diff options
Diffstat (limited to 'debian/patches/debian/mips-ieee754-relaxed.patch')
| -rw-r--r-- | debian/patches/debian/mips-ieee754-relaxed.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/debian/patches/debian/mips-ieee754-relaxed.patch b/debian/patches/debian/mips-ieee754-relaxed.patch new file mode 100644 index 000000000..20dff251c --- /dev/null +++ b/debian/patches/debian/mips-ieee754-relaxed.patch @@ -0,0 +1,32 @@ +From: YunQiang Su <syq@debian.org> +Date: Mon 16 Nov 2020 09:11:00 +0800 +Subject: Use RELAXED ieee754 mode for Loongson-3 as 3A 4000 is 2008-only +Forwarded: not-needed + +There are 2 mode of value of IEEE NaN hardcoded by CPU. +Currently, our mipsel/mips64el port is in so-called lagacy mode. +Loongson 3A 4000 is set as the so-called 2008 mode. + +To make Debian workable on Loongson 3A 4000, we need set the kerenl in +RELAXED mode. + +https://web.archive.org/web/20180830093617/https://dmz-portal.mips.com/wiki/MIPS_ABI_-_NaN_Interlinking + +diff --git a/arch/mips/kernel/fpu-probe.c b/arch/mips/kernel/fpu-probe.c +index e689d6a83..667226f94 100644 +--- a/arch/mips/kernel/fpu-probe.c ++++ b/arch/mips/kernel/fpu-probe.c +@@ -144,7 +144,12 @@ static void cpu_set_fpu_2008(struct cpuinfo_mips *c) + * IEEE 754 conformance mode to use. Affects the NaN encoding and the + * ABS.fmt/NEG.fmt execution mode. + */ +-static enum { STRICT, LEGACY, STD2008, RELAXED } ieee754 = STRICT; ++enum ieee754_mode { STRICT, LEGACY, STD2008, RELAXED }; ++#ifdef CONFIG_CPU_LOONGSON64 ++static enum ieee754_mode ieee754 = RELAXED; ++#else ++static enum ieee754_mode ieee754 = STRICT; ++#endif + + /* + * Set the IEEE 754 NaN encodings and the ABS.fmt/NEG.fmt execution modes |