Initial import

1 files changed, 1443 insertions, 0 deletions

diff --git a/arch/parisc/math-emu/fpudispatch.c b/arch/parisc/math-emu/fpudispatch.c
new file mode 100644
index 000000000..673b73e84
--- /dev/null
+++ b/arch/parisc/math-emu/fpudispatch.c
@@ -0,0 +1,1443 @@
+/*
+ * Linux/PA-RISC Project (http://www.parisc-linux.org/)
+ *
+ * Floating-point emulation code
+ *  Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2, or (at your option)
+ *    any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/*
+ * BEGIN_DESC
+ *
+ *  File:
+ *	@(#)	pa/fp/fpudispatch.c		$Revision: 1.1 $
+ *
+ *  Purpose:
+ *	<<please update with a synopsis of the functionality provided by this file>>
+ *
+ *  External Interfaces:
+ *	<<the following list was autogenerated, please review>>
+ *	emfpudispatch(ir, dummy1, dummy2, fpregs)
+ *	fpudispatch(ir, excp_code, holder, fpregs)
+ *
+ *  Internal Interfaces:
+ *	<<the following list was autogenerated, please review>>
+ *	static u_int decode_06(u_int, u_int *)
+ *	static u_int decode_0c(u_int, u_int, u_int, u_int *)
+ *	static u_int decode_0e(u_int, u_int, u_int, u_int *)
+ *	static u_int decode_26(u_int, u_int *)
+ *	static u_int decode_2e(u_int, u_int *)
+ *	static void update_status_cbit(u_int *, u_int, u_int, u_int)
+ *
+ *  Theory:
+ *	<<please update with a overview of the operation of this file>>
+ *
+ * END_DESC
+*/
+
+#define FPUDEBUG 0
+
+#include "float.h"
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <asm/processor.h>
+/* #include <sys/debug.h> */
+/* #include <machine/sys/mdep_private.h> */
+
+#define COPR_INST 0x30000000
+
+/*
+ * definition of extru macro.  If pos and len are constants, the compiler
+ * will generate an extru instruction when optimized
+ */
+#define extru(r,pos,len)	(((r) >> (31-(pos))) & (( 1 << (len)) - 1))
+/* definitions of bit field locations in the instruction */
+#define fpmajorpos 5
+#define fpr1pos	10
+#define fpr2pos 15
+#define fptpos	31
+#define fpsubpos 18
+#define fpclass1subpos 16
+#define fpclasspos 22
+#define fpfmtpos 20
+#define fpdfpos 18
+#define fpnulpos 26
+/*
+ * the following are the extra bits for the 0E major op
+ */
+#define fpxr1pos 24
+#define fpxr2pos 19
+#define fpxtpos 25
+#define fpxpos 23
+#define fp0efmtpos 20
+/*
+ * the following are for the multi-ops
+ */
+#define fprm1pos 10
+#define fprm2pos 15
+#define fptmpos 31
+#define fprapos 25
+#define fptapos 20
+#define fpmultifmt 26
+/*
+ * the following are for the fused FP instructions
+ */
+     /* fprm1pos 10 */
+     /* fprm2pos 15 */
+#define fpraupos 18
+#define fpxrm2pos 19
+     /* fpfmtpos 20 */
+#define fpralpos 23
+#define fpxrm1pos 24
+     /* fpxtpos 25 */
+#define fpfusedsubop 26
+     /* fptpos	31 */
+
+/*
+ * offset to constant zero in the FP emulation registers
+ */
+#define fpzeroreg (32*sizeof(double)/sizeof(u_int))
+
+/*
+ * extract the major opcode from the instruction
+ */
+#define get_major(op) extru(op,fpmajorpos,6)
+/*
+ * extract the two bit class field from the FP instruction. The class is at bit
+ * positions 21-22
+ */
+#define get_class(op) extru(op,fpclasspos,2)
+/*
+ * extract the 3 bit subop field.  For all but class 1 instructions, it is
+ * located at bit positions 16-18
+ */
+#define get_subop(op) extru(op,fpsubpos,3)
+/*
+ * extract the 2 or 3 bit subop field from class 1 instructions.  It is located
+ * at bit positions 15-16 (PA1.1) or 14-16 (PA2.0)
+ */
+#define get_subop1_PA1_1(op) extru(op,fpclass1subpos,2)	/* PA89 (1.1) fmt */
