Commit a1756896 authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-s390: Fix off-by-one in wraparound andi 



Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 450445d5

tcg/s390/tcg-target.c

+2 −2
Original line number Diff line number Diff line
@@ -983,8 +983,8 @@ static void tgen_andi(TCGContext *s, TCGType type, TCGReg dest, uint64_t val) 
        int msb, lsb;

        if ((val & 0x8000000000000001ull) == 0x8000000000000001ull) {

            /* Achieve wraparound by swapping msb and lsb.  */

            msb = 63 - ctz64(~val);

            lsb = clz64(~val) + 1;

            msb = 64 - ctz64(~val);

            lsb = clz64(~val) - 1;

        } else {

            msb = clz64(val);

            lsb = 63 - ctz64(val);