On m68k, our 'snan' module actually return quiet, not signalling, 'long double' NaNs. This patch fixes it.
2024-04-18 Bruno Haible <[email protected]> snan: Add support for m68k. * lib/snan.h (construct_memory_SNaNl): Handle m68k specially. diff --git a/lib/snan.h b/lib/snan.h index c7312e259f..caee37b515 100644 --- a/lib/snan.h +++ b/lib/snan.h @@ -230,6 +230,11 @@ construct_memory_SNaNl (long double quiet_value) m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < HNWORDS / 2 ? 1 : - 1)] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 2); #endif + #elif (defined __m68k__ && LDBL_MANT_DIG == 64) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE + /* In this representation, there is a 16-bits gap between the exponent and + the mantissa, and the leading 1 of the mantissa is explicitly stored. */ + m.word[LDBL_EXPBIT0_WORD + 1] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 2); #else /* In this representation, the leading 1 of the mantissa is implicit. */ #if LDBL_EXPBIT0_BIT > 0
