X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=stack.asm;h=5b6910b5cb3bef019f7e10336ca62a4e05194042;hb=42844a6fe395162a374bd7bb6e8ed9a04b8d580c;hp=91be19d71963d217ee453051f14abdc80cc9d2b2;hpb=dd99a1e5f8fb8209ce62d714b5d6bc30a7492a09;p=rrq%2Frrqforth.git

diff --git a/stack.asm b/stack.asm
index 91be19d..5b6910b 100644
--- a/stack.asm
+++ b/stack.asm
@@ -1,5 +1,14 @@
 ;;; Words for stack manipulations
 	
+	WORD p_depth,'DEPTH',fasm
+	;; ( -- v )
+	;; Push stack depth (before push)
+	lea rax,[DS_TOP]
+	sub rax,rsp
+	shr rax,3
+	push rax
+	next
+
 	WORD p_dup, 'DUP',fasm
 	;; ( v -- v v )
 	;; Duplicate top ov stack value.
@@ -110,9 +119,9 @@ p_roll_eq:
 	push qword [rsp+rax]
 	next
 
-	WORD w6.2.2300, 'TUCK',fasm
+	WORD p_tuck, 'TUCK',fasm
 	;; ( x1 x2 -- x2 x1 x2 )
-	;; insert the top stack value into below second stack value.
+	;; copy the top stack value into below second stack value.
 	pop rax
 	pop rbx
 	push rax
@@ -123,7 +132,7 @@ p_roll_eq:
 ;;; ========================================
 ;;; Return stack operations
 
-	WORD p_ltR, '>R',fasm
+	WORD p_gtR, '>R',fasm
 	;; ( x -- ) ( R: -- x )
 	;; Move x to the return stack.
 	pop rax
@@ -142,3 +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