+#define get_subop1_PA2_0(op) extru(op,fpclass1subpos,3)	/* PA 2.0 fmt */
+
+/* definitions of unimplemented exceptions */
+#define MAJOR_0C_EXCP	0x09
+#define MAJOR_0E_EXCP	0x0b
+#define MAJOR_06_EXCP	0x03
+#define MAJOR_26_EXCP	0x23
+#define MAJOR_2E_EXCP	0x2b
+#define PA83_UNIMP_EXCP	0x01
+
+/*
+ * Special Defines for TIMEX specific code
+ */
+
+#define FPU_TYPE_FLAG_POS (EM_FPU_TYPE_OFFSET>>2)
+#define TIMEX_ROLEX_FPU_MASK (TIMEX_EXTEN_FLAG|ROLEX_EXTEN_FLAG)
+
+/*
+ * Static function definitions
+ */
+#define _PROTOTYPES
+#if defined(_PROTOTYPES) || defined(_lint)
+static u_int decode_0c(u_int, u_int, u_int, u_int *);
+static u_int decode_0e(u_int, u_int, u_int, u_int *);
+static u_int decode_06(u_int, u_int *);
+static u_int decode_26(u_int, u_int *);
+static u_int decode_2e(u_int, u_int *);
+static void update_status_cbit(u_int *, u_int, u_int, u_int);
+#else /* !_PROTOTYPES&&!_lint */
+static u_int decode_0c();
+static u_int decode_0e();
+static u_int decode_06();
+static u_int decode_26();
+static u_int decode_2e();
+static void update_status_cbit();
+#endif /* _PROTOTYPES&&!_lint */
+
+#define VASSERT(x)
+
+static void parisc_linux_get_fpu_type(u_int fpregs[])
+{
+	/* on pa-linux the fpu type is not filled in by the
+	 * caller; it is constructed here  
+	 */ 
+	if (boot_cpu_data.cpu_type == pcxs)
+		fpregs[FPU_TYPE_FLAG_POS] = TIMEX_EXTEN_FLAG;
+	else if (boot_cpu_data.cpu_type == pcxt ||
+	         boot_cpu_data.cpu_type == pcxt_)
+		fpregs[FPU_TYPE_FLAG_POS] = ROLEX_EXTEN_FLAG;
+	else if (boot_cpu_data.cpu_type >= pcxu)
+		fpregs[FPU_TYPE_FLAG_POS] = PA2_0_FPU_FLAG;
+}
+
+/*
+ * this routine will decode the excepting floating point instruction and
+ * call the approiate emulation routine.
+ * It is called by decode_fpu with the following parameters:
+ * fpudispatch(current_ir, unimplemented_code, 0, &Fpu_register)
+ * where current_ir is the instruction to be emulated,
+ * unimplemented_code is the exception_code that the hardware generated
+ * and &Fpu_register is the address of emulated FP reg 0.
+ */
+u_int
+fpudispatch(u_int ir, u_int excp_code, u_int holder, u_int fpregs[])
+{
+	u_int class, subop;
+	u_int fpu_type_flags;
+
+	/* All FP emulation code assumes that ints are 4-bytes in length */
+	VASSERT(sizeof(int) == 4);
+
+	parisc_linux_get_fpu_type(fpregs);
+
+	fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];  /* get fpu type flags */
+
+	class = get_class(ir);
+	if (class == 1) {
+		if  (fpu_type_flags & PA2_0_FPU_FLAG)
+			subop = get_subop1_PA2_0(ir);
+		else
+			subop = get_subop1_PA1_1(ir);
+	}
+	else
+		subop = get_subop(ir);
+
+	if (FPUDEBUG) printk("class %d subop %d\n", class, subop);
+
+	switch (excp_code) {
+		case MAJOR_0C_EXCP:
+		case PA83_UNIMP_EXCP:
+			return(decode_0c(ir,class,subop,fpregs));
+		case MAJOR_0E_EXCP:
+			return(decode_0e(ir,class,subop,fpregs));
+		case MAJOR_06_EXCP:
+			return(decode_06(ir,fpregs));
+		case MAJOR_26_EXCP:
+			return(decode_26(ir,fpregs));
+		case MAJOR_2E_EXCP:
+			return(decode_2e(ir,fpregs));
+		default:
+			/* "crashme Night Gallery painting nr 2. (asm_crash.s).
+			 * This was fixed for multi-user kernels, but
+			 * workstation kernels had a panic here.  This allowed
+			 * any arbitrary user to panic the kernel by executing
+			 * setting the FP exception registers to strange values
+			 * and generating an emulation trap.  The emulation and
+			 * exception code must never be able to panic the
+			 * kernel.
