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# Copyright (C) 2000 MySQL AB
# 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 of the License, 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
# Optimized longlong2str function for Intel 80x86 (gcc/gas syntax)
# Some set sequences are optimized for pentuimpro II
.file "longlong2str.s"
.version "1.01"
.text
.align 4
.globl longlong2str
.type longlong2str,@function
longlong2str:
subl $80,%esp
pushl %ebp
pushl %esi
pushl %edi
pushl %ebx
movl 100(%esp),%esi # Lower part of val
movl 104(%esp),%ebp # Higher part of val
movl 108(%esp),%edi # get dst
movl 112(%esp),%ebx # Radix
movl %ebx,%eax
testl %eax,%eax
jge .L144
addl $36,%eax
cmpl $34,%eax
ja .Lerror # Wrong radix
testl %ebp,%ebp
jge .L146
movb $45,(%edi) # Add sign
incl %edi # Change sign of val
negl %esi
adcl $0,%ebp
negl %ebp
.L146:
negl %ebx # Change radix to positive
jmp .L148
.align 4
.L144:
addl $-2,%eax
cmpl $34,%eax
ja .Lerror # Radix in range
.L148:
movl %esi,%eax # Test if zero (for easy loop)
orl %ebp,%eax
jne .L150
movb $48,(%edi)
incl %edi
jmp .L10_end
.align 4
.L150:
leal 92(%esp),%ecx # End of buffer
jmp .L155
.align 4
.L153:
# val is stored in in ebp:esi
movl %ebp,%eax # High part of value
xorl %edx,%edx
divl %ebx
movl %eax,%ebp
movl %esi,%eax
divl %ebx
decl %ecx
movl %eax,%esi # quotent in ebp:esi
movb _dig_vec(%edx),%al # al is faster than dl
movb %al,(%ecx) # store value in buff
.align 4
.L155:
testl %ebp,%ebp
ja .L153
testl %esi,%esi # rest value
jl .L153
je .L10_mov # Ready
movl %esi,%eax
movl $_dig_vec,%ebp
.align 4
.L154: # Do rest with integer precision
cltd
divl %ebx
decl %ecx
movb (%edx,%ebp),%dl # bh is always zero as ebx=radix < 36
testl %eax,%eax
movb %dl,(%ecx)
jne .L154
.L10_mov:
movl %ecx,%esi
leal 92(%esp),%ecx # End of buffer
subl %esi,%ecx
rep
movsb
.L10_end:
movl %edi,%eax # Pointer to end null
movb $0,(%edi) # Store the end null
.L165:
popl %ebx
popl %edi
popl %esi
popl %ebp
addl $80,%esp
ret
.Lerror:
xorl %eax,%eax # Wrong radix
jmp .L165
.Lfe3:
.size longlong2str,.Lfe3-longlong2str
#
# This is almost equal to the above, except that we can do the final
# loop much more efficient
#
.align 4
.Ltmp:
.long 0xcccccccd
.align 4
.globl longlong10_to_str
.type longlong10_str,@function
longlong10_to_str:
subl $80,%esp
pushl %ebp
pushl %esi
pushl %edi
pushl %ebx
movl 100(%esp),%esi # Lower part of val
movl 104(%esp),%ebp # Higher part of val
movl 108(%esp),%edi # get dst
movl 112(%esp),%ebx # Radix (10 or -10)
testl %ebx,%ebx
jge .L10_10 # Positive radix
negl %ebx # Change radix to positive (= 10)
testl %ebp,%ebp # Test if negative value
jge .L10_10
movb $45,(%edi) # Add sign
incl %edi
negl %esi # Change sign of val (ebp:esi)
adcl $0,%ebp
negl %ebp
.align 4
.L10_10:
leal 92(%esp),%ecx # End of buffer
movl %esi,%eax # Test if zero (for easy loop)
orl %ebp,%eax
jne .L10_30 # Not zero
# Here when value is zero
movb $48,(%edi)
incl %edi
jmp .L10_end
.align 4
.L10_20:
# val is stored in in ebp:esi
movl %ebp,%eax # High part of value
xorl %edx,%edx
divl %ebx # Divide by 10
movl %eax,%ebp
movl %esi,%eax
divl %ebx # Divide by 10
decl %ecx
movl %eax,%esi # quotent in ebp:esi
addl $48,%edx # Convert to ascii
movb %dl,(%ecx) # store value in buff
.L10_30:
testl %ebp,%ebp
ja .L10_20
testl %esi,%esi # rest value
jl .L10_20 # Unsigned, do ulonglong div once more
je .L10_mov # Ready
movl %esi,%ebx # Move val to %ebx
# The following code uses some tricks to change division by 10 to
# multiplication and shifts
movl .Ltmp,%esi # set %esi to 0xcccccccd
.L10_40:
movl %ebx,%eax
mull %esi
decl %ecx
shrl $3,%edx
leal (%edx,%edx,4),%eax
addl %eax,%eax
subb %al,%bl # %bl now contains val % 10
addb $48,%bl
movb %bl,(%ecx)
movl %edx,%ebx
testl %ebx,%ebx
jne .L10_40
jmp .L10_mov # Shared end with longlong10_to_str
.L10end:
.size longlong10_to_str,.L10end-longlong10_to_str
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