; Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
;
; Licensed under the OpenSSL license (the "License").  You may not use
; this file except in compliance with the License.  You can obtain a copy
; in the file LICENSE in the source distribution or at
; https://www.openssl.org/source/license.html
;
; PA-RISC 2.0 implementation of bn_asm code, based on the
; 64-bit version of the code.  This code is effectively the
; same as the 64-bit version except the register model is
; slightly different given all values must be 32-bit between
; function calls.  Thus the 64-bit return values are returned
; in %ret0 and %ret1 vs just %ret0 as is done in 64-bit
;
;
; This code is approximately 2x faster than the C version
; for RSA/DSA.
;
; See http://devresource.hp.com/  for more details on the PA-RISC
; architecture.  Also see the book "PA-RISC 2.0 Architecture"
; by Gerry Kane for information on the instruction set architecture.
;
; Code written by Chris Ruemmler (with some help from the HP C
; compiler).
;
; The code compiles with HP's assembler
;

	.level	2.0N
	.space	$TEXT$
	.subspa	$CODE$,QUAD=0,ALIGN=8,ACCESS=0x2c,CODE_ONLY

;
; Global Register definitions used for the routines.
;
; Some information about HP's runtime architecture for 32-bits.
;
; "Caller save" means the calling function must save the register
; if it wants the register to be preserved.
; "Callee save" means if a function uses the register, it must save
; the value before using it.
;
; For the floating point registers 
;
;    "caller save" registers: fr4-fr11, fr22-fr31
;    "callee save" registers: fr12-fr21
;    "special" registers: fr0-fr3 (status and exception registers)
;
; For the integer registers
;     value zero             :  r0
;     "caller save" registers: r1,r19-r26
;     "callee save" registers: r3-r18
;     return register        :  r2  (rp)
;     return values          ; r28,r29  (ret0,ret1)
;     Stack pointer          ; r30  (sp) 
;     millicode return ptr   ; r31  (also a caller save register)


;
; Arguments to the routines
;
r_ptr       .reg %r26
a_ptr       .reg %r25
b_ptr       .reg %r24
num         .reg %r24
n           .reg %r23

;
; Note that the "w" argument for bn_mul_add_words and bn_mul_words
; is passed on the stack at a delta of -56 from the top of stack
; as the routine is entered.
;

;
; Globals used in some routines
;

top_overflow .reg %r23
high_mask    .reg %r22    ; value 0xffffffff80000000L


;------------------------------------------------------------------------------
;
; bn_mul_add_words
;
;BN_ULONG bn_mul_add_words(BN_ULONG *r_ptr, BN_ULONG *a_ptr, 
;								int num, BN_ULONG w)
;
; arg0 = r_ptr
; arg1 = a_ptr
; arg3 = num
; -56(sp) =  w
;
; Local register definitions
;

fm1          .reg %fr22
fm           .reg %fr23
ht_temp      .reg %fr24
ht_temp_1    .reg %fr25
lt_temp      .reg %fr26
lt_temp_1    .reg %fr27
fm1_1        .reg %fr28
fm_1         .reg %fr29

fw_h         .reg %fr7L
fw_l         .reg %fr7R
fw           .reg %fr7

fht_0        .reg %fr8L
flt_0        .reg %fr8R
t_float_0    .reg %fr8

fht_1        .reg %fr9L
flt_1        .reg %fr9R
t_float_1    .reg %fr9

tmp_0        .reg %r31
tmp_1        .reg %r21
m_0          .reg %r20 
m_1          .reg %r19 
ht_0         .reg %r1  
ht_1         .reg %r3
lt_0         .reg %r4
lt_1         .reg %r5
m1_0         .reg %r6 
m1_1         .reg %r7 
rp_val       .reg %r8
rp_val_1     .reg %r9

bn_mul_add_words
	.export	bn_mul_add_words,entry,NO_RELOCATION,LONG_RETURN
	.proc
	.callinfo frame=128
    .entry
	.align 64

    STD     %r3,0(%sp)          ; save r3  
    STD     %r4,8(%sp)          ; save r4  
	NOP                         ; Needed to make the loop 16-byte aligned
	NOP                         ; needed to make the loop 16-byte aligned

    STD     %r5,16(%sp)         ; save r5  
	NOP
    STD     %r6,24(%sp)         ; save r6  
    STD     %r7,32(%sp)         ; save r7  

    STD     %r8,40(%sp)         ; save r8  
    STD     %r9,48(%sp)         ; save r9  
    COPY    %r0,%ret1           ; return 0 by default
    DEPDI,Z 1,31,1,top_overflow ; top_overflow = 1 << 32    

    CMPIB,>= 0,num,bn_mul_add_words_exit  ; if (num <= 0) then exit
	LDO     128(%sp),%sp        ; bump stack

	;
	; The loop is unrolled twice, so if there is only 1 number
    ; then go straight to the cleanup code.
	;
	CMPIB,= 1,num,bn_mul_add_words_single_top
	FLDD    -184(%sp),fw        ; (-56-128) load up w into fw (fw_h/fw_l)

	;
	; This loop is unrolled 2 times (64-byte aligned as well)
	;
	; PA-RISC 2.0 chips have two fully pipelined multipliers, thus
    ; two 32-bit mutiplies can be issued per cycle.
    ; 
bn_mul_add_words_unroll2

    FLDD    0(a_ptr),t_float_0       ; load up 64-bit value (fr8L) ht(L)/lt(R)
    FLDD    8(a_ptr),t_float_1       ; load up 64-bit value (fr8L) ht(L)/lt(R)
    LDD     0(r_ptr),rp_val          ; rp[0]
    LDD     8(r_ptr),rp_val_1        ; rp[1]

    XMPYU   fht_0,fw_l,fm1           ; m1[0] = fht_0*fw_l
    XMPYU   fht_1,fw_l,fm1_1         ; m1[1] = fht_1*fw_l
    FSTD    fm1,-16(%sp)             ; -16(sp) = m1[0]
    FSTD    fm1_1,-48(%sp)           ; -48(sp) = m1[1]

    XMPYU   flt_0,fw_h,fm            ; m[0] = flt_0*fw_h
    XMPYU   flt_1,fw_h,fm_1          ; m[1] = flt_1*fw_h
    FSTD    fm,-8(%sp)               ; -8(sp) = m[0]
    FSTD    fm_1,-40(%sp)            ; -40(sp) = m[1]

    XMPYU   fht_0,fw_h,ht_temp       ; ht_temp   = fht_0*fw_h
    XMPYU   fht_1,fw_h,ht_temp_1     ; ht_temp_1 = fht_1*fw_h
    FSTD    ht_temp,-24(%sp)         ; -24(sp)   = ht_temp
    FSTD    ht_temp_1,-56(%sp)       ; -56(sp)   = ht_temp_1

    XMPYU   flt_0,fw_l,lt_temp       ; lt_temp = lt*fw_l
    XMPYU   flt_1,fw_l,lt_temp_1     ; lt_temp = lt*fw_l
    FSTD    lt_temp,-32(%sp)         ; -32(sp) = lt_temp 
    FSTD    lt_temp_1,-64(%sp)       ; -64(sp) = lt_temp_1 

    LDD     -8(%sp),m_0              ; m[0] 
    LDD     -40(%sp),m_1             ; m[1]
    LDD     -16(%sp),m1_0            ; m1[0]
    LDD     -48(%sp),m1_1            ; m1[1]

    LDD     -24(%sp),ht_0            ; ht[0]
    LDD     -56(%sp),ht_1            ; ht[1]
    ADD,L   m1_0,m_0,tmp_0           ; tmp_0 = m[0] + m1[0]; 
    ADD,L   m1_1,m_1,tmp_1           ; tmp_1 = m[1] + m1[1]; 

    LDD     -32(%sp),lt_0            
    LDD     -64(%sp),lt_1            
    CMPCLR,*>>= tmp_0,m1_0, %r0      ; if (m[0] < m1[0])
    ADD,L   ht_0,top_overflow,ht_0   ; ht[0] += (1<<32)

    CMPCLR,*>>= tmp_1,m1_1,%r0       ; if (m[1] < m1[1])
    ADD,L   ht_1,top_overflow,ht_1   ; ht[1] += (1<<32)
    EXTRD,U tmp_0,31,32,m_0          ; m[0]>>32  
    DEPD,Z  tmp_0,31,32,m1_0         ; m1[0] = m[0]<<32 

    EXTRD,U tmp_1,31,32,m_1          ; m[1]>>32  
    DEPD,Z  tmp_1,31,32,m1_1         ; m1[1] = m[1]<<32 
    ADD,L   ht_0,m_0,ht_0            ; ht[0]+= (m[0]>>32)
    ADD,L   ht_1,m_1,ht_1            ; ht[1]+= (m[1]>>32)

    ADD     lt_0,m1_0,lt_0           ; lt[0] = lt[0]+m1[0];
	ADD,DC  ht_0,%r0,ht_0            ; ht[0]++
    ADD     lt_1,m1_1,lt_1           ; lt[1] = lt[1]+m1[1];
    ADD,DC  ht_1,%r0,ht_1            ; ht[1]++

