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target-alpha: Forget installed round mode after MT_FPCR 

When we use QUAL_RM_D, we copy fpcr_dyn_round to float_status.
When we install a new FPCR value, we update fpcr_dyn_round.
Reset the status of the cache so that we re-copy for the next
fp insn that requires dynamic rounding.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2014-06-28 10:25:36 -07:00
parent 3da653fa05
commit 9d5a626b2c
1 changed files with 5 additions and 0 deletions
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target-alpha/translate.c
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@ -2199,6 +2199,11 @@ static ExitStatus translate_one(DisasContext *ctx, uint32_t insn)
/* MT_FPCR */
va = load_fpr(ctx, ra);
gen_helper_store_fpcr(cpu_env, va);
if (ctx->tb_rm == QUAL_RM_D) {
/* Re-do the copy of the rounding mode to fp_status
the next time we use dynamic rounding. */
ctx->tb_rm = -1;
}
break;
case 0x025:
/* MF_FPCR */