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target/i386: Set Float3NaNPropRule explicitly

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Set the Float3NaNPropRule explicitly for i386.  We had no
i386-specific behaviour in the old ifdef ladder, so we were using the
default "prefer a then b then c" fallback; this is actually the
correct per-the-spec handling for i386.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241202131347.498124-25-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2024-12-11 15:30:58 +00:00
parent 8e6915645e
commit 703990100a
1 changed files with 1 additions and 0 deletions
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target/i386/tcg/fpu_helper.c
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@ -180,6 +180,7 @@ void cpu_init_fp_statuses(CPUX86State *env)
* there are multiple input NaNs they are selected in the order a, b, c. * there are multiple input NaNs they are selected in the order a, b, c.
*/ */
set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->sse_status); set_float_infzeronan_rule(float_infzeronan_dnan_never, &env->sse_status);
set_float_3nan_prop_rule(float_3nan_prop_abc, &env->sse_status);
} }
static inline uint8_t save_exception_flags(CPUX86State *env) static inline uint8_t save_exception_flags(CPUX86State *env)