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Re: [Tinycc-devel] libtcc bug when evaluating math expressions
From: |
Daniel Glöckner |
Subject: |
Re: [Tinycc-devel] libtcc bug when evaluating math expressions |
Date: |
Thu, 27 Nov 2003 17:03:55 +0100 |
User-agent: |
Mutt/1.4.1i |
On Thu, Nov 27, 2003 at 01:28:45PM +0000, David Wallin wrote:
> char *eval_me = "double evaluate_me(double x, double v) { return
> (double) ((-1.0 * x) > v * fabs(v)); }\0" ;
#include <math.h>
fabs is not defined and so defaults to returning an integer in eax
instead of a double in st0. On exit of fabs(), eax holds an undefined
value which is then converted to a double and multiplied with v.
GCC knows about fabs and generates the fabs instruction, even with -O0.
Daniel
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