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* some cleanup and i386_att usage
This commit is contained in:
peter
parent
5cdd60cac8
commit
f11a6ba390
@ -3,6 +3,9 @@
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This file is part of the Free Pascal run time library.
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Copyright (c) 1993,97 by the Free Pascal development team.
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Processor dependent implementation for the system unit for
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intel i386+
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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@ -11,31 +14,145 @@
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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{****************************************************************************
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i386.inc : Processor dependent implementation of the system unit
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for the Intel Ix86, x>=3
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Move / Fill
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****************************************************************************}
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procedure int_help_constructor;
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procedure Move(var source;var dest;count:longint);
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begin
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asm
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.globl HELP_CONSTRUCTOR_NE
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{$IFDEF LINUX}
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.type HELP_CONSTRUCTOR_NE,@function
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{$ENDIF}
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HELP_CONSTRUCTOR_NE:
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movl dest,%edi
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movl source,%esi
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movl %edi,%eax
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movl count,%ebx
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{ Check for back or forward }
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sub %esi,%eax
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jz .LMoveEnd { Do nothing when source=dest }
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jc .LFMove { Do forward, dest<source }
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cmp %ebx,%eax
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jb .LBMove { Dest is in range of move, do backward }
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{ Forward Copy }
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.LFMove:
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cld
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cmpl $15,%ebx
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jl .LFMove1
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%ebx
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rep
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movsb
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movl %ebx,%ecx
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andl $3,%ebx
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shrl $2,%ecx
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rep
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movsl
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.LFMove1:
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movl %ebx,%ecx
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rep
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movsb
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jmp .LMoveEnd
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{ Backward Copy }
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.LBMove:
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std
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addl %ebx,%esi
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addl %ebx,%edi
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movl %edi,%ecx
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decl %esi
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decl %edi
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cmpl $15,%ebx
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jl .LBMove1
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negl %ecx { Align on 32bits }
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andl $3,%ecx
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subl %ecx,%ebx
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rep
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movsb
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movl %ebx,%ecx
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andl $3,%ebx
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shrl $2,%ecx
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subl $3,%esi
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subl $3,%edi
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rep
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movsl
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addl $3,%esi
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addl $3,%edi
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.LBMove1:
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movl %ebx,%ecx
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rep
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movsb
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cld
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.LMoveEnd:
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end;
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end;
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.globl HELP_CONSTRUCTOR
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{$IFDEF LINUX}
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.type HELP_CONSTRUCTOR,@function
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{$ENDIF}
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HELP_CONSTRUCTOR:
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{ Entry without preamble, since we need the ESP of the
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constructor }
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{ Stack (relative to %ebp):
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Procedure FillChar(var x;count:longint;value:byte);[alias: '.L_FILL_OBJECT'];
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begin
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asm
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cld
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movl x,%edi
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movl value,%eax { Only lower 8 bits will be used }
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movl count,%ecx
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cmpl $7,%ecx
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jl .LFill1
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movb %al,%ah
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movl %eax,%ebx
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shll $16,%eax
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movl %ecx,%edx
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movw %bx,%ax
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%edx
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rep
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stosb
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movl %edx,%ecx
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andl $3,%edx
