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Apply faster popptr1 to functions and/or use register instead of stack to save accu.

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This commit is contained in:
IrgendwerA8 2018-05-21 18:18:01 +02:00
parent 81b3c16c7e
commit d7da827be8
6 changed files with 30 additions and 30 deletions
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24
libsrc/runtime/mul.s
View File

@ -6,8 +6,8 @@
.export tosumulax, tosmulax
.import mul8x16, mul8x16a ; in mul8.s
.import popsreg
.importzp sreg, tmp1, ptr4
.import popptr1
.importzp tmp1, ptr1, ptr4
;---------------------------------------------------------------------------
@ -19,12 +19,12 @@ tosumulax:
txa ; High byte zero
beq @L3 ; Do 8x16 multiplication if high byte zero
stx ptr4+1 ; Save right operand
jsr popsreg ; Get left operand
jsr popptr1 ; Get left operand (Y=0 by popptr1)
; Do ptr4:ptr4+1 * sreg:sreg+1 --> AX
; Do ptr4:ptr4+1 * ptr1:ptr1+1 --> AX
lda #0
ldx sreg+1 ; Get high byte into register for speed
tya ; A = 0
ldx ptr1+1 ; check if lhs is 8 bit only
beq @L4 ; -> we can do 8x16 after swap
sta tmp1
ldy #16 ; Number of bits
@ -34,12 +34,12 @@ tosumulax:
@L0: bcc @L1
clc
adc sreg
pha
txa ; hi byte of left op
adc ptr1
tax
lda ptr1+1 ; hi byte of left op
adc tmp1
sta tmp1
pla
txa
@L1: ror tmp1
ror a
@ -59,9 +59,9 @@ tosumulax:
; If the high byte of rhs is zero, swap the operands and use the 8x16
; routine. On entry, A and X are zero
@L4: ldy sreg ; Save right operand (8 bit)
@L4: ldy ptr1 ; Save right operand (8 bit)
ldx ptr4 ; Copy left 16 bit operand to right
stx sreg
stx ptr1
ldx ptr4+1 ; Don't store, this is done later
sty ptr4 ; Copy low 8 bit of right op to left
ldy #8

20
libsrc/runtime/mul8.s
View File

@ -6,8 +6,8 @@
.export tosumula0, tosmula0
.export mul8x16, mul8x16a
.import popsreg
.importzp sreg, ptr4
.import popptr1
.importzp ptr1, ptr4
;---------------------------------------------------------------------------
@ -16,11 +16,11 @@
tosmula0:
tosumula0:
sta ptr4
mul8x16:jsr popsreg ; Get left operand
mul8x16:jsr popptr1 ; Get left operand (Y=0 by popptr1)
lda #0 ; Clear byte 1
tya ; Clear byte 1
ldy #8 ; Number of bits
ldx sreg+1 ; Get into register for speed
ldx ptr1+1 ; check if lhs is 8 bit only
beq mul8x8 ; Do 8x8 multiplication if high byte zero
mul8x16a:
sta ptr4+1 ; Clear byte 2
@ -29,12 +29,12 @@ mul8x16a:
@L0: bcc @L1
clc
adc sreg
pha
txa ; hi byte of left op
adc ptr1
tax
lda ptr1+1 ; hi byte of left op
adc ptr4+1
sta ptr4+1
pla
txa
@L1: ror ptr4+1
ror a
@ -52,7 +52,7 @@ mul8x8:
lsr ptr4 ; Get first bit into carry
@L0: bcc @L1
clc
adc sreg
adc ptr1
@L1: ror
ror ptr4
dey

4
libsrc/runtime/mulax3.s
View File

@ -15,11 +15,11 @@
rol ptr1+1
clc
adc ptr1
pha
tay
txa
adc ptr1+1
tax
pla
tya
rts
.endproc

4
libsrc/runtime/mulax5.s
View File

@ -17,11 +17,11 @@
rol ptr1+1
clc
adc ptr1
pha
tay
txa
adc ptr1+1
tax
pla
tya
rts
.endproc

4
libsrc/runtime/mulax7.s
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@ -20,12 +20,12 @@
rol ptr1+1 ; * 8
sec
sbc ptr1
pha
tay
txa
eor #$ff
adc ptr1+1 ; * (8 - 1)
tax
pla
tya
rts
.endproc

4
libsrc/runtime/mulax9.s
View File

@ -20,11 +20,11 @@
rol ptr1+1 ; * 8
clc
adc ptr1 ; * (8+1)
pha
tay
txa
adc ptr1+1
tax
pla
tya
rts
.endproc