fp-bench: remove wrong exponent raise in fill_random

At this point random_ops[] only contains normals, so there's
no need to do anything to them. In fact, raising the exponent
here can make the output !normal, which is precisely
what the comment says we want to avoid.
Signed-off-by: NEmilio G. Cota <cota@braap.org>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NAlex Bennée <alex.bennee@linaro.org>

tests/fp/fp-bench.c

@@ -176,8 +176,6 @@ static void fill_random(union fp *ops, int n_ops, enum precision prec,
             if (no_neg && float32_is_neg(ops[i].f32)) {
                 ops[i].f32 = float32_chs(ops[i].f32);
             }
-            /* raise the exponent to limit the frequency of denormal results */
-            ops[i].f32 |= 0x40000000;
             break;
         case PREC_DOUBLE:
         case PREC_FLOAT64:
@@ -185,8 +183,6 @@ static void fill_random(union fp *ops, int n_ops, enum precision prec,
             if (no_neg && float64_is_neg(ops[i].f64)) {
                 ops[i].f64 = float64_chs(ops[i].f64);
             }
-            /* raise the exponent to limit the frequency of denormal results */
-            ops[i].f64 |= LIT64(0x4000000000000000);
             break;
         default:
             g_assert_not_reached();