--- /opt/cvs/dotgnu/pnet/engine/unroll_arith.c	2004-06-18 11:16:41.000000000 +0530
+++ unroll_arith.c	2004-09-24 15:57:52.000000000 +0530
@@ -415,6 +415,52 @@
 }
 break;
 
+case 0x100 + COP_PREFIX_SIN:
+case 0x100 + COP_PREFIX_COS:
+{
+	unsigned char * patch1;
+	UNROLL_START();
+	CheckFPFull(&unroll);
+	reg = GetTopFPRegister(&unroll);
+	reg2 = GetFPRegister(&unroll);
+	if((unroll.regsUsed & (1 << X86_EAX)) != 0)
+	{
+		x86_push_reg(unroll.out, X86_EAX);
+	}
+	if(opcode == (0x100 + COP_PREFIX_SIN))
+	{
+		x86_fsin(unroll.out);
+	}
+	else
+	{
+		x86_fcos(unroll.out);
+	}
+	x86_fnstsw(unroll.out);
+	x86_alu_reg_imm(unroll.out, X86_AND, X86_EAX, 0x0400);
+	patch1 = unroll.out;
+	x86_branch8(unroll.out, X86_CC_Z, 0, 1);
+	/* rem by 2*PI */
+	x86_fldpi(unroll.out);
+	x86_fp_op(unroll.out, X86_FADD, 0);
+	x86_fxch(unroll.out, 1);
+	md_rem_reg_reg_float(unroll.out, reg, reg2, unroll.regsUsed);
+	if(opcode == (0x100 + COP_PREFIX_SIN))
+	{
+		x86_fsin(unroll.out);
+	}
+	else
+	{
+		x86_fcos(unroll.out);
+	}
+	x86_patch(patch1, unroll.out);
+	if((unroll.regsUsed & (1 << X86_EAX)) != 0)
+	{
+		x86_pop_reg(unroll.out, X86_EAX);
+	}
+	MODIFY_UNROLL_PC(CVMP_LEN_NONE);
+}
+break;
+
 #endif /* MD_HAS_FP */
 
 case COP_IAND:
--- /opt/cvs/dotgnu/pnet/engine/x86_codegen.h	2002-05-31 09:27:50.000000000 +0530
+++ x86_codegen.h	2004-09-24 13:50:18.000000000 +0530
@@ -1182,6 +1182,12 @@
 		*(inst)++ = (unsigned char)0xe8;	\
 	} while (0)
 
+#define x86_fldpi(inst) \
+	do { \
+		*(inst)++ = (unsigned char)0xd9;	\
+		*(inst)++ = (unsigned char)0xeb;	\
+	} while (0)
+
 #define x86_fst(inst,mem,is_double,pop_stack)	\
 	do {	\
 		*(inst)++ = (is_double) ? (unsigned char)0xdd: (unsigned char)0xd9;	\