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s390x/tcg: MVCL: Zero out unused bits of address 

We have to zero out unused bits in 24 and 31-bit addressing mode.
Provide a new helper.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-09-03 14:44:31 +02:00
parent bed04a2b9c
commit d292671ade
1 changed files with 21 additions and 2 deletions
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23
target/s390x/mem_helper.c
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@ -469,6 +469,25 @@ static inline uint64_t get_address(CPUS390XState *env, int reg)
return wrap_address(env, env->regs[reg]);
}
/*
* Store the address to the given register, zeroing out unused leftmost
* bits in bit positions 32-63 (24-bit and 31-bit mode only).
*/
static inline void set_address_zero(CPUS390XState *env, int reg,
uint64_t address)
{
if (env->psw.mask & PSW_MASK_64) {
env->regs[reg] = address;
} else {
if (!(env->psw.mask & PSW_MASK_32)) {
address &= 0x00ffffff;
} else {
address &= 0x7fffffff;
}
env->regs[reg] = deposit64(env->regs[reg], 0, 32, address);
}
}
static inline void set_address(CPUS390XState *env, int reg, uint64_t address)
{
if (env->psw.mask & PSW_MASK_64) {
@ -772,8 +791,8 @@ uint32_t HELPER(mvcl)(CPUS390XState *env, uint32_t r1, uint32_t r2)
env->regs[r1 + 1] = deposit64(env->regs[r1 + 1], 0, 24, destlen);
env->regs[r2 + 1] = deposit64(env->regs[r2 + 1], 0, 24, srclen);
set_address(env, r1, dest);
set_address(env, r2, src);
set_address_zero(env, r1, dest);
set_address_zero(env, r2, src);
return cc;
}