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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 )
SP PS_ADDR LDdn, IX RS_ADDR LDdn,
DE BIN( @ 0x13 ( oflw ) + LDdd(n),
JR, L3 FWR ( execute, B287 )
JR, L2 FWR ( execute, B287 )
THEN,
LDA(BC), E 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 )
( When we have a BIN( offset, we need to adjust stable
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 )
( Note that you only need to call this in words that push
back to PSP. If they don't, calling chkPS is redundant with
@ -9,4 +12,4 @@ lblchkPS BSET ( chkPS )
SP SUBHLd,
EXX,
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,
HL PS_ADDR LDdn,
DE SUBHLd,
IFC, EXX, lblofl @ JP, THEN,
IFC, EXX, lbluflw @ JP, THEN,
BC PUSH,
EXX, ( unprotect BC ) ;CODE