diff --git a/bigdecimal.gemspec b/bigdecimal.gemspec index 15d4e146..c8be0770 100644 --- a/bigdecimal.gemspec +++ b/bigdecimal.gemspec @@ -19,6 +19,9 @@ Gem::Specification.new do |s| bigdecimal.gemspec ext/bigdecimal/bigdecimal.c ext/bigdecimal/bigdecimal.h + ext/bigdecimal/bits.h + ext/bigdecimal/feature.h + ext/bigdecimal/static_assert.h lib/bigdecimal.rb lib/bigdecimal/jacobian.rb lib/bigdecimal/ludcmp.rb diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c index 96fe253d..5a692428 100644 --- a/ext/bigdecimal/bigdecimal.c +++ b/ext/bigdecimal/bigdecimal.c @@ -30,18 +30,19 @@ #include #endif +#include "bits.h" +#include "static_assert.h" + /* #define ENABLE_NUMERIC_STRING */ -#define MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, min, max) ( \ - (a) == 0 ? 0 : \ - (a) == -1 ? (b) < -(max) : \ - (a) > 0 ? \ - ((b) > 0 ? (max) / (a) < (b) : (min) / (a) > (b)) : \ - ((b) > 0 ? (min) / (a) < (b) : (max) / (a) > (b))) #define SIGNED_VALUE_MAX INTPTR_MAX #define SIGNED_VALUE_MIN INTPTR_MIN #define MUL_OVERFLOW_SIGNED_VALUE_P(a, b) MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, SIGNED_VALUE_MIN, SIGNED_VALUE_MAX) +#define numberof(array) ((int)(sizeof(array) / sizeof((array)[0]))) +#define roomof(x, y) (((x) + (y) - 1) / (y)) +#define type_roomof(x, y) roomof(sizeof(x), sizeof(y)) + VALUE rb_cBigDecimal; VALUE rb_mBigMath; @@ -80,6 +81,8 @@ static ID id_half; #define DBLE_FIG rmpd_double_figures() /* figure of double */ #endif +#define LOG10_2 0.3010299956639812 + #ifndef RRATIONAL_ZERO_P # define RRATIONAL_ZERO_P(x) (FIXNUM_P(rb_rational_num(x)) && \ FIX2LONG(rb_rational_num(x)) == 0) @@ -2754,12 +2757,80 @@ check_exception(VALUE bd) } static VALUE -rb_inum_convert_to_BigDecimal(VALUE val, RB_UNUSED_VAR(size_t digs), int raise_exception) +rb_uint64_convert_to_BigDecimal(uint64_t uval, RB_UNUSED_VAR(size_t digs), int raise_exception) +{ + VALUE obj = TypedData_Wrap_Struct(rb_cBigDecimal, &BigDecimal_data_type, 0); + + Real *vp; + if (uval == 0) { + vp = VpAllocReal(1); + vp->MaxPrec = 1; + vp->Prec = 1; + vp->exponent = 1; + VpSetZero(vp, 1); + vp->frac[0] = 0; + } + else if (uval < BASE) { + vp = VpAllocReal(1); + vp->MaxPrec = 1; + vp->Prec = 1; + vp->exponent = 1; + VpSetSign(vp, 1); + vp->frac[0] = (BDIGIT)uval; + } + else { + const size_t len10 = ceil(LOG10_2 * bit_length(uval)); + size_t len = roomof(len10, BASE_FIG); + + vp = VpAllocReal(len); + vp->MaxPrec = len; + vp->Prec = len; + vp->exponent = len; + VpSetSign(vp, 1); + + size_t i; + for (i = 0; i < len; ++i) { + BDIGIT r = uval % BASE; + vp->frac[len - i - 1] = r; + uval /= BASE; + } + } + + return BigDecimal_wrap_struct(obj, vp); +} + +static VALUE +rb_int64_convert_to_BigDecimal(int64_t ival, size_t digs, int raise_exception) +{ + const uint64_t uval = (ival < 0) ? (((uint64_t)-(ival+1))+1) : (uint64_t)ival; + VALUE bd = rb_uint64_convert_to_BigDecimal(uval, digs, raise_exception); + if (ival < 0) { + Real *vp; + TypedData_Get_Struct(bd, Real, &BigDecimal_data_type, vp); + VpSetSign(vp, -1); + } + return bd; +} + +static VALUE +rb_big_convert_to_BigDecimal(VALUE val, RB_UNUSED_VAR(size_t digs), int raise_exception) { Real *vp = GetVpValue(val, 1); return check_exception(vp->obj); } +static