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shrl $2,%ecx
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rep
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stosl
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movl %edx,%ecx
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.LFill1:
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rep
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stosb
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end;
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end;
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procedure fillword(var x;count : longint;value : word);
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begin
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asm
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movl 8(%ebp),%edi
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movl 12(%ebp),%ecx
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movl 16(%ebp),%eax
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movl %eax,%edx
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shll $16,%eax
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movw %dx,%ax
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movl %ecx,%edx
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shrl $1,%ecx
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cld
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rep
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stosl
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movl %edx,%ecx
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andl $1,%ecx
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rep
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stosw
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end ['EAX','ECX','EDX','EDI'];
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end;
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{****************************************************************************
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Object Helpers
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****************************************************************************}
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{$I386_DIRECT}
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procedure int_help_constructor;assembler; [public,alias:'HELP_CONSTRUCTOR'];
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asm
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{ Entry without preamble, since we need the ESP of the constructor
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Stack (relative to %ebp):
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12 Self
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8 VMT-Address
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4 main programm-Addr
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@ -46,8 +163,7 @@ HELP_CONSTRUCTOR:
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{ initialise self ? }
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orl %esi,%esi
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jne .LHC_4
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{ get memory, but save register first }
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{ temporary variable }
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{ get memory, but save register first temporary variable }
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subl $4,%esp
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movl %esp,%esi
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{ Save Register}
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@ -79,32 +195,22 @@ HELP_CONSTRUCTOR:
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pushw $0
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pushl (%eax)
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pushl %esi
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{ }
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call .L_FILL_OBJECT
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popal
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{ set the VMT address for the new created object }
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movl %eax,(%esi)
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orl %eax,%eax
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.LHC_5:
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ret
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end;
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end;
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procedure help_fail;
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begin
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procedure help_fail;assembler;
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asm
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end;
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end;
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procedure int_new_class;assembler;
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procedure int_new_class;assembler;[public,alias:'NEW_CLASS'];
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asm
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.global NEW_CLASS
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{$IFDEF LINUX}
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.type NEW_CLASS,@function
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{$ENDIF}
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NEW_CLASS:
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{ create class ? }
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movl 8(%ebp),%edi
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orl %edi,%edi
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@ -121,17 +227,11 @@ procedure int_new_class;assembler;
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ret
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.LNEW_CLASS1:
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movl %esi,8(%ebp)
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ret
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end;
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procedure int_dispose_class;assembler;
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procedure int_dispose_class;assembler;[public,alias:'DISPOSE_CLASS'];
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asm
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.global DISPOSE_CLASS
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{$IFDEF LINUX}
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.type DISPOSE_CLASS,@function
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{$ENDIF}
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DISPOSE_CLASS:
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{ destroy class ? }
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movl 8(%ebp),%edi
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{ save self }
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@ -147,18 +247,12 @@ procedure int_dispose_class;assembler;
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.LDISPOSE_CLASS1:
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{ load self }
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movl 8(%ebp),%esi
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ret
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end;
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{ checks for a correct vmt pointer }
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procedure co;assembler;
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{ checks for a correct vmt pointer }
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procedure int_check_obhject;assembler;[public,alias:'CHECK_OBJECT'];
