Commit 8d8d324e authored by Richard Henderson's avatar Richard Henderson
Browse files

target-alpha: Rewrite helper_zapnot 



This form produces significantly smaller code on x86_64.

Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 57a808b6

target-alpha/int_helper.c

+12 −18
Original line number Diff line number Diff line
@@ -37,31 +37,25 @@ uint64_t helper_cttz(uint64_t arg) 
    return ctz64(arg);

}



static inline uint64_t byte_zap(uint64_t op, uint8_t mskb)

uint64_t helper_zapnot(uint64_t val, uint64_t mskb)

{

    uint64_t mask;



    mask = 0;

    mask |= ((mskb >> 0) & 1) * 0x00000000000000FFULL;

    mask |= ((mskb >> 1) & 1) * 0x000000000000FF00ULL;

    mask |= ((mskb >> 2) & 1) * 0x0000000000FF0000ULL;

    mask |= ((mskb >> 3) & 1) * 0x00000000FF000000ULL;

    mask |= ((mskb >> 4) & 1) * 0x000000FF00000000ULL;

    mask |= ((mskb >> 5) & 1) * 0x0000FF0000000000ULL;

    mask |= ((mskb >> 6) & 1) * 0x00FF000000000000ULL;

    mask |= ((mskb >> 7) & 1) * 0xFF00000000000000ULL;

    mask  = -(mskb & 0x01) & 0x00000000000000ffull;

    mask |= -(mskb & 0x02) & 0x000000000000ff00ull;

    mask |= -(mskb & 0x04) & 0x0000000000ff0000ull;

    mask |= -(mskb & 0x08) & 0x00000000ff000000ull;

    mask |= -(mskb & 0x10) & 0x000000ff00000000ull;

    mask |= -(mskb & 0x20) & 0x0000ff0000000000ull;

    mask |= -(mskb & 0x40) & 0x00ff000000000000ull;

    mask |= -(mskb & 0x80) & 0xff00000000000000ull;



    return op & ~mask;

    return val & mask;

}



uint64_t helper_zap(uint64_t val, uint64_t mask)

{

    return byte_zap(val, mask);

}



uint64_t helper_zapnot(uint64_t val, uint64_t mask)

{

    return byte_zap(val, ~mask);

    return helper_zapnot(val, ~mask);

}



uint64_t helper_cmpbge(uint64_t op1, uint64_t op2)