Index: regcache.c
===================================================================
RCS file: /cvs/src/src/gdb/regcache.c,v
retrieving revision 1.34
diff -p -r1.34 regcache.c
*** regcache.c	6 Apr 2002 00:02:50 -0000	1.34
--- regcache.c	16 May 2002 15:31:56 -0000
*************** read_register_bytes (int in_start, char 
*** 228,233 ****
--- 228,248 ----
    int regnum;
    char *reg_buf = alloca (MAX_REGISTER_RAW_SIZE);
  
+   if (gdbarch_register_read_p (current_gdbarch)
+       && in_start == 0 && in_len == REGISTER_BYTES) /* OK Use.  */
+     {
+       /* We assume that if the target has set register_read_p() then
+ 	 all the pseuos will be correctly mapped onto raw registers.
+ 	 Therefore, the regcache describes only the registers in the
+ 	 range [0..NUM_REGS) and the code for reading the entire
+ 	 regset becomes much simpler.  */
+ 
+       for (regnum = 0; regnum < NUM_REGS; regnum++)
+ 	regcache_read (regnum, in_buf + REGISTER_BYTE (regnum));
+ 
+       return;
+     }
+ 
    /* See if we are trying to read bytes from out-of-date registers.  If so,
       update just those registers.  */
  
*************** write_register_bytes (int myregstart, ch
*** 397,402 ****
--- 412,432 ----
    int regnum;
  
    target_prepare_to_store ();
+ 
+   if (gdbarch_register_write_p (current_gdbarch)
+       && myregstart == 0 && inlen == REGISTER_BYTES) /* OK Use.  */
+     {
+       /* We assume that if the target has set register_write_p() then
+ 	 all the pseuos will be correctly mapped onto raw registers.
+ 	 Therefore, the regcache describes only the registers in the
+ 	 range [0..NUM_REGS) and the code for restoring things becomes
+ 	 much simpler.  */
+ 
+       for (regnum = 0; regnum < NUM_REGS; regnum++)
+ 	regcache_write (regnum, myaddr + REGISTER_BYTE (regnum));
+ 
+       return;
+     }
  
    /* Scan through the registers updating any that are covered by the
       range myregstart<=>myregend using write_register_gen, which does