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target-arm: Return right result for Neon comparison with NaNs 

Fix the helper functions implementing the Neon floating point comparison
ops (VCGE, VCGT, VCEQ, VACGT, VACGE) to return the right answer when
one of the values being compared is a NaN.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
master
Peter Maydell 2011-03-11 08:12:22 +00:00 committed by Aurelien Jarno
parent 51d852672c
commit c7498daea7
1 changed files with 18 additions and 10 deletions
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28
target-arm/neon_helper.c
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@ -1810,32 +1810,40 @@ uint32_t HELPER(neon_mul_f32)(uint32_t a, uint32_t b)
}
/* Floating point comparisons produce an integer result. */
#define NEON_VOP_FCMP(name, cmp) \
#define NEON_VOP_FCMP(name, ok) \
uint32_t HELPER(neon_##name)(uint32_t a, uint32_t b) \
{ \
if (float32_compare_quiet(make_float32(a), make_float32(b), NFS) cmp 0) { \
return ~0; \
} else { \
return 0; \
switch (float32_compare_quiet(make_float32(a), make_float32(b), NFS)) { \
ok return ~0; \
default: return 0; \
} \
}
NEON_VOP_FCMP(ceq_f32, ==)
NEON_VOP_FCMP(cge_f32, >=)
NEON_VOP_FCMP(cgt_f32, >)
NEON_VOP_FCMP(ceq_f32, case float_relation_equal:)
NEON_VOP_FCMP(cge_f32, case float_relation_equal: case float_relation_greater:)
NEON_VOP_FCMP(cgt_f32, case float_relation_greater:)
uint32_t HELPER(neon_acge_f32)(uint32_t a, uint32_t b)
{
float32 f0 = float32_abs(make_float32(a));
float32 f1 = float32_abs(make_float32(b));
return (float32_compare_quiet(f0, f1,NFS) >= 0) ? ~0 : 0;
switch (float32_compare_quiet(f0, f1, NFS)) {
case float_relation_equal:
case float_relation_greater:
return ~0;
default:
return 0;
}
}
uint32_t HELPER(neon_acgt_f32)(uint32_t a, uint32_t b)
{
float32 f0 = float32_abs(make_float32(a));
float32 f1 = float32_abs(make_float32(b));
return (float32_compare_quiet(f0, f1, NFS) > 0) ? ~0 : 0;
if (float32_compare_quiet(f0, f1, NFS) == float_relation_greater) {
return ~0;
}
return 0;
}
#define ELEM(V, N, SIZE) (((V) >> ((N) * (SIZE))) & ((1ull << (SIZE)) - 1))