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Improve numeric from_u64 and shifting

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This commit is contained in:
Rerumu 2022-05-17 23:12:45 -04:00
parent 81fbbd455f
commit 2a6033c6f4
1 changed files with 5 additions and 4 deletions
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9
codegen-luau/runtime/numeric.lua
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@ -39,7 +39,7 @@ function Numeric.from_u64(value)
if value < 0 then
return num_negate(from_u64(-value))
else
return from_u32(value % BIT_SET_32, math_floor(value / BIT_SET_32))
return from_u32(bit_and(value), math_floor(value / BIT_SET_32))
end
end
@ -267,10 +267,11 @@ function Numeric.shift_left(lhs, rhs)
local count = into_u64(rhs)
if count < 32 then
local pad = 32 - count
local data_l_1, data_l_2 = into_u32(lhs)
local data_1 = bit_lshift(data_l_1, count)
local data_2 = bit_or(bit_lshift(data_l_2, count), bit_rshift(data_l_1, 32 - count))
local data_2 = bit_replace(bit_rshift(data_l_1, pad), data_l_2, count, pad)
return from_u32(data_1, data_2)
elseif count == 32 then
@ -290,7 +291,7 @@ function Numeric.shift_right_unsigned(lhs, rhs)
if count < 32 then
local data_l_1, data_l_2 = into_u32(lhs)
local data_1 = bit_or(bit_rshift(data_l_1, count), bit_lshift(data_l_2, 32 - count))
local data_1 = bit_replace(bit_rshift(data_l_1, count), data_l_2, 32 - count, count)
local data_2 = bit_rshift(data_l_2, count)
return from_u32(data_1, data_2)
@ -311,7 +312,7 @@ function Numeric.shift_right_signed(lhs, rhs)
if count < 32 then
local data_l_1, data_l_2 = into_u32(lhs)
local data_1 = bit_or(bit_rshift(data_l_1, count), bit_lshift(data_l_2, 32 - count))
local data_1 = bit_replace(bit_rshift(data_l_1, count), data_l_2, 32 - count, count)
local data_2 = bit_arshift(data_l_2, count)
return from_u32(data_1, data_2)