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/amd64check.c b/third_party/gmp/tests/amd64check.c
new file mode 100644
index 0000000..a8cdbe2
--- /dev/null
+++ b/third_party/gmp/tests/amd64check.c
@@ -0,0 +1,111 @@
+/* AMD64 calling conventions checking.
+
+Copyright 2000, 2001, 2004, 2007 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[23] =
+{
+ CNST_LIMB(0x1234567887654321), /* want_rbx */
+ CNST_LIMB(0x89ABCDEFFEDCBA98), /* want_rbp */
+ CNST_LIMB(0xDEADBEEFBADECAFE), /* want_r12 */
+ CNST_LIMB(0xFFEEDDCCBBAA9988), /* want_r13 */
+ CNST_LIMB(0x0011223344556677), /* want_r14 */
+ CNST_LIMB(0x1234432156788765), /* want_r15 */
+
+ CNST_LIMB(0xFEEDABBACAAFBEED), /* JUNK_RAX */
+ CNST_LIMB(0xAB78DE89FF5125BB), /* JUNK_R10 */
+ CNST_LIMB(0x1238901890189031) /* JUNK_R11 */
+
+ /* rest of array used for dynamic values. */
+};
+
+/* Index starts for various regions in above vector. */
+#define WANT 0
+#define JUNK 6
+#define SAVE 9
+#define RETADDR 15
+#define VAL 16
+#define RFLAGS 22
+
+/* values to check */
+#ifdef __cplusplus
+extern "C" {
+#endif
+struct {
+ int control;
+ int status;
+ int tag;
+ int other[4];
+} calling_conventions_fenv;
+#ifdef __cplusplus
+}
+#endif
+
+
+const char *regname[6] = {"rbx", "rbp", "r12", "r13", "r14", "r15"};
+
+#define DIR_BIT(rflags) (((rflags) & (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%016lX want 0x%016lX\n", \
+ header, regstr, callreg, value); \
+ header = ""; \
+ ret = 0; \
+ }
+
+ for (i = 0; i < 6; i++)
+ {
+ CHECK (calling_conventions_values[VAL+i], regname[i], calling_conventions_values[WANT+i]);
+ }
+
+ if (DIR_BIT (calling_conventions_values[RFLAGS]) != 0)
+ {
+ printf ("%s rflags dir bit got %d want 0\n",
+ header, DIR_BIT (calling_conventions_values[RFLAGS]));
+ 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;
+}