2007-01-25 Zoltan Varga <vargaz@gmail.com>

[mono.git] / mono / mini / mini-amd64.c

diff --git a/mono/mini/mini-amd64.c b/mono/mini/mini-amd64.c
index 2409f6e02006cd85264e08cb66c03c121c60c7d5..7b3b9be54a4cb66a3201bf44b3503077593a5a25 100644 (file)
--- a/mono/mini/mini-amd64.c
+++ b/mono/mini/mini-amd64.c
@@ -3743,7 +3743,19 @@ mono_arch_output_basic_block (MonoCompile *cfg, MonoBasicBlock *bb)
                case OP_FBGT:
                case OP_FBGT_UN:
                        if (use_sse2 || (cfg->opt & MONO_OPT_FCMOV)) {
-                               EMIT_COND_BRANCH (ins, X86_CC_LT, FALSE);
+                               if (ins->opcode == OP_FBGT) {
+                                       guchar *br1;
+
+                                       /* skip branch if C1=1 */
+                                       br1 = code;
+                                       x86_branch8 (code, X86_CC_P, 0, FALSE);
+                                       /* branch if (C0 | C3) = 1 */
+                                       EMIT_COND_BRANCH (ins, X86_CC_LT, FALSE);
+                                       amd64_patch (br1, code);
+                                       break;
+                               } else {
+                                       EMIT_COND_BRANCH (ins, X86_CC_LT, FALSE);
+                               }
                                break;
                        }
                        amd64_alu_reg_imm (code, X86_CMP, AMD64_RAX, X86_FP_C0);