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authorKatie Hockman <katie@golang.org>2020-12-14 10:03:05 -0500
committerKatie Hockman <katie@golang.org>2020-12-14 10:06:13 -0500
commit0345ede87ee12698988973884cfc0fd3d499dffd (patch)
tree7123cff141ee5661208d2f5f437b8f5252ac7f6a /src/math/big/nat.go
parent4651d6b267818b0e0d128a5443289717c4bb8cbc (diff)
parent0a02371b0576964e81c3b40d328db9a3ef3b031b (diff)
downloadgo-0345ede87ee12698988973884cfc0fd3d499dffd.tar.xz
[dev.fuzz] all: merge master into dev.fuzz
Change-Id: I5d8c8329ccc9d747bd81ade6b1cb7cb8ae2e94b2
Diffstat (limited to 'src/math/big/nat.go')
-rw-r--r--src/math/big/nat.go5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/math/big/nat.go b/src/math/big/nat.go
index 6a3989bf9d..068176e1c1 100644
--- a/src/math/big/nat.go
+++ b/src/math/big/nat.go
@@ -751,6 +751,7 @@ func (q nat) divBasic(u, v nat) {
// D2.
vn1 := v[n-1]
+ rec := reciprocalWord(vn1)
for j := m; j >= 0; j-- {
// D3.
qhat := Word(_M)
@@ -760,7 +761,7 @@ func (q nat) divBasic(u, v nat) {
}
if ujn != vn1 {
var rhat Word
- qhat, rhat = divWW(ujn, u[j+n-1], vn1)
+ qhat, rhat = divWW(ujn, u[j+n-1], vn1, rec)
// x1 | x2 = q̂v_{n-2}
vn2 := v[n-2]
@@ -928,7 +929,7 @@ func (z nat) divRecursiveStep(u, v nat, depth int, tmp *nat, temps []*nat) {
// Now u < (v<<B), compute lower bits in the same way.
// Choose shift = B-1 again.
- s := B
+ s := B - 1
qhat := *temps[depth]
qhat.clear()
qhat.divRecursiveStep(u[s:].norm(), v[s:], depth+1, tmp, temps)