ext: Include libfputils

This changeset includes libfputils from revision bbf0d61d75. This
library can be used to convert to and from 80-bit floats and query the
type of an 80-bit float, which is needed to support the x87 FPU.

6 files changed, 506 insertions, 0 deletions

diff --git a/ext/fputils/tests/Makefile.am b/ext/fputils/tests/Makefile.am
new file mode 100644
index 000000000..6faffead2
--- /dev/null
+++ b/ext/fputils/tests/Makefile.am
@@ -0,0 +1,13 @@
+
+TEST_LOG_DRIVER = env AM_TAP_AWK='$(AWK)' $(SHELL) \
+                       $(top_srcdir)/tap-driver.sh
+
+LIBS=-lm $(top_builddir)/.libs/libfputils.la libtest.a
+
+FP80_TESTS=fp80_cvtd fp80_cvfd fp80_cvtf
+TESTS=$(FP80_TESTS)
+
+check_LIBRARIES=libtest.a
+check_PROGRAMS=$(FP80_TESTS)
+
+libtest_a_SOURCES=test_helper.c test_helper.h
diff --git a/ext/fputils/tests/fp80_cvfd.c b/ext/fputils/tests/fp80_cvfd.c
new file mode 100644
index 000000000..d4980287a
--- /dev/null
+++ b/ext/fputils/tests/fp80_cvfd.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2013, Andreas Sandberg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <fputils/fp80.h>
+
+#include "test_helper.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+test_cvfd_class(const char *name, double fin)
+{
+    test_diag("converting '%e' -> fp80...", fin);
+    fp80_t v = fp80_cvfd(fin);
+    int class_ok;
+    int fp64_class = fpclassify(fin);
+    int class = fp64_class == FP_SUBNORMAL ? FP_NORMAL : fp64_class;
+    int fp80_class = fp80_classify(v);
+
+    printf("# ");
+    fp80_debug_dump(stdout, v);
+    test_diag("isnan: %i, isinf: %i, iszero: %i, isnormal: %i, issubnormal: %i",
+              fp80_isnan(v), fp80_isinf(v), fp80_iszero(v),
+              fp80_isnormal(v), fp80_issubnormal(v));
+    test_diag("class(fp64): %i, expected class: %i, class(fp80): %i",
+              fp64_class, class, fp80_classify(v));
+    switch (class) {
+    case FP_NAN:
+        class_ok = fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) &&
+            !fp80_isnormal(v) && !fp80_issubnormal(v);
+        break;
+
+    case FP_INFINITE:
+        class_ok = !fp80_isnan(v) && fp80_isinf(v) && !fp80_iszero(v) &&
+            !fp80_isnormal(v) && !fp80_issubnormal(v);
+        break;
+    case FP_ZERO:
+        class_ok = !fp80_isnan(v) && !fp80_isinf(v) && fp80_iszero(v) &&
+            !fp80_isnormal(v) && !fp80_issubnormal(v);
+        break;
+
+    case FP_SUBNORMAL:
+        class_ok = !fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) &&
+            !fp80_isnormal(v) && fp80_issubnormal(v);
+        break;
+
+    case FP_NORMAL:
+        class_ok = !fp80_isnan(v) && !fp80_isinf(v) && !fp80_iszero(v) &&
+            fp80_isnormal(v) && !fp80_issubnormal(v);
+        break;
+
+    default:
+        test_bail("unexpected FP class (%i)", class);
+    }
+
+    if (!class_ok) {
+        test_diag("inconsistent classification");
+        test_fail(name);
+    } else if (fp80_class != class) {
+        test_diag("class mismatch");
+        test_fail(name);
+    } else {
+        test_ok(name);
+    }
+}
+
+static void
+test_cvfd_class_exp(const char *name, double x, int exp)
+{
+    double val = ldexp(x, exp);
+    test_cvfd_class(name, val);
+}
+
+int
+main(int argc, char *argv[])
+{
+    test_init(9);
+
+    test_cvfd_class("double->fp80 +inf", -INFINITY);
+    test_cvfd_class("double->fp80 -inf", INFINITY);
