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kickc/src/test/ref/printf-speed.asm

769 lines
18 KiB
NASM

// Tests the speed of printf()
/// @file
/// Functions for performing input and output.
// Commodore 64 PRG executable file
.file [name="printf-speed.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(__start)
.const LIGHT_BLUE = $e
.const OFFSET_STRUCT_PRINTF_BUFFER_NUMBER_DIGITS = 1
.const OFFSET_STRUCT_TIME_OF_DAY_SEC = 1
.const OFFSET_STRUCT_TIME_OF_DAY_MIN = 2
.const OFFSET_STRUCT_TIME_OF_DAY_HOURS = 3
.const OFFSET_STRUCT_MOS6526_CIA_TIMER_A_CONTROL = $e
.const OFFSET_STRUCT_MOS6526_CIA_TIMER_B_CONTROL = $f
.const OFFSET_STRUCT_MOS6526_CIA_TOD_HOURS = $b
.const OFFSET_STRUCT_MOS6526_CIA_TOD_MIN = $a
.const OFFSET_STRUCT_MOS6526_CIA_TOD_SEC = 9
.const OFFSET_STRUCT_MOS6526_CIA_TOD_10THS = 8
.const SIZEOF_STRUCT_PRINTF_BUFFER_NUMBER = $c
/// Color Ram
.label COLORRAM = $d800
/// Default address of screen character matrix
.label DEFAULT_SCREEN = $400
/// The CIA#1: keyboard matrix, joystick #1/#2
.label CIA1 = $dc00
// The number of bytes on the screen
// The current cursor x-position
.label conio_cursor_x = 8
// The current cursor y-position
.label conio_cursor_y = 9
// The current text cursor line start
.label conio_line_text = $a
// The current color cursor line start
.label conio_line_color = $c
.segment Code
__start: {
// __ma char conio_cursor_x = 0
lda #0
sta.z conio_cursor_x
// __ma char conio_cursor_y = 0
sta.z conio_cursor_y
// __ma char *conio_line_text = CONIO_SCREEN_TEXT
lda #<DEFAULT_SCREEN
sta.z conio_line_text
lda #>DEFAULT_SCREEN
sta.z conio_line_text+1
// __ma char *conio_line_color = CONIO_SCREEN_COLORS
lda #<COLORRAM
sta.z conio_line_color
lda #>COLORRAM
sta.z conio_line_color+1
// #pragma constructor_for(conio_c64_init, cputc, clrscr, cscroll)
jsr conio_c64_init
jsr main
rts
}
// Set initial cursor position
conio_c64_init: {
// Position cursor at current line
.label BASIC_CURSOR_LINE = $d6
// char line = *BASIC_CURSOR_LINE
ldx BASIC_CURSOR_LINE
// if(line>=CONIO_HEIGHT)
cpx #$19
bcc __b1
ldx #$19-1
__b1:
// gotoxy(0, line)
jsr gotoxy
// }
rts
}
main: {
.label i = 2
// tod_init(TOD_ZERO)
lda TOD_ZERO
sta.z tod_init.tod_TENTHS
lda TOD_ZERO+OFFSET_STRUCT_TIME_OF_DAY_SEC
sta.z tod_init.tod_SEC
ldx TOD_ZERO+OFFSET_STRUCT_TIME_OF_DAY_MIN
ldy TOD_ZERO+OFFSET_STRUCT_TIME_OF_DAY_HOURS
jsr tod_init
lda #<0
sta.z i
sta.z i+1
__b1:
// for(unsigned int i=0;i<10000;i++)
lda.z i+1
cmp #>$2710
bcc __b2
bne !+
lda.z i
cmp #<$2710
bcc __b2
!:
// gotoxy(0, 22)
ldx #$16
jsr gotoxy
// tod_read()
jsr tod_read
sta.z tod_read.return_MIN
lda.z tod_read.return_HOURS
// tod_str(tod_read())
sty.z tod_str.tod_TENTHS
stx.z tod_str.tod_SEC
ldy.z tod_read.return_MIN
tax
jsr tod_str
// printf("time: %s",tod_str(tod_read()))
lda #<s
sta.z cputs.s
lda #>s
sta.z cputs.s+1
jsr cputs
// printf("time: %s",tod_str(tod_read()))
jsr printf_string
// }
rts
__b2:
// i&0x7f
lda #$7f
and.z i
