mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 23:32:09 +00:00
d9d0a80752
The extend instruction is for loading narrower data types into wider data types, eg, single element into 2, 3, or 4 element types, with a small set of extension schemes: 0, 1, -1, copy (for 1->any and 2 -> 4). Possibly most importantly, it works with unaligned data. Progress towards #30
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
print("""// encoding is teemmm
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// t = 0: 32-bit, t = 1: 64-bit
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// e = 00: 0
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// e = 01: 1.0
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// e = 10: copy (1-n, 2-4, otherwise 0)
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// e = 11: -1.0
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// mmm = 000: 1 -> 2
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// mmm = 001: 1 -> 3
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// mmm = 010: 1 -> 4
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// mmm = 011: 2 -> 3
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// mmm = 100: 2 -> 4
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// mmm = 101: 3 -> 4
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// mmm = 110: reserved
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// mmm = 111: reserved
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""")
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types = [
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["ivec2", "ivec3", "ivec4", "ivec3", "ivec4", "ivec4"],
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["lvec2", "lvec3", "lvec4", "lvec3", "lvec4", "lvec4"],
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]
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src_types = [
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["int", "int", "int", "ivec2", "ivec2", "ivec3"],
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["long", "long", "long", "lvec2", "lvec2", "lvec3"],
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]
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extend = [
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["0", "INT32_C(0x3f800000)", "0", "INT32_C(0xbf800000)"],
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["0", "INT64_C(0x3ff0000000000000)", "0", "INT64_C(0xbff0000000000000)"],
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]
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def case_str(type, ext, mode):
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case = (type << 5) | (ext << 3) | (mode)
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return f"case {case:03o}:"
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def dst_str(type, ext, mode):
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return f"OPC({types[type][mode]})"
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def cast_str(type, ext, mode):
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return f"(pr_{types[type][mode]}_t)"
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def init_str(type, ext, mode):
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ext_str = extend[type][ext]
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src = f"OPA({src_types[type][mode]})"
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if mode == 0:
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if ext == 2:
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ext_str = src
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return f"{src}, {ext_str}"
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elif mode == 1:
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if ext == 2:
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ext_str = src
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return f"{src}, {ext_str}, {ext_str}"
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elif mode == 2:
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if ext == 2:
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ext_str = src
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return f"{src}, {ext_str}, {ext_str}, {ext_str}"
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elif mode == 3:
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return f"{src}[0], {src}[1], {ext_str}"
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elif mode == 4:
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if ext == 2:
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return f"{src}[0], {src}[1], {src}[0], {src}[1]"
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else:
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return f"{src}[0], {src}[1], {ext_str}, {ext_str}"
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elif mode == 5:
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return f"{src}[0], {src}[1], {src}[2], {ext_str}"
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for type in range(2):
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for ext in range(4):
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for mode in range(6): # 6, 7 are reserved
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case = case_str(type, ext, mode)
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dst = dst_str(type, ext, mode)
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cast = cast_str(type, ext, mode)
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init = init_str(type, ext, mode)
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if mode in [1, 3]:
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print(f"{case} VectorSet({init}, {dst}); break;");
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else:
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print(f"{case} {dst} = {cast} {{ {init} }}; break;");
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