gwj / at91sam9263 · Commits

Commit dfa1a3f1c40b120e863cd56605ddbec276569bcd

Authored by aurel32
1 parent 84aafb06

tcg: optimize tcg_gen_bswap16_i32 

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6831 c046a42c-6fe2-441c-8c8c-71466251a162
Inline Side-by-side
Showing 1 changed file with 5 additions and 8 deletions
tcg/tcg-op.h
  View file @dfa1a3f
... ... @@ -1207,16 +1207,13 @@ static inline void tcg_gen_bswap16_i32(TCGv_i32 ret, TCGv_i32 arg)
1207 1207 #ifdef TCG_TARGET_HAS_bswap16_i32
1208 1208 tcg_gen_op2_i32(INDEX_op_bswap16_i32, ret, arg);
1209 1209 #else
1210   - TCGv_i32 t0, t1;
1211   - t0 = tcg_temp_new_i32();
1212   - t1 = tcg_temp_new_i32();
  1210 + TCGv_i32 t0 = tcg_temp_new_i32();
1213 1211  
1214   - tcg_gen_shri_i32(t0, arg, 8);
1215   - tcg_gen_andi_i32(t1, arg, 0x000000ff);
1216   - tcg_gen_shli_i32(t1, t1, 8);
1217   - tcg_gen_or_i32(ret, t0, t1);
  1212 + tcg_gen_ext8u_i32(t0, arg);
  1213 + tcg_gen_shli_i32(t0, t0, 8);
  1214 + tcg_gen_shri_i32(ret, arg, 8);
  1215 + tcg_gen_or_i32(ret, ret, t0);
1218 1216 tcg_temp_free_i32(t0);
1219   - tcg_temp_free_i32(t1);
1220 1217 #endif
1221 1218 }
1222 1219  
... ...