// if((i&0x7f) == 0)
cmp #0
bne __b4
// gotoxy(0,16)
ldx #$10
jsr gotoxy
// printf("%u",i)
jsr printf_uint
// gotoxy(0,0)
ldx #0
jsr gotoxy
__b4:
// printf("qwe ")
lda #<s1
sta.z cputs.s
lda #>s1
sta.z cputs.s+1
jsr cputs
// for(unsigned int i=0;i<10000;i++)
inc.z i
bne !+
inc.z i+1
!:
jmp __b1
.segment Data
s: .text "time: "
.byte 0
s1: .text "qwe "
.byte 0
}
.segment Code
// Set the cursor to the specified position
// gotoxy(byte register(X) y)
gotoxy: {
.label __5 = $14
.label __6 = $10
.label __7 = $10
.label line_offset = $10
.label __8 = $12
.label __9 = $10
// if(y>CONIO_HEIGHT)
cpx #$19+1
bcc __b2
ldx #0
__b2:
// conio_cursor_x = x
lda #0
sta.z conio_cursor_x
// conio_cursor_y = y
stx.z conio_cursor_y
// (unsigned int)y*CONIO_WIDTH
txa
sta.z __7
lda #0
sta.z __7+1
// unsigned int line_offset = (unsigned int)y*CONIO_WIDTH
lda.z __7
asl
sta.z __8
lda.z __7+1
rol
sta.z __8+1
asl.z __8
rol.z __8+1
clc
lda.z __9
adc.z __8
sta.z __9
lda.z __9+1
adc.z __8+1
sta.z __9+1
asl.z line_offset
rol.z line_offset+1
asl.z line_offset
rol.z line_offset+1
asl.z line_offset
rol.z line_offset+1
// CONIO_SCREEN_TEXT + line_offset
lda.z line_offset
clc
adc #<DEFAULT_SCREEN
sta.z __5
lda.z line_offset+1
adc #>DEFAULT_SCREEN
sta.z __5+1
// conio_line_text = CONIO_SCREEN_TEXT + line_offset
lda.z __5
sta.z conio_line_text
lda.z __5+1
sta.z conio_line_text+1
// CONIO_SCREEN_COLORS + line_offset
lda.z __6
clc
adc #<COLORRAM
sta.z __6
lda.z __6+1
adc #>COLORRAM
sta.z __6+1
// conio_line_color = CONIO_SCREEN_COLORS + line_offset
lda.z __6
sta.z conio_line_color
lda.z __6+1
sta.z conio_line_color+1
// }
rts
}
// Initialize time-of-day clock
// This uses the MOS6526 CIA#1
// tod_init(byte zp($f) tod_TENTHS, byte zp($e) tod_SEC, byte register(X) tod_MIN, byte register(Y) tod_HOURS)
tod_init: {
.label tod_TENTHS = $f
.label tod_SEC = $e
// CIA1->TIMER_A_CONTROL |= 0x80
// Set 50hz (this assumes PAL!) (bit7=1)
lda #$80
ora CIA1+OFFSET_STRUCT_MOS6526_CIA_TIMER_A_CONTROL
sta CIA1+OFFSET_STRUCT_MOS6526_CIA_TIMER_A_CONTROL
// CIA1->TIMER_B_CONTROL &= 0x7f
// Writing TOD clock (bit7=0)
lda #$7f
and CIA1+OFFSET_STRUCT_MOS6526_CIA_TIMER_B_CONTROL
sta CIA1+OFFSET_STRUCT_MOS6526_CIA_TIMER_B_CONTROL
// CIA1->TOD_HOURS = tod.HOURS
// Reset TOD clock
// Writing sequence is important. TOD stops when hours is written and starts when 10ths is written.
sty CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_HOURS
// CIA1->TOD_MIN = tod.MIN
stx CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_MIN
// CIA1->TOD_SEC = tod.SEC
lda.z tod_SEC
sta CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_SEC
// CIA1->TOD_10THS = tod.TENTHS
lda.z tod_TENTHS
sta CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_10THS
// }
rts
}
// Read time of day
tod_read: {
.label return_HOURS = $16
.label return_MIN = $e
// char hours = CIA1->TOD_HOURS
// Reading sequence is important. TOD latches on reading hours until 10ths is read.
