[git] CMU Common Lisp branch master updated. snapshot-2014-08-17-ga206017
Raymond Toy
rtoy at common-lisp.net
Fri Aug 22 03:41:23 UTC 2014
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- Log -----------------------------------------------------------------
commit a206017de697d0bd41545b300669138d5d5533ff
Author: Raymond Toy <toy.raymond at gmail.com>
Date: Thu Aug 21 20:41:10 2014 -0700
Make expm1 signal errors using fdlibm_setexception. Update tests to
handle signaling and quite NaN
* src/lisp/s_expm1.c:
* Use fdlibm_setexception
* tests/trig.lisp:
* Add additional tests to existing testsuite to distinguish
signaling and quiet NaN. The functions should signal on quiet
NaN.
* Add tests for expm1.
diff --git a/src/lisp/s_expm1.c b/src/lisp/s_expm1.c
index 7431885..4e9bae8 100644
--- a/src/lisp/s_expm1.c
+++ b/src/lisp/s_expm1.c
@@ -150,10 +150,14 @@ Q5 = -2.01099218183624371326e-07; /* BE8AFDB7 6E09C32D */
if(hx >= 0x40862E42) { /* if |x|>=709.78... */
if(hx>=0x7ff00000) {
if(((hx&0xfffff)|ux.i[LOWORD])!=0)
- return x+x; /* NaN */
- else return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */
+ return fdlibm_setexception(x, FDLIBM_INVALID); /* NaN */
+ else return (xsb==0)? x:-1.0;/* exp(+-inf)={inf,-1} */
}
- if(x > o_threshold) return huge*huge; /* overflow */
+ if(x > o_threshold) {
+ /* overflow */
+ return fdlibm_setexception(x, FDLIBM_OVERFLOW);
+ }
+
}
if(xsb!=0) { /* x < -56*ln2, return -1.0 with inexact */
if(x+tiny<0.0) /* raise inexact */
diff --git a/tests/trig.lisp b/tests/trig.lisp
index 62ac377..07cd6bd 100644
--- a/tests/trig.lisp
+++ b/tests/trig.lisp
@@ -794,10 +794,14 @@
;; Test that fdlibm routines signals exceptions as expected.
-(defparameter *nan*
+(defparameter *qnan*
(kernel::with-float-traps-masked (:invalid)
(* 0 ext:double-float-positive-infinity))
- "Some randon MaN value")
+ "Some randon quiet MaN value")
+
+(defparameter *snan*
+ (kernel:make-double-float #x7ff00000 1)
+ "A randon signaling MaN value")
(define-test cosh.exceptions
(:tag :fdlibm)
@@ -806,7 +810,9 @@
(assert-error 'floating-point-overflow
(kernel:%cosh -1000d0))
(assert-error 'floating-point-invalid-operation
- (kernel:%cosh *nan*))
+ (kernel:%cosh *snan*))
+ (assert-true (ext:float-nan-p (kernel:%cosh *qnan*)))
+
;; Same, but with overflow's masked
(kernel::with-float-traps-masked (:overflow)
(assert-equal ext:double-float-positive-infinity
@@ -819,7 +825,7 @@
(kernel:%cosh ext:double-float-negative-infinity)))
;; Test NaN
(kernel::with-float-traps-masked (:invalid)
- (assert-true (ext:float-nan-p (kernel:%cosh *nan*)))))
+ (assert-true (ext:float-nan-p (kernel:%cosh *snan*)))))
(define-test sinh.exceptions
(:tag :fdlibm)
@@ -828,7 +834,8 @@
(assert-error 'floating-point-overflow
(kernel:%sinh -1000d0))
(assert-error 'floating-point-invalid-operation
- (kernel:%sinh *nan*))
+ (kernel:%sinh *snan*))
+ (assert-true (ext:float-nan-p (kernel:%sinh *qnan*)))
;; Same, but with overflow's masked
(kernel::with-float-traps-masked (:overflow)
(assert-equal ext:double-float-positive-infinity
@@ -841,12 +848,16 @@
(kernel:%sinh ext:double-float-negative-infinity)))
;; Test NaN
(kernel::with-float-traps-masked (:invalid)
- (assert-true (ext:float-nan-p (kernel:%sinh *nan*)))))
+ (assert-true (ext:float-nan-p (kernel:%sinh *qnan*)))))
(define-test tanh.exceptions