    ADD    %ret1,lt_0,lt_0           ; lt[0] = lt[0] + c;
	ADD,DC  ht_0,%r0,ht_0            ; ht[0]++
    ADD     lt_0,rp_val,lt_0         ; lt[0] = lt[0]+rp[0]
    ADD,DC  ht_0,%r0,ht_0            ; ht[0]++

	LDO    -2(num),num               ; num = num - 2;
    ADD     ht_0,lt_1,lt_1           ; lt[1] = lt[1] + ht_0 (c);
    ADD,DC  ht_1,%r0,ht_1            ; ht[1]++
    STD     lt_0,0(r_ptr)            ; rp[0] = lt[0]

    ADD     lt_1,rp_val_1,lt_1       ; lt[1] = lt[1]+rp[1]
    ADD,DC  ht_1,%r0,%ret1           ; ht[1]++
    LDO     16(a_ptr),a_ptr          ; a_ptr += 2

    STD     lt_1,8(r_ptr)            ; rp[1] = lt[1]
	CMPIB,<= 2,num,bn_mul_add_words_unroll2 ; go again if more to do
    LDO     16(r_ptr),r_ptr          ; r_ptr += 2

    CMPIB,=,N 0,num,bn_mul_add_words_exit ; are we done, or cleanup last one

	;
	; Top of loop aligned on 64-byte boundary
	;
bn_mul_add_words_single_top
    FLDD    0(a_ptr),t_float_0        ; load up 64-bit value (fr8L) ht(L)/lt(R)
    LDD     0(r_ptr),rp_val           ; rp[0]
    LDO     8(a_ptr),a_ptr            ; a_ptr++
    XMPYU   fht_0,fw_l,fm1            ; m1 = ht*fw_l
    FSTD    fm1,-16(%sp)              ; -16(sp) = m1
    XMPYU   flt_0,fw_h,fm             ; m = lt*fw_h
    FSTD    fm,-8(%sp)                ; -8(sp) = m
    XMPYU   fht_0,fw_h,ht_temp        ; ht_temp = ht*fw_h
    FSTD    ht_temp,-24(%sp)          ; -24(sp) = ht
    XMPYU   flt_0,fw_l,lt_temp        ; lt_temp = lt*fw_l
    FSTD    lt_temp,-32(%sp)          ; -32(sp) = lt 

    LDD     -8(%sp),m_0               
    LDD    -16(%sp),m1_0              ; m1 = temp1 
    ADD,L   m_0,m1_0,tmp_0            ; tmp_0 = m + m1; 
    LDD     -24(%sp),ht_0             
    LDD     -32(%sp),lt_0             

    CMPCLR,*>>= tmp_0,m1_0,%r0        ; if (m < m1)
    ADD,L   ht_0,top_overflow,ht_0    ; ht += (1<<32)

    EXTRD,U tmp_0,31,32,m_0           ; m>>32  
    DEPD,Z  tmp_0,31,32,m1_0          ; m1 = m<<32 

    ADD,L   ht_0,m_0,ht_0             ; ht+= (m>>32)
    ADD     lt_0,m1_0,tmp_0           ; tmp_0 = lt+m1;
    ADD,DC  ht_0,%r0,ht_0             ; ht++
    ADD     %ret1,tmp_0,lt_0          ; lt = lt + c;
    ADD,DC  ht_0,%r0,ht_0             ; ht++
    ADD     lt_0,rp_val,lt_0          ; lt = lt+rp[0]
    ADD,DC  ht_0,%r0,%ret1            ; ht++
    STD     lt_0,0(r_ptr)             ; rp[0] = lt

bn_mul_add_words_exit
    .EXIT
	
    EXTRD,U %ret1,31,32,%ret0         ; for 32-bit, return in ret0/ret1
    LDD     -80(%sp),%r9              ; restore r9  
    LDD     -88(%sp),%r8              ; restore r8  
    LDD     -96(%sp),%r7              ; restore r7  
    LDD     -104(%sp),%r6             ; restore r6  
    LDD     -112(%sp),%r5             ; restore r5  
    LDD     -120(%sp),%r4             ; restore r4  
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3             ; restore r3
	.PROCEND	;in=23,24,25,26,29;out=28;

;----------------------------------------------------------------------------
;
;BN_ULONG bn_mul_words(BN_ULONG *rp, BN_ULONG *ap, int num, BN_ULONG w)
;
; arg0 = rp
; arg1 = ap
; arg3 = num
; w on stack at -56(sp)

bn_mul_words
	.proc
	.callinfo frame=128
    .entry
	.EXPORT	bn_mul_words,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
	.align 64

    STD     %r3,0(%sp)          ; save r3  
    STD     %r4,8(%sp)          ; save r4  
	NOP
    STD     %r5,16(%sp)         ; save r5  

    STD     %r6,24(%sp)         ; save r6  
    STD     %r7,32(%sp)         ; save r7  
    COPY    %r0,%ret1           ; return 0 by default
    DEPDI,Z 1,31,1,top_overflow ; top_overflow = 1 << 32    

    CMPIB,>= 0,num,bn_mul_words_exit
	LDO     128(%sp),%sp    ; bump stack

	;
	; See if only 1 word to do, thus just do cleanup
	;
	CMPIB,= 1,num,bn_mul_words_single_top
	FLDD    -184(%sp),fw        ; (-56-128) load up w into fw (fw_h/fw_l)

	;
	; This loop is unrolled 2 times (64-byte aligned as well)
	;
	; PA-RISC 2.0 chips have two fully pipelined multipliers, thus
    ; two 32-bit mutiplies can be issued per cycle.
    ; 
bn_mul_words_unroll2

    FLDD    0(a_ptr),t_float_0        ; load up 64-bit value (fr8L) ht(L)/lt(R)
    FLDD    8(a_ptr),t_float_1        ; load up 64-bit value (fr8L) ht(L)/lt(R)
    XMPYU   fht_0,fw_l,fm1            ; m1[0] = fht_0*fw_l
    XMPYU   fht_1,fw_l,fm1_1          ; m1[1] = ht*fw_l

    FSTD    fm1,-16(%sp)              ; -16(sp) = m1
    FSTD    fm1_1,-48(%sp)            ; -48(sp) = m1
    XMPYU   flt_0,fw_h,fm             ; m = lt*fw_h
    XMPYU   flt_1,fw_h,fm_1           ; m = lt*fw_h

    FSTD    fm,-8(%sp)                ; -8(sp) = m
    FSTD    fm_1,-40(%sp)             ; -40(sp) = m
    XMPYU   fht_0,fw_h,ht_temp        ; ht_temp = fht_0*fw_h
    XMPYU   fht_1,fw_h,ht_temp_1      ; ht_temp = ht*fw_h

    FSTD    ht_temp,-24(%sp)          ; -24(sp) = ht
    FSTD    ht_temp_1,-56(%sp)        ; -56(sp) = ht
    XMPYU   flt_0,fw_l,lt_temp        ; lt_temp = lt*fw_l
    XMPYU   flt_1,fw_l,lt_temp_1      ; lt_temp = lt*fw_l

    FSTD    lt_temp,-32(%sp)          ; -32(sp) = lt 
    FSTD    lt_temp_1,-64(%sp)        ; -64(sp) = lt 
    LDD     -8(%sp),m_0               
    LDD     -40(%sp),m_1              

    LDD    -16(%sp),m1_0              
    LDD    -48(%sp),m1_1              
    LDD     -24(%sp),ht_0             
    LDD     -56(%sp),ht_1             

    ADD,L   m1_0,m_0,tmp_0            ; tmp_0 = m + m1; 
    ADD,L   m1_1,m_1,tmp_1            ; tmp_1 = m + m1; 
    LDD     -32(%sp),lt_0             
    LDD     -64(%sp),lt_1             

    CMPCLR,*>>= tmp_0,m1_0, %r0       ; if (m < m1)
    ADD,L   ht_0,top_overflow,ht_0    ; ht += (1<<32)
    CMPCLR,*>>= tmp_1,m1_1,%r0        ; if (m < m1)
    ADD,L   ht_1,top_overflow,ht_1    ; ht += (1<<32)

    EXTRD,U tmp_0,31,32,m_0           ; m>>32  
    DEPD,Z  tmp_0,31,32,m1_0          ; m1 = m<<32 
    EXTRD,U tmp_1,31,32,m_1           ; m>>32  
    DEPD,Z  tmp_1,31,32,m1_1          ; m1 = m<<32 

    ADD,L   ht_0,m_0,ht_0             ; ht+= (m>>32)
    ADD,L   ht_1,m_1,ht_1             ; ht+= (m>>32)
    ADD     lt_0,m1_0,lt_0            ; lt = lt+m1;
	ADD,DC  ht_0,%r0,ht_0             ; ht++

    ADD     lt_1,m1_1,lt_1            ; lt = lt+m1;
    ADD,DC  ht_1,%r0,ht_1             ; ht++
    ADD    %ret1,lt_0,lt_0            ; lt = lt + c (ret1);
	ADD,DC  ht_0,%r0,ht_0             ; ht++

    ADD     ht_0,lt_1,lt_1            ; lt = lt + c (ht_0)
    ADD,DC  ht_1,%r0,ht_1             ; ht++
    STD     lt_0,0(r_ptr)             ; rp[0] = lt
    STD     lt_1,8(r_ptr)             ; rp[1] = lt

	COPY    ht_1,%ret1                ; carry = ht
	LDO    -2(num),num                ; num = num - 2;
    LDO     16(a_ptr),a_ptr           ; ap += 2
	CMPIB,<= 2,num,bn_mul_words_unroll2
    LDO     16(r_ptr),r_ptr           ; rp++

    CMPIB,=,N 0,num,bn_mul_words_exit ; are we done?