lda CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_HOURS
sta.z return_HOURS
// char mins = CIA1->TOD_MIN
lda CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_MIN
// char secs = CIA1->TOD_SEC
ldx CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_SEC
// char tenths = CIA1->TOD_10THS
ldy CIA1+OFFSET_STRUCT_MOS6526_CIA_TOD_10THS
// }
rts
}
// Convert time of day to a human-readable string "hh:mm:ss:10"
// tod_str(byte zp($16) tod_TENTHS, byte zp($f) tod_SEC, byte register(Y) tod_MIN, byte register(X) tod_HOURS)
tod_str: {
.label tod_TENTHS = $16
.label tod_SEC = $f
// tod.HOURS>>4
txa
lsr
lsr
lsr
lsr
// '0'+(tod.HOURS>>4)
clc
adc #'0'
// tod_buffer[0] = '0'+(tod.HOURS>>4)
sta tod_buffer
// tod.HOURS&0x0f
txa
and #$f
// '0'+(tod.HOURS&0x0f)
clc
adc #'0'
// tod_buffer[1] = '0'+(tod.HOURS&0x0f)
sta tod_buffer+1
// tod.MIN>>4
tya
lsr
lsr
lsr
lsr
// '0'+(tod.MIN>>4)
clc
adc #'0'
// tod_buffer[3] = '0'+(tod.MIN>>4)
sta tod_buffer+3
// tod.MIN&0x0f
tya
and #$f
// '0'+(tod.MIN&0x0f)
clc
adc #'0'
// tod_buffer[4] = '0'+(tod.MIN&0x0f)
sta tod_buffer+4
// tod.SEC>>4
lda.z tod_SEC
lsr
lsr
lsr
lsr
// '0'+(tod.SEC>>4)
clc
adc #'0'
// tod_buffer[6] = '0'+(tod.SEC>>4)
sta tod_buffer+6
// tod.SEC&0x0f
lda #$f
and.z tod_SEC
// '0'+(tod.SEC&0x0f)
clc
adc #'0'
// tod_buffer[7] = '0'+(tod.SEC&0x0f)
sta tod_buffer+7
// tod.TENTHS>>4
lda.z tod_TENTHS
lsr
lsr
lsr
lsr
// '0'+(tod.TENTHS>>4)
clc
adc #'0'
// tod_buffer[9] = '0'+(tod.TENTHS>>4)
sta tod_buffer+9
// tod.TENTHS&0x0f
lda #$f
and.z tod_TENTHS
// '0'+(tod.TENTHS&0x0f)
clc
adc #'0'
// tod_buffer[10] = '0'+(tod.TENTHS&0x0f)
sta tod_buffer+$a
// }
rts
}
// Output a NUL-terminated string at the current cursor position
// cputs(const byte* zp(4) s)
cputs: {
.label s = 4
__b1:
// while(c=*s++)
ldy #0
lda (s),y
inc.z s
bne !+
inc.z s+1
!:
cmp #0
bne __b2
// }
rts
__b2:
// cputc(c)
jsr cputc
jmp __b1
}
// Print a string value using a specific format
// Handles justification and min length
printf_string: {
// cputs(str)
lda #<tod_buffer
sta.z cputs.s
lda #>tod_buffer
sta.z cputs.s+1
jsr cputs
// }
rts
}
// Print an unsigned int using a specific format
// printf_uint(word zp(2) uvalue)
printf_uint: {
.label uvalue = 2
// printf_buffer.sign = format.sign_always?'+':0
// Handle any sign
lda #0
sta printf_buffer
// utoa(uvalue, printf_buffer.digits, format.radix)
lda.z uvalue
sta.z utoa.value
lda.z uvalue+1
sta.z utoa.value+1
// Format number into buffer
jsr utoa
// printf_number_buffer(printf_buffer, format)
lda printf_buffer
// Print using format
jsr printf_number_buffer
// }
rts
}
// Output one character at the current cursor position
// Moves the cursor forward. Scrolls the entire screen if needed
// cputc(byte register(A) c)
cputc: {
// if(c=='\n')
cmp #'\n'
beq __b1
// conio_line_text[conio_cursor_x] = c
ldy.z conio_cursor_x
sta (conio_line_text),y
// conio_line_color[conio_cursor_x] = conio_textcolor
lda #LIGHT_BLUE
sta (conio_line_color),y
// if(++conio_cursor_x==CONIO_WIDTH)
inc.z conio_cursor_x
lda #$28
cmp.z conio_cursor_x
bne __breturn
// cputln()
jsr cputln
__breturn:
// }
rts
__b1:
// cputln()
jsr cputln
rts
}
// Converts unsigned number value to a string representing it in RADIX format.
// If the leading digits are zero they are not included in the string.
// - value : The number to be converted to RADIX
// - buffer : receives the string representing the number and zero-termination.