+    test_cvfd_class("double->fp80 +nan", NAN);
+    test_cvfd_class("double->fp80 -nan", -NAN);
+    test_cvfd_class("double->fp80 +0", 0);
+    test_cvfd_class("double->fp80 PI", M_PI);
+
+    test_cvfd_class_exp("double->fp80 smallest normal", 1.0, -1022);
+    test_cvfd_class_exp("double->fp80 denormal1", 0.5, -1022);
+    test_cvfd_class_exp("double->fp80 denormal2", 0.25, -1022);
+
+    test_exit();
+}
diff --git a/ext/fputils/tests/fp80_cvtd.c b/ext/fputils/tests/fp80_cvtd.c
new file mode 100644
index 000000000..425a5c44a
--- /dev/null
+++ b/ext/fputils/tests/fp80_cvtd.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2013, Andreas Sandberg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <fputils/fp80.h>
+
+#include "test_helper.h"
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+test_fp80_cvtd_class(const char *name, fp80_t fin, int class)
+{
+    double d = fp80_cvtd(fin);
+    if (fpclassify(d) != class) {
+        test_diag("wrong class");
+        test_fail(name);
+    } else {
+        test_ok(name);
+    }
+}
+
+static void
+test_fp80_cvtd_inf(const char *name, fp80_t fin, int inf_class)
+{
+    double d = fp80_cvtd(fin);
+    if (isinf(d) != inf_class) {
+        test_diag("wrong infinity type");
+        test_fail(name);
+    } else {
+        test_ok(name);
+    }
+}
+
+int
+main(int argc, char *argv[])
+{
+    test_init(6);
+
+    test_fp80_cvtd_inf("fp80->double +inf", fp80_pinf, 1);
+    test_fp80_cvtd_inf("fp80->double -inf", fp80_ninf, -1);
+    test_fp80_cvtd_class("fp80->double qnan", fp80_qnan, FP_NAN);
+    test_fp80_cvtd_class("fp80->double qnani", fp80_qnani, FP_NAN);
+    test_fp80_cvtd_class("fp80->double snan", fp80_snan, FP_NAN);
+    test_fp80_cvtd_class("fp80->double nan", fp80_nan, FP_NAN);
+
+    test_exit();
+}
diff --git a/ext/fputils/tests/fp80_cvtf.c b/ext/fputils/tests/fp80_cvtf.c
new file mode 100644
index 000000000..0edfb2ded
--- /dev/null
+++ b/ext/fputils/tests/fp80_cvtf.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2013, Andreas Sandberg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <fputils/fp80.h>
+
+#include "test_helper.h"
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static void
+test_cvtf(const char *name, double fin)
+{
+    fp80_t v80 = fp80_cvfd(fin);
+    double v64 = fp80_cvtd(v80);
+
+    test_diag("Conversion '%e' -> fp80 -> double: %e", fin, v64);
+
+    printf("# ");
+    fp80_debug_dump(stdout, v80);
+    if (v64 == fin ||
+        (isnan(fin) && isnan(v64) && signbit(fin) == signbit(v64))) {
+        test_ok(name);
+    } else {
+        test_diag("MISMATCH: %e != %e", fin, v64);
+        test_fail(name);
+    }
+}
+
+static void
+test_cvtf_exp(const char *name, double x, int exp)
+{
+    double val = ldexp(x, exp);
+    test_cvtf(name, val);
+}
+
+int
+main(int argc, char *argv[])
+{
+    test_init(9);
+
+    test_cvtf("+inf", -INFINITY);
+    test_cvtf("-inf", INFINITY);
+    test_cvtf("+nan", NAN);
+    test_cvtf("-nan", -NAN);
+    test_cvtf("+0", 0);
+    test_cvtf("PI", M_PI);
+
+    test_cvtf_exp("smallest normal", 1.0, -1022);
+    test_cvtf_exp("denormal1", 0.5, -1022);
+    test_cvtf_exp("denormal2", 0.25, -1022);
+
+    test_exit();
+}
diff --git a/ext/fputils/tests/test_helper.c b/ext/fputils/tests/test_helper.c
new file mode 100644
index 000000000..f2da28a04
--- /dev/null
