commit 733fef0e402abc99a1f914a5180b0b36deee0b90
author pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> Sun Sep 07 18:07:39 2008 +0000
committer pbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162> Sun Sep 07 18:07:39 2008 +0000
tree abc386edf62ac36ea357e67e4ece6dfc91a75085
parent b6d17150af9930f28aec1debc41f6c5f9ddcc3ba

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

tcg/x86_64/tcg-target.c

diff --git a/tcg/x86_64/tcg-target.c b/tcg/x86_64/tcg-target.c
index 38e164e..304a0c3 100644
--- a/tcg/x86_64/tcg-target.c
+++ b/tcg/x86_64/tcg-target.c
@@ -382,6 +382,12 @@
     if (val == (int8_t)val) {
         tcg_out_modrm(s, 0x83, c, r0);
         tcg_out8(s, val);
+    } else if (c == ARITH_AND && val == 0xffu) {
+        /* movzbl */
+        tcg_out_modrm(s, 0xb6 | P_EXT | P_REXB, r0, r0);
+    } else if (c == ARITH_AND && val == 0xffffu) {
+        /* movzwl */
+        tcg_out_modrm(s, 0xb7 | P_EXT, r0, r0);
     } else {
         tcg_out_modrm(s, 0x81, c, r0);
         tcg_out32(s, val);
@@ -393,6 +399,15 @@
     if (val == (int8_t)val) {
         tcg_out_modrm(s, 0x83 | P_REXW, c, r0);
         tcg_out8(s, val);
+    } else if (c == ARITH_AND && val == 0xffu) {
+        /* movzbl */
+        tcg_out_modrm(s, 0xb6 | P_EXT | P_REXW, r0, r0);
+    } else if (c == ARITH_AND && val == 0xffffu) {
+        /* movzwl */
+        tcg_out_modrm(s, 0xb7 | P_EXT | P_REXW, r0, r0);
+    } else if (c == ARITH_AND && val == 0xffffffffu) {
+        /* 32-bit mov zero extends */
+        tcg_out_modrm(s, 0x8b, r0, r0);
     } else if (val == (int32_t)val) {
         tcg_out_modrm(s, 0x81 | P_REXW, c, r0);
         tcg_out32(s, val);