+			 */
+			return(UNIMPLEMENTEDEXCEPTION);
+	}
+}
+
+/*
+ * this routine is called by $emulation_trap to emulate a coprocessor
+ * instruction if one doesn't exist
+ */
+u_int
+emfpudispatch(u_int ir, u_int dummy1, u_int dummy2, u_int fpregs[])
+{
+	u_int class, subop, major;
+	u_int fpu_type_flags;
+
+	/* All FP emulation code assumes that ints are 4-bytes in length */
+	VASSERT(sizeof(int) == 4);
+
+	fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];  /* get fpu type flags */
+
+	major = get_major(ir);
+	class = get_class(ir);
+	if (class == 1) {
+		if  (fpu_type_flags & PA2_0_FPU_FLAG)
+			subop = get_subop1_PA2_0(ir);
+		else
+			subop = get_subop1_PA1_1(ir);
+	}
+	else
+		subop = get_subop(ir);
+	switch (major) {
+		case 0x0C:
+			return(decode_0c(ir,class,subop,fpregs));
+		case 0x0E:
+			return(decode_0e(ir,class,subop,fpregs));
+		case 0x06:
+			return(decode_06(ir,fpregs));
+		case 0x26:
+			return(decode_26(ir,fpregs));
+		case 0x2E:
+			return(decode_2e(ir,fpregs));
+		default:
+			return(PA83_UNIMP_EXCP);
+	}
+}
+	
+
+static u_int
+decode_0c(u_int ir, u_int class, u_int subop, u_int fpregs[])
+{
+	u_int r1,r2,t;		/* operand register offsets */ 
+	u_int fmt;		/* also sf for class 1 conversions */
+	u_int  df;		/* for class 1 conversions */
+	u_int *status;
+	u_int retval, local_status;
+	u_int fpu_type_flags;
+
+	if (ir == COPR_INST) {
+		fpregs[0] = EMULATION_VERSION << 11;
+		return(NOEXCEPTION);
+	}
+	status = &fpregs[0];	/* fp status register */
+	local_status = fpregs[0]; /* and local copy */
+	r1 = extru(ir,fpr1pos,5) * sizeof(double)/sizeof(u_int);
+	if (r1 == 0)		/* map fr0 source to constant zero */
+		r1 = fpzeroreg;
+	t = extru(ir,fptpos,5) * sizeof(double)/sizeof(u_int);
+	if (t == 0 && class != 2)	/* don't allow fr0 as a dest */
+		return(MAJOR_0C_EXCP);
+	fmt = extru(ir,fpfmtpos,2);	/* get fmt completer */
+
+	switch (class) {
+	    case 0:
+		switch (subop) {
+			case 0:	/* COPR 0,0 emulated above*/
+			case 1:
+				return(MAJOR_0C_EXCP);
+			case 2:	/* FCPY */
+				switch (fmt) {
+				    case 2: /* illegal */
+					return(MAJOR_0C_EXCP);
+				    case 3: /* quad */
+					t &= ~3;  /* force to even reg #s */
+					r1 &= ~3;
+					fpregs[t+3] = fpregs[r1+3];
+					fpregs[t+2] = fpregs[r1+2];
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					fpregs[t] = fpregs[r1];
+					return(NOEXCEPTION);
+				}
+			case 3: /* FABS */
+				switch (fmt) {
+				    case 2: /* illegal */
+					return(MAJOR_0C_EXCP);
+				    case 3: /* quad */
+					t &= ~3;  /* force to even reg #s */
+					r1 &= ~3;
+					fpregs[t+3] = fpregs[r1+3];
+					fpregs[t+2] = fpregs[r1+2];
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					/* copy and clear sign bit */
+					fpregs[t] = fpregs[r1] & 0x7fffffff;
+					return(NOEXCEPTION);
+				}
+			case 6: /* FNEG */
+				switch (fmt) {
+				    case 2: /* illegal */
+					return(MAJOR_0C_EXCP);
+				    case 3: /* quad */
+					t &= ~3;  /* force to even reg #s */
+					r1 &= ~3;
+					fpregs[t+3] = fpregs[r1+3];
+					fpregs[t+2] = fpregs[r1+2];
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					/* copy and invert sign bit */
+					fpregs[t] = fpregs[r1] ^ 0x80000000;
+					return(NOEXCEPTION);
+				}
+			case 7: /* FNEGABS */
+				switch (fmt) {
+				    case 2: /* illegal */
+					return(MAJOR_0C_EXCP);
+				    case 3: /* quad */
+					t &= ~3;  /* force to even reg #s */
+					r1 &= ~3;
+					fpregs[t+3] = fpregs[r1+3];
+					fpregs[t+2] = fpregs[r1+2];
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					/* copy and set sign bit */
+					fpregs[t] = fpregs[r1] | 0x80000000;
+					return(NOEXCEPTION);
+				}
+			case 4: /* FSQRT */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fsqrt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fsqrt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2:
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 5: /* FRND */
+				switch (fmt) {
+				    case 0:
+					return(sgl_frnd(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_frnd(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2:
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+		} /* end of switch (subop) */
+
+	case 1: /* class 1 */
+		df = extru(ir,fpdfpos,2); /* get dest format */
+		if ((df & 2) || (fmt & 2)) {
+			/*
+			 * fmt's 2 and 3 are illegal of not implemented
+			 * quad conversions
+			 */
+			return(MAJOR_0C_EXCP);
+		}
+		/*
+		 * encode source and dest formats into 2 bits.
+		 * high bit is source, low bit is dest.
