181 lines
5.7 KiB
C
181 lines
5.7 KiB
C
/* softfp machine description for MIPS.
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Copyright (C) 2009-2016 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifdef __mips64
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#define _FP_W_TYPE_SIZE 64
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#define _FP_W_TYPE unsigned long long
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#define _FP_WS_TYPE signed long long
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#define _FP_I_TYPE long long
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typedef int TItype __attribute__ ((mode (TI)));
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typedef unsigned int UTItype __attribute__ ((mode (TI)));
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#define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype))
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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_1_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_2_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_norm(S,R,X,Y)
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#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
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#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
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#ifdef __mips_nan2008
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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)
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# define _FP_NANFRAC_Q ((_FP_QNANBIT_Q << 1) - 1), -1
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#else
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# define _FP_NANFRAC_S (_FP_QNANBIT_S - 1)
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# define _FP_NANFRAC_D (_FP_QNANBIT_D - 1)
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# define _FP_NANFRAC_Q (_FP_QNANBIT_Q - 1), -1
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#endif
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#else
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#define _FP_W_TYPE_SIZE 32
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#define _FP_W_TYPE unsigned int
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#define _FP_WS_TYPE signed int
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#define _FP_I_TYPE int
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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_norm(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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#ifdef __mips_nan2008
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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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#else
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# define _FP_NANFRAC_S (_FP_QNANBIT_S - 1)
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# define _FP_NANFRAC_D (_FP_QNANBIT_D - 1), -1
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# define _FP_NANFRAC_Q (_FP_QNANBIT_Q - 1), -1, -1, -1
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#endif
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#endif
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/* The type of the result of a floating point comparison. This must
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match __libgcc_cmp_return__ in GCC for the target. */
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typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
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#define CMPtype __gcc_CMPtype
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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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#ifdef __mips_nan2008
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# define _FP_QNANNEGATEDP 0
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#else
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# define _FP_QNANNEGATEDP 1
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#endif
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/* Comment from glibc: */
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/* From my experiments it seems X is chosen unless one of the
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NaNs is sNaN, in which case the result is NANSIGN/NANFRAC. */
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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(X) | \
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_FP_FRAC_HIGH_RAW_##fs(Y)) & _FP_QNANBIT_##fs) \
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{ \
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R##_s = _FP_NANSIGN_##fs; \
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_FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs); \
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} \
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else \
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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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R##_c = FP_CLS_NAN; \
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} while (0)
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#ifdef __mips_hard_float
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#define FP_EX_INVALID 0x40
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#define FP_EX_DIVZERO 0x20
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#define FP_EX_OVERFLOW 0x10
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#define FP_EX_UNDERFLOW 0x08
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#define FP_EX_INEXACT 0x04
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#define FP_EX_ALL \
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(FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
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| FP_EX_INEXACT)
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#define FP_EX_ENABLE_SHIFT 5
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#define FP_EX_CAUSE_SHIFT 10
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#define FP_RND_NEAREST 0x0
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#define FP_RND_ZERO 0x1
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#define FP_RND_PINF 0x2
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#define FP_RND_MINF 0x3
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#define FP_RND_MASK 0x3
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#define _FP_DECL_EX \
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unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST
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#define FP_INIT_ROUNDMODE \
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do { \
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_fcsr = __builtin_mips_get_fcsr (); \
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} while (0)
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#define FP_ROUNDMODE (_fcsr & FP_RND_MASK)
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#define FP_TRAPPING_EXCEPTIONS ((_fcsr >> FP_EX_ENABLE_SHIFT) & FP_EX_ALL)
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#define FP_HANDLE_EXCEPTIONS \
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do { \
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_fcsr &= ~(FP_EX_ALL << FP_EX_CAUSE_SHIFT); \
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/* Also clear Unimplemented Operation. */ \
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_fcsr &= ~(1 << 17); \
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_fcsr |= _fex | (_fex << FP_EX_CAUSE_SHIFT); \
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__builtin_mips_set_fcsr (_fcsr); \
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} while (0);
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#else
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#define FP_EX_INVALID (1 << 4)
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#define FP_EX_DIVZERO (1 << 3)
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#define FP_EX_OVERFLOW (1 << 2)
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#define FP_EX_UNDERFLOW (1 << 1)
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#define FP_EX_INEXACT (1 << 0)
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#endif
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#define _FP_TININESS_AFTER_ROUNDING 1
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#define __LITTLE_ENDIAN 1234
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#define __BIG_ENDIAN 4321
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#if defined _MIPSEB
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# define __BYTE_ORDER __BIG_ENDIAN
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#else
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# define __BYTE_ORDER __LITTLE_ENDIAN
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#endif
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/* Define ALIASNAME as a strong alias for NAME. */
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# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
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# define _strong_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((alias (#name)));
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