Commit a9249dff authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-ppc64: Improve and_i32 with constant 



Use RLWINM

Reviewed-by: default avatarAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent dce74c57

tcg/ppc64/tcg-target.c

+49 −1
Original line number Diff line number Diff line
@@ -527,6 +527,48 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg ret, 
    }

}



static inline bool mask_operand(uint32_t c, int *mb, int *me)

{

    uint32_t lsb, test;



    /* Accept a bit pattern like:

           0....01....1

           1....10....0

           0..01..10..0

       Keep track of the transitions.  */

    if (c == 0 || c == -1) {

        return false;

    }

    test = c;

    lsb = test & -test;

    test += lsb;

    if (test & (test - 1)) {

        return false;

    }



    *me = clz32(lsb);

    *mb = test ? clz32(test & -test) + 1 : 0;

    return true;

}



static void tcg_out_andi32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c)

{

    int mb, me;



    if ((c & 0xffff) == c) {

        tcg_out32(s, ANDI | SAI(src, dst, c));

        return;

    } else if ((c & 0xffff0000) == c) {

        tcg_out32(s, ANDIS | SAI(src, dst, c >> 16));

        return;

    } else if (mask_operand(c, &mb, &me)) {

        tcg_out_rlw(s, RLWINM, dst, src, 0, mb, me);

    } else {

        tcg_out_movi(s, TCG_TYPE_I32, 0, c);

        tcg_out32(s, AND | SAB(src, dst, 0));

    }

}



static void tcg_out_zori32(TCGContext *s, TCGReg dst, TCGReg src, uint32_t c,

                           int op_lo, int op_hi)

{
@@ -1352,8 +1394,14 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args, 
        }

        break;



    case INDEX_op_and_i64:

    case INDEX_op_and_i32:

        if (const_args[2]) {

            tcg_out_andi32(s, args[0], args[1], args[2]);

        } else {

            tcg_out32(s, AND | SAB(args[1], args[0], args[2]));

        }

        break;

    case INDEX_op_and_i64:

        if (const_args[2]) {

            if ((args[2] & 0xffff) == args[2]) {

                tcg_out32(s, ANDI | SAI(args[1], args[0], args[2]));

tcg/ppc64/tcg-target.h

+4 −2
Original line number Diff line number Diff line
@@ -67,13 +67,15 @@ typedef enum { 
#define TCG_TARGET_STACK_ALIGN 16

#define TCG_TARGET_CALL_STACK_OFFSET 48



/* optional instructions automatically implemented */

#define TCG_TARGET_HAS_ext8u_i32        0 /* andi */

#define TCG_TARGET_HAS_ext16u_i32       0



/* optional instructions */

#define TCG_TARGET_HAS_div_i32          1

#define TCG_TARGET_HAS_rot_i32          0

#define TCG_TARGET_HAS_ext8s_i32        1

#define TCG_TARGET_HAS_ext16s_i32       1

#define TCG_TARGET_HAS_ext8u_i32        0

#define TCG_TARGET_HAS_ext16u_i32       0

#define TCG_TARGET_HAS_bswap16_i32      0

#define TCG_TARGET_HAS_bswap32_i32      0

#define TCG_TARGET_HAS_not_i32          1