// - radix : The radix to convert the number to (from the enum RADIX)
// utoa(word zp(4) value, byte* zp($19) buffer)
utoa: {
.const max_digits = 5
.label digit_value = $17
.label buffer = $19
.label digit = $f
.label value = 4
lda #<printf_buffer+OFFSET_STRUCT_PRINTF_BUFFER_NUMBER_DIGITS
sta.z buffer
lda #>printf_buffer+OFFSET_STRUCT_PRINTF_BUFFER_NUMBER_DIGITS
sta.z buffer+1
ldx #0
txa
sta.z digit
__b1:
// for( char digit=0; digit<max_digits-1; digit++ )
lda.z digit
cmp #max_digits-1
bcc __b2
// *buffer++ = DIGITS[(char)value]
ldx.z value
lda DIGITS,x
ldy #0
sta (buffer),y
// *buffer++ = DIGITS[(char)value];
inc.z buffer
bne !+
inc.z buffer+1
!:
// *buffer = 0
lda #0
tay
sta (buffer),y
// }
rts
__b2:
// unsigned int digit_value = digit_values[digit]
lda.z digit
asl
tay
lda RADIX_DECIMAL_VALUES,y
sta.z digit_value
lda RADIX_DECIMAL_VALUES+1,y
sta.z digit_value+1
// if (started || value >= digit_value)
cpx #0
bne __b5
cmp.z value+1
bne !+
lda.z digit_value
cmp.z value
beq __b5
!:
bcc __b5
__b4:
// for( char digit=0; digit<max_digits-1; digit++ )
inc.z digit
jmp __b1
__b5:
// utoa_append(buffer++, value, digit_value)
jsr utoa_append
// utoa_append(buffer++, value, digit_value)
// value = utoa_append(buffer++, value, digit_value)
// value = utoa_append(buffer++, value, digit_value);
inc.z buffer
bne !+
inc.z buffer+1
!:
ldx #1
jmp __b4
}
// Print the contents of the number buffer using a specific format.
// This handles minimum length, zero-filling, and left/right justification from the format
// printf_number_buffer(byte register(A) buffer_sign)
printf_number_buffer: {
.label buffer_digits = printf_buffer+OFFSET_STRUCT_PRINTF_BUFFER_NUMBER_DIGITS
// if(buffer.sign)
cmp #0
beq __b2
// cputc(buffer.sign)
jsr cputc
__b2:
// cputs(buffer.digits)
lda #<buffer_digits
sta.z cputs.s
lda #>buffer_digits
sta.z cputs.s+1
jsr cputs
// }
rts
}
// Print a newline
cputln: {
// conio_line_text += CONIO_WIDTH
lda #$28
clc
adc.z conio_line_text
sta.z conio_line_text
bcc !+
inc.z conio_line_text+1
!:
// conio_line_color += CONIO_WIDTH
lda #$28
clc
adc.z conio_line_color
sta.z conio_line_color
bcc !+
inc.z conio_line_color+1
!:
// conio_cursor_x = 0
lda #0
sta.z conio_cursor_x
// conio_cursor_y++;
inc.z conio_cursor_y
// cscroll()
jsr cscroll
// }
rts
}
// Used to convert a single digit of an unsigned number value to a string representation
// Counts a single digit up from '0' as long as the value is larger than sub.
// Each time the digit is increased sub is subtracted from value.
// - buffer : pointer to the char that receives the digit
// - value : The value where the digit will be derived from
// - sub : the value of a '1' in the digit. Subtracted continually while the digit is increased.
// (For decimal the subs used are 10000, 1000, 100, 10, 1)
// returns : the value reduced by sub * digit so that it is less than sub.
