From 2ebb3a32d4afa367712f0291b2ca517cba711529 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Tue, 27 Mar 2018 19:58:55 -0700
Subject: vm/asm: new prof instruction.

* share/txr/stdlib/asm.tl (prof): New opcode.
(op-prof): New opcode class.

* vm.c (vm_prof_callback, vm_prof): New static functions.
(vm_execute): Handle PROF opcode via vm_prof.

* vmop.h: Regenerated.
---
 vm.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'vm.c')

diff --git a/vm.c b/vm.c
index cc1df792..e5489c2c 100644
--- a/vm.c
+++ b/vm.c
@@ -332,6 +332,19 @@ static void vm_do_frame(struct vm *vm, vm_word_t insn, int capturable)
   vm->lev = lev - 1;
 }
 
+static val vm_prof_callback(mem_t *ctx)
+{
+  struct vm *vm = coerce(struct vm *, ctx);
+  return vm_execute(vm);
+}
+
+static void vm_prof(struct vm *vm, vm_word_t insn)
+{
+  unsigned dest = vm_insn_operand(insn);
+  val result = prof_call(vm_prof_callback, coerce(mem_t *, vm));
+  vm_set(vm->dspl, dest, result);
+}
+
 static void vm_frame(struct vm *vm, vm_word_t insn)
 {
   vm_do_frame(vm, insn, 1);
@@ -822,6 +835,9 @@ static val vm_execute(struct vm *vm)
       return vm_end(vm, insn);
     case FIN:
       return vm_fin(vm, insn);
+    case PROF:
+      vm_prof(vm, insn);
+      break;
     case CALL:
       vm_call(vm, insn);
       break;
-- 
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