	;
	; Top of loop aligned on 64-byte boundary
	;
bn_mul_words_single_top
    FLDD    0(a_ptr),t_float_0        ; load up 64-bit value (fr8L) ht(L)/lt(R)

    XMPYU   fht_0,fw_l,fm1            ; m1 = ht*fw_l
    FSTD    fm1,-16(%sp)              ; -16(sp) = m1
    XMPYU   flt_0,fw_h,fm             ; m = lt*fw_h
    FSTD    fm,-8(%sp)                ; -8(sp) = m
    XMPYU   fht_0,fw_h,ht_temp        ; ht_temp = ht*fw_h
    FSTD    ht_temp,-24(%sp)          ; -24(sp) = ht
    XMPYU   flt_0,fw_l,lt_temp        ; lt_temp = lt*fw_l
    FSTD    lt_temp,-32(%sp)          ; -32(sp) = lt 

    LDD     -8(%sp),m_0               
    LDD    -16(%sp),m1_0              
    ADD,L   m_0,m1_0,tmp_0            ; tmp_0 = m + m1; 
    LDD     -24(%sp),ht_0             
    LDD     -32(%sp),lt_0             

    CMPCLR,*>>= tmp_0,m1_0,%r0        ; if (m < m1)
    ADD,L   ht_0,top_overflow,ht_0    ; ht += (1<<32)

    EXTRD,U tmp_0,31,32,m_0           ; m>>32  
    DEPD,Z  tmp_0,31,32,m1_0          ; m1 = m<<32 

    ADD,L   ht_0,m_0,ht_0             ; ht+= (m>>32)
    ADD     lt_0,m1_0,lt_0            ; lt= lt+m1;
    ADD,DC  ht_0,%r0,ht_0             ; ht++

    ADD     %ret1,lt_0,lt_0           ; lt = lt + c;
    ADD,DC  ht_0,%r0,ht_0             ; ht++

    COPY    ht_0,%ret1                ; copy carry
    STD     lt_0,0(r_ptr)             ; rp[0] = lt

bn_mul_words_exit
    .EXIT
    EXTRD,U %ret1,31,32,%ret0           ; for 32-bit, return in ret0/ret1
    LDD     -96(%sp),%r7              ; restore r7  
    LDD     -104(%sp),%r6             ; restore r6  
    LDD     -112(%sp),%r5             ; restore r5  
    LDD     -120(%sp),%r4             ; restore r4  
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3             ; restore r3
	.PROCEND	

;----------------------------------------------------------------------------
;
;void bn_sqr_words(BN_ULONG *rp, BN_ULONG *ap, int num)
;
; arg0 = rp
; arg1 = ap
; arg2 = num
;

bn_sqr_words
	.proc
	.callinfo FRAME=128,ENTRY_GR=%r3,ARGS_SAVED,ORDERING_AWARE
	.EXPORT	bn_sqr_words,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .entry
	.align 64

    STD     %r3,0(%sp)          ; save r3  
    STD     %r4,8(%sp)          ; save r4  
	NOP
    STD     %r5,16(%sp)         ; save r5  

    CMPIB,>= 0,num,bn_sqr_words_exit
	LDO     128(%sp),%sp       ; bump stack

	;
	; If only 1, the goto straight to cleanup
	;
	CMPIB,= 1,num,bn_sqr_words_single_top
    DEPDI,Z -1,32,33,high_mask   ; Create Mask 0xffffffff80000000L

	;
	; This loop is unrolled 2 times (64-byte aligned as well)
	;

bn_sqr_words_unroll2
    FLDD    0(a_ptr),t_float_0        ; a[0]
    FLDD    8(a_ptr),t_float_1        ; a[1]
    XMPYU   fht_0,flt_0,fm            ; m[0]
    XMPYU   fht_1,flt_1,fm_1          ; m[1]

    FSTD    fm,-24(%sp)               ; store m[0]
    FSTD    fm_1,-56(%sp)             ; store m[1]
    XMPYU   flt_0,flt_0,lt_temp       ; lt[0]
    XMPYU   flt_1,flt_1,lt_temp_1     ; lt[1]

    FSTD    lt_temp,-16(%sp)          ; store lt[0]
    FSTD    lt_temp_1,-48(%sp)        ; store lt[1]
    XMPYU   fht_0,fht_0,ht_temp       ; ht[0]
    XMPYU   fht_1,fht_1,ht_temp_1     ; ht[1]

    FSTD    ht_temp,-8(%sp)           ; store ht[0]
    FSTD    ht_temp_1,-40(%sp)        ; store ht[1]
    LDD     -24(%sp),m_0             
    LDD     -56(%sp),m_1              

    AND     m_0,high_mask,tmp_0       ; m[0] & Mask
    AND     m_1,high_mask,tmp_1       ; m[1] & Mask
    DEPD,Z  m_0,30,31,m_0             ; m[0] << 32+1
    DEPD,Z  m_1,30,31,m_1             ; m[1] << 32+1

    LDD     -16(%sp),lt_0        
    LDD     -48(%sp),lt_1        
    EXTRD,U tmp_0,32,33,tmp_0         ; tmp_0 = m[0]&Mask >> 32-1
    EXTRD,U tmp_1,32,33,tmp_1         ; tmp_1 = m[1]&Mask >> 32-1

    LDD     -8(%sp),ht_0            
    LDD     -40(%sp),ht_1           
    ADD,L   ht_0,tmp_0,ht_0           ; ht[0] += tmp_0
    ADD,L   ht_1,tmp_1,ht_1           ; ht[1] += tmp_1

    ADD     lt_0,m_0,lt_0             ; lt = lt+m
    ADD,DC  ht_0,%r0,ht_0             ; ht[0]++
    STD     lt_0,0(r_ptr)             ; rp[0] = lt[0]
    STD     ht_0,8(r_ptr)             ; rp[1] = ht[1]

    ADD     lt_1,m_1,lt_1             ; lt = lt+m
    ADD,DC  ht_1,%r0,ht_1             ; ht[1]++
    STD     lt_1,16(r_ptr)            ; rp[2] = lt[1]
    STD     ht_1,24(r_ptr)            ; rp[3] = ht[1]

	LDO    -2(num),num                ; num = num - 2;
    LDO     16(a_ptr),a_ptr           ; ap += 2
	CMPIB,<= 2,num,bn_sqr_words_unroll2
    LDO     32(r_ptr),r_ptr           ; rp += 4

    CMPIB,=,N 0,num,bn_sqr_words_exit ; are we done?

	;
	; Top of loop aligned on 64-byte boundary
	;
bn_sqr_words_single_top
    FLDD    0(a_ptr),t_float_0        ; load up 64-bit value (fr8L) ht(L)/lt(R)

    XMPYU   fht_0,flt_0,fm            ; m
    FSTD    fm,-24(%sp)               ; store m

    XMPYU   flt_0,flt_0,lt_temp       ; lt
    FSTD    lt_temp,-16(%sp)          ; store lt

    XMPYU   fht_0,fht_0,ht_temp       ; ht
    FSTD    ht_temp,-8(%sp)           ; store ht

    LDD     -24(%sp),m_0              ; load m
    AND     m_0,high_mask,tmp_0       ; m & Mask
    DEPD,Z  m_0,30,31,m_0             ; m << 32+1
    LDD     -16(%sp),lt_0             ; lt

    LDD     -8(%sp),ht_0              ; ht
    EXTRD,U tmp_0,32,33,tmp_0         ; tmp_0 = m&Mask >> 32-1
    ADD     m_0,lt_0,lt_0             ; lt = lt+m
    ADD,L   ht_0,tmp_0,ht_0           ; ht += tmp_0
    ADD,DC  ht_0,%r0,ht_0             ; ht++

    STD     lt_0,0(r_ptr)             ; rp[0] = lt
    STD     ht_0,8(r_ptr)             ; rp[1] = ht

bn_sqr_words_exit
    .EXIT
    LDD     -112(%sp),%r5       ; restore r5  
    LDD     -120(%sp),%r4       ; restore r4  
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3 
	.PROCEND	;in=23,24,25,26,29;out=28;