+		 * bit = 1 --> double precision
+		 */
+		fmt = (fmt << 1) | df;
+		switch (subop) {
+			case 0: /* FCNVFF */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(MAJOR_0C_EXCP);
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvff(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvff(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(MAJOR_0C_EXCP);
+				}
+			case 1: /* FCNVXF */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 2: /* FCNVFX */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 3: /* FCNVFXT */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 5: /* FCNVUF (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 6: /* FCNVFU (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 7: /* FCNVFUT (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 4: /* undefined */
+				return(MAJOR_0C_EXCP);
+		} /* end of switch subop */
+
+	case 2: /* class 2 */
+		fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];
+		r2 = extru(ir, fpr2pos, 5) * sizeof(double)/sizeof(u_int);
+		if (r2 == 0)
+			r2 = fpzeroreg;
+		if  (fpu_type_flags & PA2_0_FPU_FLAG) {
+			/* FTEST if nullify bit set, otherwise FCMP */
+			if (extru(ir, fpnulpos, 1)) {  /* FTEST */
+				switch (fmt) {
+				    case 0:
+					/*
+					 * arg0 is not used
+					 * second param is the t field used for
+					 * ftest,acc and ftest,rej
+					 * third param is the subop (y-field)
+					 */
+					BUG();
+					/* Unsupported
+					 * return(ftest(0L,extru(ir,fptpos,5),
+					 *	 &fpregs[0],subop));
+					 */
+				    case 1:
+				    case 2:
+				    case 3:
+					return(MAJOR_0C_EXCP);
+				}
+			} else {  /* FCMP */
+				switch (fmt) {
+				    case 0:
+					retval = sgl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 1:
+					retval = dbl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			}
+		}  /* end of if for PA2.0 */
+		else {	/* PA1.0 & PA1.1 */
+		    switch (subop) {
+			case 2:
+			case 3:
+			case 4:
+			case 5:
+			case 6:
+			case 7:
+				return(MAJOR_0C_EXCP);
+			case 0: /* FCMP */
+				switch (fmt) {
+				    case 0:
+					retval = sgl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 1:
+					retval = dbl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 1: /* FTEST */
+				switch (fmt) {
+				    case 0:
+					/*
+					 * arg0 is not used
+					 * second param is the t field used for
+					 * ftest,acc and ftest,rej
+					 * third param is the subop (y-field)
+					 */
+					BUG();
+					/* unsupported
+					 * return(ftest(0L,extru(ir,fptpos,5),
+					 *     &fpregs[0],subop));
+					 */
+				    case 1:
+				    case 2:
+				    case 3:
+					return(MAJOR_0C_EXCP);
+				}
+		    } /* end of switch subop */
+		} /* end of else for PA1.0 & PA1.1 */
+	case 3: /* class 3 */
+		r2 = extru(ir,fpr2pos,5) * sizeof(double)/sizeof(u_int);
+		if (r2 == 0)
+			r2 = fpzeroreg;
+		switch (subop) {
+			case 5:
+			case 6:
+			case 7:
+				return(MAJOR_0C_EXCP);
+			
+			case 0: /* FADD */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fadd(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fadd(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 1: /* FSUB */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fsub(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fsub(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 2: /* FMPY */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fmpy(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fmpy(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 3: /* FDIV */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fdiv(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fdiv(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+			case 4: /* FREM */
+				switch (fmt) {
+				    case 0:
+					return(sgl_frem(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_frem(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 2: /* illegal */
+				    case 3: /* quad not implemented */
+					return(MAJOR_0C_EXCP);
+				}
+		} /* end of class 3 switch */
+	} /* end of switch(class) */
+
+	/* If we get here, something is really wrong! */
+	return(MAJOR_0C_EXCP);
+}
+
+static u_int
+decode_0e(ir,class,subop,fpregs)
+u_int ir,class,subop;
+u_int fpregs[];
+{
+	u_int r1,r2,t;		/* operand register offsets */
+	u_int fmt;		/* also sf for class 1 conversions */
+	u_int df;		/* dest format for class 1 conversions */
+	u_int *status;
+	u_int retval, local_status;
+	u_int fpu_type_flags;
+
+	status = &fpregs[0];
+	local_status = fpregs[0];
+	r1 = ((extru(ir,fpr1pos,5)<<1)|(extru(ir,fpxr1pos,1)));
+	if (r1 == 0)
+		r1 = fpzeroreg;
+	t = ((extru(ir,fptpos,5)<<1)|(extru(ir,fpxtpos,1)));
+	if (t == 0 && class != 2)
+		return(MAJOR_0E_EXCP);
+	if (class < 2)		/* class 0 or 1 has 2 bit fmt */
+		fmt = extru(ir,fpfmtpos,2);
+	else 			/* class 2 and 3 have 1 bit fmt */
+		fmt = extru(ir,fp0efmtpos,1);
+	/*
+	 * An undefined combination, double precision accessing the
+	 * right half of a FPR, can get us into trouble.  
+	 * Let's just force proper alignment on it.
+	 */
+	if (fmt == DBL) {
+		r1 &= ~1;
+		if (class != 1)
+			t &= ~1;
+	}
+
+	switch (class) {
+	    case 0:
+		switch (subop) {
+			case 0: /* unimplemented */
+			case 1:
+				return(MAJOR_0E_EXCP);
+			case 2: /* FCPY */
+				switch (fmt) {
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					fpregs[t] = fpregs[r1];
+					return(NOEXCEPTION);
+				}
+			case 3: /* FABS */
+				switch (fmt) {
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					fpregs[t] = fpregs[r1] & 0x7fffffff;
+					return(NOEXCEPTION);
+				}
+			case 6: /* FNEG */
+				switch (fmt) {
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					fpregs[t] = fpregs[r1] ^ 0x80000000;
+					return(NOEXCEPTION);
+				}
+			case 7: /* FNEGABS */
+				switch (fmt) {
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				    case 1: /* double */
+					fpregs[t+1] = fpregs[r1+1];
+				    case 0: /* single */
+					fpregs[t] = fpregs[r1] | 0x80000000;
+					return(NOEXCEPTION);
+				}
+			case 4: /* FSQRT */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fsqrt(&fpregs[r1],0,
+						&fpregs[t], status));
+				    case 1:
+					return(dbl_fsqrt(&fpregs[r1],0,
+						&fpregs[t], status));
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				}
+			case 5: /* FRMD */
+				switch (fmt) {
+				    case 0:
+					return(sgl_frnd(&fpregs[r1],0,
+						&fpregs[t], status));
+				    case 1:
+					return(dbl_frnd(&fpregs[r1],0,
+						&fpregs[t], status));
+				    case 2:
+				    case 3:
+					return(MAJOR_0E_EXCP);
+				}
+		} /* end of switch (subop */
+	
+	case 1: /* class 1 */
+		df = extru(ir,fpdfpos,2); /* get dest format */
+		/*
+		 * Fix Crashme problem (writing to 31R in double precision)
+		 * here too.
