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Add i32 sign extension

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This commit is contained in:
Rerumu 2022-06-27 19:57:31 -04:00
parent 2363811773
commit b8362d9e66
1 changed files with 20 additions and 0 deletions
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20
codegen/luau/runtime/runtime.lua
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@ -385,6 +385,26 @@ do
trunc.f64 = trunc.f32
function extend.i32_i8(num)
num = bit_and(num, 0xFF)
if num >= 0x80 then
return to_u32(num - 0x100)
else
return num
end
end
function extend.i32_i16(num)
num = bit_and(num, 0xFFFF)
if num >= 0x8000 then
return to_u32(num - 0x10000)
else
return num
end
end
function extend.i64_i32(num)
if num > MAX_SIGNED then
local temp = num_from_u32(-num + BIT_SET_32, 0)