;----------------------------------------------------------------------------
;
;BN_ULONG bn_add_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
;
; arg0 = rp 
; arg1 = ap
; arg2 = bp 
; arg3 = n

t  .reg %r22
b  .reg %r21
l  .reg %r20

bn_add_words
	.proc
    .entry
	.callinfo
	.EXPORT	bn_add_words,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
	.align 64

    CMPIB,>= 0,n,bn_add_words_exit
    COPY    %r0,%ret1           ; return 0 by default

	;
	; If 2 or more numbers do the loop
	;
	CMPIB,= 1,n,bn_add_words_single_top
	NOP

	;
	; This loop is unrolled 2 times (64-byte aligned as well)
	;
bn_add_words_unroll2
	LDD     0(a_ptr),t
	LDD     0(b_ptr),b
	ADD     t,%ret1,t                    ; t = t+c;
	ADD,DC  %r0,%r0,%ret1                ; set c to carry
	ADD     t,b,l                        ; l = t + b[0]
	ADD,DC  %ret1,%r0,%ret1              ; c+= carry
	STD     l,0(r_ptr)

	LDD     8(a_ptr),t
	LDD     8(b_ptr),b
	ADD     t,%ret1,t                     ; t = t+c;
	ADD,DC  %r0,%r0,%ret1                 ; set c to carry
	ADD     t,b,l                         ; l = t + b[0]
	ADD,DC  %ret1,%r0,%ret1               ; c+= carry
	STD     l,8(r_ptr)

	LDO     -2(n),n
	LDO     16(a_ptr),a_ptr
	LDO     16(b_ptr),b_ptr

	CMPIB,<= 2,n,bn_add_words_unroll2
	LDO     16(r_ptr),r_ptr

    CMPIB,=,N 0,n,bn_add_words_exit ; are we done?

bn_add_words_single_top
	LDD     0(a_ptr),t
	LDD     0(b_ptr),b

	ADD     t,%ret1,t                 ; t = t+c;
	ADD,DC  %r0,%r0,%ret1             ; set c to carry (could use CMPCLR??)
	ADD     t,b,l                     ; l = t + b[0]
	ADD,DC  %ret1,%r0,%ret1           ; c+= carry
	STD     l,0(r_ptr)

bn_add_words_exit
    .EXIT
    BVE     (%rp)
    EXTRD,U %ret1,31,32,%ret0           ; for 32-bit, return in ret0/ret1
	.PROCEND	;in=23,24,25,26,29;out=28;

;----------------------------------------------------------------------------
;
;BN_ULONG bn_sub_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
;
; arg0 = rp 
; arg1 = ap
; arg2 = bp 
; arg3 = n

t1       .reg %r22
t2       .reg %r21
sub_tmp1 .reg %r20
sub_tmp2 .reg %r19


bn_sub_words
	.proc
	.callinfo 
	.EXPORT	bn_sub_words,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .entry
	.align 64

    CMPIB,>=  0,n,bn_sub_words_exit
    COPY    %r0,%ret1           ; return 0 by default

	;
	; If 2 or more numbers do the loop
	;
	CMPIB,= 1,n,bn_sub_words_single_top
	NOP

	;
	; This loop is unrolled 2 times (64-byte aligned as well)
	;
bn_sub_words_unroll2
	LDD     0(a_ptr),t1
	LDD     0(b_ptr),t2
	SUB     t1,t2,sub_tmp1           ; t3 = t1-t2; 
	SUB     sub_tmp1,%ret1,sub_tmp1  ; t3 = t3- c; 

	CMPCLR,*>> t1,t2,sub_tmp2        ; clear if t1 > t2
	LDO      1(%r0),sub_tmp2
	
	CMPCLR,*= t1,t2,%r0
	COPY    sub_tmp2,%ret1
	STD     sub_tmp1,0(r_ptr)

	LDD     8(a_ptr),t1
	LDD     8(b_ptr),t2
	SUB     t1,t2,sub_tmp1            ; t3 = t1-t2; 
	SUB     sub_tmp1,%ret1,sub_tmp1   ; t3 = t3- c; 
	CMPCLR,*>> t1,t2,sub_tmp2         ; clear if t1 > t2
	LDO      1(%r0),sub_tmp2
	
	CMPCLR,*= t1,t2,%r0
	COPY    sub_tmp2,%ret1
	STD     sub_tmp1,8(r_ptr)

	LDO     -2(n),n
	LDO     16(a_ptr),a_ptr
	LDO     16(b_ptr),b_ptr

	CMPIB,<= 2,n,bn_sub_words_unroll2
	LDO     16(r_ptr),r_ptr

    CMPIB,=,N 0,n,bn_sub_words_exit ; are we done?

bn_sub_words_single_top
	LDD     0(a_ptr),t1
	LDD     0(b_ptr),t2
	SUB     t1,t2,sub_tmp1            ; t3 = t1-t2; 
	SUB     sub_tmp1,%ret1,sub_tmp1   ; t3 = t3- c; 
	CMPCLR,*>> t1,t2,sub_tmp2         ; clear if t1 > t2
	LDO      1(%r0),sub_tmp2
	
	CMPCLR,*= t1,t2,%r0
	COPY    sub_tmp2,%ret1

	STD     sub_tmp1,0(r_ptr)

bn_sub_words_exit
    .EXIT
    BVE     (%rp)
    EXTRD,U %ret1,31,32,%ret0           ; for 32-bit, return in ret0/ret1
	.PROCEND	;in=23,24,25,26,29;out=28;

