Subversion Repositories scarts

#mach: crisv32

#output: Basic clock cycles, total @: 54\n

#output: Memory source stall cycles: 0\n

#output: Memory read-after-write stall cycles: 0\n

#output: Movem source stall cycles: 0\n

#output: Movem destination stall cycles: 0\n

#output: Movem address stall cycles: 0\n

#output: Multiplication source stall cycles: 0\n

#output: Jump source stall cycles: 0\n

#output: Branch misprediction stall cycles: 18\n

#output: Jump target stall cycles: 0\n

#sim: --cris-cycles=basic

; Check branch penalties.  It is assumed that the taken-counters

; in the bimodal branch-predictors start at 0, meaning two taken

; branches are required for a branch to be predicted as taken

; for each counter, from reset.  None of these branches go

; to the end of a cache-line and none map to the same counter.

 .include "testutils.inc"

 startnostack

 ba 0f          ; No penalty: always-taken condition not "predicted".

 nop

 nop

0:

 setf c

 bcs 0f         ; Penalty 2 cycles.

 nop

 nop

0:

 clearf c

 bcc 0f         ; Penalty 2 cycles, though branch is a nop.

 moveq 4,r0     ; Execute 5 times:

0:

 move.d r0,r0

 bne 0b         ; Mispredicted 3 out of 5 times: penalty 3*2 cycles.

 subq 1,r0

0:

 beq 0f         ; Not taken; no penalty.

 nop

 nop

0:

; (Almost) same insns, but with 16-bit bCC insns.

 ba 0f          ; No penalty: always-taken condition not "predicted".

 nop

 .space 520

0:

 setf c

 bcs 0f         ; Penalty 2 cycles.

 nop

 .space 520

0:

 moveq 4,r0     ; Execute 5 times:

0:

 ba 1f

 move.d r0,r0   ; Mispredicted 3 out of 5 times:

 .space 520

1:

 bne 0b         ; Penalty 3*2 cycles.

 subq 1,r0

 beq 0f         ; Not taken; no penalty.

 nop

0:

 break 15