tcg: Implement muls2 with mulu2

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index dac3b4ed9f..d70b2eba33 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -2396,6 +2396,26 @@ static inline void tcg_gen_muls2_i32(TCGv_i32 rl, TCGv_i32 rh,
         tcg_gen_op4_i32(INDEX_op_muls2_i32, rl, rh, arg1, arg2);
         /* Allow the optimizer room to replace muls2 with two moves.  */
         tcg_gen_op0(INDEX_op_nop);
+    } else if (TCG_TARGET_REG_BITS == 32 && TCG_TARGET_HAS_mulu2_i32) {
+        TCGv_i32 t0 = tcg_temp_new_i32();
+        TCGv_i32 t1 = tcg_temp_new_i32();
+        TCGv_i32 t2 = tcg_temp_new_i32();
+        TCGv_i32 t3 = tcg_temp_new_i32();
+        tcg_gen_op4_i32(INDEX_op_mulu2_i32, t0, t1, arg1, arg2);
+        /* Allow the optimizer room to replace mulu2 with two moves.  */
+        tcg_gen_op0(INDEX_op_nop);
+        /* Adjust for negative inputs.  */
+        tcg_gen_sari_i32(t2, arg1, 31);
+        tcg_gen_sari_i32(t3, arg2, 31);
+        tcg_gen_and_i32(t2, t2, arg2);
+        tcg_gen_and_i32(t3, t3, arg1);
+        tcg_gen_sub_i32(rh, t1, t2);
+        tcg_gen_sub_i32(rh, rh, t3);
+        tcg_gen_mov_i32(rl, t0);
+        tcg_temp_free_i32(t0);
+        tcg_temp_free_i32(t1);
+        tcg_temp_free_i32(t2);
+        tcg_temp_free_i32(t3);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         TCGv_i64 t1 = tcg_temp_new_i64();
@@ -2455,6 +2475,26 @@ static inline void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh,
         tcg_gen_op4_i64(INDEX_op_mulu2_i64, rl, rh, arg1, arg2);
         /* Allow the optimizer room to replace mulu2 with two moves.  */
         tcg_gen_op0(INDEX_op_nop);
+    } else if (TCG_TARGET_HAS_mulu2_i64) {
+        TCGv_i64 t0 = tcg_temp_new_i64();
+        TCGv_i64 t1 = tcg_temp_new_i64();
+        TCGv_i64 t2 = tcg_temp_new_i64();
+        TCGv_i64 t3 = tcg_temp_new_i64();
+        tcg_gen_op4_i64(INDEX_op_mulu2_i64, t0, t1, arg1, arg2);
+        /* Allow the optimizer room to replace mulu2 with two moves.  */
+        tcg_gen_op0(INDEX_op_nop);
+        /* Adjust for negative inputs.  */
+        tcg_gen_sari_i64(t2, arg1, 63);
+        tcg_gen_sari_i64(t3, arg2, 63);
+        tcg_gen_and_i64(t2, t2, arg2);
+        tcg_gen_and_i64(t3, t3, arg1);
+        tcg_gen_sub_i64(rh, t1, t2);
+        tcg_gen_sub_i64(rh, rh, t3);
+        tcg_gen_mov_i64(rl, t0);
+        tcg_temp_free_i64(t0);
+        tcg_temp_free_i64(t1);
+        tcg_temp_free_i64(t2);
+        tcg_temp_free_i64(t3);
     } else {
         TCGv_i64 t0 = tcg_temp_new_i64();
         int sizemask = 0;