;------------------------------------------------------------------------------
;
; unsigned long bn_div_words(unsigned long h, unsigned long l, unsigned long d)
;
; arg0 = h
; arg1 = l
; arg2 = d
;
; This is mainly just output from the HP C compiler.  
;
;------------------------------------------------------------------------------
bn_div_words
	.PROC
	.EXPORT	bn_div_words,ENTRY,PRIV_LEV=3,ARGW0=GR,ARGW1=GR,ARGW2=GR,ARGW3=GR,RTNVAL=GR,LONG_RETURN
	.IMPORT	BN_num_bits_word,CODE
	;--- not PIC	.IMPORT	__iob,DATA
	;--- not PIC	.IMPORT	fprintf,CODE
	.IMPORT	abort,CODE
	.IMPORT	$$div2U,MILLICODE
	.CALLINFO CALLER,FRAME=144,ENTRY_GR=%r9,SAVE_RP,ARGS_SAVED,ORDERING_AWARE
        .ENTRY
        STW     %r2,-20(%r30)   ;offset 0x8ec
        STW,MA  %r3,192(%r30)   ;offset 0x8f0
        STW     %r4,-188(%r30)  ;offset 0x8f4
        DEPD    %r5,31,32,%r6   ;offset 0x8f8
        STD     %r6,-184(%r30)  ;offset 0x8fc
        DEPD    %r7,31,32,%r8   ;offset 0x900
        STD     %r8,-176(%r30)  ;offset 0x904
        STW     %r9,-168(%r30)  ;offset 0x908
        LDD     -248(%r30),%r3  ;offset 0x90c
        COPY    %r26,%r4        ;offset 0x910
        COPY    %r24,%r5        ;offset 0x914
        DEPD    %r25,31,32,%r4  ;offset 0x918
        CMPB,*<>        %r3,%r0,$0006000C       ;offset 0x91c
        DEPD    %r23,31,32,%r5  ;offset 0x920
        MOVIB,TR        -1,%r29,$00060002       ;offset 0x924
        EXTRD,U %r29,31,32,%r28 ;offset 0x928
$0006002A
        LDO     -1(%r29),%r29   ;offset 0x92c
        SUB     %r23,%r7,%r23   ;offset 0x930
$00060024
        SUB     %r4,%r31,%r25   ;offset 0x934
        AND     %r25,%r19,%r26  ;offset 0x938
        CMPB,*<>,N      %r0,%r26,$00060046      ;offset 0x93c
        DEPD,Z  %r25,31,32,%r20 ;offset 0x940
        OR      %r20,%r24,%r21  ;offset 0x944
        CMPB,*<<,N      %r21,%r23,$0006002A     ;offset 0x948
        SUB     %r31,%r2,%r31   ;offset 0x94c
$00060046
$0006002E
        DEPD,Z  %r23,31,32,%r25 ;offset 0x950
        EXTRD,U %r23,31,32,%r26 ;offset 0x954
        AND     %r25,%r19,%r24  ;offset 0x958
        ADD,L   %r31,%r26,%r31  ;offset 0x95c
        CMPCLR,*>>=     %r5,%r24,%r0    ;offset 0x960
        LDO     1(%r31),%r31    ;offset 0x964
$00060032
        CMPB,*<<=,N     %r31,%r4,$00060036      ;offset 0x968
        LDO     -1(%r29),%r29   ;offset 0x96c
        ADD,L   %r4,%r3,%r4     ;offset 0x970
$00060036
        ADDIB,=,N       -1,%r8,$D0      ;offset 0x974
        SUB     %r5,%r24,%r28   ;offset 0x978
$0006003A
        SUB     %r4,%r31,%r24   ;offset 0x97c
        SHRPD   %r24,%r28,32,%r4        ;offset 0x980
        DEPD,Z  %r29,31,32,%r9  ;offset 0x984
        DEPD,Z  %r28,31,32,%r5  ;offset 0x988
$0006001C
        EXTRD,U %r4,31,32,%r31  ;offset 0x98c
        CMPB,*<>,N      %r31,%r2,$00060020      ;offset 0x990
        MOVB,TR %r6,%r29,$D1    ;offset 0x994
        STD     %r29,-152(%r30) ;offset 0x998
$0006000C
        EXTRD,U %r3,31,32,%r25  ;offset 0x99c
        COPY    %r3,%r26        ;offset 0x9a0
        EXTRD,U %r3,31,32,%r9   ;offset 0x9a4
        EXTRD,U %r4,31,32,%r8   ;offset 0x9a8
        .CALL   ARGW0=GR,ARGW1=GR,RTNVAL=GR     ;in=25,26;out=28;
        B,L     BN_num_bits_word,%r2    ;offset 0x9ac
        EXTRD,U %r5,31,32,%r7   ;offset 0x9b0
        LDI     64,%r20 ;offset 0x9b4
        DEPD    %r7,31,32,%r5   ;offset 0x9b8
        DEPD    %r8,31,32,%r4   ;offset 0x9bc
        DEPD    %r9,31,32,%r3   ;offset 0x9c0
        CMPB,=  %r28,%r20,$00060012     ;offset 0x9c4
        COPY    %r28,%r24       ;offset 0x9c8
        MTSARCM %r24    ;offset 0x9cc
        DEPDI,Z -1,%sar,1,%r19  ;offset 0x9d0
        CMPB,*>>,N      %r4,%r19,$D2    ;offset 0x9d4
$00060012
        SUBI    64,%r24,%r31    ;offset 0x9d8
        CMPCLR,*<<      %r4,%r3,%r0     ;offset 0x9dc
        SUB     %r4,%r3,%r4     ;offset 0x9e0
$00060016
        CMPB,=  %r31,%r0,$0006001A      ;offset 0x9e4
        COPY    %r0,%r9 ;offset 0x9e8
        MTSARCM %r31    ;offset 0x9ec
        DEPD,Z  %r3,%sar,64,%r3 ;offset 0x9f0
        SUBI    64,%r31,%r26    ;offset 0x9f4
        MTSAR   %r26    ;offset 0x9f8
        SHRPD   %r4,%r5,%sar,%r4        ;offset 0x9fc
        MTSARCM %r31    ;offset 0xa00
        DEPD,Z  %r5,%sar,64,%r5 ;offset 0xa04
$0006001A
        DEPDI,Z -1,31,32,%r19   ;offset 0xa08
        AND     %r3,%r19,%r29   ;offset 0xa0c
        EXTRD,U %r29,31,32,%r2  ;offset 0xa10
        DEPDI,Z -1,63,32,%r6    ;offset 0xa14
        MOVIB,TR        2,%r8,$0006001C ;offset 0xa18
        EXTRD,U %r3,63,32,%r7   ;offset 0xa1c
$D2
        ;--- not PIC	ADDIL   LR'__iob-$global$,%r27,%r1      ;offset 0xa20
        ;--- not PIC	LDIL    LR'C$7,%r21     ;offset 0xa24
        ;--- not PIC	LDO     RR'__iob-$global$+32(%r1),%r26  ;offset 0xa28
        ;--- not PIC	.CALL   ARGW0=GR,ARGW1=GR,ARGW2=GR,RTNVAL=GR    ;in=24,25,26;out=28;
        ;--- not PIC	B,L     fprintf,%r2     ;offset 0xa2c
        ;--- not PIC	LDO     RR'C$7(%r21),%r25       ;offset 0xa30
        .CALL           ;
        B,L     abort,%r2       ;offset 0xa34
        NOP             ;offset 0xa38
        B       $D3     ;offset 0xa3c
        LDW     -212(%r30),%r2  ;offset 0xa40
$00060020
        COPY    %r4,%r26        ;offset 0xa44
        EXTRD,U %r4,31,32,%r25  ;offset 0xa48
        COPY    %r2,%r24        ;offset 0xa4c
        .CALL   ;in=23,24,25,26;out=20,21,22,28,29; (MILLICALL)
        B,L     $$div2U,%r31    ;offset 0xa50
        EXTRD,U %r2,31,32,%r23  ;offset 0xa54
        DEPD    %r28,31,32,%r29 ;offset 0xa58
$00060022
        STD     %r29,-152(%r30) ;offset 0xa5c
$D1
        AND     %r5,%r19,%r24   ;offset 0xa60
        EXTRD,U %r24,31,32,%r24 ;offset 0xa64
        STW     %r2,-160(%r30)  ;offset 0xa68
        STW     %r7,-128(%r30)  ;offset 0xa6c
        FLDD    -152(%r30),%fr4 ;offset 0xa70
        FLDD    -152(%r30),%fr7 ;offset 0xa74
        FLDW    -160(%r30),%fr8L        ;offset 0xa78
        FLDW    -128(%r30),%fr5L        ;offset 0xa7c
        XMPYU   %fr8L,%fr7L,%fr10       ;offset 0xa80
        FSTD    %fr10,-136(%r30)        ;offset 0xa84
        XMPYU   %fr8L,%fr7R,%fr22       ;offset 0xa88
        FSTD    %fr22,-144(%r30)        ;offset 0xa8c
        XMPYU   %fr5L,%fr4L,%fr11       ;offset 0xa90
        XMPYU   %fr5L,%fr4R,%fr23       ;offset 0xa94
        FSTD    %fr11,-112(%r30)        ;offset 0xa98
        FSTD    %fr23,-120(%r30)        ;offset 0xa9c
        LDD     -136(%r30),%r28 ;offset 0xaa0
        DEPD,Z  %r28,31,32,%r31 ;offset 0xaa4
        LDD     -144(%r30),%r20 ;offset 0xaa8
        ADD,L   %r20,%r31,%r31  ;offset 0xaac
        LDD     -112(%r30),%r22 ;offset 0xab0
        DEPD,Z  %r22,31,32,%r22 ;offset 0xab4
        LDD     -120(%r30),%r21 ;offset 0xab8
        B       $00060024       ;offset 0xabc
        ADD,L   %r21,%r22,%r23  ;offset 0xac0
$D0
        OR      %r9,%r29,%r29   ;offset 0xac4
$00060040
        EXTRD,U %r29,31,32,%r28 ;offset 0xac8
$00060002
$L2
        LDW     -212(%r30),%r2  ;offset 0xacc
$D3
        LDW     -168(%r30),%r9  ;offset 0xad0
        LDD     -176(%r30),%r8  ;offset 0xad4
        EXTRD,U %r8,31,32,%r7   ;offset 0xad8
        LDD     -184(%r30),%r6  ;offset 0xadc
        EXTRD,U %r6,31,32,%r5   ;offset 0xae0
        LDW     -188(%r30),%r4  ;offset 0xae4
        BVE     (%r2)   ;offset 0xae8
        .EXIT
        LDW,MB  -192(%r30),%r3  ;offset 0xaec
	.PROCEND	;in=23,25;out=28,29;fpin=105,107;




;----------------------------------------------------------------------------
;
; Registers to hold 64-bit values to manipulate.  The "L" part
; of the register corresponds to the upper 32-bits, while the "R"
; part corresponds to the lower 32-bits
; 
; Note, that when using b6 and b7, the code must save these before
; using them because they are callee save registers 
; 
;
; Floating point registers to use to save values that
; are manipulated.  These don't collide with ftemp1-6 and
; are all caller save registers
;
a0        .reg %fr22
a0L       .reg %fr22L
a0R       .reg %fr22R

a1        .reg %fr23
a1L       .reg %fr23L
a1R       .reg %fr23R

a2        .reg %fr24
a2L       .reg %fr24L
a2R       .reg %fr24R

a3        .reg %fr25
a3L       .reg %fr25L
a3R       .reg %fr25R

a4        .reg %fr26
a4L       .reg %fr26L
a4R       .reg %fr26R

a5        .reg %fr27
a5L       .reg %fr27L
a5R       .reg %fr27R

a6        .reg %fr28
a6L       .reg %fr28L
a6R       .reg %fr28R

a7        .reg %fr29
a7L       .reg %fr29L
a7R       .reg %fr29R

b0        .reg %fr30
b0L       .reg %fr30L
b0R       .reg %fr30R

b1        .reg %fr31
b1L       .reg %fr31L
b1R       .reg %fr31R

;
; Temporary floating point variables, these are all caller save
; registers
;
ftemp1    .reg %fr4
ftemp2    .reg %fr5
ftemp3    .reg %fr6
ftemp4    .reg %fr7

