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/
/ The contents of this file are subject to the Mozilla Public
/ License Version 1.1 (the "License"); you may not use this file
/ except in compliance with the License. You may obtain a copy of
/ the License at http://www.mozilla.org/MPL/
/
/ Software distributed under the License is distributed on an "AS
/ IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
/ implied. See the License for the specific language governing
/ rights and limitations under the License.
/
/ The Original Code is the Netscape security libraries.
/
/ The Initial Developer of the Original Code is Netscape
/ Communications Corporation. Portions created by Netscape are
/ Copyright (C) 2001 Netscape Communications Corporation. All
/ Rights Reserved.
/
/ Contributor(s):
/
/ Alternatively, the contents of this file may be used under the
/ terms of the GNU General Public License Version 2 or later (the
/ "GPL"), in which case the provisions of the GPL are applicable
/ instead of those above. If you wish to allow use of your
/ version of this file only under the terms of the GPL and not to
/ allow others to use your version of this file under the MPL,
/ indicate your decision by deleting the provisions above and
/ replace them with the notice and other provisions required by
/ the GPL. If you do not delete the provisions above, a recipient
/ may use your version of this file under either the MPL or the
/ GPL.
/ $Id: mpi_i86pc.s,v 1.1 2001/04/27 20:47:39 nelsonb%netscape.com Exp $
/
.text
/ ebp - 36: caller's esi
/ ebp - 32: caller's edi
/ ebp - 28:
/ ebp - 24:
/ ebp - 20:
/ ebp - 16:
/ ebp - 12:
/ ebp - 8:
/ ebp - 4:
/ ebp + 0: caller's ebp
/ ebp + 4: return address
/ ebp + 8: a argument
/ ebp + 12: a_len argument
/ ebp + 16: b argument
/ ebp + 20: c argument
/ registers:
/ eax:
/ ebx: carry
/ ecx: a_len
/ edx:
/ esi: a ptr
/ edi: c ptr
.globl s_mpv_mul_d
.type s_mpv_mul_d,@function
s_mpv_mul_d:
push %ebp
mov %esp,%ebp
sub $28,%esp
push %edi
push %esi
push %ebx
movl $0,%ebx / carry = 0
mov 12(%ebp),%ecx / ecx = a_len
mov 20(%ebp),%edi
cmp $0,%ecx
je L2 / jmp if a_len == 0
mov 8(%ebp),%esi / esi = a
cld
L1:
lodsl / eax = [ds:esi]; esi += 4
mov 16(%ebp),%edx / edx = b
mull %edx / edx:eax = Phi:Plo = a_i * b
add %ebx,%eax / add carry (%ebx) to edx:eax
adc $0,%edx
mov %edx,%ebx / high half of product becomes next carry
stosl / [es:edi] = ax; edi += 4;
dec %ecx / --a_len
jnz L1 / jmp if a_len != 0
L2:
mov %ebx,0(%edi) / *c = carry
pop %ebx
pop %esi
pop %edi
leave
ret
nop
/ ebp - 36: caller's esi
/ ebp - 32: caller's edi
/ ebp - 28:
/ ebp - 24:
/ ebp - 20:
/ ebp - 16:
/ ebp - 12:
/ ebp - 8:
/ ebp - 4:
/ ebp + 0: caller's ebp
/ ebp + 4: return address
/ ebp + 8: a argument
/ ebp + 12: a_len argument
/ ebp + 16: b argument
/ ebp + 20: c argument
/ registers:
/ eax:
/ ebx: carry
/ ecx: a_len
/ edx:
/ esi: a ptr
/ edi: c ptr
.globl s_mpv_mul_d_add
.type s_mpv_mul_d_add,@function
s_mpv_mul_d_add:
push %ebp
mov %esp,%ebp
sub $28,%esp
push %edi
push %esi
push %ebx
movl $0,%ebx / carry = 0
mov 12(%ebp),%ecx / ecx = a_len
mov 20(%ebp),%edi
cmp $0,%ecx
je L4 / jmp if a_len == 0
mov 8(%ebp),%esi / esi = a
cld
L3:
lodsl / eax = [ds:esi]; esi += 4
mov 16(%ebp),%edx / edx = b
mull %edx / edx:eax = Phi:Plo = a_i * b
add %ebx,%eax / add carry (%ebx) to edx:eax
adc $0,%edx
mov 0(%edi),%ebx / add in current word from *c
add %ebx,%eax
adc $0,%edx
mov %edx,%ebx / high half of product becomes next carry
stosl / [es:edi] = ax; edi += 4;
dec %ecx / --a_len
jnz L3 / jmp if a_len != 0
L4:
mov %ebx,0(%edi) / *c = carry
pop %ebx
pop %esi
pop %edi
leave
ret
nop
/ ebp - 36: caller's esi
/ ebp - 32: caller's edi
/ ebp - 28:
/ ebp - 24:
/ ebp - 20:
/ ebp - 16:
/ ebp - 12:
/ ebp - 8:
/ ebp - 4:
/ ebp + 0: caller's ebp
/ ebp + 4: return address
/ ebp + 8: a argument
/ ebp + 12: a_len argument
/ ebp + 16: b argument
/ ebp + 20: c argument
/ registers:
/ eax:
/ ebx: carry
/ ecx: a_len
/ edx:
/ esi: a ptr
/ edi: c ptr
.globl s_mpv_mul_d_add_prop
.type s_mpv_mul_d_add_prop,@function
s_mpv_mul_d_add_prop:
push %ebp
mov %esp,%ebp
sub $28,%esp
push %edi
push %esi
push %ebx
movl $0,%ebx / carry = 0
mov 12(%ebp),%ecx / ecx = a_len
mov 20(%ebp),%edi
cmp $0,%ecx
je L6 / jmp if a_len == 0
cld
mov 8(%ebp),%esi / esi = a
L5:
lodsl / eax = [ds:esi]; esi += 4
mov 16(%ebp),%edx / edx = b
mull %edx / edx:eax = Phi:Plo = a_i * b
add %ebx,%eax / add carry (%ebx) to edx:eax
adc $0,%edx
mov 0(%edi),%ebx / add in current word from *c
add %ebx,%eax
adc $0,%edx
mov %edx,%ebx / high half of product becomes next carry
stosl / [es:edi] = ax; edi += 4;
dec %ecx / --a_len
jnz L5 / jmp if a_len != 0
L6:
cmp $0,%ebx / is carry zero?
