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tcg-ia64: Use ADDS for small addition

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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: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2013-09-05 16:15:13 -04:00
parent 3c289cba9b
commit 8642088a3d
1 changed files with 16 additions and 4 deletions
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20
tcg/ia64/tcg-target.c
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@ -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" } },