fixed relative memory addressing bug

1 files changed, 78 insertions, 0 deletions

diff --git a/prog/src/prog.s b/prog/src/prog.s
new file mode 100644
index 0000000..ec227a9
--- /dev/null
+++ b/prog/src/prog.s
@@ -0,0 +1,78 @@
+.section .text
+.globl test_prog
+
+
+/*
+  addi t0, zero, 31
+reset_loop:
+  addi t6, zero, 0
+loop:
+  addi t6, t6, 1
+  beq t6, t0, reset_loop
+  j loop
+*/
+
+test_prog:
+  li t0, 0xFFFFFFFF
+  li t1, 0x33333333
+  li t2, 0x88888888
+  li t3, 0x11111111
+
+  add   t4, t1,   t2
+  sub   t4, t1,   t2
+  slt   t4, t3,   t0
+  slt   t4, t0,   t3
+  sltu  t4, t3,   t0
+  sltu  t4, t0,   t3
+  and   t4, zero, zero
+  and   t4, zero, t0
+  and   t4, t0,   t0
+  or    t4, zero, zero
+  or    t4, zero, t0
+  or    t4, t0,   t0
+  xor   t4, zero, zero
+  xor   t4, zero, t0
+  xor   t4, t0,   t0
+  
+  beq   t0, t0, branch_eq
+  j branch_eq_nt
+end:
+  ret
+
+branch_eq_ret:
+  beq   t0, t3, branch_ne
+  j branch_ne_nt
+
+branch_ne_ret:
+  addi sp, sp, -16  # Adjust stack pointer to make space for ra and s0
+  sw ra, 0(sp)      # Save ra to the stack
+  call func
+  lw ra, 0(sp)      # Load ra from the stack
+  addi sp, sp, 16   # Restore stack pointer
+
+  li  t0, 0x00100000 
+  sw  t1, 0(t0)
+  lw  t2, 0(t0)
+
+  j end
+
+
+branch_eq:
+  addi  t5, zero, 1
+  j branch_eq_ret
+
+branch_eq_nt:
+  addi  t5, zero, 2
+  j branch_eq_ret
+
+branch_ne:
+  addi  t5, zero, 3
+  j branch_ne_ret
+
+branch_ne_nt:
+  addi  t5, zero, 4
+  j branch_ne_ret
+
+func:
+  addi  t5, zero, 5
+  ret