diff options
Diffstat (limited to 'toolchain/musl/patches/051-fix-float-formatting-of-some-exact-halfway-cases.patch')
| -rw-r--r-- | toolchain/musl/patches/051-fix-float-formatting-of-some-exact-halfway-cases.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/toolchain/musl/patches/051-fix-float-formatting-of-some-exact-halfway-cases.patch b/toolchain/musl/patches/051-fix-float-formatting-of-some-exact-halfway-cases.patch new file mode 100644 index 0000000000..d01a163ce2 --- /dev/null +++ b/toolchain/musl/patches/051-fix-float-formatting-of-some-exact-halfway-cases.patch @@ -0,0 +1,30 @@ +From 51ab6db4ed115d079d7131975e4adb074ba9ef9d Mon Sep 17 00:00:00 2001 +From: Szabolcs Nagy <nsz@port70.net> +Date: Wed, 12 Oct 2016 00:49:59 +0200 +Subject: fix float formatting of some exact halfway cases + +in nearest rounding mode exact halfway cases were not following the +round to even rule if the rounding happened at a base 1000000000 digit +boundary of the internal representation and the previous digit was odd. + +e.g. printf("%.0f", 1.5) printed 1 instead of 2. +--- + src/stdio/vfprintf.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c +index e2ab2dc..60da14d 100644 +--- a/src/stdio/vfprintf.c ++++ b/src/stdio/vfprintf.c +@@ -345,7 +345,8 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t) + if (x || d+1!=z) { + long double round = 2/LDBL_EPSILON; + long double small; +- if (*d/i & 1) round += 2; ++ if ((*d/i & 1) || (i==1000000000 && d>a && (d[-1]&1))) ++ round += 2; + if (x<i/2) small=0x0.8p0; + else if (x==i/2 && d+1==z) small=0x1.0p0; + else small=0x1.8p0; +-- +cgit v0.11.2 |