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3T saving for each manual 16-bit addition

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This commit is contained in:
Simon Owen 2012-02-20 21:44:32 +00:00
parent 9688edc5b2
commit 9354ab4ef2
1 changed files with 8 additions and 8 deletions
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16
opimpl.inc
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@ -283,8 +283,8 @@ i_ora_iy: ld a,(de) ; ORA ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ld a,b ; A
or (hl) ; A|x
@ -765,8 +765,8 @@ i_and_iy: ld a,(de) ; AND ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ld a,b ; A
and (hl) ; A&x
@ -1218,8 +1218,8 @@ i_eor_iy: ld a,(de) ; EOR ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ld a,b ; A
xor (hl) ; A^x
@ -1655,8 +1655,8 @@ i_adc_iy: ld a,(de) ; ADC ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
jp i_adc
op_71_len: equ $-op_71
@ -2075,8 +2075,8 @@ i_sta_iy: ld a,(de) ; STA ($nn),Y
inc l
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ld (hl),b ; store A
jp write_loop
@ -2482,8 +2482,8 @@ i_lda_iy: ld a,(de) ; LDA ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ld b,(hl) ; set A
ld c,b ; set N Z
@ -2927,8 +2927,8 @@ i_cmp_iy: ld a,(de) ; CMP ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
ex af,af' ; carry
ld a,b ; A
@ -3365,8 +3365,8 @@ i_sbc_iy: ld a,(de) ; SBC ($nn),Y
inc l ; (may wrap in zero page)
ld h,(hl)
ld l,a
ld a,0
adc a,h
sub l
ld h,a
jp i_sbc
op_f1_len: equ $-op_f1