;
; The B set of registers when used.
;

b2        .reg %fr8
b2L       .reg %fr8L
b2R       .reg %fr8R

b3        .reg %fr9
b3L       .reg %fr9L
b3R       .reg %fr9R

b4        .reg %fr10
b4L       .reg %fr10L
b4R       .reg %fr10R

b5        .reg %fr11
b5L       .reg %fr11L
b5R       .reg %fr11R

b6        .reg %fr12
b6L       .reg %fr12L
b6R       .reg %fr12R

b7        .reg %fr13
b7L       .reg %fr13L
b7R       .reg %fr13R

c1           .reg %r21   ; only reg
temp1        .reg %r20   ; only reg
temp2        .reg %r19   ; only reg
temp3        .reg %r31   ; only reg

m1           .reg %r28   
c2           .reg %r23   
high_one     .reg %r1
ht           .reg %r6
lt           .reg %r5
m            .reg %r4
c3           .reg %r3

SQR_ADD_C  .macro  A0L,A0R,C1,C2,C3
    XMPYU   A0L,A0R,ftemp1       ; m
    FSTD    ftemp1,-24(%sp)      ; store m

    XMPYU   A0R,A0R,ftemp2       ; lt
    FSTD    ftemp2,-16(%sp)      ; store lt

    XMPYU   A0L,A0L,ftemp3       ; ht
    FSTD    ftemp3,-8(%sp)       ; store ht

    LDD     -24(%sp),m           ; load m
    AND     m,high_mask,temp2    ; m & Mask
    DEPD,Z  m,30,31,temp3        ; m << 32+1
    LDD     -16(%sp),lt          ; lt

    LDD     -8(%sp),ht           ; ht
    EXTRD,U temp2,32,33,temp1    ; temp1 = m&Mask >> 32-1
    ADD     temp3,lt,lt          ; lt = lt+m
    ADD,L   ht,temp1,ht          ; ht += temp1
    ADD,DC  ht,%r0,ht            ; ht++

    ADD     C1,lt,C1             ; c1=c1+lt
    ADD,DC  ht,%r0,ht            ; ht++

    ADD     C2,ht,C2             ; c2=c2+ht
    ADD,DC  C3,%r0,C3            ; c3++
.endm

SQR_ADD_C2 .macro  A0L,A0R,A1L,A1R,C1,C2,C3
    XMPYU   A0L,A1R,ftemp1          ; m1 = bl*ht
    FSTD    ftemp1,-16(%sp)         ;
    XMPYU   A0R,A1L,ftemp2          ; m = bh*lt
    FSTD    ftemp2,-8(%sp)          ;
    XMPYU   A0R,A1R,ftemp3          ; lt = bl*lt
    FSTD    ftemp3,-32(%sp)
    XMPYU   A0L,A1L,ftemp4          ; ht = bh*ht
    FSTD    ftemp4,-24(%sp)         ;

    LDD     -8(%sp),m               ; r21 = m
    LDD     -16(%sp),m1             ; r19 = m1
    ADD,L   m,m1,m                  ; m+m1

    DEPD,Z  m,31,32,temp3           ; (m+m1<<32)
    LDD     -24(%sp),ht             ; r24 = ht

    CMPCLR,*>>= m,m1,%r0            ; if (m < m1)
    ADD,L   ht,high_one,ht          ; ht+=high_one

    EXTRD,U m,31,32,temp1           ; m >> 32
    LDD     -32(%sp),lt             ; lt
    ADD,L   ht,temp1,ht             ; ht+= m>>32
    ADD     lt,temp3,lt             ; lt = lt+m1
    ADD,DC  ht,%r0,ht               ; ht++

    ADD     ht,ht,ht                ; ht=ht+ht;
    ADD,DC  C3,%r0,C3               ; add in carry (c3++)

    ADD     lt,lt,lt                ; lt=lt+lt;
    ADD,DC  ht,%r0,ht               ; add in carry (ht++)

    ADD     C1,lt,C1                ; c1=c1+lt
    ADD,DC,*NUV ht,%r0,ht           ; add in carry (ht++)
    LDO     1(C3),C3              ; bump c3 if overflow,nullify otherwise

    ADD     C2,ht,C2                ; c2 = c2 + ht
    ADD,DC  C3,%r0,C3             ; add in carry (c3++)
.endm

;
;void bn_sqr_comba8(BN_ULONG *r, BN_ULONG *a)
; arg0 = r_ptr
; arg1 = a_ptr
;

bn_sqr_comba8
	.PROC
	.CALLINFO FRAME=128,ENTRY_GR=%r3,ARGS_SAVED,ORDERING_AWARE
	.EXPORT	bn_sqr_comba8,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .ENTRY
	.align 64

    STD     %r3,0(%sp)          ; save r3
    STD     %r4,8(%sp)          ; save r4
    STD     %r5,16(%sp)         ; save r5
    STD     %r6,24(%sp)         ; save r6

	;
	; Zero out carries
	;
	COPY     %r0,c1
	COPY     %r0,c2
	COPY     %r0,c3

	LDO      128(%sp),%sp       ; bump stack
    DEPDI,Z -1,32,33,high_mask   ; Create Mask 0xffffffff80000000L
    DEPDI,Z  1,31,1,high_one     ; Create Value  1 << 32

	;
	; Load up all of the values we are going to use
	;
    FLDD     0(a_ptr),a0       
    FLDD     8(a_ptr),a1       
    FLDD    16(a_ptr),a2       
    FLDD    24(a_ptr),a3       
    FLDD    32(a_ptr),a4       
    FLDD    40(a_ptr),a5       
    FLDD    48(a_ptr),a6       
    FLDD    56(a_ptr),a7       

	SQR_ADD_C a0L,a0R,c1,c2,c3
	STD     c1,0(r_ptr)          ; r[0] = c1;
	COPY    %r0,c1

	SQR_ADD_C2 a1L,a1R,a0L,a0R,c2,c3,c1
	STD     c2,8(r_ptr)          ; r[1] = c2;
	COPY    %r0,c2

	SQR_ADD_C a1L,a1R,c3,c1,c2
	SQR_ADD_C2 a2L,a2R,a0L,a0R,c3,c1,c2
	STD     c3,16(r_ptr)            ; r[2] = c3;
	COPY    %r0,c3

	SQR_ADD_C2 a3L,a3R,a0L,a0R,c1,c2,c3
	SQR_ADD_C2 a2L,a2R,a1L,a1R,c1,c2,c3
	STD     c1,24(r_ptr)           ; r[3] = c1;
	COPY    %r0,c1

	SQR_ADD_C a2L,a2R,c2,c3,c1
	SQR_ADD_C2 a3L,a3R,a1L,a1R,c2,c3,c1
	SQR_ADD_C2 a4L,a4R,a0L,a0R,c2,c3,c1
	STD     c2,32(r_ptr)          ; r[4] = c2;
	COPY    %r0,c2

	SQR_ADD_C2 a5L,a5R,a0L,a0R,c3,c1,c2
	SQR_ADD_C2 a4L,a4R,a1L,a1R,c3,c1,c2
	SQR_ADD_C2 a3L,a3R,a2L,a2R,c3,c1,c2
	STD     c3,40(r_ptr)          ; r[5] = c3;
	COPY    %r0,c3

	SQR_ADD_C a3L,a3R,c1,c2,c3
	SQR_ADD_C2 a4L,a4R,a2L,a2R,c1,c2,c3
	SQR_ADD_C2 a5L,a5R,a1L,a1R,c1,c2,c3
	SQR_ADD_C2 a6L,a6R,a0L,a0R,c1,c2,c3
	STD     c1,48(r_ptr)          ; r[6] = c1;
	COPY    %r0,c1

	SQR_ADD_C2 a7L,a7R,a0L,a0R,c2,c3,c1
	SQR_ADD_C2 a6L,a6R,a1L,a1R,c2,c3,c1
	SQR_ADD_C2 a5L,a5R,a2L,a2R,c2,c3,c1
	SQR_ADD_C2 a4L,a4R,a3L,a3R,c2,c3,c1
	STD     c2,56(r_ptr)          ; r[7] = c2;
	COPY    %r0,c2

	SQR_ADD_C a4L,a4R,c3,c1,c2
	SQR_ADD_C2 a5L,a5R,a3L,a3R,c3,c1,c2
	SQR_ADD_C2 a6L,a6R,a2L,a2R,c3,c1,c2
	SQR_ADD_C2 a7L,a7R,a1L,a1R,c3,c1,c2
	STD     c3,64(r_ptr)          ; r[8] = c3;
	COPY    %r0,c3

	SQR_ADD_C2 a7L,a7R,a2L,a2R,c1,c2,c3
	SQR_ADD_C2 a6L,a6R,a3L,a3R,c1,c2,c3
	SQR_ADD_C2 a5L,a5R,a4L,a4R,c1,c2,c3
	STD     c1,72(r_ptr)          ; r[9] = c1;
	COPY    %r0,c1

	SQR_ADD_C a5L,a5R,c2,c3,c1
	SQR_ADD_C2 a6L,a6R,a4L,a4R,c2,c3,c1
	SQR_ADD_C2 a7L,a7R,a3L,a3R,c2,c3,c1
	STD     c2,80(r_ptr)          ; r[10] = c2;
	COPY    %r0,c2

