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target/sh4: fix FPU unorderered compare 

In case of unordered compare, the fcmp instructions should either
trigger and invalid exception (if enabled) or set T=0. The existing code
left it unchanged.

LP: https://bugs.launchpad.net/qemu/+bug/1701821
Reported-by: Bruno Haible <bruno@clisp.org>
Message-Id: <20170702202814.27793-3-aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2017-07-02 21:23:56 +02:00
parent 57f5c1b093
commit fea7d77d3e
1 changed files with 8 additions and 20 deletions
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28
target/sh4/op_helper.c
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@ -274,11 +274,8 @@ void helper_fcmp_eq_FT(CPUSH4State *env, float32 t0, float32 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
if (unlikely(relation == float_relation_unordered)) {
update_fpscr(env, GETPC());
} else {
env->sr_t = (relation == float_relation_equal);
}
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_equal);
}
void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
@ -287,11 +284,8 @@ void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
if (unlikely(relation == float_relation_unordered)) {
update_fpscr(env, GETPC());
} else {
env->sr_t = (relation == float_relation_equal);
}
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_equal);
}
void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
@ -300,11 +294,8 @@ void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
if (unlikely(relation == float_relation_unordered)) {
update_fpscr(env, GETPC());
} else {
env->sr_t = (relation == float_relation_greater);
}
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_greater);
}
void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
@ -313,11 +304,8 @@ void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
if (unlikely(relation == float_relation_unordered)) {
update_fpscr(env, GETPC());
} else {
env->sr_t = (relation == float_relation_greater);
}
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_greater);
}
float64 helper_fcnvsd_FT_DT(CPUSH4State *env, float32 t0)