diff options
Diffstat (limited to 'design/stack_machine.v')
| -rw-r--r-- | design/stack_machine.v | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/design/stack_machine.v b/design/stack_machine.v index 5e6e0d6..b5c56e6 100644 --- a/design/stack_machine.v +++ b/design/stack_machine.v @@ -201,6 +201,10 @@ module stack_machine_new assign instr_jump = use_im && stack_same_size && instruction[11:7] == 5'd1; + wire instr_add_sp; + assign instr_add_sp = use_im && stack_same_size && + instruction[11:7] == 5'd2; + /* Instructions, that grow stack */ wire instr_tee; assign instr_tee = !set_im && !use_im && stack_grows && @@ -533,6 +537,9 @@ module stack_machine_new if (instr_set_sp) `SET_SP(im_effective); + if (instr_add_sp) + `SET_SP(im_effective + sp); + if (instr_jump) `SET_PC(im_effective); |