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qemu-e2k
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target: e2k: Add setwd helper.

This commit is contained in:
Denis Drakhnia 2020-11-26 22:02:34 +02:00 committed by Denis Drakhnia
parent 2ec66c49c5
commit 028d27ae4c
3 changed files with 34 additions and 19 deletions
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44
target/e2k/helper.c
View File

@ -16,7 +16,8 @@ static inline void reset_ctprs(CPUE2KState *env)
}
}
static inline void save_proc_chain_info(CPUE2KState *env, uint64_t buf[4])
static inline void save_proc_chain_info(CPUE2KState *env, uint64_t buf[4],
int wbs)
{
env->cr1.br = e2k_state_br(env);
env->cr1.wpsz = env->wd.psize / 2;
@ -25,10 +26,17 @@ static inline void save_proc_chain_info(CPUE2KState *env, uint64_t buf[4])
buf[1] = env->cr0_hi;
buf[2] = e2k_state_cr1_lo(env);
buf[3] = e2k_state_cr1_hi(env);
env->cr1.wfx = env->wd.fx;
env->cr1.wbs = wbs;
env->wd.base = (env->wd.base + wbs * 2) % WREGS_SIZE;
env->wd.psize = env->wd.size -= wbs * 2;
}
static inline void restore_proc_chain_info(CPUE2KState *env, uint64_t buf[4])
{
env->wd.fx = env->cr1.wfx;
e2k_state_cr1_hi_set(env, buf[3]);
e2k_state_cr1_lo_set(env, buf[2]);
env->cr0_hi = buf[1];
@ -47,11 +55,8 @@ static void pcs_push(CPUE2KState *env, int wbs)
return;
}
// save proc chain
save_proc_chain_info(env, buf);
save_proc_chain_info(env, buf, wbs);
memcpy(env->pcsp.base + env->pcsp.index, buf, 32);
env->cr1.wbs = wbs;
env->pcsp.index += 32;
}
@ -152,17 +157,11 @@ static void ps_pop_fx(CPUE2KState *env, unsigned int base, size_t len)
}
}
static inline void do_call(CPUE2KState *env, int call_wbs)
static inline void do_call(CPUE2KState *env, int wbs)
{
int call_wpsz = env->wd.size / 2 - call_wbs;
env->ip = env->nip;
pcs_push(env, call_wbs);
ps_push_nfx(env, env->wd.base, call_wbs * 2);
env->wd.base = (env->wd.base + call_wbs * 2) % WREGS_SIZE;
env->wd.size = env->wd.psize = call_wpsz * 2;
ps_push_nfx(env, env->wd.base, wbs * 2);
pcs_push(env, wbs);
reset_ctprs(env);
}
@ -341,3 +340,20 @@ uint64_t helper_getsp(CPUE2KState *env, uint64_t src2) {
return base;
}
void helper_setwd(CPUE2KState *env, uint32_t lts)
{
int wsz = extract32(lts, 5, 7);
bool nfx = extract32(lts, 4, 1);
env->wd.size = wsz * 2;
env->wd.fx = nfx == 0;
if (env->version >= 3) {
bool dbl = extract32(lts, 3, 1);
// TODO: set dbl
if (dbl != false) {
abort();
}
}
}

1
target/e2k/helper.h
View File

@ -8,3 +8,4 @@ DEF_HELPER_2(state_reg_get, i64, env, int)
DEF_HELPER_3(state_reg_set, void, env, int, i64)
DEF_HELPER_2(getsp, i64, env, i64) /* FIXME: return tl? */
DEF_HELPER_1(break_restore_state, void, env)
DEF_HELPER_2(setwd, void, env, i32)

8
target/e2k/translate/control.c
View File

@ -375,13 +375,11 @@ static void gen_cs1(DisasContext *dc)
if (! bundle->lts_present[0]) {
e2k_gen_exception(dc, E2K_EXCP_ILLOPC);
} else {
uint32_t lts0 = bundle->lts[0];
int wsz = GET_FIELD(lts0, 5, 7);
TCGv_i32 t0 = tcg_const_i32(lts0);
TCGv_i32 lts = tcg_const_i32(bundle->lts[0]);
tcg_gen_movi_i32(e2k_cs.wd_size, wsz * 2);
gen_helper_setwd(cpu_env, lts);
tcg_temp_free_i32(t0);
tcg_temp_free_i32(lts);
}
}