VALUE +rb_inum_convert_to_BigDecimal(VALUE val, RB_UNUSED_VAR(size_t digs), int raise_exception) +{ + assert(RB_INTEGER_TYPE_P(val)); + if (FIXNUM_P(val)) { + return rb_int64_convert_to_BigDecimal(FIX2LONG(val), digs, raise_exception); + } + else { + return rb_big_convert_to_BigDecimal(val, digs, raise_exception); + } +} + static VALUE rb_float_convert_to_BigDecimal(VALUE val, size_t digs, int raise_exception) { diff --git a/ext/bigdecimal/bits.h b/ext/bigdecimal/bits.h new file mode 100644 index 00000000..5dfda497 --- /dev/null +++ b/ext/bigdecimal/bits.h @@ -0,0 +1,137 @@ +#ifndef BIGDECIMAL_BITS_H +#define BIGDECIMAL_BITS_H + +#include "feature.h" +#include "static_assert.h" + +#if defined(HAVE_X86INTRIN_H) +# include /* for _lzcnt_u64 */ +#elif defined(_MSC_VER) && _MSC_VER >= 1310 +# include /* for the following intrinsics */ +#endif + +#if defined(_MSC_VER) && defined(__AVX2__) +# pragma intrinsic(__lzcnt) +# pragma intrinsic(__lzcnt64) +#endif + +#define MUL_OVERFLOW_SIGNED_INTEGER_P(a, b, min, max) ( \ + (a) == 0 ? 0 : \ + (a) == -1 ? (b) < -(max) : \ + (a) > 0 ? \ + ((b) > 0 ? (max) / (a) < (b) : (min) / (a) > (b)) : \ + ((b) > 0 ? (min) / (a) < (b) : (max) / (a) > (b))) + +#ifdef HAVE_UINT128_T +# define bit_length(x) \ + (unsigned int) \ + (sizeof(x) <= sizeof(int32_t) ? 32 - nlz_int32((uint32_t)(x)) : \ + sizeof(x) <= sizeof(int64_t) ? 64 - nlz_int64((uint64_t)(x)) : \ + 128 - nlz_int128((uint128_t)(x))) +#else +# define bit_length(x) \ + (unsigned int) \ + (sizeof(x) <= sizeof(int32_t) ? 32 - nlz_int32((uint32_t)(x)) : \ + 64 - nlz_int64((uint64_t)(x))) +#endif + +static inline unsigned nlz_int32(uint32_t x); +static inline unsigned nlz_int64(uint64_t x); +#ifdef HAVE_UINT128_T +static inline unsigned nlz_int128(uint128_t x); +#endif + +static inline unsigned int +nlz_int32(uint32_t x) +{ +#if defined(_MSC_VER) && defined(__AVX2__) + /* Note: It seems there is no such thing like __LZCNT__ predefined in MSVC. + * AMD CPUs have had this instruction for decades (since K10) but for + * Intel, Haswell is the oldest one. We need to use __AVX2__ for maximum + * safety. */ + return (unsigned int)__lzcnt(x); + +#elif defined(__x86_64__) && defined(__LZCNT__) /* && ! defined(MJIT_HEADER) */ + return (unsigned int)_lzcnt_u32(x); + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 /* &&! defined(__AVX2__) */ + unsigned long r; + return _BitScanReverse(&r, x) ? (31 - (int)r) : 32; + +#elif __has_builtin(__builtin_clz) + STATIC_ASSERT(sizeof_int, sizeof(int) * CHAR_BIT == 32); + return x ? (unsigned int)__builtin_clz(x) : 32; + +#else + uint32_t y; + unsigned n = 32; + y = x >> 16; if (y) {n -= 16; x = y;} + y = x >> 8; if (y) {n -= 8; x = y;} + y = x >> 4; if (y) {n -= 4; x = y;} + y = x >> 2; if (y) {n -= 2; x = y;} + y = x >> 1; if (y) {return n - 2;} + return (unsigned int)(n - x); +#endif +} + +static inline unsigned int +nlz_int64(uint64_t x) +{ +#if defined(_MSC_VER) && defined(__AVX2__) + return (unsigned int)__lzcnt64(x); + +#elif defined(__x86_64__) && defined(__LZCNT__) /* && ! defined(MJIT_HEADER) */ + return (unsigned int)_lzcnt_u64(x); + +#elif defined(_WIN64) && defined(_MSC_VER) && _MSC_VER >= 1400 /* &&! defined(__AVX2__) */ + unsigned long r; + return _BitScanReverse64(&r, x) ? (63u - (unsigned int)r) : 64; + +#elif __has_builtin(__builtin_clzl) + if (x == 0) { + return 64; + } + else if (sizeof(long) * CHAR_BIT == 64) { + return (unsigned int)__builtin_clzl((unsigned long)x); + } + else if (sizeof(long long) * CHAR_BIT == 64) { + return (unsigned int)__builtin_clzll((unsigned long long)x); + } + else { + /* :FIXME: Is there a way to make this branch a compile-time error? */ + __builtin_unreachable(); + } + +#else + uint64_t y; + unsigned int n = 64; + y = x >> 32; if (y) {n -= 32; x = y;} + y = x >> 16; if (y) {n -= 16; x = y;} + y = x >> 8; if (y) {n -= 8; x = y;} + y = x >> 4; if (y) {n -= 4; x = y;} + y = x >> 2; if (y) {n -= 2; x = y;} + y = x >> 1; if (y) {return n - 2;} + return (unsigned int)(n - x); + +#endif +} + +#ifdef HAVE_UINT128_T +static inline unsigned int +nlz_int128(uint128_t x) +{ + uint64_t y = (uint64_t)(x >> 64); + + if (x == 0) { + return 128; + } + else if (y == 0) { + return (unsigned int)nlz_int64(x) + 64; + } + else { + return (unsigned int)nlz_int64(y); + } +} +#endif + +#endif /* BIGDECIMAL_BITS_H */ diff --git a/ext/bigdecimal/extconf.rb b/ext/bigdecimal/extconf.rb index 41b8df8d..ab856b8d 100644 --- a/ext/bigdecimal/extconf.rb +++ b/ext/bigdecimal/extconf.rb @@ -16,6 +16,20 @@ def check_bigdecimal_version(gemspec_path) message "#{bigdecimal_version}\n" end +def have_builtin_func(name, check_expr, opt = "", &b) + checking_for checking_message(name.funcall_style, nil, opt) do + if try_compile(< +#endif + +#ifdef RBIMPL_HAS_BUILTIN +# define BIGDECIMAL_HAS_BUILTIN(...) RBIMPL_HAS_BUILTIN(__VA_ARGS__) + +#else +# /* The following section is copied from CRuby's builtin.h */ +# +# ifdef __has_builtin +# if defined(__INTEL_COMPILER) +# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is +# * reportedly broken. We have to skip them. However the situation can +# * change. They might improve someday. We need to revisit here later. */ +# elif defined(__GNUC__) && ! __has_builtin(__builtin_alloca) +# /* FreeBSD's defines its own *broken* version of +# * __has_builtin. Cygwin copied that content to be a victim of the +# * broken-ness. We don't take them into account. */ +# else +# define HAVE___HAS_BUILTIN 1 +# endif +# endif +# +# if defined(HAVE___HAS_BUILTIN) +# define BIGDECIMAL_HAS_BUILTIN(_) __has_builtin(_) +# +# elif defined(__GNUC__) +# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _ +# if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 6)) +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 1 +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 1 +# else +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz 0 +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl 0 +# endif +# elif defined(_MSC_VER) +# define BIGDECIMAL_HAS_BUILTIN(_) 0 +# +# else +# define BIGDECIMAL_HAS_BUILTIN(_) BIGDECIMAL_HAS_BUILTIN_ ## _ +# define BIGDECIMAL_HAS_BUILTIN___builtin_clz HAVE_BUILTIN___BUILTIN_CLZ +# define BIGDECIMAL_HAS_BUILTIN___builtin_clzl HAVE_BUILTIN___BUILTIN_CLZL +# endif +#endif /* RBIMPL_HAS_BUILTIN */ + +#ifndef __has_builtin +# define __has_builtin(...) BIGDECIMAL_HAS_BUILTIN(__VA_ARGS__) +#endif + +#endif /* BIGDECIMAL_HAS_FEATURE_H */ diff --git a/ext/bigdecimal/static_assert.h b/ext/bigdecimal/static_assert.h new file mode 100644 index 00000000..9295729b --- /dev/null +++ b/ext/bigdecimal/static_assert.h @@ -0,0 +1,54 @@ +#ifndef BIGDECIMAL_STATIC_ASSERT_H +#define BIGDECIMAL_STATIC_ASSERT_H + +#include "feature.h" + +#ifdef HAVE_RUBY_INTERNAL_STATIC_ASSERT_H +# include +#endif + +#ifdef RBIMPL_STATIC_ASSERT +# define STATIC_ASSERT RBIMPL_STATIC_ASSERT +#endif + +#ifndef STATIC_ASSERT +# /* The following section is copied from CRuby's static_assert.h */ + +# if defined(__cplusplus) && defined(__cpp_static_assert) +# /* https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations */ +# define BIGDECIMAL_STATIC_ASSERT0 static_assert + +# elif defined(__cplusplus) && defined(_MSC_VER) && _MSC_VER >= 1600 +# define BIGDECIMAL_STATIC_ASSERT0 static_assert + +# elif defined(__INTEL_CXX11_MODE__) +# define BIGDECIMAL_STATIC_ASSERT0 static_assert + +# elif defined(__cplusplus) && __cplusplus >= 201103L +# define BIGDECIMAL_STATIC_ASSERT0 static_assert + +# elif defined(__cplusplus) && __has_extension(cxx_static_assert) +# define BIGDECIMAL_STATIC_ASSERT0 __extension__ static_assert + +# elif defined(__STDC_VERSION__) && __has_extension(c_static_assert) +# define BIGDECIMAL_STATIC_ASSERT0 __extension__ _Static_assert + +# elif defined(__STDC_VERSION__) && defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) +# define BIGDECIMAL_STATIC_ASSERT0 __extension__ _Static_assert +#endif + +# if defined(__DOXYGEN__) +# define STATIC_ASSERT static_assert + +# elif defined(BIGDECIMAL_STATIC_ASSERT0) +# define STATIC_ASSERT(name, expr) \ + BIGDECIMAL_STATIC_ASSERT0(expr, #name ": " #expr) + +# else +# define STATIC_ASSERT(name, expr) \ + typedef int static_assert_ ## name ## _check[1 - 2 * !(expr)] +# endif +#endif /* STATIC_ASSERT */ + + +#endif /* BIGDECIMAL_STATIC_ASSERT_H */ diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb index 6ce9c3b8..8d90972b 100644 --- a/test/bigdecimal/test_bigdecimal.rb +++ b/test/bigdecimal/test_bigdecimal.rb @@ -1,6 +1,7 @@ # frozen_string_literal: false require_relative "testbase" require 'bigdecimal/math' +require 'rbconfig/sizeof' class TestBigDecimal < Test::Unit::TestCase include TestBigDecimalBase @@ -104,10 +105,26 @@ def test_BigDecimal_with_invalid_string end def test_BigDecimal_with_integer + assert_equal(BigDecimal("0"), BigDecimal(0)) assert_equal(BigDecimal("1"), BigDecimal(1)) assert_equal(BigDecimal("-1"), BigDecimal(-1)) assert_equal(BigDecimal((2**100).to_s), BigDecimal(2**100)) assert_equal(BigDecimal((-2**100).to_s), BigDecimal(-2**100)) + + assert_equal(BigDecimal(RbConfig::LIMITS["FIXNUM_MIN"].to_s), + BigDecimal(RbConfig::LIMITS["FIXNUM_MIN"])) + + assert_equal(BigDecimal(RbConfig::LIMITS["FIXNUM_MAX"].to_s), + BigDecimal(RbConfig::LIMITS["FIXNUM_MAX"])) + + assert_equal(BigDecimal(RbConfig::LIMITS["INT64_MIN"].to_s), + BigDecimal(RbConfig::LIMITS["INT64_MIN"])) + + assert_equal(BigDecimal(RbConfig::LIMITS["INT64_MAX"].to_s), + BigDecimal(RbConfig::LIMITS["INT64_MAX"])) + + assert_equal(BigDecimal(RbConfig::LIMITS["UINT64_MAX"].to_s), + BigDecimal(RbConfig::LIMITS["UINT64_MAX"])) end def test_BigDecimal_with_rational