This patch adds little-endian mode support to PPC emulation.

This is needed by OS/2 and Windows NT and some programs like VirtualPC.
This patch has been tested using OS/2 bootloader (thanks to Tero
Kaarlela).
(Jocelyn Mayer)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1379 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 49 insertions, 0 deletions

diff --git a/target-ppc/op_helper_mem.h b/target-ppc/op_helper_mem.h
index 85ac91163c..fa7f076762 100644
--- a/target-ppc/op_helper_mem.h
+++ b/target-ppc/op_helper_mem.h
@@ -40,4 +40,53 @@ void glue(do_stsw, MEMSUFFIX) (int src)
     }
 }
 
+void glue(do_lsw_le, MEMSUFFIX) (int dst)
+{
+    uint32_t tmp;
+    int sh;
+
+    if (loglevel > 0) {
+        fprintf(logfile, "%s: addr=0x%08x count=%d reg=%d\n",
+                __func__, T0, T1, dst);
+    }
+    for (; T1 > 3; T1 -= 4, T0 += 4) {
+        tmp = glue(ldl, MEMSUFFIX)(T0);
+        ugpr(dst++) = ((tmp & 0xFF000000) >> 24) | ((tmp & 0x00FF0000) >> 8) |
+            ((tmp & 0x0000FF00) << 8) | ((tmp & 0x000000FF) << 24);
+        if (dst == 32)
+            dst = 0;
+    }
+    if (T1 > 0) {
+        tmp = 0;
+        for (sh = 0; T1 > 0; T1--, T0++, sh += 8) {
+            tmp |= glue(ldub, MEMSUFFIX)(T0) << sh;
+        }
+        ugpr(dst) = tmp;
+    }
+}
+
+void glue(do_stsw_le, MEMSUFFIX) (int src)
+{
+    uint32_t tmp;
+    int sh;
+
+    if (loglevel > 0) {
+        fprintf(logfile, "%s: addr=0x%08x count=%d reg=%d\n",
+                __func__, T0, T1, src);
+    }
+    for (; T1 > 3; T1 -= 4, T0 += 4) {
+        tmp = ((ugpr(src++) & 0xFF000000) >> 24);
+        tmp |= ((ugpr(src++) & 0x00FF0000) >> 8);
+        tmp |= ((ugpr(src++) & 0x0000FF00) << 8);
+        tmp |= ((ugpr(src++) & 0x000000FF) << 24);
+        glue(stl, MEMSUFFIX)(T0, tmp);
+        if (src == 32)
+            src = 0;
+    }
+    if (T1 > 0) {
+        for (sh = 0; T1 > 0; T1--, T0++, sh += 8)
+            glue(stb, MEMSUFFIX)(T0, (ugpr(src) >> sh) & 0xFF);
+    }
+}
+
 #undef MEMSUFFIX