From f68163994a6428fe8d59708e5f9577d757ef0402 Mon Sep 17 00:00:00 2001 From: Luke Kenneth Casson Leighton Date: Sun, 16 Oct 2022 11:30:06 +0100 Subject: [PATCH] add unit test showing two svindex calls, found bugs, needs resolving in ISACaller. REMAP application to RA/B/C/T/S is not properly routing --- .../decoder/isa/test_caller_svindex.py | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) diff --git a/src/openpower/decoder/isa/test_caller_svindex.py b/src/openpower/decoder/isa/test_caller_svindex.py index ff4ec0bc..134e803f 100644 --- a/src/openpower/decoder/isa/test_caller_svindex.py +++ b/src/openpower/decoder/isa/test_caller_svindex.py @@ -35,6 +35,10 @@ def set_masked_reg(regs, base, offs, ew_bits, value): val |= value << (gpr_col*ew_bits) regs[base+gpr_offs] = val +def rotl32(v, c): + c = c & 0x1f + return ((v << c) & 0xffffffff) | v >> (32 - c) + class SVSTATETestCase(FHDLTestCase): @@ -450,6 +454,91 @@ class SVSTATETestCase(FHDLTestCase): self.assertEqual(shape.svgpr, 0) self._check_regs(sim, expected_regs) + def test_1_sv_index_rot32(self): + """sets VL=8 (via SVSTATE) then does modulo 4 svindex, and a rotate. + + RA is re-mapped via Indexing, + RB is re-mapped via different Indexing, + """ + isa = SVP64Asm([ + 'svindex 14, 5, 4, 3, 0, 1, 0', # SVSHAPE1, RB, mod 4 + 'svindex 12, 8, 1, 3, 0, 1, 0', # SVSHAPE0, RS + 'sv.rlwnm *8, *0, *16, 0, 31', + ]) + lst = list(isa) + print ("listing", lst) + + # initial values in GPR regfile + initial_regs = [0] * 128 + idxs = [1, 0, 5, 2, 4, 3, 7, 6] # random enough + for i in range(8): + set_masked_reg(initial_regs, 24, i, ew_bits=8, value=idxs[i]) + initial_regs[i] = i + shifts = [16, 12, 8, 7] # chacha20 shifts + idxs2 = [1, 2, 3, 0] # cycle order (for fun) + for i in range(4): + set_masked_reg(initial_regs, 28, i, ew_bits=8, value=idxs2[i]) + initial_regs[16+i] = shifts[i] + + # SVSTATE vl=10 + svstate = SVP64State() + svstate.vl = 8 # VL + svstate.maxvl = 8 # MAXVL + print ("SVSTATE", bin(svstate.asint())) + + # copy before running, compute expected results + expected_regs = deepcopy(initial_regs) + for i in range(8): + RS = initial_regs[0+idxs[i%8]] + RB = initial_regs[16+idxs2[i%4]] + expected_regs[i+8] = rotl32(RS, RB) + + with Program(lst, bigendian=False) as program: + sim = self.run_tst_program(program, initial_regs, svstate=svstate) + + # print out expected regs + for i in range(8): + RS = initial_regs[0+idxs[i%8]] + RB = initial_regs[16+idxs2[i%4]] + print ("expected", i, hex(RS), hex(RB), hex(expected_regs[i+8])) + + print (sim.spr) + SVSHAPE0 = sim.spr['SVSHAPE0'] + SVSHAPE1 = sim.spr['SVSHAPE1'] + print ("SVSTATE after", bin(sim.svstate.asint())) + print (" vl", bin(sim.svstate.vl)) + print (" mvl", bin(sim.svstate.maxvl)) + print (" srcstep", bin(sim.svstate.srcstep)) + print (" dststep", bin(sim.svstate.dststep)) + print (" RMpst", bin(sim.svstate.RMpst)) + print (" SVme", bin(sim.svstate.SVme)) + print (" mo0", bin(sim.svstate.mo0)) + print (" mo1", bin(sim.svstate.mo1)) + print (" mi0", bin(sim.svstate.mi0)) + print (" mi1", bin(sim.svstate.mi1)) + print (" mi2", bin(sim.svstate.mi2)) + print ("STATE0svgpr", hex(SVSHAPE0.svgpr)) + print ("STATE0 xdim", SVSHAPE0.xdimsz) + print ("STATE0 ydim", SVSHAPE0.ydimsz) + print ("STATE0 skip", bin(SVSHAPE0.skip)) + print ("STATE0 inv", SVSHAPE0.invxyz) + print ("STATE0order", SVSHAPE0.order) + print (sim.gpr.dump()) + self._check_regs(sim, expected_regs) + self.assertEqual(sim.svstate.RMpst, 1) # mm=1 so persist=1 + self.assertEqual(sim.svstate.SVme, 0b10010) # RS and RB active + # rmm is 0b00001 which means mi0=0 and all others inactive (0) + self.assertEqual(sim.svstate.mi0, 0) # RS + self.assertEqual(sim.svstate.mi1, 1) # RB + self.assertEqual(sim.svstate.mi2, 0) # ignore + self.assertEqual(sim.svstate.mo0, 0) # ignore + self.assertEqual(sim.svstate.mo1, 0) # ignore + self.assertEqual(SVSHAPE0.svgpr, 24) # SVG is shifted up by 1 + self.assertEqual(SVSHAPE1.svgpr, 28) # SVG is shifted up by 1 + for i in range(2,4): + shape = sim.spr['SVSHAPE%d' % i] + self.assertEqual(shape.svgpr, 0) + def run_tst_program(self, prog, initial_regs=None, svstate=None): if initial_regs is None: -- 2.30.2