Module Name: src
Committed By: maya
Date: Mon Dec 19 17:38:24 UTC 2016
Modified Files:
src/tests/lib/libm: Makefile
Added Files:
src/tests/lib/libm: t_fe_round.c
Log Message:
add test for fesetround/fegetround that uses lrint (and tests it a bunch).
It doesn't fail on amd64.
To generate a diff of this commit:
cvs rdiff -u -r1.40 -r1.41 src/tests/lib/libm/Makefile
cvs rdiff -u -r0 -r1.1 src/tests/lib/libm/t_fe_round.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/tests/lib/libm/Makefile
diff -u src/tests/lib/libm/Makefile:1.40 src/tests/lib/libm/Makefile:1.41
--- src/tests/lib/libm/Makefile:1.40 Wed Aug 31 14:05:10 2016
+++ src/tests/lib/libm/Makefile Mon Dec 19 17:38:24 2016
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.40 2016/08/31 14:05:10 maya Exp $
+# $NetBSD: Makefile,v 1.41 2016/12/19 17:38:24 maya Exp $
.include <bsd.own.mk>
@@ -23,6 +23,7 @@ TESTS_C+= t_cosh
TESTS_C+= t_erf
TESTS_C+= t_exp
TESTS_C+= t_fenv
+TESTS_C+= t_fe_round
TESTS_C+= t_fmod
TESTS_C+= t_hypot
TESTS_C+= t_ilogb
Added files:
Index: src/tests/lib/libm/t_fe_round.c
diff -u /dev/null src/tests/lib/libm/t_fe_round.c:1.1
--- /dev/null Mon Dec 19 17:38:24 2016
+++ src/tests/lib/libm/t_fe_round.c Mon Dec 19 17:38:24 2016
@@ -0,0 +1,124 @@
+/*
+ * Written by Maya Rashish <m...@netbsd.org>
+ * Public domain.
+ *
+ * Testing IEEE-754 rounding modes (and lrint)
+ */
+
+#include <atf-c.h>
+#include <fenv.h>
+#ifdef __HAVE_FENV
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/*#pragma STDC FENV_ACCESS ON gcc?? */
+
+#define INT 9223L
+
+#define EPSILON 0.001
+
+static const struct {
+ int round_mode;
+ double input;
+ long int expected;
+} values[] = {
+ { FE_DOWNWARD, 3.7, 3},
+ { FE_DOWNWARD, -3.7, -4},
+ { FE_DOWNWARD, +0, 0},
+ { FE_DOWNWARD, -INT-0.01, -INT-1},
+ { FE_DOWNWARD, +INT-0.01, INT-1},
+ { FE_DOWNWARD, -INT+0.01, -INT},
+ { FE_DOWNWARD, +INT+0.01, INT},
+#if 0 /* cpu bugs? */
+ { FE_DOWNWARD, -0, -1},
+
+ { FE_UPWARD, +0, 1},
+#endif
+ { FE_UPWARD, -0, 0},
+ { FE_UPWARD, -123.7, -123},
+ { FE_UPWARD, 123.999, 124},
+ { FE_UPWARD, -INT-0.01, -INT},
+ { FE_UPWARD, +INT-0.01, INT},
+ { FE_UPWARD, -INT+0.01, -INT+1},
+ { FE_UPWARD, +INT+0.01, INT+1},
+
+ { FE_TOWARDZERO, 1.99, 1},
+ { FE_TOWARDZERO, -1.99, -1},
+ { FE_TOWARDZERO, 0.2, 0},
+ { FE_TOWARDZERO, INT+0.01, INT},
+ { FE_TOWARDZERO, INT-0.01, INT - 1},
+ { FE_TOWARDZERO, -INT+0.01, -INT + 1},
+ { FE_TOWARDZERO, +0, 0},
+ { FE_TOWARDZERO, -0, 0},
+
+ { FE_TONEAREST, -INT-0.01, -INT},
+ { FE_TONEAREST, +INT-0.01, INT},
+ { FE_TONEAREST, -INT+0.01, -INT},
+ { FE_TONEAREST, +INT+0.01, INT},
+ { FE_TONEAREST, -INT-0.501, -INT-1},
+ { FE_TONEAREST, +INT-0.501, INT-1},
+ { FE_TONEAREST, -INT+0.501, -INT+1},
+ { FE_TONEAREST, +INT+0.501, INT+1},
+ { FE_TONEAREST, +0, 0},
+ { FE_TONEAREST, -0, 0},
+};
+
+ATF_TC(fe_round);
+ATF_TC_HEAD(fe_round, tc)
+{
+ atf_tc_set_md_var(tc, "descr","Checking IEEE 754 rounding modes using lrint");
+}
+
+ATF_TC_BODY(fe_round, tc)
+{
+ long int received;
+
+ for (unsigned int i = 0; i < __arraycount(values); i++) {
+ fesetround(values[i].round_mode);
+
+ received = lrint(values[i].input);
+ ATF_CHECK_MSG(
+ (abs(received - values[i].expected) < EPSILON),
+ "lrint rounding wrong, difference too large\n"
+ "input: %f (index %d): got %ld, expected %ld\n",
+ values[i].input, i, received, values[i].expected);
+
+ /* Do we get the same rounding mode out? */
+ ATF_CHECK_MSG(
+ (fegetround() == values[i].round_mode),
+ "Didn't get the same rounding mode out!\n"
+ "(index %d) fed in %d rounding mode, got %d out\n",
+ i, fegetround(), values[i].round_mode);
+ }
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+ ATF_TP_ADD_TC(tp, fe_round);
+
+ return atf_no_error();
+}
+#else
+ATF_TC(t_nofe_round);
+
+ATF_TC_HEAD(t_nofe_round, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "dummy test case - no fenv.h support");
+}
+
+
+ATF_TC_BODY(t_nofe_round, tc)
+{
+ atf_tc_skip("no fenv.h support on this architecture");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+ ATF_TP_ADD_TC(tp, t_nofe_round);
+ return atf_no_error();
+}
+
+#endif
