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Use dynamical computation for condition codes

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Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2009-05-10 07:19:11 +00:00
parent bc24a225af
commit 8393617c1a
5 changed files with 196 additions and 24 deletions
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61
target-sparc/op_helper.c
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@ -746,6 +746,67 @@ GEN_FCMP(fcmped, float64, DT0, DT1, 0, 1);
GEN_FCMP(fcmpq, float128, QT0, QT1, 0, 0);
GEN_FCMP(fcmpeq, float128, QT0, QT1, 0, 1);
static uint32_t compute_all_flags(void)
{
return env->psr & PSR_ICC;
}
static uint32_t compute_C_flags(void)
{
return env->psr & PSR_CARRY;
}
#ifdef TARGET_SPARC64
static uint32_t compute_all_flags_xcc(void)
{
return env->xcc & PSR_ICC;
}
static uint32_t compute_C_flags_xcc(void)
{
return env->xcc & PSR_CARRY;
}
#endif
typedef struct CCTable {
uint32_t (*compute_all)(void); /* return all the flags */
uint32_t (*compute_c)(void); /* return the C flag */
} CCTable;
static const CCTable icc_table[CC_OP_NB] = {
/* CC_OP_DYNAMIC should never happen */
[CC_OP_FLAGS] = { compute_all_flags, compute_C_flags },
};
#ifdef TARGET_SPARC64
static const CCTable xcc_table[CC_OP_NB] = {
/* CC_OP_DYNAMIC should never happen */
[CC_OP_FLAGS] = { compute_all_flags_xcc, compute_C_flags_xcc },
};
#endif
void helper_compute_psr(void)
{
uint32_t new_psr;
new_psr = icc_table[CC_OP].compute_all();
env->psr = new_psr;
#ifdef TARGET_SPARC64
new_psr = xcc_table[CC_OP].compute_all();
env->xcc = new_psr;
#endif
CC_OP = CC_OP_FLAGS;
}
uint32_t helper_compute_C_icc(void)
{
uint32_t ret;
ret = icc_table[CC_OP].compute_c() >> PSR_CARRY_SHIFT;
return ret;
}
#ifdef TARGET_SPARC64
GEN_FCMPS(fcmps_fcc1, float32, 22, 0);
GEN_FCMP(fcmpd_fcc1, float64, DT0, DT1, 22, 0);