Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/tests/x86check.c b/third_party/gmp/tests/x86check.c
new file mode 100644
index 0000000..12ea5b7
--- /dev/null
+++ b/third_party/gmp/tests/x86check.c
@@ -0,0 +1,117 @@
+/* x86 calling conventions checking. */
+
+/*
+Copyright 2000, 2001, 2010 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library test suite.
+
+The GNU MP Library test suite is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 3 of the License,
+or (at your option) any later version.
+
+The GNU MP Library test suite is distributed in the hope that it will be
+useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
+
+#include <stdio.h>
+#include "gmp-impl.h"
+#include "tests.h"
+
+
+/* Vector if constants and register values. We use one vector to allow access
+ via a base pointer, very beneficial for the PIC-enabled amd64call.asm. */
+mp_limb_t calling_conventions_values[17] =
+{
+ CNST_LIMB(0x12345678), /* want_ebx */
+ CNST_LIMB(0x89ABCDEF), /* want_ebp */
+ CNST_LIMB(0xDEADBEEF), /* want_esi */
+ CNST_LIMB(0xFFEEDDCC), /* want_edi */
+
+ CNST_LIMB(0xFEEDABBA), /* JUNK_EAX */
+ CNST_LIMB(0xAB78DE89), /* JUNK_ECX */
+ CNST_LIMB(0x12389018) /* JUNK_EDX */
+
+ /* rest of array used for dynamic values. */
+};
+
+/* Index starts for various regions in above vector. */
+#define WANT 0
+#define JUNK 4
+#define SAVE 7
+#define RETADDR 11
+#define VAL 12
+#define EFLAGS 16
+
+
+/* values to check */
+#ifdef __cplusplus
+extern "C" {
+#endif
+struct {
+ unsigned control;
+ unsigned status;
+ unsigned tag;
+ unsigned other[4];
+} calling_conventions_fenv;
+#ifdef __cplusplus
+}
+#endif
+
+/* expected values, as per x86call.asm */
+#define VALUE_EBX 0x01234567
+#define VALUE_ESI 0x89ABCDEF
+#define VALUE_EDI 0xFEDCBA98
+#define VALUE_EBP 0x76543210
+
+
+const char *regname[] = {"ebx", "ebp", "esi", "edi"};
+
+#define DIR_BIT(eflags) (((eflags) & (1<<10)) != 0)
+
+
+/* Return 1 if ok, 0 if not */
+
+int
+calling_conventions_check (void)
+{
+ const char *header = "Violated calling conventions:\n";
+ int ret = 1;
+ int i;
+
+#define CHECK(callreg, regstr, value) \
+ if (callreg != value) \
+ { \
+ printf ("%s %s got 0x%08X want 0x%08X\n", \
+ header, regstr, callreg, value); \
+ header = ""; \
+ ret = 0; \
+ }
+
+ for (i = 0; i < 4; i++)
+ {
+ CHECK (calling_conventions_values[VAL+i], regname[i], calling_conventions_values[WANT+i]);
+ }
+
+ if (DIR_BIT (calling_conventions_values[EFLAGS]) != 0)
+ {
+ printf ("%s eflags dir bit got %d want 0\n",
+ header, DIR_BIT (calling_conventions_values[EFLAGS]));
+ header = "";
+ ret = 0;
+ }
+
+ if ((calling_conventions_fenv.tag & 0xFFFF) != 0xFFFF)
+ {
+ printf ("%s fpu tags got 0x%X want 0xFFFF\n",
+ header, calling_conventions_fenv.tag & 0xFFFF);
+ header = "";
+ ret = 0;
+ }
+
+ return ret;
+}