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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2024-10-23 01:59:18 +0200 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2024-11-18 10:54:42 +0100 |
| commit | e1f1ccb8f0a476198ce8adff566db26b7143e975 (patch) | |
| tree | b29396322341dd2a2a54c338297f5bac4e80f4a1 /fpu/softfloat-specialize.c.inc | |
| parent | 80c80346ebd8a36b778cb634732b427862de7cb1 (diff) | |
| download | focaccia-qemu-e1f1ccb8f0a476198ce8adff566db26b7143e975.tar.gz focaccia-qemu-e1f1ccb8f0a476198ce8adff566db26b7143e975.zip | |
target/s390x: Fix the floating-point multiply-and-add NaN rules
Order the helper arguments to match the Principles of Operation. Implement the "Results: MULTIPLY AND ADD" table in pickNaNMulAdd(). Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-ID: <20241023000147.34035-2-iii@linux.ibm.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'fpu/softfloat-specialize.c.inc')
| -rw-r--r-- | fpu/softfloat-specialize.c.inc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc index b5a3208050..9bca03c4ae 100644 --- a/fpu/softfloat-specialize.c.inc +++ b/fpu/softfloat-specialize.c.inc @@ -597,6 +597,25 @@ static int pickNaNMulAdd(FloatClass a_cls, FloatClass b_cls, FloatClass c_cls, float_raise(float_flag_invalid | float_flag_invalid_imz, status); } return 3; /* default NaN */ +#elif defined(TARGET_S390X) + if (infzero) { + float_raise(float_flag_invalid | float_flag_invalid_imz, status); + return 3; + } + + if (is_snan(a_cls)) { + return 0; + } else if (is_snan(b_cls)) { + return 1; + } else if (is_snan(c_cls)) { + return 2; + } else if (is_qnan(a_cls)) { + return 0; + } else if (is_qnan(b_cls)) { + return 1; + } else { + return 2; + } #elif defined(TARGET_SPARC) /* For (inf,0,nan) return c. */ if (infzero) { |