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- fix performance bug (makeN always allocated a new vector)

Browse Source 
- removed defs.go (moved declarations into arith.go where they belong)

R=r
DELTA=40  (16 added, 20 deleted, 4 changed)
OCL=33464
CL=33464
This commit is contained in:
Robert Griesemer 2009-08-18 11:48:47 -07:00
parent ac5093fc22
commit 116b52d276
4 changed files with 18 additions and 22 deletions
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1
src/pkg/big/Makefile
View File

@ -6,7 +6,6 @@ include $(GOROOT)/src/Make.$(GOARCH)
TARG=big
GOFILES=\
defs.go\
arith.go\
big.go\
nat.go\

12
src/pkg/big/arith.go
View File

@ -10,6 +10,18 @@ package big
import "unsafe"
type Word uintptr
const (
_S = uintptr(unsafe.Sizeof(Word)); // TODO(gri) should Sizeof return a uintptr?
_W = _S*8;
_B = 1<<_W;
_M = _B-1;
_W2 = _W/2;
_B2 = 1<<_W2;
_M2 = _B2-1;
)
// ----------------------------------------------------------------------------
// Elementary operations on words

19
src/pkg/big/defs.go
View File

@ -1,19 +0,0 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package big
import "unsafe"
type Word uintptr
const (
_S = uintptr(unsafe.Sizeof(Word)); // TODO(gri) should Sizeof return a uintptr?
_W = _S*8;
_B = 1<<_W;
_M = _B-1;
_W2 = _W/2;
_B2 = 1<<_W2;
_M2 = _B2-1;
)

8
src/pkg/big/nat.go
View File

@ -36,10 +36,14 @@ func normN(z []Word) []Word {
func makeN(z []Word, m int, clear bool) []Word {
if len(z) > m {
z = z[0 : m]; // reuse z - has at least one extra word for a carry, if any
for i := range z {
z[i] = 0;
if clear {
for i := range z {
z[i] = 0;
}
}
return z;
}
c := 4; // minimum capacity
if m > c {
c = m;