From b872f0e0b954bb00a6a0717ba437bf8ce7d2ebac Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 11 Mar 2011 08:12:22 +0000 Subject: [PATCH] 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 Signed-off-by: Aurelien Jarno --- target-arm/neon_helper.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c index 2108664adc..9d54a75ef3 100644 --- a/target-arm/neon_helper.c +++ b/target-arm/neon_helper.c @@ -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)) -- 2.34.1