tests/tcg: move some multiarch files and make conditional

We had some messy code to filter out stuff we can't build. Lets junk
that and simplify the logic by pushing some stuff into subdirs. In
particular we move:

  float_helpers into libs - not a standalone test
  linux-test into linux - so we only build on Linux hosts

This allows for at least some of the tests to be nominally usable
by *BSD user builds.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Message-Id: <20210917162332.3511179-4-alex.bennee@linaro.org>

1 files changed, 228 insertions, 0 deletions

diff --git a/tests/tcg/multiarch/libs/float_helpers.c b/tests/tcg/multiarch/libs/float_helpers.c
new file mode 100644
index 0000000000..4e68d2b659
--- /dev/null
+++ b/tests/tcg/multiarch/libs/float_helpers.c
@@ -0,0 +1,228 @@
+/*
+ * Common Float Helpers
+ *
+ * This contains a series of useful utility routines and a set of
+ * floating point constants useful for exercising the edge cases in
+ * floating point tests.
+ *
+ * Copyright (c) 2019 Linaro
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+/* we want additional float type definitions */
+#define __STDC_WANT_IEC_60559_BFP_EXT__
+#define __STDC_WANT_IEC_60559_TYPES_EXT__
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <math.h>
+#include <float.h>
+#include <fenv.h>
+
+#include "../float_helpers.h"
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/*
+ * Half Precision Numbers
+ *
+ * Not yet well standardised so we return a plain uint16_t for now.
+ */
+
+/* no handy defines for these numbers */
+static uint16_t f16_numbers[] = {
+    0xffff, /* -NaN / AHP -Max */
+    0xfcff, /* -NaN / AHP */
+    0xfc01, /* -NaN / AHP */
+    0xfc00, /* -Inf */
+    0xfbff, /* -Max */
+    0xc000, /* -2 */
+    0xbc00, /* -1 */
+    0x8001, /* -MIN subnormal */
+    0x8000, /* -0 */
+    0x0000, /* +0 */
+    0x0001, /* MIN subnormal */
+    0x3c00, /* 1 */
+    0x7bff, /* Max */
+    0x7c00, /* Inf */
+    0x7c01, /* NaN / AHP */
+    0x7cff, /* NaN / AHP */
+    0x7fff, /* NaN / AHP +Max*/
+};
+
+static const int num_f16 = ARRAY_SIZE(f16_numbers);
+
+int get_num_f16(void)
+{
+    return num_f16;
+}
+
+uint16_t get_f16(int i)
+{
+    return f16_numbers[i % num_f16];
+}
+
+/* only display as hex */
+char *fmt_16(uint16_t num)
+{
+    char *fmt;
+    asprintf(&fmt, "f16(%#04x)", num);
+    return fmt;
+}
+
+/*
+ * Single Precision Numbers
+ */
+
+#ifndef SNANF
+/* Signaling NaN macros, if supported.  */
+#  define SNANF (__builtin_nansf (""))
+#  define SNAN (__builtin_nans (""))
+#  define SNANL (__builtin_nansl (""))
+#endif
+
+static float f32_numbers[] = {
+    -SNANF,
+    -NAN,
+    -INFINITY,
+    -FLT_MAX,
+    -0x1.1874b2p+103,
+    -0x1.c0bab6p+99,
+    -0x1.31f75p-40,
+    -0x1.505444p-66,
+    -FLT_MIN,
+    0.0,
+    FLT_MIN,
+    0x1p-25,
+    0x1.ffffe6p-25, /* min positive FP16 subnormal */
+    0x1.ff801ap-15, /* max subnormal FP16 */
+    0x1.00000cp-14, /* min positive normal FP16 */
+    1.0,
+    0x1.004p+0, /* smallest float after 1.0 FP16 */
+    2.0,
+    M_E, M_PI,
+    0x1.ffbep+15,
+    0x1.ffcp+15, /* max FP16 */
+    0x1.ffc2p+15,
+    0x1.ffbfp+16,
+    0x1.ffcp+16, /* max AFP */
+    0x1.ffc1p+16,
+    0x1.c0bab6p+99,
+    FLT_MAX,
+    INFINITY,
+    NAN,
+    SNANF
+};
+
+static const int num_f32 = ARRAY_SIZE(f32_numbers);
+
+int get_num_f32(void)
+{
+    return num_f32;
+}
+
+float get_f32(int i)
+{
+    return f32_numbers[i % num_f32];
+}
+
+char *fmt_f32(float num)
+{
+    uint32_t single_as_hex = *(uint32_t *) &num;
+    char *fmt;
+    asprintf(&fmt, "f32(%02.20a:%#010x)", num, single_as_hex);
+    return fmt;
+}
+
+
+/* This allows us to initialise some doubles as pure hex */
+typedef union {
+    double d;
+    uint64_t h;
+} test_doubles;
+
+static test_doubles f64_numbers[] = {
+    {SNAN},
+    {-NAN},
+    {-INFINITY},
+    {-DBL_MAX},
+    {-FLT_MAX-1.0},
+    {-FLT_MAX},
+    {-1.111E+31},
+    {-1.111E+30}, /* half prec */
+    {-2.0}, {-1.0},
+    {-DBL_MIN},
+    {-FLT_MIN},
+    {0.0},
+    {FLT_MIN},
+    {2.98023224e-08},
+    {5.96046E-8}, /* min positive FP16 subnormal */
+    {6.09756E-5}, /* max subnormal FP16 */
+    {6.10352E-5}, /* min positive normal FP16 */
+    {1.0},
+    {1.0009765625}, /* smallest float after 1.0 FP16 */
+    {DBL_MIN},
+    {1.3789972848607228e-308},
+    {1.4914738736681624e-308},
+    {1.0}, {2.0},
+    {M_E}, {M_PI},
+    {65503.0},
+    {65504.0}, /* max FP16 */
+    {65505.0},
+    {131007.0},
+    {131008.0}, /* max AFP */
+    {131009.0},
+    {.h = 0x41dfffffffc00000 }, /* to int = 0x7fffffff */
+    {FLT_MAX},
+    {FLT_MAX + 1.0},
+    {DBL_MAX},
+    {INFINITY},
+    {NAN},
+    {.h = 0x7ff0000000000001}, /* SNAN */
+    {SNAN},
+};
+
+static const int num_f64 = ARRAY_SIZE(f64_numbers);
+
+int get_num_f64(void)
+{
+    return num_f64;
+}
+
+double get_f64(int i)
+{
+    return f64_numbers[i % num_f64].d;
+}
+
+char *fmt_f64(double num)
+{
+    uint64_t double_as_hex = *(uint64_t *) &num;
+    char *fmt;
+    asprintf(&fmt, "f64(%02.20a:%#020" PRIx64 ")", num, double_as_hex);
+    return fmt;
+}
+
+/*
+ * Float flags
+ */
+char *fmt_flags(void)
+{
+    int flags = fetestexcept(FE_ALL_EXCEPT);
+    char *fmt;
+
+    if (flags) {
+        asprintf(&fmt, "%s%s%s%s%s",
+                 flags & FE_OVERFLOW ? "OVERFLOW " : "",
+                 flags & FE_UNDERFLOW ? "UNDERFLOW " : "",
+                 flags & FE_DIVBYZERO ? "DIV0 " : "",
+                 flags & FE_INEXACT ? "INEXACT " : "",
+                 flags & FE_INVALID ? "INVALID" : "");
+    } else {
+        asprintf(&fmt, "OK");
+    }
+
+    return fmt;
+}