X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/36bab9e99aa4098398ce96f01b3c06aff6d0919e..35623150364de198acec466c14a210eb8ab63ae6:/src/gras/DataDesc/ddt_convert.c

diff --git a/src/gras/DataDesc/ddt_convert.c b/src/gras/DataDesc/ddt_convert.c
index e17837b342..0cb1fda860 100644
--- a/src/gras/DataDesc/ddt_convert.c
+++ b/src/gras/DataDesc/ddt_convert.c
@@ -1,30 +1,94 @@
-/* $Id$ */
-
 /* ddt_remote - Stuff needed to get datadescs about remote hosts            */
 
-/* Authors: Olivier Aumage, Martin Quinson                                  */
-/* Copyright (C) 2003, 2004 the GRAS posse.                                 */
+/* Copyright (c) 2004, 2005, 2006, 2009, 2010. The SimGrid Team.
+ * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
-   under the terms of the license (GNU LGPL) which comes with this package. */
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+/************************************************************************/
+/* C combines the power of assembler with the portability of assembler. */
+/************************************************************************/
 
-#include "DataDesc/datadesc_private.h"
+#include "gras/DataDesc/datadesc_private.h"
 
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(gras_ddt_convert, gras_ddt,
+                                "Inter-architecture convertions");
 
 /***
- *** Table of all known architectures. 
+ *** Table of all known architectures:
+ ***
+  l_C:1/1:_I:2/2:4/4:4/4:8/8:_P:4/4:4/4:_D:4/4:8/8:) gras_arch=0; gras_arch_name=little32;;
+  l_C:1/1:_I:2/2:4/4:4/4:8/4:_P:4/4:4/4:_D:4/4:8/4:) gras_arch=1; gras_arch_name=little32_4;;
+
+  l_C:1/1:_I:2/2:4/4:8/8:8/8:_P:8/8:8/8:_D:4/4:8/8:) gras_arch=2; gras_arch_name=little64;;
+
+  B_C:1/1:_I:2/2:4/4:4/4:8/8:_P:4/4:4/4:_D:4/4:8/8:) gras_arch=3; gras_arch_name=big32;;
+  B_C:1/1:_I:2/2:4/4:4/4:8/8:_P:4/4:4/4:_D:4/4:8/4:) gras_arch=4; gras_arch_name=big32_8_4;;
+  B_C:1/1:_I:2/2:4/4:4/4:8/4:_P:4/4:4/4:_D:4/4:8/4:) gras_arch=5; gras_arch_name=big32_4;;
+  B_C:1/1:_I:2/2:4/2:4/2:8/2:_P:4/2:4/2:_D:4/2:8/2:) gras_arch=6; gras_arch_name=big32_2;;
+
+  B_C:1/1:_I:2/2:4/4:8/8:8/8:_P:8/8:8/8:_D:4/4:8/8:) gras_arch=7; gras_arch_name=big64;;
+
+  
+  
+  PLEASE DO NOT MESS WITH THESE HARDCODED VALUES
+  
+  
+  Grep GRAS_THISARCH in buildtools/Cmake/CompleteInFiles.cmake for details
+  
  ***/
 
