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add1 and sub1 instructions

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* libguile/vm-i-scheme.c: Add add1 and sub1 instructions.
* module/language/tree-il/compile-glil.scm: Compile 1+ and 1- to add1
  and sub1.

* module/language/tree-il/primitives.scm (define-primitive-expander):
  Add support for `if' statements in the consequent.
  (+, -): Compile (- x 1), (+ x 1), and (+ 1 x) to 1- or 1+ as
  appropriate.
  (1-): Remove this one. Seems we forgot 1+ before, but we weren't
  compiling it nicely anyway.

* test-suite/tests/tree-il.test ("void"): Fix expected compilation of (+
  (void) 1) to allow for add1.
This commit is contained in:
Andy Wingo 2009-08-05 11:55:42 +02:00
parent f4863880f5
commit 7382f23e58
4 changed files with 52 additions and 6 deletions
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26
libguile/vm-i-scheme.c
View file

@ -215,11 +215,37 @@ VM_DEFINE_FUNCTION (120, add, "add", 2)
FUNC2 (+, scm_sum);
}
VM_DEFINE_FUNCTION (167, add1, "add1", 1)
{
ARGS1 (x);
if (SCM_I_INUMP (x))
{
scm_t_int64 n = SCM_I_INUM (x) + 1;
if (SCM_FIXABLE (n))
RETURN (SCM_I_MAKINUM (n));
}
SYNC_REGISTER ();
RETURN (scm_sum (x, SCM_I_MAKINUM (1)));
}
VM_DEFINE_FUNCTION (121, sub, "sub", 2)
{
FUNC2 (-, scm_difference);
}
VM_DEFINE_FUNCTION (168, sub1, "sub1", 1)
{
ARGS1 (x);
if (SCM_I_INUMP (x))
{
scm_t_int64 n = SCM_I_INUM (x) - 1;
if (SCM_FIXABLE (n))
RETURN (SCM_I_MAKINUM (n));
}
SYNC_REGISTER ();
RETURN (scm_difference (x, SCM_I_MAKINUM (1)));
}
VM_DEFINE_FUNCTION (122, mul, "mul", 2)
{
ARGS2 (x, y);