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authorAurelien Jarno <aurelien@aurel32.net>2012-09-21 11:07:29 +0200
committerAurelien Jarno <aurelien@aurel32.net>2012-09-22 15:10:21 +0200
commit7ef55fc91926f518f905692db19ed0b4a8018989 (patch)
tree3a2d27d3deeeb426859bccbd2173afd779a62add
parentfba3161fd289f1282f5afce5f91c32e2575e5e8e (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.c20
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) {