From ca675f46e695bd49a1c21a5e82c6b8c77ee12edf Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 11 Mar 2013 22:41:47 -0700 Subject: 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 Signed-off-by: Richard Henderson --- tcg/tcg-op.h | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-) (limited to 'tcg/tcg-op.h') 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); -- cgit v1.2.1