Source code
Revision control
Copy as Markdown
Other Tools
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
.data
.align 4
#
# -1 means to call s_mpi_is_sse to determine if we support sse
# instructions.
# 0 means to use x86 instructions
# 1 means to use sse2 instructions
.type is_sse,@object
.size is_sse,4
is_sse: .long -1
#
# sigh, handle the difference between -fPIC and not PIC
# default to pic, since this file seems to be exclusively
# linux right now (solaris uses mpi_i86pc.s and windows uses
# mpi_x86_asm.c)
#
.ifndef NO_PIC
.macro GET var,reg
movl \var@GOTOFF(%ebx),\reg
.endm
.macro PUT reg,var
movl \reg,\var@GOTOFF(%ebx)
.endm
.else
.macro GET var,reg
movl \var,\reg
.endm
.macro PUT reg,var
movl \reg,\var
.endm
.endif
.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:
GET is_sse,%eax
cmp $0,%eax
je s_mpv_mul_d_x86
jg s_mpv_mul_d_sse2
call s_mpi_is_sse2
PUT %eax,is_sse
cmp $0,%eax
jg s_mpv_mul_d_sse2
s_mpv_mul_d_x86:
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 2f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
1:
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 1b # jmp if a_len != 0
2:
mov %ebx,0(%edi) # *c = carry
pop %ebx
pop %esi
pop %edi
leave
ret
nop
s_mpv_mul_d_sse2:
push %ebp
mov %esp,%ebp
push %edi
push %esi
psubq %mm2,%mm2 # carry = 0
mov 12(%ebp),%ecx # ecx = a_len
movd 16(%ebp),%mm1 # mm1 = b
mov 20(%ebp),%edi
cmp $0,%ecx
je 6f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
5:
movd 0(%esi),%mm0 # mm0 = *a++
add $4,%esi
pmuludq %mm1,%mm0 # mm0 = b * *a++
paddq %mm0,%mm2 # add the carry
movd %mm2,0(%edi) # store the 32bit result
add $4,%edi
psrlq $32, %mm2 # save the carry
dec %ecx # --a_len
jnz 5b # jmp if a_len != 0
6:
movd %mm2,0(%edi) # *c = carry
emms
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:
GET is_sse,%eax
cmp $0,%eax
je s_mpv_mul_d_add_x86
jg s_mpv_mul_d_add_sse2
call s_mpi_is_sse2
PUT %eax,is_sse
cmp $0,%eax
jg s_mpv_mul_d_add_sse2
s_mpv_mul_d_add_x86:
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 11f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
10:
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 10b # jmp if a_len != 0
11:
mov %ebx,0(%edi) # *c = carry
pop %ebx
pop %esi
pop %edi
leave
ret
nop
s_mpv_mul_d_add_sse2:
push %ebp
mov %esp,%ebp
push %edi
push %esi
psubq %mm2,%mm2 # carry = 0
mov 12(%ebp),%ecx # ecx = a_len
movd 16(%ebp),%mm1 # mm1 = b
mov 20(%ebp),%edi
cmp $0,%ecx
je 16f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
15:
movd 0(%esi),%mm0 # mm0 = *a++
add $4,%esi
pmuludq %mm1,%mm0 # mm0 = b * *a++
paddq %mm0,%mm2 # add the carry
movd 0(%edi),%mm0
paddq %mm0,%mm2 # add the carry
movd %mm2,0(%edi) # store the 32bit result
add $4,%edi
psrlq $32, %mm2 # save the carry
dec %ecx # --a_len
jnz 15b # jmp if a_len != 0
16:
movd %mm2,0(%edi) # *c = carry
emms
pop %esi
pop %edi
leave
ret
nop
# ebp - 8: caller's esi
# ebp - 4: caller's edi
# 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:
GET is_sse,%eax
cmp $0,%eax
je s_mpv_mul_d_add_prop_x86
jg s_mpv_mul_d_add_prop_sse2
call s_mpi_is_sse2
PUT %eax,is_sse
cmp $0,%eax
jg s_mpv_mul_d_add_prop_sse2
s_mpv_mul_d_add_prop_x86:
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 21f # jmp if a_len == 0
cld
mov 8(%ebp),%esi # esi = a
20:
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 20b # jmp if a_len != 0
21:
cmp $0,%ebx # is carry zero?
