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Diffstat (limited to 'arch/mips/math-emu/ieee754dp.c')
-rw-r--r--arch/mips/math-emu/ieee754dp.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/mips/math-emu/ieee754dp.c b/arch/mips/math-emu/ieee754dp.c
index 522d843f2ffd..ad3c73436777 100644
--- a/arch/mips/math-emu/ieee754dp.c
+++ b/arch/mips/math-emu/ieee754dp.c
@@ -37,8 +37,11 @@ static inline int ieee754dp_isnan(union ieee754dp x)
static inline int ieee754dp_issnan(union ieee754dp x)
{
+ int qbit;
+
assert(ieee754dp_isnan(x));
- return (DPMANT(x) & DP_MBIT(DP_FBITS - 1)) == DP_MBIT(DP_FBITS - 1);
+ qbit = (DPMANT(x) & DP_MBIT(DP_FBITS - 1)) == DP_MBIT(DP_FBITS - 1);
+ return ieee754_csr.nan2008 ^ qbit;
}
@@ -51,7 +54,12 @@ union ieee754dp __cold ieee754dp_nanxcpt(union ieee754dp r)
assert(ieee754dp_issnan(r));
ieee754_setcx(IEEE754_INVALID_OPERATION);
- return ieee754dp_indef();
+ if (ieee754_csr.nan2008)
+ DPMANT(r) |= DP_MBIT(DP_FBITS - 1);
+ else
+ r = ieee754dp_indef();
+
+ return r;
}
static u64 ieee754dp_get_rounding(int sn, u64 xm)