(:tag :fdlibm)
- (assert-true (ext:float-nan-p (kernel:%tanh *nan*))))
+ (assert-true (ext:float-nan-p (kernel:%tanh *qnan*)))
+ (assert-error 'floating-point-invalid-operation
+ (kernel:%tanh *snan*))
+ (kernel::with-float-traps-masked (:invalid)
+ (assert-true (ext:float-nan-p (kernel:%tanh *snan*)))))
(define-test acosh.exceptions
(:tag :fdlibm)
@@ -860,3 +871,19 @@
(kernel::with-float-traps-masked (:invalid)
(assert-true (ext:float-nan-p (kernel:%acosh 0d0)))))
+(define-test expm1.exceptions
+ (:tag :fdlibm)
+ (assert-error 'floating-point-overflow
+ (kernel:%expm1 709.8d0))
+ (assert-equal 'ext:double-float-positive-infinity
+ (kernel:%expm1 ext:double-float-positive-infinity))
+ (assert-error 'floating-point-invalid-operation
+ (kernel:%expm1 *snan*))
+ (assert-true (ext:float-nan-p (kernel:%expm1 *qnan*)))
+ (kernel::with-float-traps-masked (:overflow)
+ (assert-true ext:double-float-positive-infinity
+ (kernel:%expm1 709.8d0))
+ (assert-true ext:double-float-positive-infinity
+ (kernel:%expm1 ext:double-float-positive-infinity)))
+ (kernel::with-float-traps-masked (:invalid)
+ (assert-true (ext::float-nan-p (kernel:%expm1 *snan*)))))
commit 7758900b5e12172d7b0306e67a9dc045e7c33643
Author: Raymond Toy <toy.raymond at gmail.com>
Date: Thu Aug 21 20:32:32 2014 -0700
Handle invalid correctly.
If the argument is a quiet NaN, then we don't want to signal an
invalid operation. For all other floats, we do want to signal
that. Add function isQNaN to detect quiet NaN.
diff --git a/src/lisp/setexception.c b/src/lisp/setexception.c
index a0f568c..a77a9d8 100644
--- a/src/lisp/setexception.c
+++ b/src/lisp/setexception.c
@@ -5,6 +5,37 @@
#include "fdlibm.h"
/*
+ * Test if the given number is a quiet NaN
+ */
+
+int
+isQNaN(double x)
+{
+ int hx;
+ union { int i[2]; double d; } ux;
+
+ ux.d = x;
+ hx = ux.i[HIWORD] & 0x7fffffff;
+
+ if (hx >= 0x7ff00000) {
+ /*
+ * We have some kind of infinity or NaN. Get the (top)
+ * mantissa bits. We have a quiet NaN if the most significant
+ * bit is 1. The other bits of the mantissa don't matter. We
+ * also don't distinguish this from the quiet NaN
+ * floating-point indefinite which only has the most
+ * significant bit set. These are all considered NaNs for our
+ * purposes.
+ */
+ hx &= 0xfffff;
+
+ return hx & 0x80000;
+ }
+
+ return 0;
+}
+
+/*
* Signal the floating-point exception of the given |type|, based on
* the value of |x|.
*/
@@ -36,13 +67,21 @@ fdlibm_setexception(double x, enum FDLIBM_EXCEPTION type)
case 3:
{
/* invalid */
- feraiseexcept(FE_INVALID);
+
+ if (!isQNaN(x)) {
+ /*
+ * If it's not a quiet NaN, we want to signal an invalid
+ * operation. Otherwise, we silently return a NaN.
+ */
+ feraiseexcept(FE_INVALID);
+ }
+
/*
* FIXME: Of the many NaN values that we have, what NaN
* should we return?
*/
union { int i[2]; double d; } ux;
- ux.i[HIWORD] = 0x7ff00000;
+ ux.i[HIWORD] = 0x7ff80000;
ux.i[LOWORD] = 0xdeadbeef;
ret = ux.d;
-----------------------------------------------------------------------
Summary of changes:
src/lisp/s_expm1.c | 10 +++++++---
src/lisp/setexception.c | 43 +++++++++++++++++++++++++++++++++++++++++--
tests/trig.lisp | 41 ++++++++++++++++++++++++++++++++++-------
3 files changed, 82 insertions(+), 12 deletions(-)
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