diff options
Diffstat (limited to 'tcg/tcg-op.c')
| -rw-r--r-- | tcg/tcg-op.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index 2b520c1..620e268 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -536,6 +536,20 @@ void tcg_gen_ctzi_i32(TCGv_i32 ret, TCGv_i32 arg1, uint32_t arg2) tcg_temp_free_i32(t); } +void tcg_gen_clrsb_i32(TCGv_i32 ret, TCGv_i32 arg) +{ + if (TCG_TARGET_HAS_clz_i32) { + TCGv_i32 t = tcg_temp_new_i32(); + tcg_gen_sari_i32(t, arg, 31); + tcg_gen_xor_i32(t, t, arg); + tcg_gen_clzi_i32(t, t, 32); + tcg_gen_subi_i32(ret, t, 1); + tcg_temp_free_i32(t); + } else { + gen_helper_clrsb_i32(ret, arg); + } +} + void tcg_gen_rotl_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2) { if (TCG_TARGET_HAS_rot_i32) { @@ -1846,6 +1860,20 @@ void tcg_gen_ctzi_i64(TCGv_i64 ret, TCGv_i64 arg1, uint64_t arg2) } } +void tcg_gen_clrsb_i64(TCGv_i64 ret, TCGv_i64 arg) +{ + if (TCG_TARGET_HAS_clz_i64 || TCG_TARGET_HAS_clz_i32) { + TCGv_i64 t = tcg_temp_new_i64(); + tcg_gen_sari_i64(t, arg, 63); + tcg_gen_xor_i64(t, t, arg); + tcg_gen_clzi_i64(t, t, 64); + tcg_gen_subi_i64(ret, t, 1); + tcg_temp_free_i64(t); + } else { + gen_helper_clrsb_i64(ret, arg); + } +} + void tcg_gen_rotl_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) { if (TCG_TARGET_HAS_rot_i64) { |