From 967c04de6c02bef349df579cddbfcac8cf262e6d Mon Sep 17 00:00:00 2001 From: Bernhard Schommer Date: Tue, 22 Mar 2022 16:03:57 +0100 Subject: Introduce float_conversion_default_nan parameter for float-float conversions For RISC-V we need to return the canonical NaN value if the argument of a float32->float64 or float64->float32 conversion is any NaN. This is in line with 11.3 from the RISC-V manual, the description of the conversion operations as well as what the spike ISA simulator and qemu do. Other platforms convert the NaN payload (by truncation or expansion) in float32->float64 and float64->float32 conversions. Fixes: #428 --- riscV/Archi.v | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'riscV') diff --git a/riscV/Archi.v b/riscV/Archi.v index 9e561ca8..e33c3e84 100644 --- a/riscV/Archi.v +++ b/riscV/Archi.v @@ -63,11 +63,14 @@ Definition fma_invalid_mul_is_nan := false. Definition float_of_single_preserves_sNaN := false. +Definition float_conversion_default_nan := true. + Global Opaque ptr64 big_endian splitlong default_nan_64 choose_nan_64 default_nan_32 choose_nan_32 fma_order fma_invalid_mul_is_nan - float_of_single_preserves_sNaN. + float_of_single_preserves_sNaN + float_conversion_default_nan. (** Whether to generate position-independent code or not *) -- cgit