diff options
Diffstat (limited to 'sysdeps/alpha/soft-fp/sfp-machine.h')
| -rw-r--r-- | sysdeps/alpha/soft-fp/sfp-machine.h | 97 |
1 files changed, 78 insertions, 19 deletions
diff --git a/sysdeps/alpha/soft-fp/sfp-machine.h b/sysdeps/alpha/soft-fp/sfp-machine.h index 73b934ddce..2bad4e9dc6 100644 --- a/sysdeps/alpha/soft-fp/sfp-machine.h +++ b/sysdeps/alpha/soft-fp/sfp-machine.h @@ -1,35 +1,94 @@ +/* Machine-dependent software floating-point definitions. + Alpha userland IEEE 128-bit version. + Copyright (C) 2004 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) 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <fenv_libc.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 _alpha_mul_64_128(rhi, rlo, x, y) \ - __asm__("umulh %2,%3,%0; mulq %2,%3,%1" \ - : "=&r"(rhi), "=r"(rlo) : "r"(x), "r"(y)) - #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,_alpha_mul_64_128) + _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,_alpha_mul_64_128) + _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_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(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, 0 -/* FIXME: This is just a wild guess */ -#define _FP_NANSIGN_S 1 -#define _FP_NANSIGN_D 1 -#define _FP_NANSIGN_Q 1 +#define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) +#define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) +#define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 +#define _FP_NANSIGN_S 0 +#define _FP_NANSIGN_D 0 +#define _FP_NANSIGN_Q 0 #define _FP_KEEPNANFRACP 1 -#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ - do { \ - R##_s = Y##_s; \ - _FP_FRAC_COPY_##wc(R,Y); \ - R##_c = FP_CLS_NAN; \ + +/* Alpha Architecture Handbook, 4.7.10.4 sez 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) + +/* Rounding mode settings. */ +#define FP_RND_NEAREST FE_TONEAREST +#define FP_RND_ZERO FE_TOWARDZERO +#define FP_RND_PINF FE_UPWARD +#define FP_RND_MINF FE_DOWNWARD + +/* Obtain the current rounding mode. It's given as an argument to + all the Ots functions, with 4 meaning "dynamic". */ +#define FP_ROUNDMODE _round + +/* Exception flags. */ +#define FP_EX_INVALID FE_INVALID +#define FP_EX_OVERFLOW FE_OVERFLOW +#define FP_EX_UNDERFLOW FE_UNDERFLOW +#define FP_EX_DIVZERO FE_DIVBYZERO +#define FP_EX_INEXACT FE_INEXACT + +#define FP_INIT_ROUNDMODE \ +do { \ + if (__builtin_expect (_round == 4, 0)) \ + { \ + unsigned long t; \ + __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(t)); \ + _round = (t >> FPCR_ROUND_SHIFT) & 3; \ + } \ +} while (0) + +#define FP_HANDLE_EXCEPTIONS \ +do { \ + if (__builtin_expect (_fex, 0)) \ + { \ + unsigned long t = __ieee_get_fp_control (); \ + __ieee_set_fp_control (t | _fex); \ + } \ +} while (0) |