+		 */
+		if (df == DBL) {
+			t &= ~1;
+		}
+		if ((df & 2) || (fmt & 2))
+			return(MAJOR_0E_EXCP);
+		
+		fmt = (fmt << 1) | df;
+		switch (subop) {
+			case 0: /* FCNVFF */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(MAJOR_0E_EXCP);
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvff(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvff(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(MAJOR_0E_EXCP);
+				}
+			case 1: /* FCNVXF */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvxf(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 2: /* FCNVFX */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfx(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 3: /* FCNVFXT */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfxt(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 5: /* FCNVUF (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvuf(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 6: /* FCNVFU (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfu(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 7: /* FCNVFUT (PA2.0 only) */
+				switch(fmt) {
+				    case 0: /* sgl/sgl */
+					return(sgl_to_sgl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 1: /* sgl/dbl */
+					return(sgl_to_dbl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 2: /* dbl/sgl */
+					return(dbl_to_sgl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				    case 3: /* dbl/dbl */
+					return(dbl_to_dbl_fcnvfut(&fpregs[r1],0,
+						&fpregs[t],status));
+				}
+			case 4: /* undefined */
+				return(MAJOR_0C_EXCP);
+		} /* end of switch subop */
+	case 2: /* class 2 */
+		/*
+		 * Be careful out there.
+		 * Crashme can generate cases where FR31R is specified
+		 * as the source or target of a double precision operation.
+		 * Since we just pass the address of the floating-point
+		 * register to the emulation routines, this can cause
+		 * corruption of fpzeroreg.
+		 */
+		if (fmt == DBL)
+			r2 = (extru(ir,fpr2pos,5)<<1);
+		else
+			r2 = ((extru(ir,fpr2pos,5)<<1)|(extru(ir,fpxr2pos,1)));
+		fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];
+		if (r2 == 0)
+			r2 = fpzeroreg;
+		if  (fpu_type_flags & PA2_0_FPU_FLAG) {
+			/* FTEST if nullify bit set, otherwise FCMP */
+			if (extru(ir, fpnulpos, 1)) {  /* FTEST */
+				/* not legal */
+				return(MAJOR_0E_EXCP);
+			} else {  /* FCMP */
+			switch (fmt) {
+				    /*
+				     * fmt is only 1 bit long
+				     */
+				    case 0:
+					retval = sgl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 1:
+					retval = dbl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				}
+			}
+		}  /* end of if for PA2.0 */
+		else {  /* PA1.0 & PA1.1 */
+		    switch (subop) {
+			case 1:
+			case 2:
+			case 3:
+			case 4:
+			case 5:
+			case 6:
+			case 7:
+				return(MAJOR_0E_EXCP);
+			case 0: /* FCMP */
+				switch (fmt) {
+				    /*
+				     * fmt is only 1 bit long
+				     */
+				    case 0:
+					retval = sgl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				    case 1:
+					retval = dbl_fcmp(&fpregs[r1],
+						&fpregs[r2],extru(ir,fptpos,5),
+						&local_status);
+					update_status_cbit(status,local_status,
+						fpu_type_flags, subop);
+					return(retval);
+				}
+		    } /* end of switch subop */
+		} /* end of else for PA1.0 & PA1.1 */
+	case 3: /* class 3 */
+		/*
+		 * Be careful out there.
+		 * Crashme can generate cases where FR31R is specified
+		 * as the source or target of a double precision operation.
+		 * Since we just pass the address of the floating-point
+		 * register to the emulation routines, this can cause
+		 * corruption of fpzeroreg.