	SQR_ADD_C2 a7L,a7R,a4L,a4R,c3,c1,c2
	SQR_ADD_C2 a6L,a6R,a5L,a5R,c3,c1,c2
	STD     c3,88(r_ptr)          ; r[11] = c3;
	COPY    %r0,c3
	
	SQR_ADD_C a6L,a6R,c1,c2,c3
	SQR_ADD_C2 a7L,a7R,a5L,a5R,c1,c2,c3
	STD     c1,96(r_ptr)          ; r[12] = c1;
	COPY    %r0,c1

	SQR_ADD_C2 a7L,a7R,a6L,a6R,c2,c3,c1
	STD     c2,104(r_ptr)         ; r[13] = c2;
	COPY    %r0,c2

	SQR_ADD_C a7L,a7R,c3,c1,c2
	STD     c3, 112(r_ptr)       ; r[14] = c3
	STD     c1, 120(r_ptr)       ; r[15] = c1

    .EXIT
    LDD     -104(%sp),%r6        ; restore r6
    LDD     -112(%sp),%r5        ; restore r5
    LDD     -120(%sp),%r4        ; restore r4
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3

	.PROCEND	

;-----------------------------------------------------------------------------
;
;void bn_sqr_comba4(BN_ULONG *r, BN_ULONG *a)
; arg0 = r_ptr
; arg1 = a_ptr
;

bn_sqr_comba4
	.proc
	.callinfo FRAME=128,ENTRY_GR=%r3,ARGS_SAVED,ORDERING_AWARE
	.EXPORT	bn_sqr_comba4,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .entry
	.align 64
    STD     %r3,0(%sp)          ; save r3
    STD     %r4,8(%sp)          ; save r4
    STD     %r5,16(%sp)         ; save r5
    STD     %r6,24(%sp)         ; save r6

	;
	; Zero out carries
	;
	COPY     %r0,c1
	COPY     %r0,c2
	COPY     %r0,c3

	LDO      128(%sp),%sp       ; bump stack
    DEPDI,Z -1,32,33,high_mask   ; Create Mask 0xffffffff80000000L
    DEPDI,Z  1,31,1,high_one     ; Create Value  1 << 32

	;
	; Load up all of the values we are going to use
	;
    FLDD     0(a_ptr),a0       
    FLDD     8(a_ptr),a1       
    FLDD    16(a_ptr),a2       
    FLDD    24(a_ptr),a3       
    FLDD    32(a_ptr),a4       
    FLDD    40(a_ptr),a5       
    FLDD    48(a_ptr),a6       
    FLDD    56(a_ptr),a7       

	SQR_ADD_C a0L,a0R,c1,c2,c3

	STD     c1,0(r_ptr)          ; r[0] = c1;
	COPY    %r0,c1

	SQR_ADD_C2 a1L,a1R,a0L,a0R,c2,c3,c1

	STD     c2,8(r_ptr)          ; r[1] = c2;
	COPY    %r0,c2

	SQR_ADD_C a1L,a1R,c3,c1,c2
	SQR_ADD_C2 a2L,a2R,a0L,a0R,c3,c1,c2

	STD     c3,16(r_ptr)            ; r[2] = c3;
	COPY    %r0,c3

	SQR_ADD_C2 a3L,a3R,a0L,a0R,c1,c2,c3
	SQR_ADD_C2 a2L,a2R,a1L,a1R,c1,c2,c3

	STD     c1,24(r_ptr)           ; r[3] = c1;
	COPY    %r0,c1

	SQR_ADD_C a2L,a2R,c2,c3,c1
	SQR_ADD_C2 a3L,a3R,a1L,a1R,c2,c3,c1

	STD     c2,32(r_ptr)           ; r[4] = c2;
	COPY    %r0,c2

	SQR_ADD_C2 a3L,a3R,a2L,a2R,c3,c1,c2
	STD     c3,40(r_ptr)           ; r[5] = c3;
	COPY    %r0,c3

	SQR_ADD_C a3L,a3R,c1,c2,c3
	STD     c1,48(r_ptr)           ; r[6] = c1;
	STD     c2,56(r_ptr)           ; r[7] = c2;

    .EXIT
    LDD     -104(%sp),%r6        ; restore r6
    LDD     -112(%sp),%r5        ; restore r5
    LDD     -120(%sp),%r4        ; restore r4
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3

	.PROCEND	


;---------------------------------------------------------------------------

MUL_ADD_C  .macro  A0L,A0R,B0L,B0R,C1,C2,C3
    XMPYU   A0L,B0R,ftemp1        ; m1 = bl*ht
    FSTD    ftemp1,-16(%sp)       ;
    XMPYU   A0R,B0L,ftemp2        ; m = bh*lt
    FSTD    ftemp2,-8(%sp)        ;
    XMPYU   A0R,B0R,ftemp3        ; lt = bl*lt
    FSTD    ftemp3,-32(%sp)
    XMPYU   A0L,B0L,ftemp4        ; ht = bh*ht
    FSTD    ftemp4,-24(%sp)       ;

    LDD     -8(%sp),m             ; r21 = m
    LDD     -16(%sp),m1           ; r19 = m1
    ADD,L   m,m1,m                ; m+m1

    DEPD,Z  m,31,32,temp3         ; (m+m1<<32)
    LDD     -24(%sp),ht           ; r24 = ht

    CMPCLR,*>>= m,m1,%r0          ; if (m < m1)
    ADD,L   ht,high_one,ht        ; ht+=high_one

    EXTRD,U m,31,32,temp1         ; m >> 32
    LDD     -32(%sp),lt           ; lt
    ADD,L   ht,temp1,ht           ; ht+= m>>32
    ADD     lt,temp3,lt           ; lt = lt+m1
    ADD,DC  ht,%r0,ht             ; ht++

    ADD     C1,lt,C1              ; c1=c1+lt
    ADD,DC  ht,%r0,ht             ; bump c3 if overflow,nullify otherwise

    ADD     C2,ht,C2              ; c2 = c2 + ht
    ADD,DC  C3,%r0,C3             ; add in carry (c3++)
.endm


;
;void bn_mul_comba8(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
; arg0 = r_ptr
; arg1 = a_ptr
; arg2 = b_ptr
;

bn_mul_comba8
	.proc
	.callinfo FRAME=128,ENTRY_GR=%r3,ARGS_SAVED,ORDERING_AWARE
	.EXPORT	bn_mul_comba8,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .entry
	.align 64

    STD     %r3,0(%sp)          ; save r3
    STD     %r4,8(%sp)          ; save r4
    STD     %r5,16(%sp)         ; save r5
    STD     %r6,24(%sp)         ; save r6
    FSTD    %fr12,32(%sp)       ; save r6
    FSTD    %fr13,40(%sp)       ; save r7

	;
	; Zero out carries
	;
	COPY     %r0,c1
	COPY     %r0,c2
	COPY     %r0,c3

	LDO      128(%sp),%sp       ; bump stack
    DEPDI,Z  1,31,1,high_one     ; Create Value  1 << 32

	;
	; Load up all of the values we are going to use
	;
    FLDD      0(a_ptr),a0       
    FLDD      8(a_ptr),a1       
    FLDD     16(a_ptr),a2       
    FLDD     24(a_ptr),a3       
    FLDD     32(a_ptr),a4       
    FLDD     40(a_ptr),a5       
    FLDD     48(a_ptr),a6       
    FLDD     56(a_ptr),a7       

    FLDD      0(b_ptr),b0       
    FLDD      8(b_ptr),b1       
    FLDD     16(b_ptr),b2       
    FLDD     24(b_ptr),b3       
    FLDD     32(b_ptr),b4       
    FLDD     40(b_ptr),b5       
    FLDD     48(b_ptr),b6       
    FLDD     56(b_ptr),b7       

