X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=mono%2Fmini%2Fmini-amd64.c;h=7b3b9be54a4cb66a3201bf44b3503077593a5a25;hb=62e53e733c55c0940eba0ac78b20a10adf5af9b6;hp=2409f6e02006cd85264e08cb66c03c121c60c7d5;hpb=2e86af5c12fefac619c4dd439aef77462e2910c4;p=mono.git

diff --git a/mono/mini/mini-amd64.c b/mono/mini/mini-amd64.c
index 2409f6e0200..7b3b9be54a4 100644
--- 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);