diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-03-11 22:41:47 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2013-07-09 07:14:09 -0700 |
| commit | ca675f46e695bd49a1c21a5e82c6b8c77ee12edf (patch) | |
| tree | 5c23738b2e2462a15e55fb5a963dd44a0df82eb6 /tcg/tcg-op.h | |
| parent | cc7772bdbe4cb0ff1bac538bda86260b871d8b1a (diff) | |
| download | qemu-ca675f46e695bd49a1c21a5e82c6b8c77ee12edf.tar.gz | |
tcg: Split rem requirement from div requirement
There are several hosts with only a "div" insn. Remainder is computed
manually from the quotient and inputs. We can do this generically.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/tcg-op.h')
| -rw-r--r-- | tcg/tcg-op.h | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index 94f6043786..364964d8d4 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -731,8 +731,14 @@ static inline void tcg_gen_div_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2) static inline void tcg_gen_rem_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2) { - if (TCG_TARGET_HAS_div_i32) { + if (TCG_TARGET_HAS_rem_i32) { tcg_gen_op3_i32(INDEX_op_rem_i32, ret, arg1, arg2); + } else if (TCG_TARGET_HAS_div_i32) { + TCGv_i32 t0 = tcg_temp_new_i32(); + tcg_gen_op3_i32(INDEX_op_div_i32, t0, arg1, arg2); + tcg_gen_mul_i32(t0, t0, arg2); + tcg_gen_sub_i32(ret, arg1, t0); + tcg_temp_free_i32(t0); } else if (TCG_TARGET_HAS_div2_i32) { TCGv_i32 t0 = tcg_temp_new_i32(); tcg_gen_sari_i32(t0, arg1, 31); @@ -769,8 +775,14 @@ static inline void tcg_gen_divu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2) static inline void tcg_gen_remu_i32(TCGv_i32 ret, TCGv_i32 arg1, TCGv_i32 arg2) { - if (TCG_TARGET_HAS_div_i32) { + if (TCG_TARGET_HAS_rem_i32) { tcg_gen_op3_i32(INDEX_op_remu_i32, ret, arg1, arg2); + } else if (TCG_TARGET_HAS_div_i32) { + TCGv_i32 t0 = tcg_temp_new_i32(); + tcg_gen_op3_i32(INDEX_op_divu_i32, t0, arg1, arg2); + tcg_gen_mul_i32(t0, t0, arg2); + tcg_gen_sub_i32(ret, arg1, t0); + tcg_temp_free_i32(t0); } else if (TCG_TARGET_HAS_div2_i32) { TCGv_i32 t0 = tcg_temp_new_i32(); tcg_gen_movi_i32(t0, 0); @@ -1361,8 +1373,14 @@ static inline void tcg_gen_div_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) static inline void tcg_gen_rem_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) { - if (TCG_TARGET_HAS_div_i64) { + if (TCG_TARGET_HAS_rem_i64) { tcg_gen_op3_i64(INDEX_op_rem_i64, ret, arg1, arg2); + } else if (TCG_TARGET_HAS_div_i64) { + TCGv_i64 t0 = tcg_temp_new_i64(); + tcg_gen_op3_i64(INDEX_op_div_i64, t0, arg1, arg2); + tcg_gen_mul_i64(t0, t0, arg2); + tcg_gen_sub_i64(ret, arg1, t0); + tcg_temp_free_i64(t0); } else if (TCG_TARGET_HAS_div2_i64) { TCGv_i64 t0 = tcg_temp_new_i64(); tcg_gen_sari_i64(t0, arg1, 63); @@ -1399,8 +1417,14 @@ static inline void tcg_gen_divu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) static inline void tcg_gen_remu_i64(TCGv_i64 ret, TCGv_i64 arg1, TCGv_i64 arg2) { - if (TCG_TARGET_HAS_div_i64) { + if (TCG_TARGET_HAS_rem_i64) { tcg_gen_op3_i64(INDEX_op_remu_i64, ret, arg1, arg2); + } else if (TCG_TARGET_HAS_div_i64) { + TCGv_i64 t0 = tcg_temp_new_i64(); + tcg_gen_op3_i64(INDEX_op_divu_i64, t0, arg1, arg2); + tcg_gen_mul_i64(t0, t0, arg2); + tcg_gen_sub_i64(ret, arg1, t0); + tcg_temp_free_i64(t0); } else if (TCG_TARGET_HAS_div2_i64) { TCGv_i64 t0 = tcg_temp_new_i64(); tcg_gen_movi_i64(t0, 0); |