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target/alpha: Use array for FPCR_DYN conversion

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This is a bit more straight-forward than using a switch statement.
No functional change.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190921043256.4575-2-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2019-09-20 21:32:50 -07:00 committed by Alex Bennée
parent eb13d1cf4a
commit ea937dedec
1 changed files with 8 additions and 16 deletions
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24
target/alpha/helper.c
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@ -36,6 +36,13 @@ uint64_t cpu_alpha_load_fpcr(CPUAlphaState *env)
void cpu_alpha_store_fpcr(CPUAlphaState *env, uint64_t val)
{
static const uint8_t rm_map[] = {
[FPCR_DYN_NORMAL >> FPCR_DYN_SHIFT] = float_round_nearest_even,
[FPCR_DYN_CHOPPED >> FPCR_DYN_SHIFT] = float_round_to_zero,
[FPCR_DYN_MINUS >> FPCR_DYN_SHIFT] = float_round_down,
[FPCR_DYN_PLUS >> FPCR_DYN_SHIFT] = float_round_up,
};
uint32_t fpcr = val >> 32;
uint32_t t = 0;
@ -48,22 +55,7 @@ void cpu_alpha_store_fpcr(CPUAlphaState *env, uint64_t val)
env->fpcr = fpcr;
env->fpcr_exc_enable = ~t & FPCR_STATUS_MASK;
switch (fpcr & FPCR_DYN_MASK) {
case FPCR_DYN_NORMAL:
default:
t = float_round_nearest_even;
break;
case FPCR_DYN_CHOPPED:
t = float_round_to_zero;
break;
case FPCR_DYN_MINUS:
t = float_round_down;
break;
case FPCR_DYN_PLUS:
t = float_round_up;
break;
}
env->fpcr_dyn_round = t;
env->fpcr_dyn_round = rm_map[(fpcr & FPCR_DYN_MASK) >> FPCR_DYN_SHIFT];
env->fpcr_flush_to_zero = (fpcr & FPCR_UNFD) && (fpcr & FPCR_UNDZ);
env->fp_status.flush_inputs_to_zero = (fpcr & FPCR_DNZ) != 0;