+		 */
+		if (fmt == DBL)
+			r2 = (extru(ir,fpr2pos,5)<<1);
+		else
+			r2 = ((extru(ir,fpr2pos,5)<<1)|(extru(ir,fpxr2pos,1)));
+		if (r2 == 0)
+			r2 = fpzeroreg;
+		switch (subop) {
+			case 5:
+			case 6:
+			case 7:
+				return(MAJOR_0E_EXCP);
+			
+			/*
+			 * Note that fmt is only 1 bit for class 3 */
+			case 0: /* FADD */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fadd(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fadd(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				}
+			case 1: /* FSUB */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fsub(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fsub(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				}
+			case 2: /* FMPY or XMPYU */
+				/*
+				 * check for integer multiply (x bit set)
+				 */
+				if (extru(ir,fpxpos,1)) {
+				    /*
+				     * emulate XMPYU
+				     */
+				    switch (fmt) {
+					case 0:
+					    /*
+					     * bad instruction if t specifies
+					     * the right half of a register
+					     */
+					    if (t & 1)
+						return(MAJOR_0E_EXCP);
+					    BUG();
+					    /* unsupported
+					     * impyu(&fpregs[r1],&fpregs[r2],
+						 * &fpregs[t]);
+					     */
+					    return(NOEXCEPTION);
+					case 1:
+						return(MAJOR_0E_EXCP);
+				    }
+				}
+				else { /* FMPY */
+				    switch (fmt) {
+				        case 0:
+					    return(sgl_fmpy(&fpregs[r1],
+					       &fpregs[r2],&fpregs[t],status));
+				        case 1:
+					    return(dbl_fmpy(&fpregs[r1],
+					       &fpregs[r2],&fpregs[t],status));
+				    }
+				}
+			case 3: /* FDIV */
+				switch (fmt) {
+				    case 0:
+					return(sgl_fdiv(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_fdiv(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				}
+			case 4: /* FREM */
+				switch (fmt) {
+				    case 0:
+					return(sgl_frem(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				    case 1:
+					return(dbl_frem(&fpregs[r1],&fpregs[r2],
+						&fpregs[t],status));
+				}
+		} /* end of class 3 switch */
+	} /* end of switch(class) */
+
+	/* If we get here, something is really wrong! */
+	return(MAJOR_0E_EXCP);
+}
+
+
+/*
+ * routine to decode the 06 (FMPYADD and FMPYCFXT) instruction
+ */
+static u_int
+decode_06(ir,fpregs)
+u_int ir;
+u_int fpregs[];
+{
+	u_int rm1, rm2, tm, ra, ta; /* operands */
+	u_int fmt;
+	u_int error = 0;
+	u_int status;
+	u_int fpu_type_flags;
+	union {
+		double dbl;
+		float flt;
+		struct { u_int i1; u_int i2; } ints;
+	} mtmp, atmp;
+
+
+	status = fpregs[0];		/* use a local copy of status reg */
+	fpu_type_flags=fpregs[FPU_TYPE_FLAG_POS];  /* get fpu type flags */
+	fmt = extru(ir, fpmultifmt, 1);	/* get sgl/dbl flag */
+	if (fmt == 0) { /* DBL */
+		rm1 = extru(ir, fprm1pos, 5) * sizeof(double)/sizeof(u_int);
+		if (rm1 == 0)
+			rm1 = fpzeroreg;
+		rm2 = extru(ir, fprm2pos, 5) * sizeof(double)/sizeof(u_int);
+		if (rm2 == 0)
+			rm2 = fpzeroreg;
+		tm = extru(ir, fptmpos, 5) * sizeof(double)/sizeof(u_int);
+		if (tm == 0)
+			return(MAJOR_06_EXCP);
+		ra = extru(ir, fprapos, 5) * sizeof(double)/sizeof(u_int);
+		ta = extru(ir, fptapos, 5) * sizeof(double)/sizeof(u_int);
+		if (ta == 0)
+			return(MAJOR_06_EXCP);
+
+		if  (fpu_type_flags & TIMEX_ROLEX_FPU_MASK)  {
+
+			if (ra == 0) {
+			 	/* special case FMPYCFXT, see sgl case below */
+				if (dbl_fmpy(&fpregs[rm1],&fpregs[rm2],
+					&mtmp.ints.i1,&status))
+					error = 1;
+				if (dbl_to_sgl_fcnvfxt(&fpregs[ta],
+					&atmp.ints.i1,&atmp.ints.i1,&status))
+					error = 1;
+				}
+			else {
+
+			if (dbl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,
+					&status))
+				error = 1;
+			if (dbl_fadd(&fpregs[ta], &fpregs[ra], &atmp.ints.i1,
+					&status))
+				error = 1;
+				}
+			}
+
+		else
+
+			{
+			if (ra == 0)
+				ra = fpzeroreg;
+
+			if (dbl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,
