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# Blackfin testcase for factorial
# mach: bfin
.include "testutils.inc"
start
.macro factorial num:req answer:req
R0 = \num (Z);
CALL _fact;
imm32 r1, \answer;
CC = R1 == R0;
if CC JUMP 1f;
fail
1:
.endm
_test:
factorial 1 1
factorial 2 2
factorial 3 6
factorial 4 24
factorial 5 120
factorial 6 720
factorial 7 5040
factorial 8 40320
factorial 9 362880
factorial 10 3628800
factorial 11 39916800
factorial 12 479001600
# This is the real answer, but it overflows 32bits. Since gas itself
# likes to choke on 64bit values when compiled for 32bit systems, just
# specify the truncated 32bit value since that's what the Blackfin will
# come up with too.
# factorial 13 6227020800
factorial 13 1932053504
pass
_fact:
LINK 0;
[ -- SP ] = R7;
CC = R0 < 2;
IF CC JUMP 1f;
R7 = R0;
R0 += -1;
CALL _fact;
R0 *= R7;
1:
R7 = [ SP ++ ];
UNLINK;
RTS;
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