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asm
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.globl CHECK_OBJECT
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{$IFDEF LINUX}
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.type CHECK_OBJECT,@function
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{$ENDIF}
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CHECK_OBJECT:
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pushl %edi
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movl 8(%esp),%edi
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pushl %eax
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@ -180,9 +274,8 @@ procedure co;assembler;
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call runerror
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end;
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procedure int_help_destructor;
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begin
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procedure int_help_destructor;assembler;[public,alias:'HELP_DESTRUCTOR'];
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asm
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{ Stack (relative to %ebp):
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12 Self
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@ -190,16 +283,6 @@ procedure int_help_destructor;
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4 Main program-Addr
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0 %ebp
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}
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.globl HELP_DESTRUCTOR_NE
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{$IFDEF LINUX}
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.type HELP_DESTRUCTOR_NE,@function
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{$ENDIF}
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HELP_DESTRUCTOR_NE:
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.globl HELP_DESTRUCTOR
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{$IFDEF LINUX}
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.type HELP_DESTRUCTOR,@function
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{$ENDIF}
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HELP_DESTRUCTOR:
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{ temporary Variable }
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subl $4,%esp
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movl %esp,%edi
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@ -224,105 +307,17 @@ HELP_DESTRUCTOR:
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.LHD_3:
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popal
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addl $4,%esp
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ret
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end;
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end;
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function get_addr(BP : longint) : longint;
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begin
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asm
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movl BP,%eax
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cmpl $0,%eax
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je .Lnul_address
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movl 4(%eax),%eax
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.Lnul_address:
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movl %eax,__RESULT
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end ['EAX'];
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end;
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{****************************************************************************
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String
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****************************************************************************}
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function get_next_frame(bp : longint) : longint;
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begin
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asm
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movl bp,%eax
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cmpl $0,%eax
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je .Lnul_frame
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movl (%eax),%eax
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.Lnul_frame:
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movl %eax,__RESULT
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end ['EAX'];
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end;
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procedure runerror(w : word);[alias: 'runerror'];
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function get_addr : longint;
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begin
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asm
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movl (%ebp),%eax
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movl 4(%eax),%eax
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movl %eax,__RESULT
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end ['EAX'];
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end;
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function get_error_bp : longint;
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begin
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asm
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movl (%ebp),%eax {%ebp of run_error}
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movl %eax,__RESULT
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end ['EAX'];
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end;
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begin
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errorcode:=w;
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exitcode:=w;
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erroraddr:=pointer(get_addr);
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errorbase:=get_error_bp;
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doError:=True;
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halt(errorcode);
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end;
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procedure io1(addr : longint);[public,alias: 'IOCHECK'];
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var
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l : longint;
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begin
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{ Since IOCHECK is called directly and only later the optimiser }
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{ Maybe also save global registers }
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asm
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pushal
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end;
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l:=ioresult;
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if l<>0 then
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begin
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writeln('IO-Error ',l,' at ',addr);
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halt(l);
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end;
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asm
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popal
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end;
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end;
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procedure re_overflow;[public,alias: 'RE_OVERFLOW'];
