david.venhoff/QEMU-Nyx-fork
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tcg: Fix fallback from muls2_i64 to mulu2_i64

Browse Source 
Brown Bag sez, don't put the fallback code into the wrong function.
Also, check for muluh_i64 and use tcg_gen_mulu2_i64 instead of raw ops.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-03-26 11:09:44 -07:00
parent f46fc4e6a9
commit 662deb908f
1 changed files with 18 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
tcg/tcg-op.h
View File

@ -2520,26 +2520,6 @@ static inline void tcg_gen_mulu2_i64(TCGv_i64 rl, TCGv_i64 rh,
tcg_gen_op3_i64(INDEX_op_muluh_i64, rh, arg1, arg2); tcg_gen_op3_i64(INDEX_op_muluh_i64, rh, arg1, arg2);
tcg_gen_mov_i64(rl, t); tcg_gen_mov_i64(rl, t);
tcg_temp_free_i64(t); tcg_temp_free_i64(t);
} 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 { } else {
TCGv_i64 t0 = tcg_temp_new_i64(); TCGv_i64 t0 = tcg_temp_new_i64();
int sizemask = 0; int sizemask = 0;
@ -2567,6 +2547,24 @@ static inline void tcg_gen_muls2_i64(TCGv_i64 rl, TCGv_i64 rh,
tcg_gen_op3_i64(INDEX_op_mulsh_i64, rh, arg1, arg2); tcg_gen_op3_i64(INDEX_op_mulsh_i64, rh, arg1, arg2);
tcg_gen_mov_i64(rl, t); tcg_gen_mov_i64(rl, t);
tcg_temp_free_i64(t); tcg_temp_free_i64(t);
} else if (TCG_TARGET_HAS_mulu2_i64 || TCG_TARGET_HAS_muluh_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_mulu2_i64(t0, t1, arg1, arg2);
/* 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 { } else {
TCGv_i64 t0 = tcg_temp_new_i64(); TCGv_i64 t0 = tcg_temp_new_i64();
int sizemask = 0; int sizemask = 0;