From cda7129cd28a25832ad06ed939d32fce9413db63 Mon Sep 17 00:00:00 2001
From: aiju <devnull@localhost>
Date: Thu, 3 May 2018 23:31:24 +0000
Subject: [PATCH] mplogic: don't drop carry out

---
 sys/src/libmp/port/mplogic.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/src/libmp/port/mplogic.c b/sys/src/libmp/port/mplogic.c
index 378bfc7ee..c60d56aab 100644
--- a/sys/src/libmp/port/mplogic.c
+++ b/sys/src/libmp/port/mplogic.c
@@ -36,7 +36,7 @@ mplogic(mpint *b1, mpint *b2, mpint *sum, int fl)
 		b2 = t;
 		fl = fl >> 2 & 0x03 | fl << 2 & 0x0c | fl & 0x30;
 	}
-	mpbits(sum, b1->top*Dbits);
+	mpbits(sum, b1->top*Dbits+1);
 	dp1 = b1->p;
 	dp2 = b2->p;
 	dpo = sum->p;
@@ -60,6 +60,8 @@ mplogic(mpint *b1, mpint *b2, mpint *sum, int fl)
 		dpo[i] = d;
 	}
 	sum->top = i;
+	if(co)
+		dpo[sum->top++] = co;
 	mpnorm(sum);
 }
 
@@ -105,7 +107,7 @@ mpxor(mpint *b1, mpint *b2, mpint *sum)
 	}
 	fl = (b1->sign & 10) ^ (b2->sign & 12);
 	sum->sign = (int)(fl << 28) >> 31 | 1;
-	mpbits(sum, b1->top*Dbits);
+	mpbits(sum, b1->top*Dbits+1);
 	dp1 = b1->p;
 	dp2 = b2->p;
 	dpo = sum->p;
@@ -126,6 +128,8 @@ mpxor(mpint *b1, mpint *b2, mpint *sum)
 		dpo[i] = d;
 	}
 	sum->top = i;
+	if(co)
+		dpo[sum->top++] = co;
 	mpnorm(sum);
 }