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var
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addr : longint;
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begin
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{ Overflow was shortly before the return address }
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asm
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movl 4(%ebp),%edi
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movl %edi,addr
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end;
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writeln('Overflow at ',addr);
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RunError(215);
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end;
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{ this procedure must save all modified registers except EDI and ESI !!! }
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procedure strcopy(dstr,sstr:pointer;len:longint);[public,alias:'STRCOPY'];
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{
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this procedure must save all modified registers except EDI and ESI !!!
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}
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begin
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asm
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pushl %eax
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@ -340,7 +335,7 @@ begin
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stosb
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cmpl $7,%eax
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jl .LStrCopy2
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movl %edi,%ecx # Align on 32bits
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%eax
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@ -381,7 +376,7 @@ begin
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addb %al,(%ebx)
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cmpl $7,%eax
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jl .LStrConcat2
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movl %edi,%ecx # Align on 32bits
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%eax
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@ -419,7 +414,7 @@ begin
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.LStrCmp1:
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cmpl $7,%eax
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jl .LStrCmp2
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movl %edi,%ecx # Align on 32bits
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%eax
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@ -467,7 +462,7 @@ begin
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stosb
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cmpl $7,%eax
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jl .LStrPas2
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movl %edi,%ecx # Align on 32bits
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movl %edi,%ecx { Align on 32bits }
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negl %ecx
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andl $3,%ecx
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subl %ecx,%eax
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@ -485,198 +480,131 @@ begin
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end ['ECX','EAX','ESI','EDI'];
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end;
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function strlen(p : pchar) : longint;
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begin
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function strlen(p:pchar):longint;assembler;
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asm
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cld
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movl 8(%ebp),%edi
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movl p,%edi
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movl $0xffffffff,%ecx
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xorl %eax,%eax
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cld
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repne
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scasb
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movl $0xfffffffe,%eax
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subl %ecx,%eax
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leave
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ret $4
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end ['EDI','ECX','EAX'];
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end;
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{****************************************************************************
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Other
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****************************************************************************}
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procedure Move(var source;var dest;count:longint);
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begin
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function get_addr(addrbp:longint):longint;assembler;
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asm
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movl dest,%edi
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movl source,%esi
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movl %edi,%eax
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movl count,%ebx
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## Check for back or forward
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sub %esi,%eax
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jz .LMoveEnd # Do nothing when source=dest
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jc .LFMove # Do forward, dest<source
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cmp %ebx,%eax
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jb .LBMove # Dest is in range of move, do backward
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## Forward Copy
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.LFMove:
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cld
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cmpl $7,%ebx
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jl .LFMove1
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movl %edi,%ecx # Align on 32bits
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negl %ecx
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andl $3,%ecx
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subl %ecx,%ebx
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rep
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movsb
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movl %ebx,%ecx
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andl $3,%ebx
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shrl $2,%ecx
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rep
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movsl
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.LFMove1:
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movl %ebx,%ecx
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rep
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movsb
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jmp .LMoveEnd
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## Backward Copy
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.LBMove:
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std
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addl %ebx,%esi
