From 09d9487fbb5c17226762e73c2b7d84170f5bd092 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Tue, 7 Dec 2010 15:37:34 +0000 Subject: ARM: Return correct result for float-to-integer conversion of NaN The ARM architecture mandates that converting a NaN value to integer gives zero (if Invalid Operation FP exceptions are not being trapped). This isn't the behaviour of the SoftFloat library, so NaNs must be special-cased. Signed-off-by: Peter Maydell Reviewed-by: Nathan Froyd --- target-arm/helper.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'target-arm') diff --git a/target-arm/helper.c b/target-arm/helper.c index 2a1f44860b..6d2a8f2ad9 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2463,41 +2463,65 @@ float64 VFP_HELPER(sito, d)(float32 x, CPUState *env) /* Float to integer conversion. */ float32 VFP_HELPER(toui, s)(float32 x, CPUState *env) { + if (float32_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float32_to_uint32(x, &env->vfp.fp_status)); } float32 VFP_HELPER(toui, d)(float64 x, CPUState *env) { + if (float64_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float64_to_uint32(x, &env->vfp.fp_status)); } float32 VFP_HELPER(tosi, s)(float32 x, CPUState *env) { + if (float32_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float32_to_int32(x, &env->vfp.fp_status)); } float32 VFP_HELPER(tosi, d)(float64 x, CPUState *env) { + if (float64_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float64_to_int32(x, &env->vfp.fp_status)); } float32 VFP_HELPER(touiz, s)(float32 x, CPUState *env) { + if (float32_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float32_to_uint32_round_to_zero(x, &env->vfp.fp_status)); } float32 VFP_HELPER(touiz, d)(float64 x, CPUState *env) { + if (float64_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float64_to_uint32_round_to_zero(x, &env->vfp.fp_status)); } float32 VFP_HELPER(tosiz, s)(float32 x, CPUState *env) { + if (float32_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float32_to_int32_round_to_zero(x, &env->vfp.fp_status)); } float32 VFP_HELPER(tosiz, d)(float64 x, CPUState *env) { + if (float64_is_any_nan(x)) { + return float32_zero; + } return vfp_itos(float64_to_int32_round_to_zero(x, &env->vfp.fp_status)); } @@ -2524,6 +2548,9 @@ ftype VFP_HELPER(name##to, p)(ftype x, uint32_t shift, CPUState *env) \ ftype VFP_HELPER(to##name, p)(ftype x, uint32_t shift, CPUState *env) \ { \ ftype tmp; \ + if (ftype##_is_any_nan(x)) { \ + return ftype##_zero; \ + } \ tmp = ftype##_scalbn(x, shift, &env->vfp.fp_status); \ return vfp_ito##p((itype)ftype##_to_##sign##int32_round_to_zero(tmp, \ &env->vfp.fp_status)); \ -- cgit v1.2.1