really disable CSE in backend, and add an assert about that in bespill.c

[libfirm] / ir / tv / fltcalc.c

diff --git a/ir/tv/fltcalc.c b/ir/tv/fltcalc.c
index ca16d7f..bed4dac 100644 (file)
--- a/ir/tv/fltcalc.c
+++ b/ir/tv/fltcalc.c
@@ -1651,9 +1651,13 @@ int fc_flt2int(const fp_value *a, void *result, ir_mode *dst_mode) {
                }
 
                assert(exp_val >= 0 && "floating point value not integral before fc_flt2int() call");
-               shift = a->desc.mantissa_size - exp_val + 2;
+               shift = exp_val - a->desc.mantissa_size - 2;
 
-               sc_shrI(_mant(a), shift, 64, 0, result);
+               if (shift > 0) {
+                       sc_shlI(_mant(a),  shift, 64, 0, result);
+               } else {
+                       sc_shrI(_mant(a), -shift, 64, 0, result);
+               }
 
                /* check for overflow */
                highest = sc_get_highest_set_bit(result);