Compile ROM code within Hostboot

Additionally added version id to resolve story 135747

RTC: 143902
Change-Id: I67ad4b28b76464aaa58ec2c344cd1f9ceef9ff73
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/33608
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Nicholas E. Bofferding <bofferdn@us.ibm.com>
Reviewed-by: Michael Baiocchi <mbaiocch@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Martin Gloff <mgloff@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/src/lib/string_utils.C b/src/lib/string_utils.C
new file mode 100644
index 000000000..2ef8419a9
--- /dev/null
+++ b/src/lib/string_utils.C
@@ -0,0 +1,119 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/lib/string_utils.C $                                      */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2016,2017                        */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#include <string.h>
+#include <stdlib.h>
+
+extern "C" void *memset(void *vdest, int ch, size_t len)
+{
+    // TODO: align to an 8-byte boundary
+    // Loop, storing 8 bytes every 3 instructions
+    long *ldest = reinterpret_cast<long *>(vdest);
+    if (len >= sizeof(long))
+    {
+        long lch = ch & 0xFF;
+        lch |= lch<<8;
+        lch |= lch<<16;
+        lch |= lch<<32;
+        size_t len8 = len / sizeof(long);
+        size_t i = len8;
+        do {
+            ldest[--i] = lch;
+        } while( i > 0 );
+        ldest += len8;
+        len -= len8 * sizeof(long);
+    }
+
+    // Loop, storing 1 byte every 3 instructions
+    char *cdest = reinterpret_cast<char *>(ldest);
+    while (len >= sizeof(char))
+    {
+        *cdest++ = ch;
+        len -= sizeof(char);
+    }
+
+    return vdest;
+}
+
+extern "C" void *memcpy(void *vdest, const void *vsrc, size_t len)
+{
+    // TODO: align to an 8-byte boundary?
+
+    // Loop, copying 8 bytes every 5 instructions (TODO: 8/4 should be possible)
+    long *ldest = reinterpret_cast<long *>(vdest);
+    const long *lsrc = reinterpret_cast<const long *>(vsrc);
+
+    while (len >= sizeof(long))
+    {
+        *ldest++ = *lsrc++;
+        len -= sizeof(long);
+    }
+
+    // Loop, copying 1 byte every 4 instructions
+    char *cdest = reinterpret_cast<char *>(ldest);
+    const char *csrc = reinterpret_cast<const char *>(lsrc);
+    for (size_t i = 0; i < len; ++i)
+    {
+        cdest[i] = csrc[i];
+    }
+
+    return vdest;
+}
+
+extern "C" void *memmove(void *vdest, const void *vsrc, size_t len)
+{
+    // Copy first-to-last
+    if (vdest <= vsrc)
+    {
+        return memcpy(vdest,vsrc,len);
+    }
+
+    // Copy last-to-first (TO_DO: optimize)
+    char *dest = reinterpret_cast<char *>(vdest);
+    const char *src = reinterpret_cast<const char *>(vsrc);
+    for (size_t i = len; i > 0;)
+    {
+        --i;
+        dest[i] = src[i];
+    }
+
+    return vdest;
+}
+
+extern "C" int memcmp(const void *p1, const void *p2, size_t len)
+{
+    const char *c1 = reinterpret_cast<const char *>(p1);
+    const char *c2 = reinterpret_cast<const char *>(p2);
+
+    for (size_t i = 0; i < len; ++i)
+    {
+        long n = static_cast<long>(c1[i]) - static_cast<long>(c2[i]);
+        if (n != 0)
+        {
+            return n;
+        }
+    }
+
+    return 0;
+}
\ No newline at end of file