more and better documentation and some reorganisation

[rrq/rrqforth.git] / stack.asm

diff --git a/stack.asm b/stack.asm
index d86727680763c9e93b6c691a361b3657baeb4e88..5b6910b5cb3bef019f7e10336ca62a4e05194042 100644 (file)
--- a/stack.asm
+++ b/stack.asm
@@ -151,3 +151,12 @@ p_roll_eq:
        ;; Copy x from the return stack to the data stack.
        push qword [rbp]
        next
+
+       WORD p_rsp,'R[n]',fasm
+       ;; ( n -- a )
+       ;; push the address of the n:th cell on the return stack
+       mov rax,qword [rsp]
+       shl rax,3
+       add rax,rbp
+       mov qword [rsp],rax
+       next