Commit 8642088a authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg-ia64: Use ADDS for small addition 



Avoids a wasted cycle loading up small constants.

Simplify the code assuming the tcg optimizer is going to work
and don't expect the first operand of the add to be constant.

Acked-by: default avatarAurelien Jarno <aurelien@aurel32.net>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 3c289cba

tcg/ia64/tcg-target.c

+16 −4
Original line number Diff line number Diff line
@@ -1067,6 +1067,19 @@ static void tcg_out_alu(TCGContext *s, uint64_t opc_a1, TCGReg ret, TCGArg arg1, 
                   tcg_opc_a1(TCG_REG_P0, opc_a1, ret, arg1, arg2));

}



static inline void tcg_out_add(TCGContext *s, TCGReg ret, TCGReg arg1,

                               TCGArg arg2, int const_arg2)

{

    if (const_arg2 && arg2 == sextract64(arg2, 0, 14)) {

        tcg_out_bundle(s, mmI,

                       INSN_NOP_M,

                       INSN_NOP_M,

                       tcg_opc_a4(TCG_REG_P0, OPC_ADDS_A4, ret, arg2, arg1));

    } else {

        tcg_out_alu(s, OPC_ADD_A1, ret, arg1, 0, arg2, const_arg2);

    }

}



static inline void tcg_out_eqv(TCGContext *s, TCGArg ret,

                               TCGArg arg1, int const_arg1,

                               TCGArg arg2, int const_arg2)
@@ -2068,8 +2081,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, 


    case INDEX_op_add_i32:

    case INDEX_op_add_i64:

        tcg_out_alu(s, OPC_ADD_A1, args[0], args[1], const_args[1],

                    args[2], const_args[2]);

        tcg_out_add(s, args[0], args[1], args[2], const_args[2]);

        break;

    case INDEX_op_sub_i32:

    case INDEX_op_sub_i64:
@@ -2275,7 +2287,7 @@ static const TCGTargetOpDef ia64_op_defs[] = { 
    { INDEX_op_st16_i32, { "rZ", "r" } },

    { INDEX_op_st_i32, { "rZ", "r" } },



    { INDEX_op_add_i32, { "r", "rI", "rI" } },

    { INDEX_op_add_i32, { "r", "rZ", "rI" } },

    { INDEX_op_sub_i32, { "r", "rI", "rI" } },



    { INDEX_op_and_i32, { "r", "rI", "rI" } },
@@ -2322,7 +2334,7 @@ static const TCGTargetOpDef ia64_op_defs[] = { 
    { INDEX_op_st32_i64, { "rZ", "r" } },

    { INDEX_op_st_i64, { "rZ", "r" } },



    { INDEX_op_add_i64, { "r", "rI", "rI" } },

    { INDEX_op_add_i64, { "r", "rZ", "rI" } },

    { INDEX_op_sub_i64, { "r", "rI", "rI" } },



    { INDEX_op_and_i64, { "r", "rI", "rI" } },