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According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
249 lines
6.9 KiB
C
249 lines
6.9 KiB
C
#ifndef INTERNAL_NUMERIC_H /*-*-C-*-vi:se ft=c:*/
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#define INTERNAL_NUMERIC_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @brief Internal header for Numeric.
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*/
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#include "internal/bignum.h" /* for BIGNUM_POSITIVE_P */
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#include "internal/bits.h" /* for RUBY_BIT_ROTL */
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#include "internal/fixnum.h" /* for FIXNUM_POSITIVE_P */
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#include "internal/vm.h" /* for rb_method_basic_definition_p */
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#include "ruby/intern.h" /* for rb_cmperr */
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#include "ruby/ruby.h" /* for USE_FLONUM */
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#define ROUND_TO(mode, even, up, down) \
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((mode) == RUBY_NUM_ROUND_HALF_EVEN ? even : \
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(mode) == RUBY_NUM_ROUND_HALF_UP ? up : down)
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#define ROUND_FUNC(mode, name) \
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ROUND_TO(mode, name##_half_even, name##_half_up, name##_half_down)
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#define ROUND_CALL(mode, name, args) \
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ROUND_TO(mode, name##_half_even args, \
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name##_half_up args, name##_half_down args)
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#ifndef ROUND_DEFAULT
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# define ROUND_DEFAULT RUBY_NUM_ROUND_HALF_UP
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#endif
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enum ruby_num_rounding_mode {
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RUBY_NUM_ROUND_HALF_UP,
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RUBY_NUM_ROUND_HALF_EVEN,
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RUBY_NUM_ROUND_HALF_DOWN,
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RUBY_NUM_ROUND_DEFAULT = ROUND_DEFAULT,
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};
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struct RFloat {
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struct RBasic basic;
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double float_value;
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};
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#define RFLOAT(obj) (R_CAST(RFloat)(obj))
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/* numeric.c */
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int rb_num_to_uint(VALUE val, unsigned int *ret);
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VALUE ruby_num_interval_step_size(VALUE from, VALUE to, VALUE step, int excl);
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double ruby_float_step_size(double beg, double end, double unit, int excl);
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int ruby_float_step(VALUE from, VALUE to, VALUE step, int excl, int allow_endless);
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int rb_num_negative_p(VALUE);
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VALUE rb_int_succ(VALUE num);
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VALUE rb_int_uminus(VALUE num);
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VALUE rb_float_uminus(VALUE num);
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VALUE rb_int_plus(VALUE x, VALUE y);
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VALUE rb_float_plus(VALUE x, VALUE y);
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VALUE rb_int_minus(VALUE x, VALUE y);
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VALUE rb_int_mul(VALUE x, VALUE y);
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VALUE rb_float_mul(VALUE x, VALUE y);
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VALUE rb_float_div(VALUE x, VALUE y);
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VALUE rb_int_idiv(VALUE x, VALUE y);
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VALUE rb_int_modulo(VALUE x, VALUE y);
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VALUE rb_int2str(VALUE num, int base);
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VALUE rb_fix_plus(VALUE x, VALUE y);
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VALUE rb_int_gt(VALUE x, VALUE y);
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VALUE rb_float_gt(VALUE x, VALUE y);
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VALUE rb_int_ge(VALUE x, VALUE y);
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enum ruby_num_rounding_mode rb_num_get_rounding_option(VALUE opts);
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double rb_int_fdiv_double(VALUE x, VALUE y);
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VALUE rb_int_pow(VALUE x, VALUE y);
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VALUE rb_float_pow(VALUE x, VALUE y);
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VALUE rb_int_cmp(VALUE x, VALUE y);
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VALUE rb_int_equal(VALUE x, VALUE y);
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VALUE rb_int_divmod(VALUE x, VALUE y);
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VALUE rb_int_and(VALUE x, VALUE y);
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VALUE rb_int_lshift(VALUE x, VALUE y);
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VALUE rb_int_div(VALUE x, VALUE y);
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VALUE rb_int_abs(VALUE num);
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VALUE rb_int_odd_p(VALUE num);
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int rb_int_positive_p(VALUE num);
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int rb_int_negative_p(VALUE num);
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VALUE rb_num_pow(VALUE x, VALUE y);
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VALUE rb_float_ceil(VALUE num, int ndigits);
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VALUE rb_float_abs(VALUE flt);
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static inline VALUE rb_num_compare_with_zero(VALUE num, ID mid);
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static inline int rb_num_positive_int_p(VALUE num);
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static inline int rb_num_negative_int_p(VALUE num);
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static inline double rb_float_flonum_value(VALUE v);
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static inline double rb_float_noflonum_value(VALUE v);
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static inline double rb_float_value_inline(VALUE v);
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static inline VALUE rb_float_new_inline(double d);
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static inline bool INT_POSITIVE_P(VALUE num);
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static inline bool INT_NEGATIVE_P(VALUE num);
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static inline bool FLOAT_ZERO_P(VALUE num);
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#define rb_float_value rb_float_value_inline
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#define rb_float_new rb_float_new_inline
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RUBY_SYMBOL_EXPORT_BEGIN
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/* numeric.c (export) */
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VALUE rb_int_positive_pow(long x, unsigned long y);
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RUBY_SYMBOL_EXPORT_END
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MJIT_SYMBOL_EXPORT_BEGIN
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VALUE rb_flo_div_flo(VALUE x, VALUE y);
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double ruby_float_mod(double x, double y);
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VALUE rb_float_equal(VALUE x, VALUE y);
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int rb_float_cmp(VALUE x, VALUE y);
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VALUE rb_float_eql(VALUE x, VALUE y);
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VALUE rb_fix_aref(VALUE fix, VALUE idx);
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MJIT_SYMBOL_EXPORT_END
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static inline bool