	MUL_ADD_C a0L,a0R,b0L,b0R,c1,c2,c3
	STD       c1,0(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a0L,a0R,b1L,b1R,c2,c3,c1
	MUL_ADD_C a1L,a1R,b0L,b0R,c2,c3,c1
	STD       c2,8(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a2L,a2R,b0L,b0R,c3,c1,c2
	MUL_ADD_C a1L,a1R,b1L,b1R,c3,c1,c2
	MUL_ADD_C a0L,a0R,b2L,b2R,c3,c1,c2
	STD       c3,16(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a0L,a0R,b3L,b3R,c1,c2,c3
	MUL_ADD_C a1L,a1R,b2L,b2R,c1,c2,c3
	MUL_ADD_C a2L,a2R,b1L,b1R,c1,c2,c3
	MUL_ADD_C a3L,a3R,b0L,b0R,c1,c2,c3
	STD       c1,24(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a4L,a4R,b0L,b0R,c2,c3,c1
	MUL_ADD_C a3L,a3R,b1L,b1R,c2,c3,c1
	MUL_ADD_C a2L,a2R,b2L,b2R,c2,c3,c1
	MUL_ADD_C a1L,a1R,b3L,b3R,c2,c3,c1
	MUL_ADD_C a0L,a0R,b4L,b4R,c2,c3,c1
	STD       c2,32(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a0L,a0R,b5L,b5R,c3,c1,c2
	MUL_ADD_C a1L,a1R,b4L,b4R,c3,c1,c2
	MUL_ADD_C a2L,a2R,b3L,b3R,c3,c1,c2
	MUL_ADD_C a3L,a3R,b2L,b2R,c3,c1,c2
	MUL_ADD_C a4L,a4R,b1L,b1R,c3,c1,c2
	MUL_ADD_C a5L,a5R,b0L,b0R,c3,c1,c2
	STD       c3,40(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a6L,a6R,b0L,b0R,c1,c2,c3
	MUL_ADD_C a5L,a5R,b1L,b1R,c1,c2,c3
	MUL_ADD_C a4L,a4R,b2L,b2R,c1,c2,c3
	MUL_ADD_C a3L,a3R,b3L,b3R,c1,c2,c3
	MUL_ADD_C a2L,a2R,b4L,b4R,c1,c2,c3
	MUL_ADD_C a1L,a1R,b5L,b5R,c1,c2,c3
	MUL_ADD_C a0L,a0R,b6L,b6R,c1,c2,c3
	STD       c1,48(r_ptr)
	COPY      %r0,c1
	
	MUL_ADD_C a0L,a0R,b7L,b7R,c2,c3,c1
	MUL_ADD_C a1L,a1R,b6L,b6R,c2,c3,c1
	MUL_ADD_C a2L,a2R,b5L,b5R,c2,c3,c1
	MUL_ADD_C a3L,a3R,b4L,b4R,c2,c3,c1
	MUL_ADD_C a4L,a4R,b3L,b3R,c2,c3,c1
	MUL_ADD_C a5L,a5R,b2L,b2R,c2,c3,c1
	MUL_ADD_C a6L,a6R,b1L,b1R,c2,c3,c1
	MUL_ADD_C a7L,a7R,b0L,b0R,c2,c3,c1
	STD       c2,56(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a7L,a7R,b1L,b1R,c3,c1,c2
	MUL_ADD_C a6L,a6R,b2L,b2R,c3,c1,c2
	MUL_ADD_C a5L,a5R,b3L,b3R,c3,c1,c2
	MUL_ADD_C a4L,a4R,b4L,b4R,c3,c1,c2
	MUL_ADD_C a3L,a3R,b5L,b5R,c3,c1,c2
	MUL_ADD_C a2L,a2R,b6L,b6R,c3,c1,c2
	MUL_ADD_C a1L,a1R,b7L,b7R,c3,c1,c2
	STD       c3,64(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a2L,a2R,b7L,b7R,c1,c2,c3
	MUL_ADD_C a3L,a3R,b6L,b6R,c1,c2,c3
	MUL_ADD_C a4L,a4R,b5L,b5R,c1,c2,c3
	MUL_ADD_C a5L,a5R,b4L,b4R,c1,c2,c3
	MUL_ADD_C a6L,a6R,b3L,b3R,c1,c2,c3
	MUL_ADD_C a7L,a7R,b2L,b2R,c1,c2,c3
	STD       c1,72(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a7L,a7R,b3L,b3R,c2,c3,c1
	MUL_ADD_C a6L,a6R,b4L,b4R,c2,c3,c1
	MUL_ADD_C a5L,a5R,b5L,b5R,c2,c3,c1
	MUL_ADD_C a4L,a4R,b6L,b6R,c2,c3,c1
	MUL_ADD_C a3L,a3R,b7L,b7R,c2,c3,c1
	STD       c2,80(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a4L,a4R,b7L,b7R,c3,c1,c2
	MUL_ADD_C a5L,a5R,b6L,b6R,c3,c1,c2
	MUL_ADD_C a6L,a6R,b5L,b5R,c3,c1,c2
	MUL_ADD_C a7L,a7R,b4L,b4R,c3,c1,c2
	STD       c3,88(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a7L,a7R,b5L,b5R,c1,c2,c3
	MUL_ADD_C a6L,a6R,b6L,b6R,c1,c2,c3
	MUL_ADD_C a5L,a5R,b7L,b7R,c1,c2,c3
	STD       c1,96(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a6L,a6R,b7L,b7R,c2,c3,c1
	MUL_ADD_C a7L,a7R,b6L,b6R,c2,c3,c1
	STD       c2,104(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a7L,a7R,b7L,b7R,c3,c1,c2
	STD       c3,112(r_ptr)
	STD       c1,120(r_ptr)

    .EXIT
    FLDD    -88(%sp),%fr13 
    FLDD    -96(%sp),%fr12 
    LDD     -104(%sp),%r6        ; restore r6
    LDD     -112(%sp),%r5        ; restore r5
    LDD     -120(%sp),%r4        ; restore r4
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3

	.PROCEND	

;-----------------------------------------------------------------------------
;
;void bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
; arg0 = r_ptr
; arg1 = a_ptr
; arg2 = b_ptr
;

bn_mul_comba4
	.proc
	.callinfo FRAME=128,ENTRY_GR=%r3,ARGS_SAVED,ORDERING_AWARE
	.EXPORT	bn_mul_comba4,ENTRY,PRIV_LEV=3,NO_RELOCATION,LONG_RETURN
    .entry
	.align 64

    STD     %r3,0(%sp)          ; save r3
    STD     %r4,8(%sp)          ; save r4
    STD     %r5,16(%sp)         ; save r5
    STD     %r6,24(%sp)         ; save r6
    FSTD    %fr12,32(%sp)       ; save r6
    FSTD    %fr13,40(%sp)       ; save r7

	;
	; Zero out carries
	;
	COPY     %r0,c1
	COPY     %r0,c2
	COPY     %r0,c3

	LDO      128(%sp),%sp       ; bump stack
    DEPDI,Z  1,31,1,high_one     ; Create Value  1 << 32

	;
	; Load up all of the values we are going to use
	;
    FLDD      0(a_ptr),a0       
    FLDD      8(a_ptr),a1       
    FLDD     16(a_ptr),a2       
    FLDD     24(a_ptr),a3       

    FLDD      0(b_ptr),b0       
    FLDD      8(b_ptr),b1       
    FLDD     16(b_ptr),b2       
    FLDD     24(b_ptr),b3       

	MUL_ADD_C a0L,a0R,b0L,b0R,c1,c2,c3
	STD       c1,0(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a0L,a0R,b1L,b1R,c2,c3,c1
	MUL_ADD_C a1L,a1R,b0L,b0R,c2,c3,c1
	STD       c2,8(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a2L,a2R,b0L,b0R,c3,c1,c2
	MUL_ADD_C a1L,a1R,b1L,b1R,c3,c1,c2
	MUL_ADD_C a0L,a0R,b2L,b2R,c3,c1,c2
	STD       c3,16(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a0L,a0R,b3L,b3R,c1,c2,c3
	MUL_ADD_C a1L,a1R,b2L,b2R,c1,c2,c3
	MUL_ADD_C a2L,a2R,b1L,b1R,c1,c2,c3
	MUL_ADD_C a3L,a3R,b0L,b0R,c1,c2,c3
	STD       c1,24(r_ptr)
	COPY      %r0,c1

	MUL_ADD_C a3L,a3R,b1L,b1R,c2,c3,c1
	MUL_ADD_C a2L,a2R,b2L,b2R,c2,c3,c1
	MUL_ADD_C a1L,a1R,b3L,b3R,c2,c3,c1
	STD       c2,32(r_ptr)
	COPY      %r0,c2

	MUL_ADD_C a2L,a2R,b3L,b3R,c3,c1,c2
	MUL_ADD_C a3L,a3R,b2L,b2R,c3,c1,c2
	STD       c3,40(r_ptr)
	COPY      %r0,c3

	MUL_ADD_C a3L,a3R,b3L,b3R,c1,c2,c3
	STD       c1,48(r_ptr)
	STD       c2,56(r_ptr)

    .EXIT
    FLDD    -88(%sp),%fr13 
    FLDD    -96(%sp),%fr12 
    LDD     -104(%sp),%r6        ; restore r6
    LDD     -112(%sp),%r5        ; restore r5
    LDD     -120(%sp),%r4        ; restore r4
    BVE     (%rp)
    LDD,MB  -128(%sp),%r3

	.PROCEND	


;--- not PIC	.SPACE	$TEXT$
;--- not PIC	.SUBSPA	$CODE$
;--- not PIC	.SPACE	$PRIVATE$,SORT=16
;--- not PIC	.IMPORT	$global$,DATA
;--- not PIC	.SPACE	$TEXT$
;--- not PIC	.SUBSPA	$CODE$
;--- not PIC	.SUBSPA	$LIT$,ACCESS=0x2c
;--- not PIC	C$7
;--- not PIC	.ALIGN	8
;--- not PIC	.STRINGZ	"Division would overflow (%d)\n"
	.END
