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2006-03-05
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4KB
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188 lines
!
! PCAT Compiler Version 1.0
!
.global .div
.global .rem
!
! Standard data fields
!
.data
.align 8
temp: .double 0
.text
strNL: .asciz "\n"
strInt: .asciz "%d"
strFlt: .asciz "%g"
strTrue: .asciz "TRUE"
strFalse: .asciz "FALSE"
message1: .asciz "Execution Error: Allocation failed!\n"
message2: .asciz "Execution Error: Pointer is NIL!\n"
message3: .asciz "Execution Error: Read statement failed!\n"
message4: .asciz "Execution Error: Array index is out of bounds!\n"
message5: .asciz "Execution Error: Count is not positive in array constructor!\n"
.align 8
!
! runtimeError1-5
!
! Branch to one of these labels to print an error message and abort.
!
runtimeError1:
set message1,%o0
call printf
nop
call exit
mov 1,%o0
runtimeError2:
set message2,%o0
call printf
nop
call exit
mov 1,%o0
runtimeError3:
set message3,%o0
call printf
nop
call exit
mov 1,%o0
runtimeError4:
set message4,%o0
call printf
nop
call exit
mov 1,%o0
runtimeError5:
set message5,%o0
call printf
nop
call exit
mov 1,%o0
! writeFlt
!
! This routine is passed a single precision floating number in %f0.
! It prints it by calling printf. It uses registers %f0, %f1.
!
writeFlt:
save %sp,-128,%sp
fstod %f0,%f0
set temp,%l0
std %f0,[%l0]
ldd [%l0],%o0
mov %o1,%o2
mov %o0,%o1
set strFlt,%o0
call printf
nop
ret
restore
! writeBool
!
! This routine is passed an integer in %i0/o0. It prints "FALSE" if this
! integer is 0 and "TRUE" otherwise.
!
writeBool:
save %sp,-128,%sp
cmp %i0,%g0
be printFalse
nop
set strTrue,%o0
ba printEnd
nop
printFalse:
set strFalse,%o0
printEnd:
call printf
nop
ret
restore
!
! Additional Fields
!
.data
display0: .word 0
.text
float2: .single 0r0.0
float1: .single 0r0.0
str2: .asciz "Should print -321..."
str1: .asciz "Should print 123..."
.align 8
! MAIN...
! mainEntry
.global main
main: save %sp,-120,%sp
set display0,%o0
st %fp,[%o0]
! VAR INITIALIZATION...
! i := 123
set 123,%o0
st %o0,[%fp+-4]
! VAR INITIALIZATION...
! t1 := - 321 (integer)
set 321,%o0
neg %o0,%o1
st %o1,[%fp+-20]
! j := t1
ld [%fp+-20],%o0
st %o0,[%fp+-8]
! VAR INITIALIZATION...
! x := 0.0
set float1,%o0
ld [%o0],%o0
st %o0,[%fp+-12]
! VAR INITIALIZATION...
! y := 0.0
set float2,%o0
ld [%o0],%o0
st %o0,[%fp+-16]
! ASSIGNMENT STMT...
! t2 := intToFloat (i)
ld [%fp+-4],%o0
set temp,%o1
st %o0,[%o1]
ld [%o1],%f0
fitos %f0,%f0
st %f0,[%fp+-24]
! x := t2
ld [%fp+-24],%o0
st %o0,[%fp+-12]
! WRITE STMT...
! writeString str1
sethi %hi(str1),%o0
call printf
or %o0,%lo(str1),%o0
! writeFloat x
ld [%fp+-12],%f0
call writeFlt
nop
! writeNewline
sethi %hi(strNL),%o0
call printf
or %o0,%lo(strNL),%o0
! ASSIGNMENT STMT...
! t3 := intToFloat (j)
ld [%fp+-8],%o0
set temp,%o1
st %o0,[%o1]
ld [%o1],%f0
fitos %f0,%f0
st %f0,[%fp+-28]
! y := t3
ld [%fp+-28],%o0
st %o0,[%fp+-16]
! WRITE STMT...
! writeString str2
sethi %hi(str2),%o0
call printf
or %o0,%lo(str2),%o0
! writeFloat y
ld [%fp+-16],%f0
call writeFlt
nop
! writeNewline
sethi %hi(strNL),%o0
call printf
or %o0,%lo(strNL),%o0
! MAIN EXIT...
! mainExit
ret
restore