1 /* Machine-dependent software floating-point definitions. 2 Sparc64 userland (_Q_* and _Qp_*) version. 3 Copyright (C) 1997-2022 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 #include <fpu_control.h> 21 #include <fenv.h> 22 #include <stdlib.h> 23 24 #define _FP_W_TYPE_SIZE 64 25 #define _FP_W_TYPE unsigned long 26 #define _FP_WS_TYPE signed long 27 #define _FP_I_TYPE long 28 29 /* Helper macros for _FP_MUL_MEAT_2_120_240_double. */ 30 #define _FP_MUL_MEAT_SET_FE_TZ \ 31 do { \ 32 static fpu_control_t _fetz = _FPU_RC_DOWN; \ 33 _FPU_SETCW(_fetz); \ 34 } while (0) 35 #ifndef _FP_MUL_MEAT_RESET_FE 36 #define _FP_MUL_MEAT_RESET_FE _FPU_SETCW(_fcw) 37 #endif 38 39 #define _FP_MUL_MEAT_S(R,X,Y) \ 40 _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y) 41 #define _FP_MUL_MEAT_D(R,X,Y) \ 42 _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm) 43 #define _FP_MUL_MEAT_Q(R,X,Y) \ 44 _FP_MUL_MEAT_2_120_240_double(_FP_WFRACBITS_Q,R,X,Y, \ 45 _FP_MUL_MEAT_SET_FE_TZ, \ 46 _FP_MUL_MEAT_RESET_FE) 47 48 #define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm) 49 #define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y) 50 #define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y) 51 52 #define _FP_NANFRAC_S ((_FP_QNANBIT_S << 1) - 1) 53 #define _FP_NANFRAC_D ((_FP_QNANBIT_D << 1) - 1) 54 #define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1 55 #define _FP_NANSIGN_S 0 56 #define _FP_NANSIGN_D 0 57 #define _FP_NANSIGN_Q 0 58 59 #define _FP_KEEPNANFRACP 1 60 #define _FP_QNANNEGATEDP 0 61 62 /* If one NaN is signaling and the other is not, 63 * we choose that one, otherwise we choose Y. 64 */ 65 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ 66 do { \ 67 if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ 68 && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ 69 { \ 70 R##_s = X##_s; \ 71 _FP_FRAC_COPY_##wc(R,X); \ 72 } \ 73 else \ 74 { \ 75 R##_s = Y##_s; \ 76 _FP_FRAC_COPY_##wc(R,Y); \ 77 } \ 78 R##_c = FP_CLS_NAN; \ 79 } while (0) 80 81 /* Obtain the current rounding mode. */ 82 #ifndef FP_ROUNDMODE 83 #define FP_ROUNDMODE ((_fcw >> 30) & 0x3) 84 #endif 85 86 /* Exception flags. */ 87 #define FP_EX_INVALID (1 << 4) 88 #define FP_EX_OVERFLOW (1 << 3) 89 #define FP_EX_UNDERFLOW (1 << 2) 90 #define FP_EX_DIVZERO (1 << 1) 91 #define FP_EX_INEXACT (1 << 0) 92 93 #define _FP_TININESS_AFTER_ROUNDING 0 94 95 #define _FP_DECL_EX \ 96 fpu_control_t _fcw __attribute__ ((unused)) = (FP_RND_NEAREST << 30) 97 98 #define FP_INIT_ROUNDMODE \ 99 do { \ 100 _FPU_GETCW(_fcw); \ 101 } while (0) 102 103 #define FP_TRAPPING_EXCEPTIONS ((_fcw >> 23) & 0x1f) 104 #define FP_INHIBIT_RESULTS ((_fcw >> 23) & _fex) 105 106 /* Simulate exceptions using double arithmetics. */ 107 extern void __Qp_handle_exceptions(int exc); 108 109 #define FP_HANDLE_EXCEPTIONS \ 110 do { \ 111 if (!_fex) \ 112 { \ 113 /* This is the common case, so we do it inline. \ 114 * We need to clear cexc bits if any. \ 115 */ \ 116 __asm__ __volatile__("fzero %%f62\n\t" \ 117 "faddd %%f62, %%f62, %%f62" \ 118 : : : "f62"); \ 119 } \ 120 else \ 121 { \ 122 __Qp_handle_exceptions (_fex); \ 123 } \ 124 } while (0) 125 126 #define QP_HANDLE_EXCEPTIONS(_a) \ 127 do { \ 128 if ((_fcw >> 23) & _fex) \ 129 { \ 130 _a; \ 131 } \ 132 else \ 133 { \ 134 _fcw = (_fcw & ~0x1fL) | (_fex << 5) | _fex; \ 135 _FPU_SETCW(_fcw); \ 136 } \ 137 } while (0) 138 139 #define QP_NO_EXCEPTIONS \ 140 __asm ("fzero %%f62\n\t" \ 141 "faddd %%f62, %%f62, %%f62" : : : "f62") 142 143 #define QP_CLOBBER "memory", "f52", "f54", "f56", "f58", "f60", "f62" 144 #define QP_CLOBBER_CC QP_CLOBBER , "cc" 145