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z80: move lbluflw code around

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with uflw checks not being in next anymore, we can save ourselves
a forward jump.
This commit is contained in:
Virgil Dupras 2020-08-08 08:19:31 -04:00
parent d1de99d8c9
commit 5adbf88591
6 changed files with 8 additions and 8 deletions
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2
blk/282
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@ -1 +1 @@
VARIABLE lblofl VARIABLE lblexec VARIABLE lbluflw VARIABLE lblexec

3
blk/285
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@ -1,3 +0,0 @@
lblofl BSET ( abortUnderflow )
DE BIN( @ 0x06 ( uflw ) + LDdd(n),
JR, L2 FWR ( execute, B287 )

2
blk/286
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@ -8,7 +8,7 @@ lblnext BSET PC ORG @ 0x1b + ! ( next )
IFNC, ( SP <= IX? overflow ) IFNC, ( SP <= IX? overflow )
SP PS_ADDR LDdn, IX RS_ADDR LDdn, SP PS_ADDR LDdn, IX RS_ADDR LDdn,
DE BIN( @ 0x13 ( oflw ) + LDdd(n), DE BIN( @ 0x13 ( oflw ) + LDdd(n),
JR, L3 FWR ( execute, B287 ) JR, L2 FWR ( execute, B287 )
THEN, THEN,
LDA(BC), E A LDrr, BC INCd, LDA(BC), E A LDrr, BC INCd,
LDA(BC), D A LDrr, BC INCd, LDA(BC), D A LDrr, BC INCd,

2
blk/287
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@ -1,4 +1,4 @@
lblexec BSET L1 FSET ( B284 ) L2 FSET ( B285 ) L3 FSET ( B286 ) lblexec BSET L1 FSET ( B284 ) L2 FSET ( B286 )
( DE -> wordref ) ( DE -> wordref )
( When we have a BIN( offset, we need to adjust stable ( When we have a BIN( offset, we need to adjust stable
ABI offsets. ) ABI offsets. )

5
blk/290
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@ -1,3 +1,6 @@
lbluflw BSET ( abortUnderflow )
DE BIN( @ 0x06 ( uflw ) + LDdd(n),
JR, lblexec BWR
lblchkPS BSET ( chkPS ) lblchkPS BSET ( chkPS )
( Note that you only need to call this in words that push ( Note that you only need to call this in words that push
back to PSP. If they don't, calling chkPS is redundant with back to PSP. If they don't, calling chkPS is redundant with
@ -9,4 +12,4 @@ lblchkPS BSET ( chkPS )
SP SUBHLd, SP SUBHLd,
EXX, EXX,
CNC RETc, ( PS_ADDR >= SP? good ) CNC RETc, ( PS_ADDR >= SP? good )
JR, lblofl BWR ( abortUnderflow-B298 ) JR, lbluflw BWR

2
blk/310
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@ -10,6 +10,6 @@ CODE PICK EXX, ( protect BC )
EXDEHL, EXDEHL,
HL PS_ADDR LDdn, HL PS_ADDR LDdn,
DE SUBHLd, DE SUBHLd,
IFC, EXX, lblofl @ JP, THEN, IFC, EXX, lbluflw @ JP, THEN,
BC PUSH, BC PUSH,
EXX, ( unprotect BC ) ;CODE EXX, ( unprotect BC ) ;CODE