ensure signbit is set for Int64

Updates: #76 Former-commit-id: 9384ac37e5b502b2f03e3545065e4c7c0d54f8a4 [formerly 8d7c469] Former-commit-id: 52736a2
ericlagergren · Feb 1, 2018 · 6752a26 · 6752a26
1 parent cc974b8
commit 6752a26
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/big.go b/big.go
@@ -775,6 +775,9 @@ func (x *Big) Int64() (int64, bool) {
 	}
 	su := int64(u)
 	if su >= 0 || x.Signbit() && su == -su {
+		if x.Signbit() {
+			su = -su
+		}
 		return su, true
 	}
 	return 0, false

diff --git a/big_ctx.go b/big_ctx.go
@@ -334,7 +334,7 @@ func (c Context) Quantize(z *Big, n int) *Big {
 	}
 
 	z.exp = n
-	if shift == 0 || z.compact == 0 {
+	if shift == 0 {
 		return z
 	}
 
@@ -359,7 +359,7 @@ func (c Context) Quantize(z *Big, n int) *Big {
 	}
 
 	if shift > 0 {
-		_ = checked.MulBigPow10(&z.unscaled, &z.unscaled, uint64(shift))
+		checked.MulBigPow10(&z.unscaled, &z.unscaled, uint64(shift))
 		z.precision = arith.BigLength(&z.unscaled)
 	} else {
 		z.quoBig(m, &z.unscaled, neg, arith.BigPow10(uint64(-shift)), 0)