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* some small optimizations and bugfixes
This commit is contained in:
Jonas Maebe
parent
4e942c9a0f
commit
912d568353
@ -58,7 +58,9 @@ LStrlCopyLoop:
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cmpli r30,0
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stbu r30,1(r29)
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bdnzne LStrlCopyLoop
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{ if we stopped because we copied a #0, we're done }
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beq LStrlCopyDone
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{ otherwise add the #0 }
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li r30,0
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stb r30,1(r29)
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LStrlCopyDone:
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@ -119,10 +121,9 @@ LStrCompLoop:
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{ if chars not equal, we're ready }
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bne LStrCompDone
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{ if they are equal and one is zero, then the other one is zero too }
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{ and we're done as well (r3 does contain as well) }
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beq cr1,LStrCompDone
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{ and we're done as well (r3 also contains 0 then) }
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{ otherwise loop }
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b LStrCompLoop
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bne cr1,LStrCompLoop
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LStrCompDone:
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end ['r3','r4','r28','r29','r30','cr0','cr1'];
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@ -151,10 +152,9 @@ LStrlCompLoop:
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{ if chars not equal, we're ready }
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bne LStrlCompDone
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{ if they are equal and one is zero, then the other one is zero too }
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{ and we're done as well (r3 does contain as well) }
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beq cr1,LStrlCompDone
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{ otherwise loop }
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bdnz LStrlCompLoop
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{ and we're done as well (r3 also contains 0 then) }
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{ otherwise loop (if ctr <> 0) }
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bdnzne cr1,LStrlCompLoop
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LStrlCompDone:
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end ['r3','r4','r28','r29','r30','cr0','cr1','ctr'];
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@ -175,33 +175,40 @@ LStriCompLoop:
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{ calculate difference }
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sub. r3,r29,r30
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{ if chars are equal, no further test is necessary }
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beq LStriCompEqual
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beq+ LStriCompEqual
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{ make both lowercase, no branches }
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li r27,0
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li r25,0
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{ r3 := r29 - 'A' }
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subic r3,r29,'A'
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{ if r29 < 'A' then r27 := 0 else r27 := $ffffffff }
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addme r27,r27
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{ same for r30 }
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subic r3,r30,'A'
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addme r25,r25
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{ r3 := 'Z' - r29 }
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subfic r3,r29,'Z'
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{ if r29 < 'A' then r27 := 0 else r27 := $20 }
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andi r27,r27,0x020
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{ if r29 > Z then r26 := 0 else r26 := $ffffffff
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subfe r26,r26,r26
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{ same for r30 }
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subfic r3,r30,'Z'
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andi r25,r25,0x020
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subfe r24,r24,r24
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{ if (r29 in ['A'..'Z'] then r27 := $20 else r27 := 0 }
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and r27,r27,r26
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{ same for r30 }
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and r25,r25,r24
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{ make lowercase }
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add r29,r29,r27
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{ same for r30 }
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li r27,0
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subic r3,r30,'A'
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addme r27,r27
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subfic r3,r30,'Z'
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andi r27,r27,0x020
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subfe r26,r26,r26
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and r27,r27,r26
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add r30,r30,r27
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add r30,r30,r25
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{ compare again }
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sub. r3,r29,r30
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@ -209,11 +216,10 @@ LStriCompLoop:
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LStriCompEqual:
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{ if they are equal and one is zero, then the other one is zero too }
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{ and we're done as well (r3 also contains 0 then) }
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beq cr1,LStriCompDone
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{ otherwise loop }
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b LStriCompLoop
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bne LStriCompLoop
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LStriCompDone:
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end ['r3','r4','r26,'r27','r28','r29','r30','cr0','cr1'];
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end ['r3','r4','r26','r27','r28','r29','r30','cr0','cr1'];
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function strlicomp(str1,str2 : pchar;l : longint) : longint;assembler;
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@ -237,27 +243,28 @@ LStriCompLoop:
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{ calculate difference }
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sub. r3,r29,r30
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{ if chars are equal, no further test is necessary }
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beq LStriCompEqual
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beq+ LStriCompEqual
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{ see stricomp for explanation }
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li r27,0
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li r25,0
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subic r3,r29,'A'
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addme r27,r27
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subic r3,r30,'A'
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addme r25,r25
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subfic r3,r29,'Z'
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andi r27,r27,0x020
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subfe r26,r26,r26
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and r27,r27,r26
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add r29,r29,r27
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{ same for r30 }
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li r27,0
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subic r3,r30,'A'
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addme r27,r27
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subfic r3,r30,'Z'
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andi r27,r27,0x020
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subfe r26,r26,r26
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andi r25,r25,0x020
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subfe r24,r24,r24
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and r27,r27,r26
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add r30,r30,r27
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and r25,r25,r24
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add r29,r29,r27
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add r30,r30,r25
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{ compare again }
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sub. r3,r29,r30
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@ -265,11 +272,10 @@ LStriCompLoop:
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LStriCompEqual:
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{ if they are equal and one is zero, then the other one is zero too }
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{ and we're done as well (r3 also contains 0 then) }
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beq cr1,LStriCompDone
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{ otherwise loop }
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bdnz LStriCompLoop
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{ otherwise loop (if ctr <> 0) }
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bdnzne cr1,LStriCompLoop
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LStriCompDone:
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end ['r3','r4','r26,'r27','r28','r29','r30','cr0','cr1','ctr'];
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end ['r3','r4','r26','r27','r28','r29','r30','cr0','cr1','ctr'];
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function strscan(p : pchar;c : char) : pchar;assembler;
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@ -359,7 +365,10 @@ end ['r28','r29','r30','cr0','cr1'];
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{
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$Log$
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Revision 1.3 2001-02-10 16:09:43 jonas
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Revision 1.4 2001-02-11 12:15:03 jonas
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* some small optimizations and bugfixes
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Revision 1.3 2001/02/10 16:09:43 jonas
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+ implemented all missing routines and changed reg allocation to follow ABI
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Revision 1.2 2001/02/10 12:28:22 jonas
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@ -55,8 +55,10 @@ asm
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{ get length }
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lbz r30,0(r4)
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{ put in counter }
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cmpli r30,0
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mtctr r30
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subi r29,r3,1
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beq LStrCopyEmpty
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LStrPCopyLoop:
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{ copy everything }
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lbzu r30,1(r4)
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@ -64,12 +66,16 @@ LStrPCopyLoop:
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bdnz LStrCopyLoop
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{ add terminating #0 }
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li r30,0
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LStrCopyEmpty:
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stb r30,1(r29)
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end ['r4','r29','r30','ctr'];
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end ['r4','r29','r30','cr0','ctr'];
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{
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$Log$
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Revision 1.1 2001-02-10 16:10:32 jonas
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Revision 1.2 2001-02-11 12:15:03 jonas
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* some small optimizations and bugfixes
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Revision 1.1 2001/02/10 16:10:32 jonas
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* initial implementation: everything implemented, nothing tested
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