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| author | Kirill Batuzov <batuzovk@ispras.ru> | 2011-07-07 16:37:17 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-07-30 10:51:30 +0000 |
| commit | a640f03178c22355a158fa9378e4f8bfa4f517a6 (patch) | |
| tree | 7a46ad7d95737ad9bcf389224e4b45ef21846107 /tcg | |
| parent | 55c0975c5b358e948b9ae7bd7b07eff92508e756 (diff) | |
| download | qemu-a640f03178c22355a158fa9378e4f8bfa4f517a6.zip qemu-a640f03178c22355a158fa9378e4f8bfa4f517a6.tar.gz qemu-a640f03178c22355a158fa9378e4f8bfa4f517a6.tar.bz2 | |
Do constant folding for unary operations.
Perform constant folding for NOT and EXT{8,16,32}{S,U} operations.
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/optimize.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index a1bb287..a324e98 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -107,6 +107,11 @@ static int op_bits(int op) case INDEX_op_sar_i32: case INDEX_op_rotl_i32: case INDEX_op_rotr_i32: + case INDEX_op_not_i32: + case INDEX_op_ext8s_i32: + case INDEX_op_ext16s_i32: + case INDEX_op_ext8u_i32: + case INDEX_op_ext16u_i32: return 32; #if TCG_TARGET_REG_BITS == 64 case INDEX_op_mov_i64: @@ -121,6 +126,13 @@ static int op_bits(int op) case INDEX_op_sar_i64: case INDEX_op_rotl_i64: case INDEX_op_rotr_i64: + case INDEX_op_not_i64: + case INDEX_op_ext8s_i64: + case INDEX_op_ext16s_i64: + case INDEX_op_ext32s_i64: + case INDEX_op_ext8u_i64: + case INDEX_op_ext16u_i64: + case INDEX_op_ext32u_i64: return 64; #endif default: @@ -267,6 +279,29 @@ static TCGArg do_constant_folding_2(int op, TCGArg x, TCGArg y) return x; #endif + CASE_OP_32_64(not): + return ~x; + + CASE_OP_32_64(ext8s): + return (int8_t)x; + + CASE_OP_32_64(ext16s): + return (int16_t)x; + + CASE_OP_32_64(ext8u): + return (uint8_t)x; + + CASE_OP_32_64(ext16u): + return (uint16_t)x; + +#if TCG_TARGET_REG_BITS == 64 + case INDEX_op_ext32s_i64: + return (int32_t)x; + + case INDEX_op_ext32u_i64: + return (uint32_t)x; +#endif + default: fprintf(stderr, "Unrecognized operation %d in do_constant_folding.\n", op); @@ -424,6 +459,30 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, gen_args += 2; args += 2; break; + CASE_OP_32_64(not): + CASE_OP_32_64(ext8s): + CASE_OP_32_64(ext16s): + CASE_OP_32_64(ext8u): + CASE_OP_32_64(ext16u): +#if TCG_TARGET_REG_BITS == 64 + case INDEX_op_ext32s_i64: + case INDEX_op_ext32u_i64: +#endif + if (temps[args[1]].state == TCG_TEMP_CONST) { + gen_opc_buf[op_index] = op_to_movi(op); + tmp = do_constant_folding(op, temps[args[1]].val, 0); + tcg_opt_gen_movi(gen_args, args[0], tmp, nb_temps, nb_globals); + gen_args += 2; + args += 2; + break; + } else { + reset_temp(args[0], nb_temps, nb_globals); + gen_args[0] = args[0]; + gen_args[1] = args[1]; + gen_args += 2; + args += 2; + break; + } CASE_OP_32_64(add): CASE_OP_32_64(sub): CASE_OP_32_64(mul): |