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Diffstat (limited to 'readme.md')
| -rw-r--r-- | readme.md | 31 |
1 files changed, 31 insertions, 0 deletions
@@ -38,6 +38,10 @@ start compilation of the word 'name'. ### `; ( -- ) IMMEDIATE` end compilation of the currently compiling word. +### `-rot ( u1 u2 u3 -- u3 u1 u2 )` +rotate the three topmost values on the stack so that the topmost value +is moved to the third highest. + ### `>body ( xt -- a )` yield the code field of xt. @@ -45,6 +49,15 @@ yield the code field of xt. variable containing the index of the first unparsed character in the input buffer. +### `>r ( u -- ) ( R: -- u )` +move a value from the working stack to the return stack. + +### `2drop ( u1 u2 -- )` +remove the two topmost values from the stack. + +### `2dup ( u1 u2 -- u1 u2 u1 u2 )` +duplicate the two topmost values on the stack. + ### `brk@ ( -- a )` yields current program break. @@ -60,6 +73,9 @@ a variable that contains the first byte of user memory. ### `dp$ ( -- )` a variable that contains the last available byte of user memory. +### `drop ( u -- )` +remove the value at the top of the stack. + ### `dup ( u -- u u )` duplicate the value at the top of the stack. @@ -110,6 +126,15 @@ and return as a string. tabs (ascii 0x09), newlines (ascii 0x10), and spaces (ascii 0x20) are considered whitespace. +### `r> ( -- u ) ( R: u -- )` +move a value from the return stack to the working stack. + +### `rdrop ( R: u -- )` +remove the value at the top of the return stack. + +### `rot ( u1 u2 u3 -- u2 u3 u1 )` +rotate the top three values on the stack so that the third highest value is moved to the top. + ### `smudge ( -- )` toggles the smudge bit on the xt in latest. @@ -118,6 +143,9 @@ a variable containing a boolean value. if 0 (false), the system is in interpreting mode, if -1 (true), the system is in compiling mode. +### `swap ( u1 u2 -- u2 u1 )` +swap the two topmost values on the stack. + ### `syscall0 ( rax -- u )` perform the syscall with the id in `rax`, and push the value of the `rax` register to the stack. @@ -143,6 +171,9 @@ a variable containing the address of the current input buffer. ### `type ( a u -- )` write u characters at a to output. +### `over ( u1 u2 -- u1 u2 u1 )` +copy the second-highest value on the stack and move it to the top of the stack. + ## dictionary format note that the string length of one byte limits a word's name to 255 characters. |