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Carl Shapiro
cmucl
Commits
284043ee
Commit
284043ee
authored
10 years ago
by
Raymond Toy
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Add support for deriving the type of ROUND. Needs work.
parent
98d3b693
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src/compiler/srctran.lisp
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284043ee
...
@@ -1764,6 +1764,104 @@
...
@@ -1764,6 +1764,104 @@
(
ftruncate-derive-type-quot-aux
n
divisor
nil
))
(
ftruncate-derive-type-quot-aux
n
divisor
nil
))
#'
%unary-ftruncate
)))
#'
%unary-ftruncate
)))
(
defun
round-quotient-bound
(
quot
)
(
flet
((
round-it
(
quot
)
(
let
((
lo
(
interval-low
quot
))
(
hi
(
interval-high
quot
)))
(
setf
lo
(
if
lo
(
round
(
bound-value
lo
))
nil
))
;; For the upper bound, we need to be careful
(
setf
hi
(
if
hi
(
round
(
bound-value
hi
))
nil
))
(
make-interval
:low
lo
:high
hi
))))
(
case
(
interval-range-info
quot
)
(
+
(
round-it
quot
))
(
-
(
round-it
quot
))
(
otherwise
;; Split the interval into positive and negative pieces, compute
;; the result for each piece and put them back together.
(
destructuring-bind
(
neg
pos
)
(
interval-split
0
quot
t
t
)
(
interval-merge-pair
(
round-it
neg
)
(
round-it
pos
)))))))
(
defun
round-derive-type-quot
(
number-type
divisor-type
)
(
let*
((
rem-type
(
rem-result-type
number-type
divisor-type
))
(
number-interval
(
numeric-type->interval
number-type
))
(
divisor-interval
(
numeric-type->interval
divisor-type
)))
(
let
((
quot
(
round-quotient-bound
(
interval-div
number-interval
divisor-interval
))))
(
specifier-type
`
(
integer
,
(
or
(
interval-low
quot
)
'*
)
,
(
or
(
interval-high
quot
)
'*
))))))
(
defun
round-derive-type-rem
(
number-type
divisor-type
)
(
let*
((
rem-type
(
rem-result-type
number-type
divisor-type
))
(
number-interval
(
numeric-type->interval
number-type
))
(
divisor-interval
(
numeric-type->interval
divisor-type
)))
(
multiple-value-bind
(
class
format
)
(
ecase
rem-type
(
integer
(
values
'integer
nil
))
(
rational
(
values
'rational
nil
))
((
or
single-float
double-float
#+
long-float
long-float
#+
double-double
double-double-float
)
(
values
'float
rem-type
))
(
float
(
values
'float
nil
))
(
real
(
values
nil
nil
)))
#+
nil
(
when
(
member
rem-type
'
(
float
single-float
double-float
#+
long-float
long-float
#+
double-double
double-double-float
))
(
setf
rem
(
interval-func
#'
(
lambda
(
x
)
(
coerce
x
rem-type
))
rem
)))
(
make-numeric-type
:class
class
:format
format
:low
nil
:high
nil
))))
(
defun
%unary-round-derive-type-aux
(
num
)
(
if
(
numeric-type-real-p
num
)
(
round-derive-type-quot
num
(
specifier-type
'
(
integer
1
1
)))
*empty-type*
))
(
defoptimizer
(
%unary-round
derive-type
)
((
number
))
(
one-arg-derive-type
number
#'
%unary-round-derive-type-aux
#'
%unary-round
))
(
defun
round-derive-type-quot-aux
(
num
div
same-arg
)
(
declare
(
ignore
same-arg
))
(
if
(
and
(
numeric-type-real-p
num
)
(
numeric-type-real-p
div
))
(
round-derive-type-quot
num
div
)
*empty-type*
))
(
defun
round-derive-type-rem-aux
(
num
div
same-arg
)
(
declare
(
ignore
same-arg
))
(
if
(
and
(
numeric-type-real-p
num
)
(
numeric-type-real-p
div
))
(
round-derive-type-rem
num
div
)
*empty-type*
))
(
defoptimizer
(
round
derive-type
)
((
number
divisor
))
(
let
((
quot
(
two-arg-derive-type
number
divisor
#'
round-derive-type-quot-aux
#'
round
))
(
rem
(
two-arg-derive-type
number
divisor
#'
round-derive-type-rem-aux
#'
(
lambda
(
x
)
(
nth-value
1
(
round
x
))))))
(
when
(
and
quot
rem
)
(
make-values-type
:required
(
list
quot
rem
)))))
;;; Define optimizers for floor and ceiling
;;; Define optimizers for floor and ceiling
(
macrolet
(
macrolet
((
frob-opt
(
name
q-name
r-name
)
((
frob-opt
(
name
q-name
r-name
)
...
...
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