diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-09-20 21:32:50 -0700 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2019-09-26 19:00:53 +0100 |
| commit | ea937dedecb63e64a01fdda2c79a0bcf2a383a33 (patch) | |
| tree | 2cd235f4d07c5c65098c6b15e1a62c1cfe977e35 /target/alpha | |
| parent | eb13d1cf4a0478fc29f80abfbac8209479325f35 (diff) | |
target/alpha: Use array for FPCR_DYN conversion
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>
Diffstat (limited to 'target/alpha')
| -rw-r--r-- | target/alpha/helper.c | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/target/alpha/helper.c b/target/alpha/helper.c index 19cda0a2db..6c1703682e 100644 --- a/target/alpha/helper.c +++ b/target/alpha/helper.c @@ -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; |