rI" ((USItype)(i)), \ |
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"0" ((USItype)(x3)), \ |
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"1" ((USItype)(x2)), \ |
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"2" ((USItype)(x1)), \ |
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"3" ((USItype)(x0)) \ |
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: "cc") |
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#ifndef CONFIG_SMP |
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extern struct task_struct *last_task_used_math; |
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#endif |
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/* Obtain the current rounding mode. */ |
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#ifndef FP_ROUNDMODE |
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#ifdef CONFIG_SMP |
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#define FP_ROUNDMODE ((current->thread.fsr >> 30) & 0x3) |
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#else |
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#define FP_ROUNDMODE ((last_task_used_math->thread.fsr >> 30) & 0x3) |
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#endif |
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#endif |
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/* Exception flags. */ |
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#define FP_EX_INVALID (1 << 4) |
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#define FP_EX_OVERFLOW (1 << 3) |
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#define FP_EX_UNDERFLOW (1 << 2) |
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#define FP_EX_DIVZERO (1 << 1) |
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#define FP_EX_INEXACT (1 << 0) |
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#define FP_HANDLE_EXCEPTIONS return _fex |
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#ifdef CONFIG_SMP |
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#define FP_INHIBIT_RESULTS ((current->thread.fsr >> 23) & _fex) |
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#else |
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#define FP_INHIBIT_RESULTS ((last_task_used_math->thread.fsr >> 23) & _fex) |
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#endif |
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#ifdef CONFIG_SMP |
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#define FP_TRAPPING_EXCEPTIONS ((current->thread.fsr >> 23) & 0x1f) |
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#else |
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#define FP_TRAPPING_EXCEPTIONS ((last_task_used_math->thread.fsr >> 23) & 0x1f) |
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#endif |
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#endif
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