47 lines
1.3 KiB
Diff
47 lines
1.3 KiB
Diff
|
From 0b89d6d5f9f8c788f4391d8a0499f10aed624371 Mon Sep 17 00:00:00 2001
|
||
|
|
From: ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
|
||
|
|
Date: Mon, 27 Aug 2012 09:22:21 +0000
|
||
|
|
Subject: [PATCH] * include/ruby/ruby.h (rb_float_value): optimize it. This
|
||
|
|
technique was pointed by shinichiro.hamaji
|
||
|
|
<http://shinh.skr.jp/m/?date=20120825#p02>.
|
||
|
|
|
||
|
|
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
|
||
|
|
---
|
||
|
|
ChangeLog | 6 ++++++
|
||
|
|
include/ruby/ruby.h | 10 +++++-----
|
||
|
|
2 files changed, 11 insertions(+), 5 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
|
||
|
|
index 3905b32..b8b2267 100644
|
||
|
|
--- a/include/ruby/ruby.h
|
||
|
|
+++ b/include/ruby/ruby.h
|
||
|
|
@@ -733,10 +733,7 @@ struct RFloat {
|
||
|
|
rb_float_value(VALUE v)
|
||
|
|
{
|
||
|
|
if (FLONUM_P(v)) {
|
||
|
|
- if (v == (VALUE)0x8000000000000002) {
|
||
|
|
- return 0.0;
|
||
|
|
- }
|
||
|
|
- else {
|
||
|
|
+ if (v != (VALUE)0x8000000000000002) { /* LIKELY */
|
||
|
|
union {
|
||
|
|
double d;
|
||
|
|
VALUE v;
|
||
|
|
@@ -746,9 +743,12 @@ struct RFloat {
|
||
|
|
/* e: xx1... -> 011... */
|
||
|
|
/* xx0... -> 100... */
|
||
|
|
/* ^b63 */
|
||
|
|
- t.v = RUBY_BIT_ROTR(((b63 ^ 1) << 1) | b63 | (v & ~0x03), 3);
|
||
|
|
+ t.v = RUBY_BIT_ROTR(2 - b63 | (v & ~0x03), 3);
|
||
|
|
return t.d;
|
||
|
|
}
|
||
|
|
+ else {
|
||
|
|
+ return 0.0;
|
||
|
|
+ }
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
return ((struct RFloat *)v)->float_value;
|
||
|
|
--
|
||
|
|
1.7.10
|
||
|
|
|