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Match failure implemented

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This commit is contained in:
Dmitry Boulytchev 2019-12-24 03:59:05 +03:00
parent de2955cbc9
commit 711c8d2f12
5 changed files with 82 additions and 38 deletions
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13
src/X86.ml
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@ -114,7 +114,7 @@ open SM
Take an environment, a stack machine program, and returns a pair --- the updated environment and the list
of x86 instructions
*)
let compile env code =
let compile cmd env code =
(* SM.print_prg code; *)
flush stdout;
let suffix = function
@ -399,6 +399,7 @@ let compile env code =
(if f = "main" then [Call "L__gc_init"] else [])
| END ->
env#assert_empty_stack;
let name = env#fname in
env#leave, [
Label env#epilogue;
@ -414,6 +415,7 @@ let compile env code =
| RET ->
let x, env = env#pop in
env#assert_empty_stack;
env, [Mov (x, eax); Jmp env#epilogue]
| CALL (f, n) -> call env f n
@ -460,7 +462,12 @@ let compile env code =
| Sexp -> ".sexp_tag_patt"
| Closure -> ".closure_tag_patt"
) 1
| FAIL (line, col) ->
let v, env = env#pop in
let s, env = env#string cmd#get_infile in
env, [Push (L col); Push (L line); Push (M ("$" ^ s)); Push v; Call "Bmatch_failure"; Binop ("+", L (3 * word_size), esp)]
| i ->
invalid_arg (Printf.sprintf "invalid SM insn: %s\n" (GT.show(insn) i))
in
@ -651,7 +658,7 @@ class env prg =
*)
let genasm cmd prog =
let sm = SM.compile cmd prog in
let env, code = compile (new env sm) sm in
let env, code = compile cmd (new env sm) sm in
let gc_start, gc_end = "__gc_data_start", "__gc_data_end" in
let globals =
List.map (fun s -> Meta (Printf.sprintf "\t.globl\t%s" s)) ([gc_start; gc_end] @ env#publics)