140 lines
5.2 KiB
Diff
140 lines
5.2 KiB
Diff
Co-authored-by: Stefan Liebler <stli at linux.ibm.com>
|
|
---
|
|
mpn/s390_64/z13/mul_basecase.c | 124 +++++++++++++++++++++++++++++++++
|
|
1 file changed, 124 insertions(+)
|
|
create mode 100644 mpn/s390_64/z13/mul_basecase.c
|
|
|
|
diff --git a/mpn/s390_64/z13/mul_basecase.c b/mpn/s390_64/z13/mul_basecase.c
|
|
new file mode 100644
|
|
index 000000000..f1b7160b3
|
|
--- /dev/null
|
|
+++ b/mpn/s390_64/z13/mul_basecase.c
|
|
@@ -0,0 +1,125 @@
|
|
+/* mpn_mul_basecase for IBM z13 and later -- Internal routine to multiply two
|
|
+ natural numbers of length m and n.
|
|
+
|
|
+ THIS IS AN INTERNAL FUNCTION WITH A MUTABLE INTERFACE. IT IS ONLY
|
|
+ SAFE TO REACH THIS FUNCTION THROUGH DOCUMENTED INTERFACES.
|
|
+
|
|
+Copyright 2021 Free Software Foundation, Inc.
|
|
+
|
|
+This file is part of the GNU MP Library.
|
|
+
|
|
+The GNU MP Library is free software; you can redistribute it and/or modify
|
|
+it under the terms of either:
|
|
+
|
|
+ * the GNU Lesser General Public License as published by the Free
|
|
+ Software Foundation; either version 3 of the License, or (at your
|
|
+ option) any later version.
|
|
+
|
|
+or
|
|
+
|
|
+ * the GNU General Public License as published by the Free Software
|
|
+ Foundation; either version 2 of the License, or (at your option) any
|
|
+ later version.
|
|
+
|
|
+or both in parallel, as here.
|
|
+
|
|
+The GNU MP Library 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 copies of the GNU General Public License and the
|
|
+GNU Lesser General Public License along with the GNU MP Library. If not,
|
|
+see https://www.gnu.org/licenses/. */
|
|
+
|
|
+#include <stdlib.h>
|
|
+
|
|
+#include "gmp.h"
|
|
+#include "gmp-impl.h"
|
|
+
|
|
+/* Note: we explicitly inline all mul and addmul routines here to reduce the
|
|
+ * number of branches in prologues of unrolled functions. That comes at the
|
|
+ cost of duplicating common loop bodies in object code. */
|
|
+#define DO_INLINE
|
|
+
|
|
+/*
|
|
+ * tweak loop conditions in addmul subroutines to enable use of
|
|
+ * branch-relative-on-count (BRCTG) instructions, which currently results in
|
|
+ * better performance.
|
|
+ */
|
|
+#define BRCTG
|
|
+
|
|
+#include "s390_64/z13/common-vec.h"
|
|
+
|
|
+#define OPERATION_mul_1
|
|
+#include "s390_64/z13/addmul_1.c"
|
|
+#undef OPERATION_mul_1
|
|
+
|
|
+#define OPERATION_addmul_1
|
|
+#include "s390_64/z13/addmul_1.c"
|
|
+#undef OPERATION_addmul_1
|
|
+
|
|
+#define OPERATION_mul_2
|
|
+#include "s390_64/z13/aormul_2.c"
|
|
+#undef OPERATION_mul_2
|
|
+
|
|
+#define OPERATION_addmul_2
|
|
+#include "s390_64/z13/aormul_2.c"
|
|
+#undef OPERATION_addmul_2
|
|
+
|
|
+void
|
|
+mpn_mul_basecase (mp_ptr rp, mp_srcptr up, mp_size_t un, mp_srcptr vp,
|
|
+ mp_size_t vn)
|
|
+{
|
|
+ ASSERT (un >= vn);
|
|
+ ASSERT (vn >= 1);
|
|
+ ASSERT (!MPN_OVERLAP_P (rp, un + vn, up, un));
|
|
+ ASSERT (!MPN_OVERLAP_P (rp, un + vn, vp, vn));
|
|
+
|
|
+ /* The implementations of (add)mul_1/2 are 4x-unrolled. Pull out the branch
|
|
+ * for un%4 and inline specific variants. */
|
|
+
|
|
+#define BRANCH_FOR_MOD(N) \
|
|
+ do \
|
|
+ { \
|
|
+ if (vn >= 2) \
|
|
+ { \
|
|
+ rp[un + 1] = inline_mul_2 (rp, up, un, vp); \
|
|
+ rp += 2, vp += 2, vn -= 2; \
|
|
+ } \
|
|
+ else \
|
|
+ { \
|
|
+ rp[un] = inline_mul_1 (rp, up, un, vp[0]); \
|
|
+ return; \
|
|
+ } \
|
|
+ \
|
|
+ while (vn >= 2) \
|
|
+ { \
|
|
+ rp[un + 2 - 1] = inline_addmul_2 (rp, up, un, vp); \
|
|
+ rp += 2, vp += 2, vn -= 2; \
|
|
+ } \
|
|
+ \
|
|
+ while (vn >= 1) \
|
|
+ { \
|
|
+ rp[un] = inline_addmul_1 (rp, up, un, vp[0]); \
|
|
+ rp += 1, vp += 1, vn -= 1; \
|
|
+ } \
|
|
+ } \
|
|
+ while (0);
|
|
+
|
|
+ switch (((size_t)un) % 4)
|
|
+ {
|
|
+ case 0:
|
|
+ BRANCH_FOR_MOD (0);
|
|
+ break;
|
|
+ case 1:
|
|
+ BRANCH_FOR_MOD (1);
|
|
+ break;
|
|
+ case 2:
|
|
+ BRANCH_FOR_MOD (2);
|
|
+ break;
|
|
+ case 3:
|
|
+ BRANCH_FOR_MOD (3);
|
|
+ break;
|
|
+ }
|
|
+}
|
|
--
|
|
2.40.1
|