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author | Bernhard Schommer <bernhardschommer@gmail.com> | 2022-03-22 16:03:57 +0100 |
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committer | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2022-04-25 16:34:11 +0200 |
commit | 967c04de6c02bef349df579cddbfcac8cf262e6d (patch) | |
tree | 65be52a638e7f7ff559ea90a4111da0278b032bf /powerpc | |
parent | 9d3521b4db46773239a2c5f9f6970de826075508 (diff) | |
download | compcert-967c04de6c02bef349df579cddbfcac8cf262e6d.tar.gz compcert-967c04de6c02bef349df579cddbfcac8cf262e6d.zip |
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
Diffstat (limited to 'powerpc')
-rw-r--r-- | powerpc/Archi.v | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/powerpc/Archi.v b/powerpc/Archi.v index 28859051..9dede4c7 100644 --- a/powerpc/Archi.v +++ b/powerpc/Archi.v @@ -66,8 +66,11 @@ Definition fma_invalid_mul_is_nan := false. Definition float_of_single_preserves_sNaN := true. +Definition float_conversion_default_nan := false. + 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. |