oracle test

mipsevm/README

@@ -2,6 +2,7 @@ Running MIPS processor on chain
 
 Tests from https://github.com/grantae/OpenMIPS/tree/master/software/test/macro/tests
 Licensed GPLv3
+Requires https://github.com/sergev/LiteBSD/releases/download/tools/gcc-4.8.1-mips-macosx.tgz to build
 
 Instruction set used by minigeth, 55 instructions:
 ['addi', 'addiu', 'addu', 'and', 'andi',

mipsevm/test/oracle.asm

+    .section .test, "x"
+    .balign 4
+    .set    noreorder
+    .global test
+    .ent    test
+
+# load hash at 0x30001000
+# 0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad = "hello world"
+test:
+  lui $s0, 0x3000
+  ori $s0, 0x1000
+  li $t0, 0x4717
+  sh $t0, 0($s0)
+  li $t0, 0x3285
+  sh $t0, 1($s0)
+
+# length at 0x31000000
+  lui $s1, 0x3100
+  lw $s1, 0($t0)
+
+# should be 9
+  li $t4, 9
+  subu $t5, $t0, $t4
+  sltiu $v0, $t5, 1 
+
+# data at 0x31000004
+
+# save results
+  lui     $s0, 0xbfff         # Load the base address 0xbffffff0
+  ori     $s0, 0xfff0
+  ori     $s1, $0, 1          # Prepare the 'done' status
+
+  sw      $v0, 8($s0)         # Set the test result
+  sw      $s1, 4($s0)         # Set 'done'
+
+$done:
+  jr      $ra
+  nop
+
+  .end test