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- Log ----------------------------------------------------------------- commit f61fb8591ba745046f96770093330be7d12e45d2 Author: Raymond Toy toy.raymond@gmail.com Date: Tue Sep 30 21:11:36 2014 -0700

Fix a couple of issues in the code.

* Use fdlibm_setexception to handle the case when the arg is NaN or Inf. (Previously depended on x+x doing the right thing.) * Fix a compiler warning about possible dangling else by adding braces as needed.

diff --git a/src/lisp/s_scalbn.c b/src/lisp/s_scalbn.c index 4889385..1993bbb 100644 --- a/src/lisp/s_scalbn.c +++ b/src/lisp/s_scalbn.c @@ -52,15 +52,24 @@ tiny = 1.0e-300; k = ((hx&0x7ff00000)>>20) - 54; if (n< -50000) return fdlibm_setexception(x, FDLIBM_UNDERFLOW);; /*underflow*/ } - if (k==0x7ff) return x+x; /* NaN or Inf */ + if (k==0x7ff) { + /* NaN or Inf */ + if(((hx&0xfffff)|lx)!=0) { + return fdlibm_setexception(x, FDLIBM_INVALID); + } else { + return fdlibm_setexception(x, FDLIBM_OVERFLOW); + } + } + k = k+n; if (k > 0x7fe) return fdlibm_setexception(x, FDLIBM_OVERFLOW); /* overflow */ if (k > 0) /* normal result */ {ux.i[HIWORD] = (hx&0x800fffff)|(k<<20); return x;} - if (k <= -54) + if (k <= -54) { if (n > 50000) /* in case integer overflow in n+k */ return fdlibm_setexception(x, FDLIBM_OVERFLOW); /*overflow*/ else return fdlibm_setexception(x, FDLIBM_UNDERFLOW); /*underflow*/ + } k += 54; /* subnormal result */ ux.i[HIWORD] = (hx&0x800fffff)|(k<<20); return x*twom54;

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Summary of changes: src/lisp/s_scalbn.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)

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