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[v2,08/31] target-xtensa: implement JX/RET0/CALLX

Message ID 1311527469-12963-9-git-send-email-jcmvbkbc@gmail.com
State New
Headers show

Commit Message

Max Filippov July 24, 2011, 5:10 p.m. UTC 
Group SNM0 (indirect jumps and calls).

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 target-xtensa/translate.c |   43 +++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)
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Patch

diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index c6ebb3d..400c995 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -248,6 +248,49 @@  static void disas_xtensa_insn(DisasContext *dc)
 
                 switch (RRR_R) {
                 case 0: /*SNM0*/
+                    switch (CALLX_M) {
+                    case 0: /*ILL*/
+                        break;
+
+                    case 1: /*reserved*/
+                        break;
+
+                    case 2: /*JR*/
+                        switch (CALLX_N) {
+                        case 0: /*RET*/
+                        case 2: /*JX*/
+                            gen_jump(dc, cpu_R[CALLX_S]);
+                            break;
+
+                        case 1: /*RETWw*/
+                            HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
+                            break;
+
+                        case 3: /*reserved*/
+                            break;
+                        }
+                        break;
+
+                    case 3: /*CALLX*/
+                        switch (CALLX_N) {
+                        case 0: /*CALLX0*/
+                            {
+                                TCGv_i32 tmp = tcg_temp_new_i32();
+                                tcg_gen_mov_i32(tmp, cpu_R[CALLX_S]);
+                                tcg_gen_movi_i32(cpu_R[0], dc->next_pc);
+                                gen_jump(dc, tmp);
+                                tcg_temp_free(tmp);
+                            }
+                            break;
+
+                        case 1: /*CALLX4w*/
+                        case 2: /*CALLX8w*/
+                        case 3: /*CALLX12w*/
+                            HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
+                            break;
+                        }
+                        break;
+                    }
                     break;
 
                 case 1: /*MOVSPw*/