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https://github.com/MariaDB/server.git
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223 lines
4.6 KiB
ArmAsm
223 lines
4.6 KiB
ArmAsm
# Copyright (C) 2000 MySQL AB
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Optimized longlong2str function for Intel 80x86 (gcc/gas syntax)
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# Some set sequences are optimized for pentuimpro II
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.file "longlong2str.s"
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.version "1.01"
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.text
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.align 4
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.globl longlong2str
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.type longlong2str,@function
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longlong2str:
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subl $80,%esp
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pushl %ebp
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pushl %esi
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pushl %edi
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pushl %ebx
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movl 100(%esp),%esi # Lower part of val
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movl 104(%esp),%ebp # Higher part of val
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movl 108(%esp),%edi # get dst
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movl 112(%esp),%ebx # Radix
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movl %ebx,%eax
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testl %eax,%eax
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jge .L144
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addl $36,%eax
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cmpl $34,%eax
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ja .Lerror # Wrong radix
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testl %ebp,%ebp
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jge .L146
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movb $45,(%edi) # Add sign
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incl %edi # Change sign of val
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negl %esi
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adcl $0,%ebp
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negl %ebp
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.L146:
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negl %ebx # Change radix to positive
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jmp .L148
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.align 4
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.L144:
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addl $-2,%eax
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cmpl $34,%eax
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ja .Lerror # Radix in range
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.L148:
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movl %esi,%eax # Test if zero (for easy loop)
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orl %ebp,%eax
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jne .L150
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movb $48,(%edi)
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incl %edi
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jmp .L10_end
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.align 4
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.L150:
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leal 92(%esp),%ecx # End of buffer
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jmp .L155
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.align 4
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.L153:
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# val is stored in in ebp:esi
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movl %ebp,%eax # High part of value
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xorl %edx,%edx
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divl %ebx
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movl %eax,%ebp
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movl %esi,%eax
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divl %ebx
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decl %ecx
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movl %eax,%esi # quotent in ebp:esi
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movb _dig_vec(%edx),%al # al is faster than dl
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movb %al,(%ecx) # store value in buff
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.align 4
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.L155:
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testl %ebp,%ebp
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ja .L153
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testl %esi,%esi # rest value
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jl .L153
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je .L10_mov # Ready
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movl %esi,%eax
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movl $_dig_vec,%ebp
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.align 4
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.L154: # Do rest with integer precision
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cltd
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divl %ebx
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decl %ecx
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movb (%edx,%ebp),%dl # bh is always zero as ebx=radix < 36
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testl %eax,%eax
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movb %dl,(%ecx)
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jne .L154
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.L10_mov:
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movl %ecx,%esi
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leal 92(%esp),%ecx # End of buffer
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subl %esi,%ecx
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rep
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movsb
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.L10_end:
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movl %edi,%eax # Pointer to end null
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movb $0,(%edi) # Store the end null
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.L165:
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popl %ebx
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popl %edi
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popl %esi
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popl %ebp
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addl $80,%esp
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ret
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.Lerror:
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xorl %eax,%eax # Wrong radix
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jmp .L165
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.Lfe3:
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.size longlong2str,.Lfe3-longlong2str
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#
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# This is almost equal to the above, except that we can do the final
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# loop much more efficient
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#
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.align 4
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.Ltmp:
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.long 0xcccccccd
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.align 4
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.globl longlong10_to_str
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.type longlong10_str,@function
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longlong10_to_str:
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subl $80,%esp
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pushl %ebp
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pushl %esi
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pushl %edi
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pushl %ebx
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movl 100(%esp),%esi # Lower part of val
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movl 104(%esp),%ebp # Higher part of val
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movl 108(%esp),%edi # get dst
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movl 112(%esp),%ebx # Radix (10 or -10)
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testl %ebx,%ebx
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jge .L10_10 # Positive radix
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negl %ebx # Change radix to positive (= 10)
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testl %ebp,%ebp # Test if negative value
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jge .L10_10
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movb $45,(%edi) # Add sign
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incl %edi
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negl %esi # Change sign of val (ebp:esi)
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adcl $0,%ebp
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negl %ebp
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.align 4
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.L10_10:
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leal 92(%esp),%ecx # End of buffer
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movl %esi,%eax # Test if zero (for easy loop)
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orl %ebp,%eax
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jne .L10_30 # Not zero
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# Here when value is zero
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movb $48,(%edi)
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incl %edi
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jmp .L10_end
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.align 4
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.L10_20:
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# val is stored in in ebp:esi
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movl %ebp,%eax # High part of value
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xorl %edx,%edx
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divl %ebx # Divide by 10
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movl %eax,%ebp
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movl %esi,%eax
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divl %ebx # Divide by 10
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decl %ecx
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movl %eax,%esi # quotent in ebp:esi
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addl $48,%edx # Convert to ascii
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movb %dl,(%ecx) # store value in buff
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.L10_30:
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testl %ebp,%ebp
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ja .L10_20
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testl %esi,%esi # rest value
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jl .L10_20 # Unsigned, do ulonglong div once more
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je .L10_mov # Ready
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movl %esi,%ebx # Move val to %ebx
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# The following code uses some tricks to change division by 10 to
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# multiplication and shifts
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movl .Ltmp,%esi # set %esi to 0xcccccccd
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.L10_40:
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movl %ebx,%eax
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mull %esi
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decl %ecx
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shrl $3,%edx
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leal (%edx,%edx,4),%eax
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addl %eax,%eax
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subb %al,%bl # %bl now contains val % 10
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addb $48,%bl
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movb %bl,(%ecx)
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movl %edx,%ebx
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testl %ebx,%ebx
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jne .L10_40
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jmp .L10_mov # Shared end with longlong10_to_str
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.L10end:
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.size longlong10_to_str,.L10end-longlong10_to_str
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