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changed lwi to li to match other assemblers

master
bx 2021-09-02 20:56:48 +01:00
parent 2810109764
commit eb67ac6c5e
2 changed files with 19 additions and 15 deletions
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5
assembler.rb
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@ -198,8 +198,9 @@ class Assembler
word 0x00000000 word 0x00000000
end end
# load word immediate # load immediate
def lwi(val, dest) # TODO: check if we need to use 1 or 2 ops and output that
def li(val, dest)
lui val >> 16, dest lui val >> 16, dest
ori dest, val, dest ori dest, val, dest
end end

29
main.asm.rb
View File

@ -4,6 +4,9 @@
$gp0 = 0x1F801810 $gp0 = 0x1F801810
$gp1 = 0x1F801814 $gp1 = 0x1F801814
# TODO:
# FIND OUT WHAT WE HAVE TO DO TO REGISTER A VSYNC INTERRUPT
jmp l_start jmp l_start
nop nop
@ -17,10 +20,10 @@ label :printf
label :draw_line label :draw_line
# todo: draw line function, take args in a0 - a3 # todo: draw line function, take args in a0 - a3
# tood: implement shift left so we can use that # tood: implement shift left so we can use that to combine x and y co-ords
lwi $gp0, t0 li $gp0, t0
lwi 0x40_ffffff, t1 # monochrome line, color ffffff li 0x40_ffffff, t1 # monochrome line, color ffffff
sw t1, 0, t0 sw t1, 0, t0
# lwi st, t1 # line vert 1 # lwi st, t1 # line vert 1
@ -33,27 +36,27 @@ label :start
nop ; nop ; nop ; nop nop ; nop ; nop ; nop
# THIS IS NEEDED # THIS IS NEEDED
lwi $gp1, t0 li $gp1, t0
lwi 0x03_00_00_00, t1 # display enable li 0x03_00_00_00, t1 # display enable
sw t1, 0, t0 sw t1, 0, t0
lwi $gp0, t0 li $gp0, t0
lwi 0xe1_000000 + 0b0_0_0_1_0_01_00_0_0000, t1 li 0xe1_000000 + 0b0_0_0_1_0_01_00_0_0000, t1
sw t1, 0, t0 sw t1, 0, t0
# THIS IS NEEDED # THIS IS NEEDED
lwi 0xe4_000000 + (640) + (480 << 10), t1 # Drawing Area bottom right li 0xe4_000000 + (640) + (480 << 10), t1 # Drawing Area bottom right
sw t1, 0, t0 sw t1, 0, t0
def line(st, en) def line(st, en)
lwi 0x40_ffffff, t1 # monochrome line, color ffffff li 0x40_ffffff, t1 # monochrome line, color ffffff
sw t1, 0, t0 sw t1, 0, t0
lwi st, t1 # line vert 1 li st, t1 # line vert 1
sw t1, 0, t0 sw t1, 0, t0
lwi en, t1 # line vert 2 li en, t1 # line vert 2
sw t1, 0, t0 sw t1, 0, t0
end end
@ -61,13 +64,13 @@ label :start
line 0x0030_0030, 0x0060_0000 line 0x0030_0030, 0x0060_0000
line 0x0060_000a, 0x00f0_0060 line 0x0060_000a, 0x00f0_0060
lwi l_hello_world, a0 li l_hello_world, a0
jal l_printf jal l_printf
addiu sp, -16, sp # delay slot addiu sp, -16, sp # delay slot
addiu sp, 16, sp addiu sp, 16, sp
label :end_loop label :end_loop
lwi l_end_loop, t9 li l_end_loop, t9
jr t9 jr t9
nop nop