On 6.6.19. 20:34, Richard Henderson wrote:
On 6/6/19 5:15 AM, Stefan Brankovic wrote:
+ for (i = 0; i < 2; i++) {
+ if (i == 0) {
+ /* Get high doubleword element of vB in avr. */
+ get_avr64(avr, VB, true);
+ } else {
+ /* Get low doubleword element of vB in avr. */
+ get_avr64(avr, VB, false);
+ }
Better as simply get_avr64(avr, VB, i);
Definitely shorter way to do this.
+ /*
+ * Perform count for every word element using tcg_gen_clzi_i64.
+ * Since it counts leading zeros on 64 bit lenght, we have to move
+ * ith word element to highest 32 bits of tmp, or it with mask(so we
get
+ * all ones in lowest 32 bits), then perform tcg_gen_clzi_i64 and move
+ * it's result in appropriate word element of result.
+ */
+ tcg_gen_shli_i64(tmp, avr, 32);
+ tcg_gen_or_i64(tmp, tmp, mask);
+ tcg_gen_clzi_i64(result, tmp, 64);
+
+ tcg_gen_or_i64(tmp, avr, mask);
+ tcg_gen_clzi_i64(tmp, tmp, 64);
s/64/32.
+ tcg_gen_deposit_i64(result, result, tmp, 32, 32);
That said, it's probably better to treat this as 4 words, not 2 doublewords.
for (i = 0; i < 4; i++) {
tcg_gen_ld_i32(tmp, cpu_env, avr_full_offset(VB) + i * 4);
tcg_gen_clzi_i32(tmp, tmp, 32);
tcg_gen_st_i32(tmp, cpu_env, avr_full_offset(VT) + i * 4);
}
I will use this way in v2.
Kind Regards,
Stefan
r~