jz 23f
mov 0(%edi),%eax # add in current word from *c
add %ebx,%eax
stosl # [es:edi] = ax; edi += 4;
jnc 23f
22:
mov 0(%edi),%eax # add in current word from *c
adc $0,%eax
stosl # [es:edi] = ax; edi += 4;
jc 22b
23:
pop %ebx
pop %esi
pop %edi
leave
ret
nop
s_mpv_mul_d_add_prop_sse2:
push %ebp
mov %esp,%ebp
push %edi
push %esi
push %ebx
psubq %mm2,%mm2 # carry = 0
mov 12(%ebp),%ecx # ecx = a_len
movd 16(%ebp),%mm1 # mm1 = b
mov 20(%ebp),%edi
cmp $0,%ecx
je 26f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
25:
movd 0(%esi),%mm0 # mm0 = *a++
movd 0(%edi),%mm3 # fetch the sum
add $4,%esi
pmuludq %mm1,%mm0 # mm0 = b * *a++
paddq %mm0,%mm2 # add the carry
paddq %mm3,%mm2 # add *c++
movd %mm2,0(%edi) # store the 32bit result
add $4,%edi
psrlq $32, %mm2 # save the carry
dec %ecx # --a_len
jnz 25b # jmp if a_len != 0
26:
movd %mm2,%ebx
cmp $0,%ebx # is carry zero?
jz 28f
mov 0(%edi),%eax
add %ebx, %eax
stosl
jnc 28f
27:
mov 0(%edi),%eax # add in current word from *c
adc $0,%eax
stosl # [es:edi] = ax; edi += 4;
jc 27b
28:
emms
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:
GET is_sse,%eax
cmp $0,%eax
je s_mpv_sqr_add_prop_x86
jg s_mpv_sqr_add_prop_sse2
call s_mpi_is_sse2
PUT %eax,is_sse
cmp $0,%eax
jg s_mpv_sqr_add_prop_sse2
s_mpv_sqr_add_prop_x86:
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 31f # jump if a_len == 0
cld
mov 8(%ebp),%esi # esi = pa
30:
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 30b # jmp if a_len != 0
31:
cmp $0,%ebx # is carry zero?
jz 34f
mov 0(%edi),%eax # add in current word from *c
add %ebx,%eax
stosl # [es:edi] = ax; edi += 4;
jnc 34f
32:
mov 0(%edi),%eax # add in current word from *c
adc $0,%eax
stosl # [es:edi] = ax; edi += 4;
jc 32b
34:
pop %ebx
pop %esi
pop %edi
leave
ret
nop
s_mpv_sqr_add_prop_sse2:
push %ebp
mov %esp,%ebp
push %edi
push %esi
push %ebx
psubq %mm2,%mm2 # carry = 0
mov 12(%ebp),%ecx # ecx = a_len
mov 16(%ebp),%edi
cmp $0,%ecx
je 36f # jmp if a_len == 0
mov 8(%ebp),%esi # esi = a
cld
35:
movd 0(%esi),%mm0 # mm0 = *a
movd 0(%edi),%mm3 # fetch the sum
add $4,%esi
pmuludq %mm0,%mm0 # mm0 = sqr(a)
paddq %mm0,%mm2 # add the carry
paddq %mm3,%mm2 # add the low word
movd 4(%edi),%mm3
movd %mm2,0(%edi) # store the 32bit result
psrlq $32, %mm2
paddq %mm3,%mm2 # add the high word
movd %mm2,4(%edi) # store the 32bit result
psrlq $32, %mm2 # save the carry.
add $8,%edi
dec %ecx # --a_len
jnz 35b # jmp if a_len != 0
36:
movd %mm2,%ebx
cmp $0,%ebx # is carry zero?
jz 38f
mov 0(%edi),%eax
add %ebx, %eax
stosl
jnc 38f
37:
mov 0(%edi),%eax # add in current word from *c
adc $0,%eax
stosl # [es:edi] = ax; edi += 4;
jc 37b
38:
emms
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
# Magic indicating no need for an executable stack
.section .note.GNU-stack, "", @progbits
.previous