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Signed comparisons now work correctly; sadly, Star Trek increases from 39656 to

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39726 bytes. Note that the emulator doesn't set P/V correctly and all the tests
fail. Testing in z80ex works fine.
This commit is contained in:
David Given 2019-02-11 20:46:06 +01:00
parent 34e9573929
commit f1b128baeb
3 changed files with 28 additions and 5 deletions
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10
mach/i80/libem/rst.s
View file

@ -17,6 +17,11 @@
shld 0x11
lxi h, rst3
shld 0x19
lhld rst4
shld 0x20
lhld rst4+2
shld 0x22
ret
! de = [bc+const1] (remember bc is the frame pointer)
@ -70,3 +75,8 @@ rst3:
dad b
ret
! Adjust flags for signed comparison
rst4:
rpo
xri 0x80
ret

18
mach/i80/ncg/table
View file

@ -13,6 +13,12 @@ EM_WSIZE = 2
EM_PSIZE = 2
EM_BSIZE = 4
#ifdef USE_I80_RSTS
#define SIGN_ADJUST rst {const1, 4}
#else
#define SIGN_ADJUST jpo {label, 1f} xri {const1, 0x80} 1:
#endif
SL=4
PROPERTIES
@ -103,7 +109,7 @@ INSTRUCTIONS
jnz label:ro cost(3,10).
jp label:ro cost(3,10).
/* jpe label:ro cost(3,10). */
/* jpo label:ro cost(3,10). */
jpo label:ro cost(3,10).
jz label:ro cost(3,10).
lda label:ro kills a cost(3,13).
ldax regind:ro kills a cost(1, 7).
@ -1860,6 +1866,7 @@ pat blt
sui {const1, %1.num & 0xff}
mov a, %2.1
sbi {const1, %1.num >> 8}
SIGN_ADJUST
jm {label, $1}
with hl_or_de const2 STACK
uses areg
@ -1868,14 +1875,16 @@ pat blt
sub %1.2
mvi a, {const1, %2.num >> 8}
sbb %1.1
SIGN_ADJUST
jm {label, $1}
with hl_or_de hl_or_de STACK
uses areg
gen
mov a,%2.2
mov a, %2.2
sub %1.2
mov a,%2.1
mov a, %2.1
sbb %1.1
SIGN_ADJUST
jm {label,$1}
pat bgt
@ -1891,6 +1900,7 @@ pat bge
sui {const1, %1.num & 0xff}
mov a, %2.1
sbi {const1, %1.num >> 8}
SIGN_ADJUST
jp {label, $1}
with hl_or_de const2 STACK
uses areg
@ -1899,6 +1909,7 @@ pat bge
sub %1.2
mvi a, {const1, %2.num >> 8}
sbb %1.1
SIGN_ADJUST
jp {label, $1}
with hl_or_de hl_or_de STACK
uses areg
@ -1907,6 +1918,7 @@ pat bge
sub %1.2
mov a,%2.1
sbb %1.1
SIGN_ADJUST
jp {label,$1}
pat ble

3
mach/i80/top/table
View file

@ -1,5 +1,5 @@
/* 68020 desciptor table for ACK target optimizer */
/* 8080 desciptor table for ACK target optimizer */
MAXOP 2;
@ -14,5 +14,6 @@ xchg : inx h : xchg -> inx d ;
xchg : inx d : xchg -> inx h ;
cpi 0 -> ora a ;
call X : ret -> jmp X ;
%%;