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bug right shifting 64 bits

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by a variable that equals 32

R=rsc
CC=golang-dev
https://golang.org/cl/2645042
This commit is contained in:
Ken Thompson 2010-10-21 18:15:00 -07:00
parent a89b0ed7e4
commit e5bd12ea90
1 changed files with 3 additions and 3 deletions
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6
src/cmd/5g/cgen64.c
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@ -439,12 +439,12 @@ olsh_break:
p3 = gbranch(ABLO, T);
// shift == 32
p1 = gins(AMOVW, &bh, &al);
p1->scond = C_SCOND_EQ;
if(bh.type->etype == TINT32)
p1 = gshift(AMOVW, &bh, SHIFT_AR, 31, &ah);
else
p1 = gins(AEOR, &al, &al);
p1->scond = C_SCOND_EQ;
p1 = gins(AMOVW, &bh, &al);
p1 = gins(AEOR, &ah, &ah);
p1->scond = C_SCOND_EQ;
p4 = gbranch(ABEQ, T);