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target-xtensa: implement JX/RET0/CALLX

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Group SNM0 (indirect jumps and calls).

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Max Filippov 2011-09-06 03:55:32 +04:00 committed by Blue Swirl
parent bd57fb91ae
commit 5da4a6a8c5
1 changed files with 43 additions and 0 deletions
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43
target-xtensa/translate.c
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@ -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*/