Commit 6f3bb33e authored by Richard Henderson's avatar Richard Henderson Committed by Aurelien Jarno
Browse files

tcg: Emit XORI as NOT for appropriate constants



Note that xori_i64 failed to perform even the minimal
optimizations promised by the README.
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
parent d81ada7f
......@@ -582,9 +582,12 @@ static inline void tcg_gen_xor_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2)
static inline void tcg_gen_xori_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
{
/* some cases can be optimized here */
/* Some cases can be optimized here. */
if (arg2 == 0) {
tcg_gen_mov_i32(ret, arg1);
} else if (arg2 == -1 && TCG_TARGET_HAS_not_i32) {
/* Don't recurse with tcg_gen_not_i32. */
tcg_gen_op2_i32(INDEX_op_not_i32, ret, arg1);
} else {
TCGv_i32 t0 = tcg_const_i32(arg2);
tcg_gen_xor_i32(ret, arg1, t0);
......@@ -1206,9 +1209,17 @@ static inline void tcg_gen_xor_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
static inline void tcg_gen_xori_i64(TCGv_i64 ret, TCGv_i64 arg1, int64_t arg2)
{
TCGv_i64 t0 = tcg_const_i64(arg2);
tcg_gen_xor_i64(ret, arg1, t0);
tcg_temp_free_i64(t0);
/* Some cases can be optimized here. */
if (arg2 == 0) {
tcg_gen_mov_i64(ret, arg1);
} else if (arg2 == -1 && TCG_TARGET_HAS_not_i64) {
/* Don't recurse with tcg_gen_not_i64. */
tcg_gen_op2_i64(INDEX_op_not_i64, ret, arg1);
} else {
TCGv_i64 t0 = tcg_const_i64(arg2);
tcg_gen_xor_i64(ret, arg1, t0);
tcg_temp_free_i64(t0);
}
}
static inline void tcg_gen_shl_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2)
......
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment