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mplogic: don't drop carry out

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This commit is contained in:
aiju 2018-05-03 23:31:24 +00:00
parent 98a5fc6535
commit cda7129cd2
1 changed files with 6 additions and 2 deletions
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8
sys/src/libmp/port/mplogic.c
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@ -36,7 +36,7 @@ mplogic(mpint *b1, mpint *b2, mpint *sum, int fl)
b2 = t; b2 = t;
fl = fl >> 2 & 0x03 | fl << 2 & 0x0c | fl & 0x30; fl = fl >> 2 & 0x03 | fl << 2 & 0x0c | fl & 0x30;
} }
mpbits(sum, b1->top*Dbits); mpbits(sum, b1->top*Dbits+1);
dp1 = b1->p; dp1 = b1->p;
dp2 = b2->p; dp2 = b2->p;
dpo = sum->p; dpo = sum->p;
@ -60,6 +60,8 @@ mplogic(mpint *b1, mpint *b2, mpint *sum, int fl)
dpo[i] = d; dpo[i] = d;
} }
sum->top = i; sum->top = i;
if(co)
dpo[sum->top++] = co;
mpnorm(sum); mpnorm(sum);
} }
@ -105,7 +107,7 @@ mpxor(mpint *b1, mpint *b2, mpint *sum)
} }
fl = (b1->sign & 10) ^ (b2->sign & 12); fl = (b1->sign & 10) ^ (b2->sign & 12);
sum->sign = (int)(fl << 28) >> 31 | 1; sum->sign = (int)(fl << 28) >> 31 | 1;
mpbits(sum, b1->top*Dbits); mpbits(sum, b1->top*Dbits+1);
dp1 = b1->p; dp1 = b1->p;
dp2 = b2->p; dp2 = b2->p;
dpo = sum->p; dpo = sum->p;
@ -126,6 +128,8 @@ mpxor(mpint *b1, mpint *b2, mpint *sum)
dpo[i] = d; dpo[i] = d;
} }
sum->top = i; sum->top = i;
if(co)
dpo[sum->top++] = co;
mpnorm(sum); mpnorm(sum);
} }