testgen-ADD-SUB initial untested

wally-pipelined/testgen/testgen-ADD-SUB.py

@@ -1,38 +1,124 @@
+#!/usr/bin/python3
+##################################
 # testgen-ADD-SUB.py
 #
 # David_Harris@hmc.edu 19 January 2021
 #
 # Generate directed and random test vectors for RISC-V Design Validation.
+##################################
 
+##################################
 # libraries
-#import bitstream as bs
+##################################
+from datetime import datetime
+from random import randint 
+from random import seed
+from random import getrandbits
 
-#corners = [0, 1, 2, 0xFF, 0x624B3E97CC52DD14, 0x7FFFFFFFFFFFFFFE, 0x7FFFFFFFFFFFFFFF, 
+##################################
-#           0x8000000000000000, 0x8000000000000001, 0xC365DDEB9173AB42, 0xFFFFFFFFFFFFFFFE, 0xFFFFFFFFFFFFFFFF]
+# functions
-corners = [0, 1, 2, 255]
+##################################
 
-testname = "ADD-SUB"
+def computeExpected(a, b, test):
-fname = "WALLY-" + testname
+  if (test == "ADD"):
-testnum = 0;
+    return a + b
+  elif (test == "SUB"):
+    return a - b
+  else:
+    die("bad test name ", test)
+  #  exit(1)
 
+def randRegs():
+  reg1 = randint(1,32)
+  reg2 = randint(1,32)
+  reg3 = randint(1,32) 
+  if (reg1 == 6 or reg2 == 6 or reg3 == 6 or reg1 == reg2):
+    return randRegs()
+  else:
+      return reg1, reg2, reg3
 
+def writeVector(a,b):
+  global testnum
+  expected = computeExpected(a, b, test)
+  expected = expected % 2**xlen # drop carry if necessary
+  if (expected < 0): # take twos complement
+    expected = 2**xlen + expected
+  reg1, reg2, reg3 = randRegs()
+  lines = "\n# Testcase " + str(testnum) + ":  rs1:x" + str(reg1) + "(" + formatstr.format(a)
+  lines = lines + "), rs2:x" + str(reg2) + "(" +formatstr.format(b) 
+  lines = lines + "), result rd:x" + str(reg3) + "(" + formatstr.format(expected) +")\n"
+  lines = lines + "li x" + str(reg1) + ", MASK_XLEN(" + formatstr.format(a) + ")\n"
+  lines = lines + "li x" + str(reg2) + ", MASK_XLEN(" + formatstr.format(b) + ")\n"
+  lines = lines + test + " x" + str(reg3) + ", x" + str(reg1) + ", x" + str(reg2) + "\n"
+  lines = lines + "sd x" + str(reg3) + ", " + str(8*testnum) + "(x6)\n"
+  lines = lines + "RVTEST_IO_ASSERT_GPR_EQ(x7, " + str(reg3) +", "+formatstr.format(expected)+")\n"
+  f.write(lines)
+  line = formatstr.format(expected)+"\n"
+  r.write(line)
+  testnum = testnum+1
 
+##################################
+# main body
+##################################
 
+# change these to suite your tests
+tests = ["ADD", "SUB"]
+author = "David_Harris@hmc.edu & Katherine Parry"
+xlens = [32, 64]
+numrand = 100;
 
-    # Testcase 0:  rs1:x31(0x10fd3dedadea5195), rs2:x16(0xdf7f3844121bcc23), result rd:x1(0xf07c7631c0061db8)
+# setup
- #   li  x16, MASK_XLEN(0xdf7f3844121bcc23)
+seed(0) # make tests reproducible
-    #li  x31, MASK_XLEN(0x10fd3dedadea5195)
-  #  add x1, x31, x16
-   # sd x1, 0(x6)
-    #RVTEST_IO_ASSERT_GPR_EQ(x7, x1, 0xf07c7631c0061db8) 
 
+# generate files for each test
+for xlen in xlens:
+  formatstrlen = str(int(xlen/4))
+  formatstr = "0x{:0" + formatstrlen + "x}" # format as xlen-bit hexadecimal number
+  for test in tests:
+    corners = [0, 1, 2, 0xFF, 0x624B3E976C52DD14 % 2**xlen, 2**(xlen-1)-2, 2**(xlen-1)-1, 
+            2**(xlen-1), 2**(xlen-1)+1, 0xC365DDEB9173AB42 % 2**xlen, 2**(xlen)-2, 2**(xlen)-1]
+    imperaspath = "../../imperas-riscv-tests/riscv-test-suite/rv" + str(xlen) + "i/"
+    basename = "WALLY-" + test 
+    fname = imperaspath + "src/" + basename + ".S"
+    refname = imperaspath + "references/" + basename + ".reference_output"
+    testnum = 0
 
-f = open(fname, "w")
+    # print custom header part
-for a in corners:
+    f = open(fname, "w")
-  for b in corners:
+    r = open(refname, "w")
-    tc = "# Testcase " + str(testnum
+    line = "///////////////////////////////////////////\n"
-    f.write(tc)
-    line = "li x1, MASK_XLEN(" + str(a) + ")"
     f.write(line)
-    testnum = testnum+1
+    lines="// "+fname+ "\n// " + author + "\n"
-f.close()
+    f.write(lines)
+    line ="// Created " + str(datetime.now()) 
+    f.write(line)
+
+    # insert generic header
+    h = open("testgen_header.S", "r")
+    for line in h:  
+      f.write(line)
+
+    # print directed and random test vectors
+    for a in corners:
+      for b in corners:
+        writeVector(a, b)
+    for i in range(0,numrand):
+      a = getrandbits(xlen)
+      b = getrandbits(xlen)
+      writeVector(a, b)
+
+
+    # print footer
+    h = open("testgen_footer.S", "r")
+    for line in h:  
+      f.write(line)
+
+    # Finish
+    line = ".fill " + str(testnum) + ", 8, -1\n"
+    f.write(line)
+    f.close()
+    r.close()
+
+
+
+

wally-pipelined/testgen/testgen_footer.S

@@ -0,0 +1,18 @@
+	# ---------------------------------------------------------------------------------------------
+	
+	RVTEST_IO_WRITE_STR(x31, "Test End\n")
+
+	# ---------------------------------------------------------------------------------------------
+
+	RV_COMPLIANCE_HALT
+
+RV_COMPLIANCE_CODE_END
+
+# Input data section.
+	.data
+
+
+# Output data section.
+RV_COMPLIANCE_DATA_BEGIN
+
+test_1_res:

wally-pipelined/testgen/testgen_header.S

@@ -1,6 +1,6 @@
-
 //
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
+// Adapted from Imperas RISCV-TEST_SUITE
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
 // files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, 
@@ -30,8 +30,9 @@ RV_COMPLIANCE_CODE_BEGIN
 
 	# ---------------------------------------------------------------------------------------------
 
-	RVTEST_IO_WRITE_STR(x31, "# Test group 1\n")
+	#RVTEST_IO_WRITE_STR(x31, "# Test group 1\n")
 
 
     # address for test results
     la x6, test_1_res
+