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-rw-r--r--sysdeps/powerpc/powerpc32/power6/wordcopy.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/power6/wordcopy.c b/sysdeps/powerpc/powerpc32/power6/wordcopy.c
new file mode 100644
index 0000000000..ddf28659f9
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power6/wordcopy.c
@@ -0,0 +1,287 @@
+/* _memcopy.c -- subroutines for memory copy functions.
+ Copyright (C) 1991, 1996, 2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Torbjorn Granlund (tege@sics.se).
+ Updated for POWER6 by Steven Munroe (sjmunroe@us.ibm.com).
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* BE VERY CAREFUL IF YOU CHANGE THIS CODE...! */
+
+#include <stddef.h>
+#include <memcopy.h>
+
+/* _wordcopy_fwd_aligned -- Copy block beginning at SRCP to
+ block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
+ Both SRCP and DSTP should be aligned for memory operations on `op_t's. */
+
+void
+_wordcopy_fwd_aligned (dstp, srcp, len)
+ long int dstp;
+ long int srcp;
+ size_t len;
+{
+ op_t a0, a1;
+
+ if (len & 1)
+ {
+ ((op_t *) dstp)[0] = ((op_t *) srcp)[0];
+
+ if (len == 1)
+ return;
+ srcp += OPSIZ;
+ dstp += OPSIZ;
+ len -= 1;
+ }
+
+ do
+ {
+ a0 = ((op_t *) srcp)[0];
+ a1 = ((op_t *) srcp)[1];
+ ((op_t *) dstp)[0] = a0;
+ ((op_t *) dstp)[1] = a1;
+
+ srcp += 2 * OPSIZ;
+ dstp += 2 * OPSIZ;
+ len -= 2;
+ }
+ while (len != 0);
+}
+
+/* _wordcopy_fwd_dest_aligned -- Copy block beginning at SRCP to
+ block beginning at DSTP with LEN `op_t' words (not LEN bytes!).
+ DSTP should be aligned for memory operations on `op_t's, but SRCP must
+ *not* be aligned. */
+
+void
+_wordcopy_fwd_dest_aligned (dstp, srcp, len)
+ long int dstp;
+ long int srcp;
+ size_t len;
+{
+ op_t a0, a1, a2;
+ int sh_1, sh_2;
+ int align;
+
+ /* Calculate how to shift a word read at the memory operation
+ aligned srcp to make it aligned for copy. */
+
+ align = srcp % OPSIZ;
+ sh_1 = 8 * (srcp % OPSIZ);
+ sh_2 = 8 * OPSIZ - sh_1;
+
+ /* Make SRCP aligned by rounding it down to the beginning of the `op_t'
+ it points in the middle of. */
+ srcp &= -OPSIZ;
+ a0 = ((op_t *) srcp)[0];
+
+ if (len & 1)
+ {
+ a1 = ((op_t *) srcp)[1];
+ ((op_t *) dstp)[0] = MERGE (a0, sh_1, a1, sh_2);
+
+ if (len == 1)
+ return;
+
+ a0 = a1;
+ srcp += OPSIZ;
+ dstp += OPSIZ;
+ len -= 1;
+ }
+
+ switch (align)
+ {
+ case 1:
+ do
+ {
+ a1 = ((op_t *) srcp)[1];
+ a2 = ((op_t *) srcp)[2];
+ ((op_t *) dstp)[0] = MERGE (a0, 8, a1, (32-8));
+ ((op_t *) dstp)[1] = MERGE (a1, 8, a2, (32-8));
+ a0 = a2;
+
+ srcp += 2 * OPSIZ;
+ dstp += 2 * OPSIZ;
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ case 2:
+ do
+ {
+ a1 = ((op_t *) srcp)[1];
+ a2 = ((op_t *) srcp)[2];
+ ((op_t *) dstp)[0] = MERGE (a0, 16, a1, (32-16));
+ ((op_t *) dstp)[1] = MERGE (a1, 16, a2, (32-16));
+ a0 = a2;
+
+ srcp += 2 * OPSIZ;
+ dstp += 2 * OPSIZ;
