X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=cyclone68000.git;a=blobdiff_plain;f=OpAny.cpp;h=64e2bfe5213ff0b9405e9773b40bb0d29c820483;hp=63a7e1ff2cadc9fe66ede75e0a181583fa62a052;hb=ee2d42257a2d52072f6b163f8ec279503241e9de;hpb=c204973a7053e21bd3177f82aaab5ebb59f39401

diff --git a/OpAny.cpp b/OpAny.cpp
index 63a7e1f..64e2bfe 100644
--- a/OpAny.cpp
+++ b/OpAny.cpp
@@ -159,6 +159,58 @@ int OpGetFlags(int subtract,int xbit,int specialz)
   return 0;
 }
 
+void OpGetFlagsNZ(int rd)
+{
+  ot("  and r10,r%d,#0x80000000 ;@ r10=N_flag\n",rd);
+  ot("  orreq r10,r10,#0x40000000 ;@ get NZ, clear CV\n");
+}
+
+// size 0=8bit, 1=16bit
+void SignExtend(int rd, int rs, int size)
+{
+  if (size >= 2)
+  {
+    if (rd != rs)
+      ot("  mov r%d,r%d\n", rd, rs);
+    return;
+  }
+#if defined(HAVE_ARMv6) && (HAVE_ARMv6)
+  if (size == 1)
+    ot("  sxth r%d,r%d ;@ sign extend\n", rd, rs);
+  else
+    ot("  sxtb r%d,r%d ;@ sign extend\n", rd, rs);
+#else
+  int shift = size ? 16 : 24;
+  ot("  mov r%d,r%d,asl #%d\n", rd, rs, shift);
+  ot("  mov r%d,r%d,asr #%d ;@ sign extend\n", rd, rd, shift);
+#endif
+}
+
+void ZeroExtend(int rd, int rs, int size)
+{
+  if (size >= 2)
+  {
+    if (rd != rs)
+      ot("  mov r%d,r%d\n", rd, rs);
+    return;
+  }
+#if defined(HAVE_ARMv6) && (HAVE_ARMv6)
+  if (size == 1)
+    ot("  uxth r%d,r%d ;@ zero extend\n", rd, rs);
+  else
+#else
+  if (size == 1)
+  {
+    ot("  mov r%d,r%d,lsl #16\n", rd, rs);
+    ot("  mov r%d,r%d,lsr #16 ;@ zero extend\n", rd, rd);
+  }
+  else
+#endif
+  {
+    ot("  and r%d,r%d,#0xff ;@ zero extend\n", rd, rs);
+  }
+}
+
 // -----------------------------------------------------------------
 
 int g_op;