jz L8
mov 0(%edi),%eax / add in current word from *c
add %ebx,%eax
stosl / [es:edi] = ax; edi += 4;
jnc L8
L7:
mov 0(%edi),%eax / add in current word from *c
adc $0,%eax
stosl / [es:edi] = ax; edi += 4;
jc L7
L8:
pop %ebx
pop %esi
pop %edi
leave
ret
nop
/ ebp - 20: caller's esi
/ ebp - 16: caller's edi
/ ebp - 12:
/ ebp - 8: carry
/ ebp - 4: a_len local
/ ebp + 0: caller's ebp
/ ebp + 4: return address
/ ebp + 8: pa argument
/ ebp + 12: a_len argument
/ ebp + 16: ps argument
/ ebp + 20:
/ registers:
/ eax:
/ ebx: carry
/ ecx: a_len
/ edx:
/ esi: a ptr
/ edi: c ptr
.globl s_mpv_sqr_add_prop
.type s_mpv_sqr_add_prop,@function
s_mpv_sqr_add_prop:
push %ebp
mov %esp,%ebp
sub $12,%esp
push %edi
push %esi
push %ebx
movl $0,%ebx / carry = 0
mov 12(%ebp),%ecx / a_len
mov 16(%ebp),%edi / edi = ps
cmp $0,%ecx
je L11 / jump if a_len == 0
cld
mov 8(%ebp),%esi / esi = pa
L10:
lodsl / %eax = [ds:si]; si += 4;
mull %eax
add %ebx,%eax / add "carry"
adc $0,%edx
mov 0(%edi),%ebx
add %ebx,%eax / add low word from result
mov 4(%edi),%ebx
stosl / [es:di] = %eax; di += 4;
adc %ebx,%edx / add high word from result
movl $0,%ebx
mov %edx,%eax
adc $0,%ebx
stosl / [es:di] = %eax; di += 4;
dec %ecx / --a_len
jnz L10 / jmp if a_len != 0
L11:
cmp $0,%ebx / is carry zero?
jz L14
mov 0(%edi),%eax / add in current word from *c
add %ebx,%eax
stosl / [es:edi] = ax; edi += 4;
jnc L14
L12:
mov 0(%edi),%eax / add in current word from *c
adc $0,%eax
stosl / [es:edi] = ax; edi += 4;
jc L12
L14:
pop %ebx
pop %esi
pop %edi
leave
ret
nop
/
/ Divide 64-bit (Nhi,Nlo) by 32-bit divisor, which must be normalized
/ so its high bit is 1. This code is from NSPR.
/
/ mp_err s_mpv_div_2dx1d(mp_digit Nhi, mp_digit Nlo, mp_digit divisor,
/ mp_digit *qp, mp_digit *rp)
/ esp + 0: Caller's ebx
/ esp + 4: return address
/ esp + 8: Nhi argument
/ esp + 12: Nlo argument
/ esp + 16: divisor argument
/ esp + 20: qp argument
/ esp + 24: rp argument
/ registers:
/ eax:
/ ebx: carry
/ ecx: a_len
/ edx:
/ esi: a ptr
/ edi: c ptr
/
.globl s_mpv_div_2dx1d
.type s_mpv_div_2dx1d,@function
s_mpv_div_2dx1d:
push %ebx
mov 8(%esp),%edx
mov 12(%esp),%eax
mov 16(%esp),%ebx
div %ebx
mov 20(%esp),%ebx
mov %eax,0(%ebx)
mov 24(%esp),%ebx
mov %edx,0(%ebx)
xor %eax,%eax / return zero
pop %ebx
ret
nop
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