* config/tc-rx.h (md_do_align): New.

[external/binutils.git] / gas / config / tc-rx.c

diff --git a/gas/config/tc-rx.c b/gas/config/tc-rx.c
index 00101e0..50b17ae 100644 (file)
--- a/gas/config/tc-rx.c
+++ b/gas/config/tc-rx.c
@@ -1119,11 +1119,51 @@ md_section_align (segT segment, valueT size)
   return ((size + (1 << align) - 1) & (-1 << align));
 }
 
+                               /* NOP - 1 cycle */
+static unsigned char nop_1[] = { 0x03};
+                               /* MOV.L R0,R0 - 1 cycle */
+static unsigned char nop_2[] = { 0xef, 0x00};
+                               /* MAX R0,R0 - 1 cycle */
+static unsigned char nop_3[] = { 0xfc, 0x13, 0x00 };
+                               /* MUL #1,R0 - 1 cycle */
+static unsigned char nop_4[] = { 0x76, 0x10, 0x01, 0x00 };
+                               /* MUL #1,R0 - 1 cycle */
+static unsigned char nop_5[] = { 0x77, 0x10, 0x01, 0x00, 0x00 };
+                               /* MUL #1,R0 - 1 cycle */
+static unsigned char nop_6[] = { 0x74, 0x10, 0x01, 0x00, 0x00, 0x00 };
+                               /* BRA.S .+7 - 1 cycle */
+static unsigned char nop_7[] = { 0x0F, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03 };
+
+static unsigned char *nops[] = { NULL, nop_1, nop_2, nop_3, nop_4, nop_5, nop_6, nop_7 };
+#define BIGGEST_NOP 7
+
 /* When relaxing, we need to output a reloc for any .align directive
    so that we can retain this alignment as we adjust opcode sizes.  */
 void
 rx_handle_align (fragS * frag)
 {
+  if ((frag->fr_type == rs_align
+       || frag->fr_type == rs_align_code)
+      && subseg_text_p (now_seg))
+    {
+      int count = (frag->fr_next->fr_address
+                  - frag->fr_address   
+                  - frag->fr_fix);
+      unsigned char *base = (unsigned char *)frag->fr_literal + frag->fr_fix;
+
+      if (count > BIGGEST_NOP)
+       {
+         base[0] = 0x2e;
+         base[1] = count;
+         frag->fr_var = 2;
+       }
+      else if (count > 0)
+       {
+         memcpy (base, nops[count], count);
+         frag->fr_var = count;
+       }
+    }
+
   if (linkrelax
       && (frag->fr_type == rs_align
          || frag->fr_type == rs_align_code)