It was never implemented, thus even for EV6 and EV7 the bit
is read-as-zero, writes-ignored.
Reported-by: Al Viro <v...@zeniv.linux.org.uk>
Signed-off-by: Richard Henderson <r...@twiddle.net>
---
target-alpha/cpu.h | 1 -
target-alpha/helper.c | 8 +++-----
2 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/target-alpha/cpu.h b/target-alpha/cpu.h
index d9b861f..d3a6a4e 100644
--- a/target-alpha/cpu.h
+++ b/target-alpha/cpu.h
@@ -246,7 +246,6 @@ struct CPUAlphaState {
uint8_t fpcr_exc_mask;
uint8_t fpcr_dyn_round;
uint8_t fpcr_flush_to_zero;
- uint8_t fpcr_dnod;
uint8_t fpcr_undz;
/* The Internal Processor Registers. Some of these we assume always
diff --git a/target-alpha/helper.c b/target-alpha/helper.c
index 26d5188..d0b4964 100644
--- a/target-alpha/helper.c
+++ b/target-alpha/helper.c
@@ -88,19 +88,17 @@ uint64_t cpu_alpha_load_fpcr (CPUAlphaState *env)
if (env->fp_status.flush_inputs_to_zero) {
r |= FPCR_DNZ;
}
- if (env->fpcr_dnod) {
- r |= FPCR_DNOD;
- }
if (env->fpcr_undz) {
r |= FPCR_UNDZ;
}
+ /* DNOD was never implemented in hardware. */
return r;
}
void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t val)
{
- uint8_t t;
+ int t;
t = 0;
if (val & FPCR_INV) {
@@ -157,11 +155,11 @@ void cpu_alpha_store_fpcr (CPUAlphaState *env, uint64_t
val)
}
env->fpcr_dyn_round = t;
- env->fpcr_dnod = (val & FPCR_DNOD) != 0;
env->fpcr_undz = (val & FPCR_UNDZ) != 0;
env->fp_status.flush_inputs_to_zero = (val & FPCR_DNZ) != 0;
env->fpcr_flush_to_zero
= (val & (FPCR_UNDZ | FPCR_UNFD)) == (FPCR_UNDZ | FPCR_UNFD);
+ /* DNOD was never implemented in hardware. */
}
uint64_t helper_load_fpcr(CPUAlphaState *env)
--
1.9.3
