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7/7 Fixed-Point math

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This commit is contained in:
Edward R. Gonzalez
2026-05-31 20:23:14 -04:00
parent e409fe0b2d
commit 66981351ee
7 changed files with 269 additions and 177 deletions
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code/duffle/gp.h
+41 -45
View File
@@ -37,49 +37,43 @@ enum {
gpio_port_0 = 0x1810,
gpio_port_1 = 0x1814,
gmcd_offset = 24,
gcmd_offset = 24,
gp_Reset = (gcmd_Reset << gmcd_offset),
gp_Reset = (gcmd_Reset << gcmd_offset),
gp_DisplayEnabled = (gcmd_DisplayEnable << gcmd_offset | 0x0),
gp_DisplayDisabled = (gcmd_DisplayEnable << gcmd_offset | 0x1),
gp_DMA_FIFO = 1,
gp_DMA_CPU_to_GPU = 2,
gp_DMA_GPU_to_CPU = 3,
gp_DMA_Request = (gcmd_DMA_Request << gcmd_offset),
gp_HorizontalDisplayRange_3168_608 = (gcmd_HorizontalDisplayRange << gcmd_offset | 0xC60 << 12 | 0x260),
gp_VerticalDiplayRange = (gcmd_VerticalDisplayRange << gcmd_offset),
gp_VerticalDisplayRange_264_24 = (gp_VerticalDiplayRange | 264 << 10 | 24),
gp_VerticalDisplayRange_504_24 = (gp_VerticalDiplayRange | 504 << 10 | 24),
gp_DisplayMode = (gcmd_DisplayMode << gcmd_offset),
gp_Disp_HRes_256 = (0x0),
gp_Disp_HRes_320 = (0x1),
gp_Disp_HRes_512 = (0x2),
gp_Disp_HRes_640 = (0x3),
gp_Disp_VRes_240 = (0x0 << 2),
gp_Disp_VRes_480 = (0x1 << 2),
gp_Disp_Color15 = (0x0 << 4),
gp_Disp_Color24 = (0x1 << 4),
gp_Disp_VInterlace = (0x1 << 5),
gp_DisplayMode_320x240_15bit_NTSC = (gp_DisplayMode | gp_Disp_HRes_320 | gp_Disp_VRes_240 | gp_Disp_Color15),
gp_DisplayMOde_640x480_24bbp_NTSC = (gp_DisplayMode | gp_Disp_HRes_640 | gp_Disp_VRes_480 | gp_Disp_Color24 | gp_Disp_VInterlace),
gp_DrawMode_DrawAllowed = 10,
gp_SetDrawMode_DrawAllowed = (gcmd_SetDrawMode << gcmd_offset | 0x1 << gp_DrawMode_DrawAllowed),
gp_SetArea_TopLeft = (gcmd_SetDrawArea_TopLeft << gcmd_offset),
gp_SetArea_BottomRight = (gcmd_SetDrawArea_BotRight << gcmd_offset),
};
// #define gpio_port0 0x1810
// #define gpio_port1 0x1814
// #define gcmd_offset 24
// #define gp_Reset (gcmd_Reset << gcmd_offset)
#define gp_DisplayEnabled (gcmd_DisplayEnable << gcmd_offset | 0x0)
#define gp_DisplayDisabled (gcmd_DisplayEnable << gcmd_offset | 0x1)
#define gp_DMA_FIFO 1
#define gp_DMA_CPU_to_GPU 2
#define gp_DMA_GPU_to_CPU 3
#define gp_DMA_Request (gcmd_DMA_Request << gcmd_offset)
#define gp_HorizontalDisplayRange_3168_608 (gcmd_HorizontalDisplayRange << gcmd_offset | 0xC60 << 12 | 0x260)
#define gp_VerticalDiplayRange (gcmd_VerticalDisplayRange << gcmd_offset)
#define gp_VerticalDisplayRange_264_24 (gp_VerticalDiplayRange | 264 << 10 | 24)
#define gp_VerticalDisplayRange_504_24 (gp_VerticalDiplayRange | 504 << 10 | 24)
#define gp_DisplayMode (gcmd_DisplayMode << gcmd_offset)
#define gp_Disp_HRes_256 (0x0)
#define gp_Disp_HRes_320 (0x1)
#define gp_Disp_HRes_512 (0x2)
#define gp_Disp_HRes_640 (0x3)
#define gp_Disp_VRes_240 (0x0 << 2)
#define gp_Disp_VRes_480 (0x1 << 2)
#define gp_Disp_Color15 (0x0 << 4)
#define gp_Disp_Color24 (0x1 << 4)
#define gp_Disp_VInterlace (0x1 << 5)
#define gp_DisplayMode_320x240_15bit_NTSC (gp_DisplayMode | gp_Disp_HRes_320 | gp_Disp_VRes_240 | gp_Disp_Color15)
#define gp_DisplayMOde_640x480_24bbp_NTSC (gp_DisplayMode | gp_Disp_HRes_640 | gp_Disp_VRes_480 | gp_Disp_Color24 | gp_Disp_VInterlace)
#define gp_DrawMode_DrawAllowed 10
#define gp_SetDrawMode_DrawAllowed (gcmd_SetDrawMode << gcmd_offset | 0x1 << gp_DrawMode_DrawAllowed)
#define gp_SetArea_TopLeft (gcmd_SetDrawArea_TopLeft << gcmd_offset)
#define gp_SetArea_BottomRight (gcmd_SetDrawArea_BotRight << gcmd_offset)
typedef def_struct(RGB8) { B1 r; B1 g; B1 b; };
#define rgb8(r, g, b) (RGB8){ r, g, b }
@@ -87,10 +81,12 @@ typedef def_struct(RGB8) { B1 r; B1 g; B1 b; };
typedef B1 gp_Pixel16[1];
typedef B1 gp_Pixel24[3];
#define gp_b10_X 0
#define gp_b10_Y 10
#define gp_b16_X 0
#define gp_b16_Y 16
enum {
gp_b10_X = 0,
gp_b10_Y = 10,
gp_b16_X = 0,
gp_b16_Y = 16,
};
typedef def_struct(gp_Vec2) { U2 y; U2 x; };
code/duffle/math.h
+13
View File
@@ -33,6 +33,9 @@ typedef def_struct(Rect_S4) { S4 x; S4 y; S4 width; S4 height; };
typedef def_struct(M3_S2) { A3A3_S2 m; A3_S4 t; };
typedef def_farray(V2_S2, 3);
typedef def_farray(V2_S2, 4);
#define v2s2(x,y) (V2_S2){x,y}
#define v3s2(x,y,z) (V3_S2){x,y,z,0}
#define v3s4(x,y,z) (V3_S4){x,y,z,0}
@@ -45,6 +48,16 @@ FI_ void add_a3s4(A3_S4_R out_a, A3_S4 b) {
(out_a[0])[2] += b[2];
}
FI_ void add_a3s4_fp(A3_S4_R out_a, A3_S4 b) {
(out_a[0])[0] += b[0] >> 1;
(out_a[0])[1] += b[1] >> 1;
(out_a[0])[2] += b[2] >> 1;
}
FI_ void add_v3s4(V3_S4_R out_a, V3_S4 b) {
add_a3s4(pcast(A3_S4_R, out_a), pcast(A3_S4, b));
}
FI_ void add_v3s4_fp(V3_S4_R out_a, V3_S4 b) {
add_a3s4_fp(pcast(A3_S4_R, out_a), pcast(A3_S4, b));
}