+					&status))
+				error = 1;
+			if (dbl_fadd(&fpregs[ta], &fpregs[ra], &atmp.ints.i1,
+					&status))
+				error = 1;
+
+			}
+
+		if (error)
+			return(MAJOR_06_EXCP);
+		else {
+			/* copy results */
+			fpregs[tm] = mtmp.ints.i1;
+			fpregs[tm+1] = mtmp.ints.i2;
+			fpregs[ta] = atmp.ints.i1;
+			fpregs[ta+1] = atmp.ints.i2;
+			fpregs[0] = status;
+			return(NOEXCEPTION);
+		}
+	}
+	else { /* SGL */
+		/*
+		 * calculate offsets for single precision numbers
+		 * See table 6-14 in PA-89 architecture for mapping
+		 */
+		rm1 = (extru(ir,fprm1pos,4) | 0x10 ) << 1;	/* get offset */
+		rm1 |= extru(ir,fprm1pos-4,1);	/* add right word offset */
+
+		rm2 = (extru(ir,fprm2pos,4) | 0x10 ) << 1;	/* get offset */
+		rm2 |= extru(ir,fprm2pos-4,1);	/* add right word offset */
+
+		tm = (extru(ir,fptmpos,4) | 0x10 ) << 1;	/* get offset */
+		tm |= extru(ir,fptmpos-4,1);	/* add right word offset */
+
+		ra = (extru(ir,fprapos,4) | 0x10 ) << 1;	/* get offset */
+		ra |= extru(ir,fprapos-4,1);	/* add right word offset */
+
+		ta = (extru(ir,fptapos,4) | 0x10 ) << 1;	/* get offset */
+		ta |= extru(ir,fptapos-4,1);	/* add right word offset */
+		
+		if (ra == 0x20 &&(fpu_type_flags & TIMEX_ROLEX_FPU_MASK)) {
+			/* special case FMPYCFXT (really 0)
+			  * This instruction is only present on the Timex and
+			  * Rolex fpu's in so if it is the special case and
+			  * one of these fpu's we run the FMPYCFXT instruction
+			  */
+			if (sgl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,
+					&status))
+				error = 1;
+			if (sgl_to_sgl_fcnvfxt(&fpregs[ta],&atmp.ints.i1,
+				&atmp.ints.i1,&status))
+				error = 1;
+		}
+		else {
+			if (sgl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,
+					&status))
+				error = 1;
+			if (sgl_fadd(&fpregs[ta], &fpregs[ra], &atmp.ints.i1,
+					&status))
+				error = 1;
+		}
+		if (error)
+			return(MAJOR_06_EXCP);
+		else {
+			/* copy results */
+			fpregs[tm] = mtmp.ints.i1;
+			fpregs[ta] = atmp.ints.i1;
+			fpregs[0] = status;
+			return(NOEXCEPTION);
+		}
+	}
+}
+
+/*
+ * routine to decode the 26 (FMPYSUB) instruction
+ */
+static u_int
+decode_26(ir,fpregs)
+u_int ir;
+u_int fpregs[];
+{
+	u_int rm1, rm2, tm, ra, ta; /* operands */
+	u_int fmt;
+	u_int error = 0;
+	u_int status;
+	union {
+		double dbl;
+		float flt;
+		struct { u_int i1; u_int i2; } ints;
+	} mtmp, atmp;
+
+
+	status = fpregs[0];
+	fmt = extru(ir, fpmultifmt, 1);	/* get sgl/dbl flag */
+	if (fmt == 0) { /* DBL */
+		rm1 = extru(ir, fprm1pos, 5) * sizeof(double)/sizeof(u_int);
+		if (rm1 == 0)
+			rm1 = fpzeroreg;
+		rm2 = extru(ir, fprm2pos, 5) * sizeof(double)/sizeof(u_int);
+		if (rm2 == 0)
+			rm2 = fpzeroreg;
+		tm = extru(ir, fptmpos, 5) * sizeof(double)/sizeof(u_int);
+		if (tm == 0)
+			return(MAJOR_26_EXCP);
+		ra = extru(ir, fprapos, 5) * sizeof(double)/sizeof(u_int);
+		if (ra == 0)
+			return(MAJOR_26_EXCP);
+		ta = extru(ir, fptapos, 5) * sizeof(double)/sizeof(u_int);
+		if (ta == 0)
+			return(MAJOR_26_EXCP);
+		
+		if (dbl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,&status))
+			error = 1;
+		if (dbl_fsub(&fpregs[ta], &fpregs[ra], &atmp.ints.i1,&status))
+			error = 1;
+		if (error)
+			return(MAJOR_26_EXCP);
+		else {
+			/* copy results */
+			fpregs[tm] = mtmp.ints.i1;
+			fpregs[tm+1] = mtmp.ints.i2;
+			fpregs[ta] = atmp.ints.i1;
+			fpregs[ta+1] = atmp.ints.i2;
+			fpregs[0] = status;
+			return(NOEXCEPTION);
+		}
+	}
+	else { /* SGL */
+		/*
+		 * calculate offsets for single precision numbers
+		 * See table 6-14 in PA-89 architecture for mapping
+		 */
+		rm1 = (extru(ir,fprm1pos,4) | 0x10 ) << 1;	/* get offset */
+		rm1 |= extru(ir,fprm1pos-4,1);	/* add right word offset */
+
+		rm2 = (extru(ir,fprm2pos,4) | 0x10 ) << 1;	/* get offset */
+		rm2 |= extru(ir,fprm2pos-4,1);	/* add right word offset */
