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boot: a little dereferencing to make things a bit faster

This commit is contained in:
Virgil Dupras 2020-04-20 23:30:08 -04:00
parent e569e40665
commit ae14c55feb
2 changed files with 5 additions and 3 deletions
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emul/forth/z80c.bin
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forth/boot.z80
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@ -281,6 +281,7 @@ PC ORG @ 0x1b + ! ( next )
IY INCss,
( continue to execute )
L3 BSET
PC ORG @ 0x34 + ! ( execute )
( DE points to wordref )
EXDEHL,
@ -292,6 +293,7 @@ PC ORG @ 0x34 + ! ( execute )
( DE points to PFA )
JP(HL),
L1 BSET
PC ORG @ 0x0f + ! ( compiledWord )
( Execute a list of atoms, which always end with EXIT.
DE points to that list. What do we do:
@ -308,7 +310,7 @@ PC ORG @ 0x0f + ! ( compiledWord )
D (HL) LDrr,
HL INCss,
HL PUSHqq, IY POPqq, ( --> IP )
0x33 JPnn, ( 33 == execute )
JR, L3 BWR ( execute )
PC ORG @ 0x0c + ! ( cellWord )
( Pushes PFA directly )
@ -330,7 +332,7 @@ PC ORG @ 0x2c + ! ( doesWord )
E (HL) LDrr,
HL INCss,
D (HL) LDrr,
0x0e JPnn, ( 0e == compiledWord )
JR, L1 BWR ( compiledWord )
( Core words )
KEY and EMIT are not defined here. There're
@ -340,7 +342,7 @@ PC ORG @ 0x2c + ! ( doesWord )
CODE EXECUTE
DE POPqq,
chkPS,
0x33 JPnn, ( 33 == execute )
JR, L3 BWR ( execute )
( a b c -- b c a )
CODE ROT