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INT_POSITIVE_P(VALUE num)
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{
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if (FIXNUM_P(num)) {
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return FIXNUM_POSITIVE_P(num);
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}
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else {
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return BIGNUM_POSITIVE_P(num);
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}
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}
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static inline bool
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INT_NEGATIVE_P(VALUE num)
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{
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if (FIXNUM_P(num)) {
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return FIXNUM_NEGATIVE_P(num);
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}
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else {
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return BIGNUM_NEGATIVE_P(num);
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}
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}
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static inline bool
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FLOAT_ZERO_P(VALUE num)
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{
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return RFLOAT_VALUE(num) == 0.0;
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}
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static inline VALUE
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rb_num_compare_with_zero(VALUE num, ID mid)
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{
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VALUE zero = INT2FIX(0);
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VALUE r = rb_check_funcall(num, mid, 1, &zero);
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if (r == Qundef) {
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rb_cmperr(num, zero);
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}
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return r;
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}
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static inline int
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rb_num_positive_int_p(VALUE num)
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{
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const ID mid = '>';
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if (FIXNUM_P(num)) {
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if (rb_method_basic_definition_p(rb_cInteger, mid))
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return FIXNUM_POSITIVE_P(num);
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}
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else if (RB_TYPE_P(num, T_BIGNUM)) {
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if (rb_method_basic_definition_p(rb_cInteger, mid))
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return BIGNUM_POSITIVE_P(num);
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}
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return RTEST(rb_num_compare_with_zero(num, mid));
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}
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static inline int
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rb_num_negative_int_p(VALUE num)
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{
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const ID mid = '<';
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if (FIXNUM_P(num)) {
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if (rb_method_basic_definition_p(rb_cInteger, mid))
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return FIXNUM_NEGATIVE_P(num);
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}
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else if (RB_TYPE_P(num, T_BIGNUM)) {
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if (rb_method_basic_definition_p(rb_cInteger, mid))
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return BIGNUM_NEGATIVE_P(num);
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}
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return RTEST(rb_num_compare_with_zero(num, mid));
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}
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static inline double
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rb_float_flonum_value(VALUE v)
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{
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#if USE_FLONUM
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if (v != (VALUE)0x8000000000000002) { /* LIKELY */
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union {
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double d;
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VALUE v;
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} t;
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VALUE b63 = (v >> 63);
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/* e: xx1... -> 011... */
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/* xx0... -> 100... */
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/* ^b63 */
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t.v = RUBY_BIT_ROTR((2 - b63) | (v & ~(VALUE)0x03), 3);
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return t.d;
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}
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#endif
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return 0.0;
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}
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static inline double
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rb_float_noflonum_value(VALUE v)
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{
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return RFLOAT(v)->float_value;
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}
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static inline double
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rb_float_value_inline(VALUE v)
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{
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if (FLONUM_P(v)) {
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return rb_float_flonum_value(v);
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}
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return rb_float_noflonum_value(v);
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}
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static inline VALUE
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rb_float_new_inline(double d)
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{
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#if USE_FLONUM
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union {
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double d;
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VALUE v;
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} t;
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int bits;
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t.d = d;
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bits = (int)((VALUE)(t.v >> 60) & 0x7);
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/* bits contains 3 bits of b62..b60. */
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/* bits - 3 = */
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/* b011 -> b000 */
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/* b100 -> b001 */
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if (t.v != 0x3000000000000000 /* 1.72723e-77 */ &&
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!((bits-3) & ~0x01)) {
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return (RUBY_BIT_ROTL(t.v, 3) & ~(VALUE)0x01) | 0x02;
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}
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else if (t.v == (VALUE)0) {
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/* +0.0 */
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return 0x8000000000000002;
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}
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/* out of range */
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#endif
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return rb_float_new_in_heap(d);
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}
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#endif /* INTERNAL_NUMERIC_H */
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