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| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-21 11:07:29 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-22 15:10:21 +0200 |
| commit | 7ef55fc91926f518f905692db19ed0b4a8018989 (patch) | |
| tree | 3a2d27d3deeeb426859bccbd2173afd779a62add | |
| parent | fba3161fd289f1282f5afce5f91c32e2575e5e8e (diff) | |
tcg/optimize: add constant folding for deposit
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | tcg/optimize.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index c8ae50bc91..35532a1e03 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -668,6 +668,26 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, } args += 3; break; + CASE_OP_32_64(deposit): + if (temps[args[1]].state == TCG_TEMP_CONST + && temps[args[2]].state == TCG_TEMP_CONST) { + gen_opc_buf[op_index] = op_to_movi(op); + tmp = ((1ull << args[4]) - 1); + tmp = (temps[args[1]].val & ~(tmp << args[3])) + | ((temps[args[2]].val & tmp) << args[3]); + tcg_opt_gen_movi(gen_args, args[0], tmp); + gen_args += 2; + } else { + reset_temp(args[0]); + gen_args[0] = args[0]; + gen_args[1] = args[1]; + gen_args[2] = args[2]; + gen_args[3] = args[3]; + gen_args[4] = args[4]; + gen_args += 5; + } + args += 5; + break; CASE_OP_32_64(setcond): tmp = do_constant_folding_cond(op, args[1], args[2], args[3]); if (tmp != 2) { |