From 90ccfdf17628e152d96638adc175ae97bd078cfc Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Tue, 22 Sep 2020 17:29:35 +0200 Subject: x86: Use one ldbl2mpn.c file for both i386 and x86_64 --- sysdeps/i386/ldbl2mpn.c | 120 ---------------------------------------------- sysdeps/ia64/ldbl2mpn.c | 2 +- sysdeps/x86/ldbl2mpn.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++ sysdeps/x86_64/ldbl2mpn.c | 1 - 4 files changed, 121 insertions(+), 122 deletions(-) delete mode 100644 sysdeps/i386/ldbl2mpn.c create mode 100644 sysdeps/x86/ldbl2mpn.c delete mode 100644 sysdeps/x86_64/ldbl2mpn.c (limited to 'sysdeps') diff --git a/sysdeps/i386/ldbl2mpn.c b/sysdeps/i386/ldbl2mpn.c deleted file mode 100644 index ec8464eef7..0000000000 --- a/sysdeps/i386/ldbl2mpn.c +++ /dev/null @@ -1,120 +0,0 @@ -/* Copyright (C) 1995-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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, see - . */ - -#include "gmp.h" -#include "gmp-impl.h" -#include "longlong.h" -#include -#include -#include - -/* Convert a `long double' in IEEE854 standard double-precision format to a - multi-precision integer representing the significand scaled up by its - number of bits (64 for long double) and an integral power of two - (MPN frexpl). */ - -mp_size_t -__mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size, - int *expt, int *is_neg, - long double value) -{ - union ieee854_long_double u; - u.d = value; - - *is_neg = u.ieee.negative; - *expt = (int) u.ieee.exponent - IEEE854_LONG_DOUBLE_BIAS; - -#if BITS_PER_MP_LIMB == 32 - res_ptr[0] = u.ieee.mantissa1; /* Low-order 32 bits of fraction. */ - res_ptr[1] = u.ieee.mantissa0; /* High-order 32 bits. */ - #define N 2 -#elif BITS_PER_MP_LIMB == 64 - /* Hopefully the compiler will combine the two bitfield extracts - and this composition into just the original quadword extract. */ - res_ptr[0] = ((mp_limb_t) u.ieee.mantissa0 << 32) | u.ieee.mantissa1; - #define N 1 -#else - #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for" -#endif - - if (u.ieee.exponent == 0) - { - /* A biased exponent of zero is a special case. - Either it is a zero or it is a denormal number. */ - if (res_ptr[0] == 0 && res_ptr[N - 1] == 0) /* Assumes N<=2. */ - /* It's zero. */ - *expt = 0; - else - { - /* It is a denormal number, meaning it has no implicit leading - one bit, and its exponent is in fact the format minimum. */ - int cnt; - - /* One problem with Intel's 80-bit format is that the explicit - leading one in the normalized representation has to be zero - for denormalized number. If it is one, the number is according - to Intel's specification an invalid number. We make the - representation unique by explicitly clearing this bit. */ - res_ptr[N - 1] &= ~((mp_limb_t) 1 << ((LDBL_MANT_DIG - 1) % BITS_PER_MP_LIMB)); - - if (res_ptr[N - 1] != 0) - { - count_leading_zeros (cnt, res_ptr[N - 1]); - if (cnt != 0) - { -#if N == 2 - res_ptr[N - 1] = res_ptr[N - 1] << cnt - | (res_ptr[0] >> (BITS_PER_MP_LIMB - cnt)); - res_ptr[0] <<= cnt; -#else - res_ptr[N - 1] <<= cnt; -#endif - } - *expt = LDBL_MIN_EXP - 1 - cnt; - } - else if (res_ptr[0] != 0) - { - count_leading_zeros (cnt, res_ptr[0]); - res_ptr[N - 1] = res_ptr[0] << cnt; - res_ptr[0] = 0; - *expt = LDBL_MIN_EXP - 1 - BITS_PER_MP_LIMB - cnt; - } - else - { - /* This is the special case of the pseudo denormal number - with only the implicit leading bit set. The value is - in fact a normal number and so we have to treat this - case differently. */ -#if N == 2 - res_ptr[N - 1] = 0x80000000ul; -#else - res_ptr[0] = 0x8000000000000000ul; -#endif - *expt = LDBL_MIN_EXP - 1; - } - } - } - else if (u.ieee.exponent < 0x7fff -#if N == 2 - && res_ptr[0] == 0 -#endif - && res_ptr[N - 1] == 0) - /* Pseudo zero. */ - *expt = 0; - - return N; -} diff --git a/sysdeps/ia64/ldbl2mpn.c b/sysdeps/ia64/ldbl2mpn.c index 641b789cd4..66ac0a47a4 100644 --- a/sysdeps/ia64/ldbl2mpn.c +++ b/sysdeps/ia64/ldbl2mpn.c @@ -1 +1 @@ -#include "../i386/ldbl2mpn.c" +#include "../x86/ldbl2mpn.c" diff --git a/sysdeps/x86/ldbl2mpn.c b/sysdeps/x86/ldbl2mpn.c new file mode 100644 index 0000000000..ec8464eef7 --- /dev/null +++ b/sysdeps/x86/ldbl2mpn.c @@ -0,0 +1,120 @@ +/* Copyright (C) 1995-2020 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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, see + . */ + +#include "gmp.h" +#include "gmp-impl.h" +#include "longlong.h" +#include +#include +#include + +/* Convert a `long double' in IEEE854 standard double-precision format to a + multi-precision integer representing the significand scaled up by its + number of bits (64 for long double) and an integral power of two + (MPN frexpl). */ + +mp_size_t +__mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size, + int *expt, int *is_neg, + long double value) +{ + union ieee854_long_double u; + u.d = value; + + *is_neg = u.ieee.negative; + *expt = (int) u.ieee.exponent - IEEE854_LONG_DOUBLE_BIAS; + +#if BITS_PER_MP_LIMB == 32 + res_ptr[0] = u.ieee.mantissa1; /* Low-order 32 bits of fraction. */ + res_ptr[1] = u.ieee.mantissa0; /* High-order 32 bits. */ + #define N 2 +#elif BITS_PER_MP_LIMB == 64 + /* Hopefully the compiler will combine the two bitfield extracts + and this composition into just the original quadword extract. */ + res_ptr[0] = ((mp_limb_t) u.ieee.mantissa0 << 32) | u.ieee.mantissa1; + #define N 1 +#else + #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for" +#endif + + if (u.ieee.exponent == 0) + { + /* A biased exponent of zero is a special case. + Either it is a zero or it is a denormal number. */ + if (res_ptr[0] == 0 && res_ptr[N - 1] == 0) /* Assumes N<=2. */ + /* It's zero. */ + *expt = 0; + else + { + /* It is a denormal number, meaning it has no implicit leading + one bit, and its exponent is in fact the format minimum. */ + int cnt; + + /* One problem with Intel's 80-bit format is that the explicit + leading one in the normalized representation has to be zero + for denormalized number. If it is one, the number is according + to Intel's specification an invalid number. We make the + representation unique by explicitly clearing this bit. */ + res_ptr[N - 1] &= ~((mp_limb_t) 1 << ((LDBL_MANT_DIG - 1) % BITS_PER_MP_LIMB)); + + if (res_ptr[N - 1] != 0) + { + count_leading_zeros (cnt, res_ptr[N - 1]); + if (cnt != 0) + { +#if N == 2 + res_ptr[N - 1] = res_ptr[N - 1] << cnt + | (res_ptr[0] >> (BITS_PER_MP_LIMB - cnt)); + res_ptr[0] <<= cnt; +#else + res_ptr[N - 1] <<= cnt; +#endif + } + *expt = LDBL_MIN_EXP - 1 - cnt; + } + else if (res_ptr[0] != 0) + { + count_leading_zeros (cnt, res_ptr[0]); + res_ptr[N - 1] = res_ptr[0] << cnt; + res_ptr[0] = 0; + *expt = LDBL_MIN_EXP - 1 - BITS_PER_MP_LIMB - cnt; + } + else + { + /* This is the special case of the pseudo denormal number + with only the implicit leading bit set. The value is + in fact a normal number and so we have to treat this + case differently. */ +#if N == 2 + res_ptr[N - 1] = 0x80000000ul; +#else + res_ptr[0] = 0x8000000000000000ul; +#endif + *expt = LDBL_MIN_EXP - 1; + } + } + } + else if (u.ieee.exponent < 0x7fff +#if N == 2 + && res_ptr[0] == 0 +#endif + && res_ptr[N - 1] == 0) + /* Pseudo zero. */ + *expt = 0; + + return N; +} diff --git a/sysdeps/x86_64/ldbl2mpn.c b/sysdeps/x86_64/ldbl2mpn.c deleted file mode 100644 index 641b789cd4..0000000000 --- a/sysdeps/x86_64/ldbl2mpn.c +++ /dev/null @@ -1 +0,0 @@ -#include "../i386/ldbl2mpn.c" -- cgit 1.4.1