 const gras_arch_desc_t gras_arches[gras_arch_count] = {
-  {"i386",   0,   {1,2,4,4,8,   4,4,   4,8}}
+
+  {"little32_1", 0, {1, 2, 4, 4, 8, 4, 4, 4, 8},        /* little endian, 1 byte alignement (win32) */
+   {1, 1, 1, 1, 1, 1, 1, 1, 1}},
+
+  {"little32_2", 0, {1, 2, 4, 4, 8, 4, 4, 4, 8},        /* little endian, 2 bytes alignements (win32) */
+   {1, 2, 2, 2, 2, 2, 2, 2, 2}},
+
+  {"little32_4", 0, {1, 2, 4, 4, 8, 4, 4, 4, 8},        /* little endian, 4 bytes alignements (win32 and linux x86) */
+   {1, 2, 4, 4, 4, 4, 4, 4, 4}},
+
+  {"little32_8", 0, {1, 2, 4, 4, 8, 4, 4, 4, 8},        /* little endian, 8 bytes alignement (win32) */
+   {1, 2, 4, 4, 8, 4, 4, 4, 8}},
+
+  {"little64", 0, {1, 2, 4, 8, 8, 8, 8, 4, 8},  /* alpha, ia64 */
+   {1, 2, 4, 8, 8, 8, 8, 4, 8}},
+
+  {"big32_8", 1, {1, 2, 4, 4, 8, 4, 4, 4, 8},
+   {1, 2, 4, 4, 8, 4, 4, 4, 8}},
+
+  {"big32_8_4", 1, {1, 2, 4, 4, 8, 4, 4, 4, 8}, /* AIX */
+   {1, 2, 4, 4, 8, 4, 4, 4, 4}},
+
+  {"big32_4", 1, {1, 2, 4, 4, 8, 4, 4, 4, 8},   /* G5 */
+   {1, 2, 4, 4, 4, 4, 4, 4, 4}},
+
+  {"big32_2", 1, {1, 2, 4, 4, 8, 4, 4, 4, 8},   /* ARM */
+   {1, 2, 2, 2, 2, 2, 2, 2, 2}},
+
+  {"big64", 1, {1, 2, 4, 8, 8, 8, 8, 4, 8},     /* sparc */
+   {1, 2, 4, 8, 8, 8, 8, 4, 8}},
+
+  {"big64_8_4", 1, {1, 2, 4, 8, 8, 8, 8, 4, 8}, /* aix with -maix64 */
+   {1, 2, 4, 8, 8, 8, 8, 4, 4}}
 };
 
-const char *gras_datadesc_arch_name(int code) {
-   if (code < 0 || code > gras_arch_count)
-     return "[arch code out of bound]";
-   return gras_arches[code].name;
+const char *gras_datadesc_arch_name(int code)
+{
+  if (code < 0 || code >= gras_arch_count)
+    return "[unknown arch]";
+  return gras_arches[code].name;
 }
 
+
+/**
+ * Local function doing the grunt work
+ */
+static void gras_dd_reverse_bytes(void *to, const void *from,
+                                  size_t length);
+
 /**
  * gras_dd_convert_elm:
  *
@@ -32,23 +96,171 @@ const char *gras_datadesc_arch_name(int code) {
  * The data to be converted is stored in @src, and is to be stored in @dst.
  * Both pointers may be the same location if no resizing is needed.
  */
-gras_error_t
-gras_dd_convert_elm(gras_datadesc_type_t *type,
-		    int r_arch, 
-		    void *src, void *dst) {
+void
+gras_dd_convert_elm(gras_datadesc_type_t type, int count,
+                    int r_arch, void *src, void *dst)
+{
+  gras_dd_cat_scalar_t scal = type->category.scalar_data;
+  int cpt;
+  const void *r_data;
+  void *l_data;
+  unsigned long r_size, l_size;
+  /* Hexadecimal displayer
+     union {
+     char c[sizeof(int)];
+     int i;
+     } tester;
+   */
+
+  xbt_assert(type->category_code == e_gras_datadesc_type_cat_scalar);
+  xbt_assert(r_arch != GRAS_THISARCH);
 
-  if (r_arch != GRAS_THISARCH) 
-    RAISE_UNIMPLEMENTED;
+  r_size = type->size[r_arch];
+  l_size = type->size[GRAS_THISARCH];
+  XBT_DEBUG("r_size=%lu l_size=%lu,    src=%p dst=%p", r_size, l_size, src,
+         dst);
 
