Commit 5d221582 authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-ppc64: Implement bswap16 and bswap32 



Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 313d91c7

tcg/ppc64/tcg-target.c

+43 −0
Original line number Diff line number Diff line
@@ -1676,6 +1676,44 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc, const TCGArg *args, 
                         const_args[2]);

        break;



    case INDEX_op_bswap16_i32:

    case INDEX_op_bswap16_i64:

        a0 = args[0], a1 = args[1];

        /* a1 = abcd */

        if (a0 != a1) {

            /* a0 = (a1 r<< 24) & 0xff # 000c */

            tcg_out_rlw(s, RLWINM, a0, a1, 24, 24, 31);

            /* a0 = (a0 & ~0xff00) | (a1 r<< 8) & 0xff00 # 00dc */

            tcg_out_rlw(s, RLWIMI, a0, a1, 8, 16, 23);

        } else {

            /* r0 = (a1 r<< 8) & 0xff00 # 00d0 */

            tcg_out_rlw(s, RLWINM, TCG_REG_R0, a1, 8, 16, 23);

            /* a0 = (a1 r<< 24) & 0xff # 000c */

            tcg_out_rlw(s, RLWINM, a0, a1, 24, 24, 31);

            /* a0 = a0 | r0 # 00dc */

            tcg_out32(s, OR | SAB(TCG_REG_R0, a0, a0));

        }

        break;



    case INDEX_op_bswap32_i32:

    case INDEX_op_bswap32_i64:

        /* Stolen from gcc's builtin_bswap32 */

        a1 = args[1];

        a0 = args[0] == a1 ? TCG_REG_R0 : args[0];



        /* a1 = args[1] # abcd */

        /* a0 = rotate_left (a1, 8) # bcda */

        tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31);

        /* a0 = (a0 & ~0xff000000) | ((a1 r<< 24) & 0xff000000) # dcda */

        tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7);

        /* a0 = (a0 & ~0x0000ff00) | ((a1 r<< 24) & 0x0000ff00) # dcba */

        tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23);



        if (a0 == TCG_REG_R0) {

            tcg_out_mov(s, TCG_TYPE_I64, args[0], a0);

        }

        break;



    default:

        tcg_dump_ops (s);

        tcg_abort ();
@@ -1781,6 +1819,11 @@ static const TCGTargetOpDef ppc_op_defs[] = { 
    { INDEX_op_setcond_i32, { "r", "r", "ri" } },

    { INDEX_op_setcond_i64, { "r", "r", "ri" } },



    { INDEX_op_bswap16_i32, { "r", "r" } },

    { INDEX_op_bswap16_i64, { "r", "r" } },

    { INDEX_op_bswap32_i32, { "r", "r" } },

    { INDEX_op_bswap32_i64, { "r", "r" } },



    { -1 },

};

tcg/ppc64/tcg-target.h

+4 −4
Original line number Diff line number Diff line
@@ -79,8 +79,8 @@ typedef enum { 
#define TCG_TARGET_HAS_rot_i32          1

#define TCG_TARGET_HAS_ext8s_i32        1

#define TCG_TARGET_HAS_ext16s_i32       1

#define TCG_TARGET_HAS_bswap16_i32      0

#define TCG_TARGET_HAS_bswap32_i32      0

#define TCG_TARGET_HAS_bswap16_i32      1

#define TCG_TARGET_HAS_bswap32_i32      1

#define TCG_TARGET_HAS_not_i32          1

#define TCG_TARGET_HAS_neg_i32          1

#define TCG_TARGET_HAS_andc_i32         0
@@ -100,8 +100,8 @@ typedef enum { 
#define TCG_TARGET_HAS_ext8s_i64        1

#define TCG_TARGET_HAS_ext16s_i64       1

#define TCG_TARGET_HAS_ext32s_i64       1

#define TCG_TARGET_HAS_bswap16_i64      0

#define TCG_TARGET_HAS_bswap32_i64      0

#define TCG_TARGET_HAS_bswap16_i64      1

#define TCG_TARGET_HAS_bswap32_i64      1

#define TCG_TARGET_HAS_bswap64_i64      0

#define TCG_TARGET_HAS_not_i64          1

#define TCG_TARGET_HAS_neg_i64          1