tci: Add implementation of rotl_i64, rotr_i64

It is used by qemu-ppc64 when running Debian's busybox-static.

Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Reviewed-by: NRichard Henderson <rth@twiddle.net>

tcg/tci/tcg-target.c

@@ -670,7 +670,6 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args,
     case INDEX_op_shl_i64:
     case INDEX_op_shr_i64:
     case INDEX_op_sar_i64:
-        /* TODO: Implementation of rotl_i64, rotr_i64 missing in tci.c. */
     case INDEX_op_rotl_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
     case INDEX_op_rotr_i64:     /* Optional (TCG_TARGET_HAS_rot_i64). */
         tcg_out_r(s, args[0]);

tci.c

@@ -952,8 +952,16 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
             break;
 #if TCG_TARGET_HAS_rot_i64
         case INDEX_op_rotl_i64:
+            t0 = *tb_ptr++;
+            t1 = tci_read_ri64(&tb_ptr);
+            t2 = tci_read_ri64(&tb_ptr);
+            tci_write_reg64(t0, (t1 << t2) | (t1 >> (64 - t2)));
+            break;
         case INDEX_op_rotr_i64:
-            TODO();
+            t0 = *tb_ptr++;
+            t1 = tci_read_ri64(&tb_ptr);
+            t2 = tci_read_ri64(&tb_ptr);
+            tci_write_reg64(t0, (t1 >> t2) | (t1 << (64 - t2)));
             break;
 #endif
 #if TCG_TARGET_HAS_deposit_i64