-  return no_error;
+  XBT_DEBUG("remote=%c local=%c", gras_arches[r_arch].endian ? 'B' : 'l',
+         gras_arches[GRAS_THISARCH].endian ? 'B' : 'l');
+
+  if (r_size != l_size) {
+    for (cpt = 0, r_data = src, l_data = dst;
+         cpt < count;
+         cpt++,
+         r_data = (char *) r_data + r_size,
+         l_data = (char *) l_data + l_size) {
+
+      /*
+         fprintf(stderr,"r_data=");
+         for (cpt=0; cpt<r_size; cpt++) {
+         tester.i=0;
+         tester.c[0]= ((char*)r_data)[cpt];
+         fprintf(stderr,"\\%02x", tester.i);
+         }
+         fprintf(stderr,"\n");
+       */
+
+      /* Resize that damn integer, pal */
+
+      unsigned char *l_sign, *r_sign;
+      int padding;
+      int sizeChange = l_size - r_size;
+      int lowOrderFirst = !gras_arches[r_arch].endian ||
+          gras_arches[r_arch].endian == gras_arches[GRAS_THISARCH].endian;
+
+      XBT_DEBUG("Resize integer %d from %lu @%p to %lu @%p",
+             cpt, r_size, r_data, l_size, l_data);
+      xbt_assert(r_data != l_data, "Impossible to resize in place");
+
+      if (sizeChange < 0) {
+        XBT_DEBUG("Truncate %d bytes (%s,%s)", -sizeChange,
+               lowOrderFirst ? "lowOrderFirst" : "bigOrderFirst",
+               scal.encoding ==
+               e_gras_dd_scalar_encoding_sint ? "signed" : "unsigned");
+        /* Truncate high-order bytes. */
+        memcpy(l_data,
+               gras_arches[r_arch].endian ? ((char *) r_data - sizeChange)
+               : r_data, l_size);
+
+        if (scal.encoding == e_gras_dd_scalar_encoding_sint) {
+          XBT_DEBUG("This is signed");
+          /* Make sure the high order bit of r_data and l_data are the same */
+          l_sign = gras_arches[GRAS_THISARCH].endian
+              ? ((unsigned char *) l_data + l_size - 1)
+              : (unsigned char *) l_data;
+          r_sign = gras_arches[r_arch].endian
+              ? ((unsigned char *) r_data + r_size - 1)
+              : (unsigned char *) r_data;
+          XBT_DEBUG("This is signed (r_sign=%c l_sign=%c", *r_sign, *l_sign);
+
+          if ((*r_sign > 127) != (*l_sign > 127)) {
+            if (*r_sign > 127)
+              *l_sign += 128;
+            else
+              *l_sign -= 128;
+          }
+        }
+      } else {
+        XBT_DEBUG("Extend %d bytes", sizeChange);
+        if (scal.encoding != e_gras_dd_scalar_encoding_sint) {
+          XBT_DEBUG("This is signed");
+          padding = 0;          /* pad unsigned with 0 */
+        } else {
+          /* extend sign */
+          r_sign =
+              gras_arches[r_arch].endian ? ((unsigned char *) r_data +
+                                            r_size - 1)
+              : (unsigned char *) r_data;
+          padding = (*r_sign > 127) ? 0xff : 0;
+        }
+
+        memset(l_data, padding, l_size);
+        memcpy(!gras_arches[r_arch].endian ? l_data
+               : ((char *) l_data + sizeChange), r_data, r_size);
+
+        /*
+           fprintf(stderr,"r_data=");
+           for (cpt=0; cpt<r_size; cpt++) {
+           tester.i=0;
+           tester.c[0] = ((char*)r_data)[cpt];
+           fprintf(stderr,"\\%02x", tester.i);
+           }
+           fprintf(stderr,"\n");
+
+           fprintf(stderr,"l_data=");
+           for (cpt=0; cpt<l_size; cpt++) {
+           tester.i=0;
+           tester.c[0]= ((char*)l_data)[cpt];
+           fprintf(stderr,"\\%02x", tester.i);
+           } fprintf(stderr,"\n");
+         */
+      }
+    }
+  }
+
+  /* flip bytes if needed */
+  if (gras_arches[r_arch].endian != gras_arches[GRAS_THISARCH].endian &&
+      (l_size * count) > 1) {
+
+    for (cpt = 0, r_data = dst, l_data = dst; cpt < count; cpt++, r_data = (char *) r_data + l_size,    /* resizing already done */
+         l_data = (char *) l_data + l_size) {
+
+      XBT_DEBUG("Flip elm %d", cpt);
+      gras_dd_reverse_bytes(l_data, r_data, l_size);
+    }
+  }
+
+}
+
+static void gras_dd_reverse_bytes(void *to, const void *from,
+                                  size_t length)
+{
+
+  char charBegin;
+  const char *fromBegin;
+  const char *fromEnd;
+  char *toBegin;
+  char *toEnd;
+
+  for (fromBegin = (const char *) from,
+       fromEnd = fromBegin + length - 1,
+       toBegin = (char *) to,
+       toEnd = toBegin + length - 1;
+       fromBegin <= fromEnd; fromBegin++, fromEnd--, toBegin++, toEnd--) {
+
+    charBegin = *fromBegin;
+    *toBegin = *fromEnd;
+    *toEnd = charBegin;
+  }
 }
 
+
 /**
  * gras_arch_selfid:
  *
  * returns the ID of the architecture the process is running on
  */
-int
-gras_arch_selfid(void) {
+int gras_arch_selfid(void)
+{
   return GRAS_THISARCH;
 }