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target/s390x: improve 24-bit and 31-bit lengths read/write 

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-17-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2017-06-01 00:01:15 +02:00 committed by Richard Henderson
parent a65047afe5
commit 29a58fd85f
1 changed files with 33 additions and 14 deletions
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47
target/s390x/mem_helper.c
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@ -407,6 +407,31 @@ static inline void set_address(CPUS390XState *env, int reg, uint64_t address)
}
}
static inline uint64_t wrap_length(CPUS390XState *env, uint64_t length)
{
if (!(env->psw.mask & PSW_MASK_64)) {
/* 24-Bit and 31-Bit mode */
length &= 0x7fffffff;
}
return length;
}
static inline uint64_t get_length(CPUS390XState *env, int reg)
{
return wrap_length(env, env->regs[reg]);
}
static inline void set_length(CPUS390XState *env, int reg, uint64_t length)
{
if (env->psw.mask & PSW_MASK_64) {
/* 64-Bit mode */
env->regs[reg] = length;
} else {
/* 24-Bit and 31-Bit mode */
env->regs[reg] = deposit64(env->regs[reg], 0, 32, length);
}
}
/* search string (c is byte to search, r2 is string, r1 end of string) */
uint64_t HELPER(srst)(CPUS390XState *env, uint64_t r0, uint64_t end,
uint64_t str)
@ -598,19 +623,14 @@ uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
uint32_t r3)
{
uintptr_t ra = GETPC();
uint64_t destlen = env->regs[r1 + 1];
uint64_t destlen = get_length(env, r1 + 1);
uint64_t dest = get_address(env, r1);
uint64_t srclen = env->regs[r3 + 1];
uint64_t srclen = get_length(env, r3 + 1);
uint64_t src = get_address(env, r3);
uint8_t pad = a2 & 0xff;
uint8_t v;
uint32_t cc;
if (!(env->psw.mask & PSW_MASK_64)) {
destlen = (uint32_t)destlen;
srclen = (uint32_t)srclen;
}
if (destlen == srclen) {
cc = 0;
} else if (destlen < srclen) {
@ -632,10 +652,9 @@ uint32_t HELPER(mvcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
cpu_stb_data_ra(env, dest, pad, ra);
}
env->regs[r1 + 1] = destlen;
set_length(env, r1 + 1 , destlen);
/* can't use srclen here, we trunc'ed it */
/* FIXME: 31-bit mode! */
env->regs[r3 + 1] -= src - env->regs[r3];
set_length(env, r3 + 1, env->regs[r3 + 1] - src - env->regs[r3]);
set_address(env, r1, dest);
set_address(env, r3, src);
@ -647,9 +666,9 @@ uint32_t HELPER(clcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
uint32_t r3)
{
uintptr_t ra = GETPC();
uint64_t destlen = env->regs[r1 + 1];
uint64_t destlen = get_length(env, r1 + 1);
uint64_t dest = get_address(env, r1);
uint64_t srclen = env->regs[r3 + 1];
uint64_t srclen = get_length(env, r3 + 1);
uint64_t src = get_address(env, r3);
uint8_t pad = a2 & 0xff;
uint32_t cc = 0;
@ -671,9 +690,9 @@ uint32_t HELPER(clcle)(CPUS390XState *env, uint32_t r1, uint64_t a2,
}
}
env->regs[r1 + 1] = destlen;
set_length(env, r1 + 1, destlen);
/* can't use srclen here, we trunc'ed it */
env->regs[r3 + 1] -= src - env->regs[r3];
set_length(env, r3 + 1, env->regs[r3 + 1] - src - env->regs[r3]);
set_address(env, r1, dest);
set_address(env, r3, src);