+
+		tm = (extru(ir,fptmpos,4) | 0x10 ) << 1;	/* get offset */
+		tm |= extru(ir,fptmpos-4,1);	/* add right word offset */
+
+		ra = (extru(ir,fprapos,4) | 0x10 ) << 1;	/* get offset */
+		ra |= extru(ir,fprapos-4,1);	/* add right word offset */
+
+		ta = (extru(ir,fptapos,4) | 0x10 ) << 1;	/* get offset */
+		ta |= extru(ir,fptapos-4,1);	/* add right word offset */
+		
+		if (sgl_fmpy(&fpregs[rm1],&fpregs[rm2],&mtmp.ints.i1,&status))
+			error = 1;
+		if (sgl_fsub(&fpregs[ta], &fpregs[ra], &atmp.ints.i1,&status))
+			error = 1;
+		if (error)
+			return(MAJOR_26_EXCP);
+		else {
+			/* copy results */
+			fpregs[tm] = mtmp.ints.i1;
+			fpregs[ta] = atmp.ints.i1;
+			fpregs[0] = status;
+			return(NOEXCEPTION);
+		}
+	}
+
+}
+
+/*
+ * routine to decode the 2E (FMPYFADD,FMPYNFADD) instructions
+ */
+static u_int
+decode_2e(ir,fpregs)
+u_int ir;
+u_int fpregs[];
+{
+	u_int rm1, rm2, ra, t; /* operands */
+	u_int fmt;
+
+	fmt = extru(ir,fpfmtpos,1);	/* get fmt completer */
+	if (fmt == DBL) { /* DBL */
+		rm1 = extru(ir,fprm1pos,5) * sizeof(double)/sizeof(u_int);
+		if (rm1 == 0)
+			rm1 = fpzeroreg;
+		rm2 = extru(ir,fprm2pos,5) * sizeof(double)/sizeof(u_int);
+		if (rm2 == 0)
+			rm2 = fpzeroreg;
+		ra = ((extru(ir,fpraupos,3)<<2)|(extru(ir,fpralpos,3)>>1)) *
+		     sizeof(double)/sizeof(u_int);
+		if (ra == 0)
+			ra = fpzeroreg;
+		t = extru(ir,fptpos,5) * sizeof(double)/sizeof(u_int);
+		if (t == 0)
+			return(MAJOR_2E_EXCP);
+
+		if (extru(ir,fpfusedsubop,1)) { /* fmpyfadd or fmpynfadd? */
+			return(dbl_fmpynfadd(&fpregs[rm1], &fpregs[rm2],
+					&fpregs[ra], &fpregs[0], &fpregs[t]));
+		} else {
+			return(dbl_fmpyfadd(&fpregs[rm1], &fpregs[rm2],
+					&fpregs[ra], &fpregs[0], &fpregs[t]));
+		}
+	} /* end DBL */
+	else { /* SGL */
+		rm1 = (extru(ir,fprm1pos,5)<<1)|(extru(ir,fpxrm1pos,1));
+		if (rm1 == 0)
+			rm1 = fpzeroreg;
+		rm2 = (extru(ir,fprm2pos,5)<<1)|(extru(ir,fpxrm2pos,1));
+		if (rm2 == 0)
+			rm2 = fpzeroreg;
+		ra = (extru(ir,fpraupos,3)<<3)|extru(ir,fpralpos,3);
+		if (ra == 0)
+			ra = fpzeroreg;
+		t = ((extru(ir,fptpos,5)<<1)|(extru(ir,fpxtpos,1)));
+		if (t == 0)
+			return(MAJOR_2E_EXCP);
+
+		if (extru(ir,fpfusedsubop,1)) { /* fmpyfadd or fmpynfadd? */
+			return(sgl_fmpynfadd(&fpregs[rm1], &fpregs[rm2],
+					&fpregs[ra], &fpregs[0], &fpregs[t]));
+		} else {
+			return(sgl_fmpyfadd(&fpregs[rm1], &fpregs[rm2],
+					&fpregs[ra], &fpregs[0], &fpregs[t]));
+		}
+	} /* end SGL */
+}
+
+/*
+ * update_status_cbit
+ *
+ *	This routine returns the correct FP status register value in
+ *	*status, based on the C-bit & V-bit returned by the FCMP
+ *	emulation routine in new_status.  The architecture type
+ *	(PA83, PA89 or PA2.0) is available in fpu_type.  The y_field
+ *	and the architecture type are used to determine what flavor
+ *	of FCMP is being emulated.
+ */
+static void
+update_status_cbit(status, new_status, fpu_type, y_field)
+u_int *status, new_status;
+u_int fpu_type;
+u_int y_field;
+{
+	/*
+	 * For PA89 FPU's which implement the Compare Queue and
+	 * for PA2.0 FPU's, update the Compare Queue if the y-field = 0,
+	 * otherwise update the specified bit in the Compare Array.
+	 * Note that the y-field will always be 0 for non-PA2.0 FPU's.
+	 */
+	if ((fpu_type & TIMEX_EXTEN_FLAG) || 
+	    (fpu_type & ROLEX_EXTEN_FLAG) ||
+	    (fpu_type & PA2_0_FPU_FLAG)) {
+		if (y_field == 0) {
+			*status = ((*status & 0x04000000) >> 5) | /* old Cbit */
+				  ((*status & 0x003ff000) >> 1) | /* old CQ   */
+				  (new_status & 0xffc007ff); /* all other bits*/
+		} else {
+			*status = (*status & 0x04000000) |     /* old Cbit */
+				  ((new_status & 0x04000000) >> (y_field+4)) |
+				  (new_status & ~0x04000000 &  /* other bits */
+				   ~(0x04000000 >> (y_field+4)));
+		}
+	}
+	/* if PA83, just update the C-bit */
+	else {
+		*status = new_status;
+	}
+}