X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=cyclone68000.git;a=blobdiff_plain;f=OpAny.cpp;h=64e2bfe5213ff0b9405e9773b40bb0d29c820483;hp=9d45a0107f57f241729e7ea1641bf1947c3eeedd;hb=HEAD;hpb=52ac6b1c8f65fe2477ffc3a7fc63ca8ae9d7e59f

diff --git a/OpAny.cpp b/OpAny.cpp
index 9d45a01..64e2bfe 100644
--- a/OpAny.cpp
+++ b/OpAny.cpp
@@ -112,7 +112,7 @@ void OpEnd(int sea, int tea)
   }
   if (opend_check_interrupt)
   {
-    ot("  blt CycloneEnd\n");
+    ot("  ble CycloneEnd\n");
     ot(";@ CheckInterrupt:\n");
     if (!opend_check_trace)
       ot("  ldr r1,[r7,#0x44]\n");
@@ -126,7 +126,7 @@ void OpEnd(int sea, int tea)
   }
   else
   {
-    ot("  ldrge pc,[r6,r8,asl #2] ;@ Jump to opcode handler\n");
+    ot("  ldrgt pc,[r6,r8,asl #2] ;@ Jump to opcode handler\n");
     ot("  b CycloneEnd\n");
   }
   ot("\n");
@@ -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;