[git] CMU Common Lisp branch master updated. snapshot-2014-08-25-g2aa8444

[Raymond Toy]

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- Log -----------------------------------------------------------------
commit 2aa84447c6a2f5cee471d150a354226d0842fb69
Author: Raymond Toy <toy.raymond at gmail.com>
Date:   Fri Aug 22 20:33:20 2014 -0700

    Make log signal errors using fdlibm_setexception.
    
     * src/lisp/e_log.c
       * Use fdlibm_setexception
     * tests/trig.lisp:
       * Add tests for log

diff --git a/src/lisp/e_log.c b/src/lisp/e_log.c
index 032f794..01022ee 100644
--- a/src/lisp/e_log.c
+++ b/src/lisp/e_log.c
@@ -100,9 +100,16 @@ static double zero   =  0.0;
 
 	k=0;
 	if (hx < 0x00100000) {			/* x < 2**-1022  */
-	    if (((hx&0x7fffffff)|lx)==0) 
-		return -two54/zero;		/* log(+-0)=-inf */
-	    if (hx<0) return (x-x)/zero;	/* log(-#) = NaN */
+	    if (((hx&0x7fffffff)|lx)==0) {
+                /* log(+-0)=-inf */
+		return fdlibm_setexception(-1.0, FDLIBM_DIVIDE_BY_ZERO);
+            }
+            
+            if (hx<0) {
+                /* log(-#) = NaN */
+                return fdlibm_setexception(x, FDLIBM_INVALID);
+            }
+            
 	    k -= 54; x *= two54; /* subnormal number, scale up x */
 	    ux.d = x;
 	    hx = ux.i[HIWORD];		/* high word of x */
diff --git a/tests/trig.lisp b/tests/trig.lisp
index 5001375..b4163b7 100644
--- a/tests/trig.lisp
+++ b/tests/trig.lisp
@@ -911,4 +911,24 @@
 		(kernel:%exp ext:double-float-positive-infinity))
   (kernel::with-float-traps-masked (:overflow)
     (assert-equal ext:double-float-positive-infinity
-		  (kernel:%exp 710d0))))
\ No newline at end of file
+		  (kernel:%exp 710d0))))
+
+(define-test log.exception
+  (:tag :fdlibm)
+  (assert-error 'division-by-zero
+		(kernel:%log 0d0))
+  (assert-error 'division-by-zero
+		(kernel:%log -0d0))
+  (assert-error 'floating-point-invalid-operation
+		(kernel:%log -1d0))
+  (assert-error 'floating-point-invalid-operation
+		(kernel:%log *snan*))
+  (assert-true (ext:float-nan-p (kernel:%log *qnan*)))
+  (kernel::with-float-traps-masked (:divide-by-zero)
+    (assert-equal ext:double-float-negative-infinity
+		  (kernel:%log 0d0))
+    (assert-equal ext:double-float-negative-infinity
+		  (kernel:%log -0d0)))
+  (kernel::with-float-traps-masked (:invalid)
+    (assert-true (ext:float-nan-p (kernel:%log -1d0)))
+    (assert-true (ext:float-nan-p (kernel:%log *snan*)))))

-----------------------------------------------------------------------

Summary of changes:
 src/lisp/e_log.c |   13 ++++++++++---
 tests/trig.lisp  |   22 +++++++++++++++++++++-
 2 files changed, 31 insertions(+), 4 deletions(-)


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