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[25/30] tcg/loongarch: Implement exit_tb/goto_tb

Message ID 20210920080451.408655-26-git@xen0n.name (mailing list archive)
State New, archived
Headers show
Series 64-bit LoongArch port of QEMU TCG | expand

Commit Message

WANG Xuerui Sept. 20, 2021, 8:04 a.m. UTC 
Signed-off-by: WANG Xuerui <git@xen0n.name>
---
 tcg/loongarch/tcg-target.c.inc | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

Comments

Richard Henderson Sept. 20, 2021, 5:16 p.m. UTC | #1 
On 9/20/21 1:04 AM, WANG Xuerui wrote:
> Signed-off-by: WANG Xuerui <git@xen0n.name>
> ---
>   tcg/loongarch/tcg-target.c.inc | 19 +++++++++++++++++++
>   1 file changed, 19 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/tcg/loongarch/tcg-target.c.inc b/tcg/loongarch/tcg-target.c.inc
index 10df007087..585bf8dba0 100644
--- a/tcg/loongarch/tcg-target.c.inc
+++ b/tcg/loongarch/tcg-target.c.inc
@@ -899,6 +899,25 @@  static void tcg_out_op(TCGContext *s, TCGOpcode opc,
     int c2 = const_args[2];
 
     switch (opc) {
+    case INDEX_op_exit_tb:
+        /* Reuse the zeroing that exists for goto_ptr.  */
+        if (a0 == 0) {
+            tcg_out_call_int(s, tcg_code_gen_epilogue, true);
+        } else {
+            tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0);
+            tcg_out_call_int(s, tb_ret_addr, true);
+        }
+        break;
+
+    case INDEX_op_goto_tb:
+        assert(s->tb_jmp_insn_offset == 0);
+        /* indirect jump method */
+        tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
+                   (uintptr_t)(s->tb_jmp_target_addr + a0));
+        tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_TMP0, 0);
+        set_jmp_reset_offset(s, a0);
+        break;
+
     case INDEX_op_mb:
         tcg_out_mb(s, a0);
         break;