// utoa_append(byte* zp($19) buffer, word zp(4) value, word zp($17) sub)
utoa_append: {
.label buffer = $19
.label value = 4
.label sub = $17
.label return = 4
ldx #0
__b1:
// while (value >= sub)
lda.z sub+1
cmp.z value+1
bne !+
lda.z sub
cmp.z value
beq __b2
!:
bcc __b2
// *buffer = DIGITS[digit]
lda DIGITS,x
ldy #0
sta (buffer),y
// }
rts
__b2:
// digit++;
inx
// value -= sub
lda.z value
sec
sbc.z sub
sta.z value
lda.z value+1
sbc.z sub+1
sta.z value+1
jmp __b1
}
// Scroll the entire screen if the cursor is beyond the last line
cscroll: {
// if(conio_cursor_y==CONIO_HEIGHT)
lda #$19
cmp.z conio_cursor_y
bne __breturn
// memcpy(CONIO_SCREEN_TEXT, CONIO_SCREEN_TEXT+CONIO_WIDTH, CONIO_BYTES-CONIO_WIDTH)
lda #<DEFAULT_SCREEN
sta.z memcpy.destination
lda #>DEFAULT_SCREEN
sta.z memcpy.destination+1
lda #<DEFAULT_SCREEN+$28
sta.z memcpy.source
lda #>DEFAULT_SCREEN+$28
sta.z memcpy.source+1
jsr memcpy
// memcpy(CONIO_SCREEN_COLORS, CONIO_SCREEN_COLORS+CONIO_WIDTH, CONIO_BYTES-CONIO_WIDTH)
lda #<COLORRAM
sta.z memcpy.destination
lda #>COLORRAM
sta.z memcpy.destination+1
lda #<COLORRAM+$28
sta.z memcpy.source
lda #>COLORRAM+$28
sta.z memcpy.source+1
jsr memcpy
// memset(CONIO_SCREEN_TEXT+CONIO_BYTES-CONIO_WIDTH, ' ', CONIO_WIDTH)
ldx #' '
lda #<DEFAULT_SCREEN+$19*$28-$28
sta.z memset.str
lda #>DEFAULT_SCREEN+$19*$28-$28
sta.z memset.str+1
jsr memset
// memset(CONIO_SCREEN_COLORS+CONIO_BYTES-CONIO_WIDTH, conio_textcolor, CONIO_WIDTH)
ldx #LIGHT_BLUE
lda #<COLORRAM+$19*$28-$28
sta.z memset.str
lda #>COLORRAM+$19*$28-$28
sta.z memset.str+1
jsr memset
// conio_line_text -= CONIO_WIDTH
sec
lda.z conio_line_text
sbc #$28
sta.z conio_line_text
lda.z conio_line_text+1
sbc #0
sta.z conio_line_text+1
// conio_line_color -= CONIO_WIDTH
sec
lda.z conio_line_color
sbc #$28
sta.z conio_line_color
lda.z conio_line_color+1
sbc #0
sta.z conio_line_color+1
// conio_cursor_y--;
dec.z conio_cursor_y
__breturn:
// }
rts
}
// Copy block of memory (forwards)
// Copies the values of num bytes from the location pointed to by source directly to the memory block pointed to by destination.
// memcpy(void* zp(6) destination, void* zp($19) source)
memcpy: {
.label src_end = $17
.label dst = 6
.label src = $19
.label source = $19
.label destination = 6
// char* src_end = (char*)source+num
lda.z source
clc
adc #<$19*$28-$28
sta.z src_end
lda.z source+1
adc #>$19*$28-$28
sta.z src_end+1
__b1:
// while(src!=src_end)
lda.z src+1
cmp.z src_end+1
bne __b2
lda.z src
cmp.z src_end
bne __b2
// }
rts
__b2:
// *dst++ = *src++
ldy #0
lda (src),y
sta (dst),y
// *dst++ = *src++;
inc.z dst
bne !+
inc.z dst+1
!:
inc.z src
bne !+
inc.z src+1
!:
jmp __b1
}
// Copies the character c (an unsigned char) to the first num characters of the object pointed to by the argument str.
// memset(void* zp(6) str, byte register(X) c)
memset: {
.label end = $19
.label dst = 6
.label str = 6
// char* end = (char*)str + num
lda #$28
clc
adc.z str
sta.z end
lda #0
adc.z str+1
sta.z end+1
__b2:
// for(char* dst = str; dst!=end; dst++)
lda.z dst+1
cmp.z end+1
bne __b3
lda.z dst
cmp.z end
bne __b3
// }
rts
__b3:
// *dst = c
txa
ldy #0
sta (dst),y
// for(char* dst = str; dst!=end; dst++)
inc.z dst
bne !+
inc.z dst+1
!:
jmp __b2
}
.segment Data
// The digits used for numbers
DIGITS: .text "0123456789abcdef"
// Values of decimal digits
RADIX_DECIMAL_VALUES: .word $2710, $3e8, $64, $a
// The buffer used by tod_str()
tod_buffer: .text "00:00:00:00"
.byte 0
// Buffer used for stringified number being printed
printf_buffer: .fill SIZEOF_STRUCT_PRINTF_BUFFER_NUMBER, 0
/// Time of Day 00:00:00:00
TOD_ZERO: .byte 0, 0, 0, 0