From 06c141edd77ced26d4dce2efb2cdb747e0bf5a99 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 9 Jan 2024 11:59:45 +0000
Subject: [PATCH] bug 1248: add beginnings of sv.creqv test, see what is going
 on

---
 .../decoder/isa/test_caller_svp64_crops.py    | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 src/openpower/decoder/isa/test_caller_svp64_crops.py

diff --git a/src/openpower/decoder/isa/test_caller_svp64_crops.py b/src/openpower/decoder/isa/test_caller_svp64_crops.py
new file mode 100644
index 00000000..49a60416
--- /dev/null
+++ b/src/openpower/decoder/isa/test_caller_svp64_crops.py
@@ -0,0 +1,116 @@
+"""Implementation of FORTRAN MAXLOC SVP64
+Copyright (C) 2022,2023 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
+Licensed under the LGPLv3+
+Funded by NLnet NGI-ASSURE under EU grant agreement No 957073.
+* https://nlnet.nl/project/Libre-SOC-OpenPOWER-ISA
+* https://bugs.libre-soc.org/show_bug.cgi?id=676
+* https://libre-soc.org/openpower/sv/cookbook/fortran_maxloc/
+"""
+
+import unittest
+from copy import deepcopy
+
+from nmutil.formaltest import FHDLTestCase
+from openpower.decoder.isa.caller import SVP64State
+from openpower.decoder.isa.test_caller import run_tst
+from openpower.decoder.selectable_int import SelectableInt
+from openpower.simulator.program import Program
+from openpower.insndb.asm import SVP64Asm
+from openpower.util import log
+from openpower.decoder.isa.maxloc import m2
+
+
+class CRfield:
+    def __init__(self, value=0):
+        self.lt = (value>>3) & 0b1
+        self.gt = (value>>2) & 0b1
+        self.eq = (value>>1) & 0b1
+    def __repr__(self):
+        return "<lt %d gt %d eq %d>" % (self.lt, self.gt, self.eq)
+    def __int__(self):
+        return (self.lt<<3) | (self.gt<<2) | (self.eq<<1)
+
+
+class CR_Ops_TestCase(FHDLTestCase):
+
+    def _check_regs(self, sim, expected):
+        for i in range(32):
+            self.assertEqual(sim.gpr(i), SelectableInt(expected[i], 64))
+
+    def test_sv_creqv_1(self):
+        self.sv_creqv([0b11,0b100])
+
+    def tst_sv_maxloc_2(self):
+        self.sv_maxloc([3,4,1,5])
+
+    def tst_sv_maxloc_3(self):
+        self.sv_maxloc([2,9,8,0])
+
+    def tst_sv_maxloc_4(self):
+        self.sv_maxloc([2,1,3,0])
+
+    def sv_creqv(self, ra):
+        """
+        """
+
+        lst = SVP64Asm([
+                "sv.creqv *19,*16,*16",
+                        ])
+        lst = list(lst)
+
+        # SVSTATE
+        svstate = SVP64State()
+        vl = 2
+        svstate.vl = vl  # VL
+        svstate.maxvl = vl  # MAXVL
+        print("SVSTATE", bin(svstate.asint()))
+
+        gprs = [0] * 32
+
+        crs = []
+        cr_res = []
+        cr = 0
+        for idx, crf in enumerate(ra):
+            crs .append(CRfield(crf))
+            cr |= crf << ((7-idx)*4)
+        res = deepcopy(gprs)
+
+        #expected_vl, expected_cr = sv_maxu(res, cr_res, vl, 10, 4, 4)
+        #log("sv_maxu", expected_vl, cr_res)
+
+        with Program(lst, bigendian=False) as program:
+            sim = self.run_tst_program(program, initial_regs=gprs,
+                                       initial_cr=cr,
+                                       svstate=svstate)
+            for i in range(8):
+                crf = sim.crl[i].get_range().value
+                log("crf", i, bin(crf))
+
+            # confirm that the results are as expected
+            return
+
+            for i, v in enumerate(cr_res[:vl]):
+                crf = sim.crl[i].get_range().value
+                log("crf", i, res[i], bin(crf), bin(int(v)))
+                self.assertEqual(crf, int(v))
+
+    def run_tst_program(self, prog, initial_regs=None,
+                        svstate=None,
+                        initial_mem=None,
+                        initial_cr=None):
+        if initial_regs is None:
+            initial_regs = [0] * 32
+        simulator = run_tst(prog, initial_regs, mem=initial_mem,
+                            initial_cr=initial_cr,
+                            svstate=svstate)
+
+        print("GPRs")
+        simulator.gpr.dump()
+        print("FPRs")
+        simulator.fpr.dump()
+
+        return simulator
+
+
+if __name__ == "__main__":
+    unittest.main()
-- 
2.30.2