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addl %ebx,%edi
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movl %edi,%ecx
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decl %esi
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decl %edi
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cmpl $7,%ebx
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jl .LBMove1
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negl %ecx # Align on 32bits
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andl $3,%ecx
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subl %ecx,%ebx
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rep
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movsb
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movl %ebx,%ecx
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andl $3,%ebx
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shrl $2,%ecx
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subl $3,%esi
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subl $3,%edi
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rep
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movsl
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addl $3,%esi
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addl $3,%edi
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.LBMove1:
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movl %ebx,%ecx
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rep
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movsb
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cld
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.LMoveEnd:
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end;
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end;
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movl addrbp,%eax
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orl %eax,%eax
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jz .Lg_a_null
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movl 4(%eax),%eax
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.Lg_a_null:
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end ['EAX'];
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Procedure FillChar(var x;count:longint;value:byte);[alias: '.L_FILL_OBJECT'];
|
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begin
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function get_next_frame(framebp:longint):longint;assembler;
|
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asm
|
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cld
|
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movl x,%edi
|
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movl value,%eax # Only lower 8 bits will be used
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||||
movl count,%ecx
|
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cmpl $7,%ecx
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jl .LFill1
|
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movb %al,%ah
|
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movl %eax,%ebx
|
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shll $16,%eax
|
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movl %ecx,%edx
|
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movw %bx,%ax
|
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movl %edi,%ecx # Align on 32bits
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||||
negl %ecx
|
||||
andl $3,%ecx
|
||||
subl %ecx,%edx
|
||||
rep
|
||||
stosb
|
||||
movl %edx,%ecx
|
||||
andl $3,%edx
|
||||
shrl $2,%ecx
|
||||
rep
|
||||
stosl
|
||||
movl %edx,%ecx
|
||||
.LFill1:
|
||||
rep
|
||||
stosb
|
||||
end;
|
||||
end;
|
||||
movl framebp,%eax
|
||||
orl %eax,%eax
|
||||
jz .Lgnf_null
|
||||
movl (%eax),%eax
|
||||
.Lgnf_null:
|
||||
end ['EAX'];
|
||||
|
||||
|
||||
procedure fillword(var x;count : longint;value : word);
|
||||
procedure runerror(w : word);[alias: 'runerror'];
|
||||
|
||||
function get_addr : longint;
|
||||
|
||||
begin
|
||||
asm
|
||||
movl 8(%ebp),%edi
|
||||
movl 12(%ebp),%ecx
|
||||
movl 16(%ebp),%eax
|
||||
movl %eax,%edx
|
||||
shll $16,%eax
|
||||
movw %dx,%ax
|
||||
movl %ecx,%edx
|
||||
shrl $1,%ecx
|
||||
cld
|
||||
rep
|
||||
stosl
|
||||
movl %edx,%ecx
|
||||
andl $1,%ecx
|
||||
rep
|
||||
stosw
|
||||
end ['EAX','ECX','EDX','EDI'];
|
||||
movl (%ebp),%eax
|
||||
movl 4(%eax),%eax
|
||||
movl %eax,__RESULT
|
||||
end ['EAX'];
|
||||
end;
|
||||
|
||||
|
||||
{$ifndef ordintern}
|
||||
{!!!!!! not very fast, but easy. }
|
||||
function ord(b : boolean) : byte;
|
||||
function get_error_bp : longint;
|
||||
|
||||
begin
|
||||
asm
|
||||
movb 8(%ebp),%al
|
||||
leave
|
||||
ret $2
|
||||
movl (%ebp),%eax {%ebp of run_error}
|
||||
movl %eax,__RESULT
|
||||
end ['EAX'];
|
||||
end;
|
||||
end;
|
||||
{$endif}
|
||||
|
||||
function abs(l : longint) : longint;
|
||||
|
||||
begin
|
||||
errorcode:=w;
|
||||
exitcode:=w;
|
||||
erroraddr:=pointer(get_addr);
|
||||
errorbase:=get_error_bp;
|
||||
doError:=True;
|
||||
halt(errorcode);
|
||||
end;
|
||||
|
||||
procedure io1(addr : longint);[public,alias: 'IOCHECK'];
|
||||
var
|
||||
l : longint;
|
||||
begin
|
||||
{ Since IOCHECK is called directly and only later the optimiser }
|
||||
{ Maybe also save global registers }
|
||||
asm
|
||||
movl 8(%ebp),%eax
|
||||
pushal
|
||||
end;
|
||||
l:=ioresult;
|
||||
if l<>0 then
|
||||
begin
|
||||
writeln('IO-Error ',l,' at ',addr);
|
||||
halt(l);
|
||||
end;
|
||||
asm
|
||||
popal
|
||||
end;
|
||||
end;
|
||||
|
||||
|
||||
procedure re_overflow;[public,alias: 'RE_OVERFLOW'];
|
||||
var
|
||||
addr : longint;
|
||||
begin
|
||||
{ Overflow was shortly before the return address }
|
||||
asm
|
||||
movl 4(%ebp),%edi
|
||||
movl %edi,addr
|
||||
end;
|
||||
writeln('Overflow at ',addr);
|
||||
RunError(215);
|
||||
end;
|
||||
|
||||
|
||||
function abs(l:longint):longint;assembler;
|
||||
asm
|
||||
movl l,%eax
|
||||
orl %eax,%eax
|
||||
jns .LMABS1
|
||||
negl %eax
|
||||
.LMABS1:
|
||||
leave
|
||||
ret $4
|
||||
end ['EAX'];
|
||||
end;
|
||||
|
||||
|
||||
function odd(l : longint) : boolean;
|
||||
|
||||
begin
|
||||
function odd(l:longint):boolean;assembler;
|
||||
asm
|
||||
movl 8(%ebp),%eax
|
||||
movl l,%eax
|
||||
andl $1,%eax
|
||||
setnz %al
|
||||
leave
|
||||
ret $4
|
||||
end ['EAX'];
|
||||
end;
|
||||
|
||||
function sqr(l : longint) : longint;
|
||||
|
||||
begin
|
||||
function sqr(l:longint):longint;assembler;
|
||||
asm
|
||||
movl 8(%ebp),%eax
|
||||
mov l,%eax
|
||||
imull %eax,%eax
|
||||
leave
|
||||
ret $4
|
||||
end ['EAX'];
|
||||
end;
|
||||
|
||||
|
||||
{$ifndef str_intern }
|
||||
procedure str(l : longint;var s : string);
|
||||
@ -773,6 +701,7 @@ function sqr(l : longint) : longint;
|
||||
end;
|
||||
end;
|
||||
|
||||
|
||||
Function Sptr : Longint;
|
||||
begin
|
||||
asm
|
||||
@ -782,24 +711,33 @@ begin
|
||||
end ['EAX'];
|
||||
end;
|
||||
|
||||
Function Random(L: LongInt): LongInt;{assembler;
|
||||
|
||||
{$I386_ATT}
|
||||
|
||||
Function Random(L: LongInt): LongInt;assembler;
|
||||
asm
|
||||
movl $134775813,%eax
|
||||
mull U_SYSTEM_RANDSEED
|
||||
mull RandSeed
|
||||
incl %eax
|
||||
movl %eax,U_SYSTEM_RANDSEED
|
||||
movl %eax,RandSeed
|
||||
mull 4(%esp)
|
||||
movl %edx,%eax
|
||||
end;}
|
||||
|
||||
end;
|
||||
{
|
||||
begin
|
||||
Randseed:=Randseed*134775813+1;
|
||||
Random:=abs(Randseed mod l);
|
||||
end;
|
||||
}
|
||||
|
||||
{$I386_DIRECT}
|
||||
|
||||
{
|
||||
$Log$
|
||||
Revision 1.4 1998-04-10 15:41:54 florian
|
||||
Revision 1.5 1998-04-29 13:28:19 peter
|
||||
* some cleanup and i386_att usage
|
||||
|
||||
Revision 1.4 1998/04/10 15:41:54 florian
|
||||
+ some small comments added
|
||||
|
||||
Revision 1.3 1998/04/10 15:25:23 michael
|
||||
|
||||
Loading…
Reference in New Issue
Block a user