jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
target-xtensa: Use clrsb helper
Signed-off-by: Richard Henderson <rth@twiddle.net>
+1
-10
+1
-10
target/xtensa/translate.c
+1
-10
target/xtensa/translate.c
···
1372
1372
case 14: /*NSAu*/
1373
1373
HAS_OPTION(XTENSA_OPTION_MISC_OP_NSA);
1374
1374
if (gen_window_check2(dc, RRR_S, RRR_T)) {
1375
-
TCGv_i32 t0 = tcg_temp_new_i32();
1376
-
1377
-
/* if (v & 0x80000000) v = ~v; */
1378
-
tcg_gen_sari_i32(t0, cpu_R[RRR_S], 31);
1379
-
tcg_gen_xor_i32(t0, t0, cpu_R[RRR_S]);
1380
-
1381
-
/* r = (v ? clz(v) : 32) - 1; */
1382
-
tcg_gen_clzi_i32(t0, t0, 32);
1383
-
tcg_gen_subi_i32(cpu_R[RRR_T], t0, 1);
1384
-
tcg_temp_free_i32(t0);
1375
+
tcg_gen_clrsb_i32(cpu_R[RRR_T], cpu_R[RRR_S]);
1385
1376
}
1386
1377
break;
1387
1378