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ case 3:
+ do
+ {
+ a1 = ((op_t *) srcp)[1];
+ a2 = ((op_t *) srcp)[2];
+ ((op_t *) dstp)[0] = MERGE (a0, 24, a1, (32-24));
+ ((op_t *) dstp)[1] = MERGE (a1, 24, a2, (32-24));
+ a0 = a2;
+
+ srcp += 2 * OPSIZ;
+ dstp += 2 * OPSIZ;
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ }
+
+}
+
+/* _wordcopy_bwd_aligned -- Copy block finishing right before
+ SRCP to block finishing right before DSTP with LEN `op_t' words
+ (not LEN bytes!). Both SRCP and DSTP should be aligned for memory
+ operations on `op_t's. */
+
+void
+_wordcopy_bwd_aligned (dstp, srcp, len)
+ long int dstp;
+ long int srcp;
+ size_t len;
+{
+ op_t a0, a1;
+
+ if (len & 1)
+ {
+ srcp -= OPSIZ;
+ dstp -= OPSIZ;
+ ((op_t *) dstp)[0] = ((op_t *) srcp)[0];
+
+ if (len == 1)
+ return;
+ len -= 1;
+ }
+
+ do
+ {
+ srcp -= 2 * OPSIZ;
+ dstp -= 2 * OPSIZ;
+
+ a1 = ((op_t *) srcp)[1];
+ a0 = ((op_t *) srcp)[0];
+ ((op_t *) dstp)[1] = a1;
+ ((op_t *) dstp)[0] = a0;
+
+ len -= 2;
+ }
+ while (len != 0);
+}
+
+/* _wordcopy_bwd_dest_aligned -- Copy block finishing right
+ before SRCP to block finishing right before DSTP with LEN `op_t'
+ words (not LEN bytes!). DSTP should be aligned for memory
+ operations on `op_t', but SRCP must *not* be aligned. */
+
+void
+_wordcopy_bwd_dest_aligned (dstp, srcp, len)
+ long int dstp;
+ long int srcp;
+ size_t len;
+{
+ op_t a0, a1, a2;
+ int sh_1, sh_2;
+ int align;
+
+ /* Calculate how to shift a word read at the memory operation
+ aligned srcp to make it aligned for copy. */
+
+ align = srcp % OPSIZ;
+ sh_1 = 8 * (srcp % OPSIZ);
+ sh_2 = 8 * OPSIZ - sh_1;
+
+ /* Make srcp aligned by rounding it down to the beginning of the op_t
+ it points in the middle of. */
+ srcp &= -OPSIZ;
+ a2 = ((op_t *) srcp)[0];
+
+ if (len & 1)
+ {
+ srcp -= OPSIZ;
+ dstp -= OPSIZ;
+ a1 = ((op_t *) srcp)[0];
+ ((op_t *) dstp)[0] = MERGE (a1, sh_1, a2, sh_2);
+
+ if (len == 1)
+ return;
+
+ a2 = a1;
+ len -= 1;
+ }
+
+ switch (align)
+ {
+ case 1:
+ do
+ {
+ srcp -= 2 * OPSIZ;
+ dstp -= 2 * OPSIZ;
+
+ a1 = ((op_t *) srcp)[1];
+ a0 = ((op_t *) srcp)[0];
+ ((op_t *) dstp)[1] = MERGE (a1, 8, a2, (32-8));
+ ((op_t *) dstp)[0] = MERGE (a0, 8, a1, (32-8));
+ a2 = a0;
+
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ case 2:
+ do
+ {
+ srcp -= 2 * OPSIZ;
+ dstp -= 2 * OPSIZ;
+
+ a1 = ((op_t *) srcp)[1];
+ a0 = ((op_t *) srcp)[0];
+ ((op_t *) dstp)[1] = MERGE (a1, 16, a2, (32-16));
+ ((op_t *) dstp)[0] = MERGE (a0, 16, a1, (32-16));
+ a2 = a0;
+
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ case 3:
+ do
+ {
+ srcp -= 2 * OPSIZ;
+ dstp -= 2 * OPSIZ;
+
+ a1 = ((op_t *) srcp)[1];
+ a0 = ((op_t *) srcp)[0];
+ ((op_t *) dstp)[1] = MERGE (a1, 24, a2, (32-24));
+ ((op_t *) dstp)[0] = MERGE (a0, 24, a1, (32-24));
+ a2 = a0;
+
+ len -= 2;
+ }
+ while (len != 0);
+ break;
+ }
+}
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