From: Bruno Haible <bruno@clisp.org>
To: bug-gnulib@gnu.org
Subject: snan: Add support for m68k
Date: Fri, 19 Apr 2024 02:13:58 +0200 [thread overview]
Message-ID: <11078819.ZyKXxmohFO@nimes> (raw)
On m68k, our 'snan' module actually return quiet, not signalling, 'long double'
NaNs. This patch fixes it.
2024-04-18 Bruno Haible <bruno@clisp.org>
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
reply other threads:[~2024-04-19 0:14 UTC|newest]
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