gwj / at91sam9263 · Commits

Commit 733fef0e402abc99a1f914a5180b0b36deee0b90

Authored by pbrook
1 parent b6d17150

TCG: Use x86-64 zero extension instructions. 

Signed-off-by: Paul Brook <paul@codesourcery.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5180 c046a42c-6fe2-441c-8c8c-71466251a162
Inline Side-by-side
Showing 1 changed file with 15 additions and 0 deletions
tcg/x86_64/tcg-target.c
  View file @733fef0
... ... @@ -382,6 +382,12 @@ static inline void tgen_arithi32(TCGContext *s, int c, int r0, int32_t val)
382 382 if (val == (int8_t)val) {
383 383 tcg_out_modrm(s, 0x83, c, r0);
384 384 tcg_out8(s, val);
  385 + } else if (c == ARITH_AND && val == 0xffu) {
  386 + /* movzbl */
  387 + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB, r0, r0);
  388 + } else if (c == ARITH_AND && val == 0xffffu) {
  389 + /* movzwl */
  390 + tcg_out_modrm(s, 0xb7 | P_EXT, r0, r0);
385 391 } else {
386 392 tcg_out_modrm(s, 0x81, c, r0);
387 393 tcg_out32(s, val);
... ... @@ -393,6 +399,15 @@ static inline void tgen_arithi64(TCGContext *s, int c, int r0, int64_t val)
393 399 if (val == (int8_t)val) {
394 400 tcg_out_modrm(s, 0x83 | P_REXW, c, r0);
395 401 tcg_out8(s, val);
  402 + } else if (c == ARITH_AND && val == 0xffu) {
  403 + /* movzbl */
  404 + tcg_out_modrm(s, 0xb6 | P_EXT | P_REXW, r0, r0);
  405 + } else if (c == ARITH_AND && val == 0xffffu) {
  406 + /* movzwl */
  407 + tcg_out_modrm(s, 0xb7 | P_EXT | P_REXW, r0, r0);
  408 + } else if (c == ARITH_AND && val == 0xffffffffu) {
  409 + /* 32-bit mov zero extends */
  410 + tcg_out_modrm(s, 0x8b, r0, r0);
396 411 } else if (val == (int32_t)val) {
397 412 tcg_out_modrm(s, 0x81 | P_REXW, c, r0);
398 413 tcg_out32(s, val);
... ...