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stack parameters gp routine!

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This commit is contained in:
Edward R. Gonzalez
2025-08-03 23:27:02 -04:00
parent 6e7809848b
commit 3d0d02b86e
3 changed files with 45 additions and 26 deletions
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code/graphics_system/dsl.s
+15
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@@ -4,6 +4,7 @@
; Load
load_imm equ li ; dst_reg, immeidate value (signed)
load_uimm equ lui ; dst_reg, immediate value (unsigned)
load_word equ lw ; dst_reg, offset(src_reg0) (offset is immediate value)
; Store
store_word equ sw ; src_reg, dst_address
; Addition
@@ -26,6 +27,8 @@ jump_reg equ jr ; address: register
jump_nreg equ jrl ; subroutine: register
; Registers
; Stack
rstack_ptr equ $sp ; I have this but won't really use the alias..
; Temporaries, may be changed by subroutines
rtmp_0 equ $t0
rtmp_1 equ $t1
@@ -51,3 +54,15 @@ rret_0 equ $v0
rret_1 equ $v1
; Subroutine return address when doing a sub
rret_addr equ $ra
; Data Widths
byte equ 1
word equ 4
.macro stack_alloc, amount
add_ui $sp, - amount
.endmacro
.macro stack_release, amount
add_ui $sp, amount
.endmacro
code/graphics_system/gp.s
+15 -13
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@@ -119,6 +119,8 @@ gp_b10_Y equ 10
gp_b16_X equ 0
gp_b16_Y equ 16
gp_vec2 equ word
.macro gp_push_pak, port, reg_scratch, packet
load_imm reg_scratch, packet
store_word reg_scratch, port
@@ -131,23 +133,23 @@ gp_b16_Y equ 16
.org 0x80010000 + 2000
.func gp_draw_tri_flat ;(
@@io_offset equ rarg_0
@@color equ rarg_1
@@vert_1 equ rarg_2
@@vert_2 equ rarg_3
@@vert_3 equ rstatic_0
gp_draw_tri_flat__sp_size equ (3 * gp_vec2)
@@io_offset equ rarg_0 ; io_offset: word
@@color equ rarg_1 ; color: word
@@verts equ $sp ; verts: [3]gp_vec2
;)
@@cmd equ rtmp_2
load_imm @@cmd, gp_Polygon
or @@cmd, @@cmd, @@color
store_word @@cmd, gpio_port0(@@io_offset)
store_word @@vert_1, gpio_port0(@@io_offset)
store_word @@vert_2, gpio_port0(@@io_offset)
store_word @@vert_3, gpio_port0(@@io_offset)
@@vert_id equ rtmp_1
@@cmd equ rtmp_2
load_imm @@cmd, gp_Polygon
or @@cmd, @@cmd, @@color
store_word @@cmd, gpio_port0(@@io_offset)
load_word @@vert_id, 0 * gp_vec2(@@verts) :: nop :: store_word @@vert_id, gpio_port0(@@io_offset)
load_word @@vert_id, 1 * gp_vec2(@@verts) :: nop :: store_word @@vert_id, gpio_port0(@@io_offset)
load_word @@vert_id, 2 * gp_vec2(@@verts) :: nop :: store_word @@vert_id, gpio_port0(@@io_offset)
jump_reg rret_addr :: nop
.endfunc
.func gp_draw_tri_grouand ;(
.func gp_draw_tri_gouraud ;(
@@io_offset equ rarg_0
@@color equ rarg_1
@@color_2 equ rstatic_1
code/graphics_system/hello_gp_routines.s
+15 -13
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@@ -46,26 +46,28 @@ main:
gcmd_push gp0, rtmp_1, -30 * -1 + Display_HalfHeight << gp_b16_Y | -100 + Display_HalfWidth << gp_b16_X
gcmd_push gp0, rtmp_1, -50 * -1 + Display_HalfHeight << gp_b16_Y | 55 + Display_HalfWidth << gp_b16_X
; Draw a flat-shaded triangle
move rarg_0, reg_io_offset ; arg 1 for gp_draw_tri_flat
load_imm rarg_1, Color_PS_GoldenPoppy
load_imm rarg_2, 100 * -1 + Display_HalfHeight << gp_b16_Y | -100 + Display_HalfWidth << gp_b16_X
load_imm rarg_3, 20 * -1 + Display_HalfHeight << gp_b16_Y | 20 + Display_HalfWidth << gp_b16_X
load_imm rstatic_0, 50 * -1 + Display_HalfHeight << gp_b16_Y | 30 + Display_HalfWidth << gp_b16_X
stack_alloc gp_draw_tri_flat__sp_size ; (used for following call)
move rarg_0, reg_io_offset ; (used for following call)
load_imm rarg_1, Color_PS_GoldenPoppy
load_imm rarg_2, 100 * -1 + Display_HalfHeight << gp_b16_Y | -100 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 0 * gp_vec2($sp)
load_imm rarg_2, 20 * -1 + Display_HalfHeight << gp_b16_Y | 20 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 1 * gp_vec2($sp)
load_imm rarg_2, 50 * -1 + Display_HalfHeight << gp_b16_Y | 30 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 2 * gp_vec2($sp)
jump_nlink gp_draw_tri_flat :: nop
; Bonus traingle
load_imm rarg_1, Color_PS_CadmiumRed
load_imm rarg_2, 50 * -1 + Display_HalfHeight << gp_b16_Y | -100 + Display_HalfWidth << gp_b16_X
load_imm rarg_3, 0 * -1 + Display_HalfHeight << gp_b16_Y | 20 + Display_HalfWidth << gp_b16_X
load_imm rstatic_0, -100 * -1 + Display_HalfHeight << gp_b16_Y | 30 + Display_HalfWidth << gp_b16_X
load_imm rarg_1, Color_PS_CadmiumRed
load_imm rarg_2, 50 * -1 + Display_HalfHeight << gp_b16_Y | -100 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 0 * gp_vec2($sp)
load_imm rarg_2, 0 * -1 + Display_HalfHeight << gp_b16_Y | 20 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 1 * gp_vec2($sp)
load_imm rarg_2, -100 * -1 + Display_HalfHeight << gp_b16_Y | 30 + Display_HalfWidth << gp_b16_X :: sw rarg_2, 2 * gp_vec2($sp)
jump_nlink gp_draw_tri_flat :: nop
stack_release gp_draw_tri_flat__sp_size
; Gourand shaded triangle
load_imm rarg_1, Color_PS_PersianGreen
load_imm rstatic_1, Color_PS_GoldenPoppy
load_imm rstatic_2, Color_PS_CadmiumRed
load_imm rarg_2, -35 * -1 + Display_HalfHeight << gp_b16_Y | 145 + Display_HalfWidth << gp_b16_X
load_imm rarg_3, 0 * -1 + Display_HalfHeight << gp_b16_Y | 50 + Display_HalfWidth << gp_b16_X
load_imm rstatic_0, 40 * -1 + Display_HalfHeight << gp_b16_Y | 60 + Display_HalfWidth << gp_b16_X
jump_nlink gp_draw_tri_grouand :: nop
load_imm rarg_2, -35 * -1 + Display_HalfHeight << gp_b16_Y | 145 + Display_HalfWidth << gp_b16_X
load_imm rarg_3, 0 * -1 + Display_HalfHeight << gp_b16_Y | 50 + Display_HalfWidth << gp_b16_X
load_imm rstatic_0, 40 * -1 + Display_HalfHeight << gp_b16_Y | 60 + Display_HalfWidth << gp_b16_X
jump_nlink gp_draw_tri_gouraud :: nop
idle:
jump idle :: nop