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Diffstat (limited to 'lib/libc/tests/stdio/printfloat_test.c')
-rw-r--r--lib/libc/tests/stdio/printfloat_test.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/libc/tests/stdio/printfloat_test.c b/lib/libc/tests/stdio/printfloat_test.c
index 031859124163..4493fe1c15d3 100644
--- a/lib/libc/tests/stdio/printfloat_test.c
+++ b/lib/libc/tests/stdio/printfloat_test.c
@@ -398,6 +398,18 @@ ATF_TC_BODY(subnormal_float, tc)
testfmt("-0X1P-149", "%A", negative);
}
+ATF_TC_WITHOUT_HEAD(hexadecimal_rounding_fullprec);
+ATF_TC_BODY(hexadecimal_rounding_fullprec, tc)
+{
+ /* Double: %.13a with binary64 mantissa=53 */
+ testfmt("0x1.1234567890bbbp+0", "%.13a", 0x1.1234567890bbbp+0);
+
+#if defined(__aarch64__)
+ /* On arm64, long double is IEEE binary128 (mantissa=113) */
+ testfmt("0x1.3c0ca428c59fbbbbbbbbbbbbbbbbp+0", "%.28La", 0x1.3c0ca428c59fbbbbbbbbbbbbbbbbp+0L);
+#endif
+}
+
ATF_TP_ADD_TCS(tp)
{
@@ -414,6 +426,7 @@ ATF_TP_ADD_TCS(tp)
ATF_TP_ADD_TC(tp, hexadecimal_rounding);
ATF_TP_ADD_TC(tp, subnormal_double);
ATF_TP_ADD_TC(tp, subnormal_float);
+ ATF_TP_ADD_TC(tp, hexadecimal_rounding_fullprec);
return (atf_no_error());
}