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- Log ----------------------------------------------------------------- commit 2aa84447c6a2f5cee471d150a354226d0842fb69 Author: Raymond Toy toy.raymond@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*)))))
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Summary of changes: src/lisp/e_log.c | 13 ++++++++++--- tests/trig.lisp | 22 +++++++++++++++++++++- 2 files changed, 31 insertions(+), 4 deletions(-)
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