OpenE2K/qemu-e2k
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target: e2k: Clear registers in new allocated range of window.

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This commit is contained in:
Denis Drakhnia 2020-12-13 20:58:32 +02:00
parent 0df8b48268
commit 0c7383ce04
1 changed files with 19 additions and 1 deletions
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20
target/e2k/helper.c
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@ -165,7 +165,14 @@ static inline void do_call(CPUE2KState *env, int wbs, target_ulong pc_next)
void helper_setwd(CPUE2KState *env, uint32_t lts)
{
env->wd.size = extract32(lts, 5, 7) * 2;
int old_size = env->wd.size, size = extract32(lts, 5, 7) * 2;
if (size < env->wd.psize) {
helper_raise_exception(env, E2K_EXCP_ILLOPN);
return;
}
env->wd.size = size;
env->wd.fx = extract32(lts, 4, 1) == 0;
if (env->version >= 3) {
@ -175,6 +182,17 @@ void helper_setwd(CPUE2KState *env, uint32_t lts)
}
ps_spill(env, false, PS_FORCE_FX);
if (old_size < size) {
unsigned int i, offset;
offset = env->wd.base + old_size + E2K_NR_COUNT;
for (i = 0; i < size - old_size; i++) {
unsigned int idx = (offset + i) % E2K_NR_COUNT;
env->regs[idx] = 0;
env->tags[idx] = E2K_TAG_NON_NUMBER64;
}
}
}
uint64_t helper_prep_return(CPUE2KState *env, int ipd)