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ruby/util.h: DECIMAL_SIZE_OF_BITS

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* include/ruby/util.h (DECIMAL_SIZE_OF_BITS): a preprocessor
  constant macro to approximate decimal representation size of n-bits
  integer.
* iseq.c (register_label): use DECIMAL_SIZE_OF_BITS for better
  approximation.
* ext/bigdecimal/bigdecimal.c (BigMath_s_log): ditto.
* common.mk (iseq.o), ext/bigdecimal/depend (bigdecimal.o): add
  dependency to ruby/util.h for DECIMAL_SIZE_OF_BITS.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44562 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-01-12 00:21:37 +00:00
parent 0e9cad9a8e
commit 5e9b7bacc3
6 changed files with 25 additions and 4 deletions
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14
ChangeLog
View file

@ -1,3 +1,17 @@
Sun Jan 12 09:21:35 2014 Nobuyoshi Nakada <nobu@ruby-lang.org>
* include/ruby/util.h (DECIMAL_SIZE_OF_BITS): a preprocessor
constant macro to approximate decimal representation size of n-bits
integer.
* iseq.c (register_label): use DECIMAL_SIZE_OF_BITS for better
approximation.
* ext/bigdecimal/bigdecimal.c (BigMath_s_log): ditto.
* common.mk (iseq.o), ext/bigdecimal/depend (bigdecimal.o): add
dependency to ruby/util.h for DECIMAL_SIZE_OF_BITS.
Fri Jan 10 16:27:20 2014 Yuki Yugui Sonoda <yugui@google.com>
* vm_exec.c (cfp): Avoid generating invalid binary for

4
common.mk
View file

@ -786,7 +786,9 @@ compile.$(OBJEXT): {$(VPATH)}compile.c {$(VPATH)}iseq.h \
{$(VPATH)}internal.h {$(VPATH)}vm_opts.h
iseq.$(OBJEXT): {$(VPATH)}iseq.c {$(VPATH)}gc.h {$(VPATH)}iseq.h \
$(RUBY_H_INCLUDES) $(VM_CORE_H_INCLUDES) {$(VPATH)}insns.inc \
{$(VPATH)}insns_info.inc {$(VPATH)}node_name.inc {$(VPATH)}internal.h {$(VPATH)}vm_opts.h {$(VPATH)}ruby_atomic.h {$(VPATH)}eval_intern.h
{$(VPATH)}insns_info.inc {$(VPATH)}node_name.inc {$(VPATH)}internal.h \
{$(VPATH)}vm_opts.h {$(VPATH)}ruby_atomic.h {$(VPATH)}eval_intern.h \
{$(VPATH)}util.h
vm.$(OBJEXT): {$(VPATH)}vm.c {$(VPATH)}gc.h {$(VPATH)}iseq.h \
{$(VPATH)}eval_intern.h $(RUBY_H_INCLUDES) $(ENCODING_H_INCLUDES) \
$(VM_CORE_H_INCLUDES) {$(VPATH)}vm_method.c {$(VPATH)}vm_eval.c \

3
ext/bigdecimal/bigdecimal.c
View file

@ -18,6 +18,7 @@
# define BIGDECIMAL_ENABLE_VPRINT 1
#endif
#include "bigdecimal.h"
#include "ruby/util.h"
#ifndef BIGDECIMAL_DEBUG
# define NDEBUG
@ -2919,7 +2920,7 @@ get_vp_value:
RB_GC_GUARD(vn) = SSIZET2NUM(n);
expo = VpExponent10(vx);
if (expo < 0 || expo >= 3) {
char buf[SIZEOF_VALUE * CHAR_BIT / 3 + 4];
char buf[DECIMAL_SIZE_OF_BITS(SIZEOF_VALUE * CHAR_BIT) + 4];
snprintf(buf, sizeof(buf), "1E%"PRIdVALUE, -expo);
x = BigDecimal_mult2(x, ToValue(VpCreateRbObject(1, buf)), vn);
}

2
ext/bigdecimal/depend
View file

@ -1 +1 @@
bigdecimal.o: bigdecimal.c bigdecimal.h $(HDRS) $(ruby_headers)
bigdecimal.o: bigdecimal.c bigdecimal.h $(HDRS) $(ruby_headers) $(hdrdir)/ruby/util.h

3
include/ruby/util.h
View file

@ -47,6 +47,9 @@ extern "C" {
RUBY_SYMBOL_EXPORT_BEGIN
#define DECIMAL_SIZE_OF_BITS(n) (((n) * 3010 + 9998) / 9999)
/* an approximation of ceil(n * log10(2)), upto 65536 at least */
#define scan_oct(s,l,e) ((int)ruby_scan_oct((s),(l),(e)))
unsigned long ruby_scan_oct(const char *, size_t, size_t *);
#define scan_hex(s,l,e) ((int)ruby_scan_hex((s),(l),(e)))

3
iseq.c
View file

@ -10,6 +10,7 @@
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/util.h"
#include "internal.h"
#include "eval_intern.h"
@ -1612,7 +1613,7 @@ static VALUE
register_label(struct st_table *table, unsigned long idx)
{
VALUE sym;
char buff[8 + (sizeof(idx) * CHAR_BIT * 32 / 100)];
char buff[7 + DECIMAL_SIZE_OF_BITS(sizeof(idx) * CHAR_BIT)];
snprintf(buff, sizeof(buff), "label_%lu", idx);
sym = ID2SYM(rb_intern(buff));