+++ b/ext/fputils/tests/test_helper.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2013, Andreas Sandberg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "test_helper.h"
+
+#include <assert.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+unsigned test_current = 0;
+unsigned test_count = 0;
+unsigned test_fail_count = 0;
+
+void
+test_init(unsigned no_tests)
+{
+    assert(test_count == 0 && test_current == 0);
+
+    test_count = no_tests;
+    test_current = 1;
+    test_fail_count = 0;
+
+    printf("1..%u\n", no_tests);
+}
+
+void
+test_exit()
+{
+    if (test_fail_count)
+        exit(EXIT_FAILURE);
+    else
+        exit(EXIT_SUCCESS);
+}
+
+void
+test_bail(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+
+    printf("Bail out! ");
+    vprintf(fmt, ap);
+    printf("\n");
+
+    va_end(ap);
+
+    exit(EXIT_FAILURE);
+}
+
+void
+test_diag(const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+
+    printf("# ");
+    vprintf(fmt, ap);
+    printf("\n");
+
+    va_end(ap);
+}
+
+static void
+test_vstatus(const char *status, const char *test,
+             const char *directive,
+             const char *fmt_why, va_list ap)
+{
+    printf("%s %i", status, test_current);
+
+    if (test && test[0] != '\0')
+        printf(" - %s", test);
+
+    if (directive && directive[0] != '\0') {
+        printf(" # %s ", directive);
+        if (fmt_why && fmt_why[0] != '\0')
+            vprintf(fmt_why, ap);
+    }
+    printf("\n");
+
+    ++test_current;
+}
+
+static void __attribute__((format (printf, 4, 5)))
+test_status(const char *status, const char *test,
+            const char *directive,
+            const char *fmt_why, ...)
+{
+    va_list ap;
+    va_start(ap, fmt_why);
+
+    test_vstatus(status, test, directive, fmt_why, ap);
+
+    va_end(ap);
+}
+
+void
+test_ok(const char *test)
+{
+    test_status("ok", test, NULL, NULL);
+}
+
+void
+test_fail(const char *test)
+{
+    test_status("not ok", test, NULL, NULL);
+    ++test_fail_count;
+}
+
+void
+test_skip(const char *test, const char *fmt_why, ...)
+{
+    va_list ap;
+    va_start(ap, fmt_why);
+
+    test_vstatus("ok", test, "SKIP", fmt_why, ap);
+
+    va_end(ap);
+}
+
+void
+test_todo(const char *test, const char *fmt_why, ...)
+{
+    va_list ap;
+    va_start(ap, fmt_why);
+
+    test_vstatus("not ok", test, "TODO", fmt_why, ap);
+
+    va_end(ap);
+
+    ++test_fail_count;
+}
diff --git a/ext/fputils/tests/test_helper.h b/ext/fputils/tests/test_helper.h
new file mode 100644
index 000000000..1b090189a
--- /dev/null
+++ b/ext/fputils/tests/test_helper.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2013, Andreas Sandberg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _TEST_HELPER
+#define _TEST_HELPER 1
+
+#include <stdio.h>
+
+extern unsigned test_current;
+extern unsigned test_count;
+extern unsigned test_fail_count;
+
+void test_init(unsigned no_tests);
+void test_exit()
+    __attribute__((noreturn));
+
+void test_bail(const char *fmt, ...)
+    __attribute__((format (printf, 1, 2), noreturn));
+
+void test_diag(const char *fmt, ...)
+    __attribute__((format (printf, 1, 2)));
+
+void test_ok(const char *test);
+
+void test_fail(const char *test);
+
+void test_skip(const char *test, const char *fmt_why, ...)
+    __attribute__((format (printf, 2, 3)));
+
+void test_todo(const char *test, const char *fmt_why, ...)
+    __attribute__((format (printf, 2, 3)));
+
+#endif