Commit f5790c3b authored by Peter Maydell's avatar Peter Maydell
Browse files

Revert "target-alpha: Add vector implementation for CMPBGE" 



This reverts commit 32ad48ab.

Unfortunately the SSE2 code here fails to compile on some versions
of gcc:
 target-alpha/int_helper.c:77:24: error: invalid operands to binary >=
 (have '__vector(16) unsigned char' and '__vector(16) unsigned char')

Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 27e1259a

target-alpha/int_helper.c

+0 −37
Original line number Diff line number Diff line
@@ -60,42 +60,6 @@ uint64_t helper_zap(uint64_t val, uint64_t mask) 


uint64_t helper_cmpbge(uint64_t op1, uint64_t op2)

{

#if defined(__SSE2__)

    uint64_t r;



    /* The cmpbge instruction is heavily used in the implementation of

       every string function on Alpha.  We can do much better than either

       the default loop below, or even an unrolled version by using the

       native vector support.  */

    {

        typedef uint64_t Q __attribute__((vector_size(16)));

        typedef uint8_t B __attribute__((vector_size(16)));



        Q q1 = (Q){ op1, 0 };

        Q q2 = (Q){ op2, 0 };



        q1 = (Q)((B)q1 >= (B)q2);



        r = q1[0];

    }



    /* Select only one bit from each byte.  */

    r &= 0x0101010101010101;



    /* Collect the bits into the bottom byte.  */

    /* .......A.......B.......C.......D.......E.......F.......G.......H */

    r |= r >> (8 - 1);



    /* .......A......AB......BC......CD......DE......EF......FG......GH */

    r |= r >> (16 - 2);



    /* .......A......AB.....ABC....ABCD....BCDE....CDEF....DEFG....EFGH */

    r |= r >> (32 - 4);



    /* .......A......AB.....ABC....ABCD...ABCDE..ABCDEF.ABCDEFGABCDEFGH */

    /* Return only the low 8 bits.  */

    return r & 0xff;

#else

    uint8_t opa, opb, res;

    int i;
@@ -108,7 +72,6 @@ uint64_t helper_cmpbge(uint64_t op1, uint64_t op2) 
        }

    }

    return res;

#endif

}



uint64_t helper_minub8(uint64_t op1, uint64_t op2)