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Add population operations to runtime

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This commit is contained in:
Rerumu 2022-06-16 04:17:14 -04:00
parent c5f7e386c2
commit d654186234
1 changed files with 39 additions and 2 deletions
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41
codegen-luajit/runtime/runtime.lua
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@ -11,6 +11,9 @@ local math_ceil = math.ceil
local math_floor = math.floor local math_floor = math.floor
local to_number = tonumber local to_number = tonumber
local ID_ZERO = i64(0)
local ID_ONE = i64(1)
local function truncate(num) local function truncate(num)
if num >= 0 then if num >= 0 then
return (math_floor(num)) return (math_floor(num))
@ -32,7 +35,6 @@ do
local to_signed = bit.tobit local to_signed = bit.tobit
local math_abs = math.abs local math_abs = math.abs
local ID_ONE = i64(1)
local RE_INSTANCE = ffi.new([[union { local RE_INSTANCE = ffi.new([[union {
double f64; double f64;
struct { int32_t a32, b32; }; struct { int32_t a32, b32; };
@ -171,6 +173,41 @@ do
return count return count
end end
function clz.i64(num)
for i = 0, 63 do
local mask = lj_lshift(ID_ONE, 63 - i)
if lj_band(num, mask) ~= ID_ZERO then
return i * ID_ONE
end
end
return 64 * ID_ONE
end
function ctz.i64(num)
for i = 0, 63 do
local mask = lj_lshift(ID_ONE, i)
if lj_band(num, mask) ~= ID_ZERO then
return i * ID_ONE
end
end
return 64 * ID_ONE
end
function popcnt.i64(num)
local count = ID_ZERO
while num ~= ID_ZERO do
num = lj_band(num, num - 1)
count = count + ID_ONE
end
return count
end
module.clz = clz module.clz = clz
module.ctz = ctz module.ctz = ctz
module.popcnt = popcnt module.popcnt = popcnt
@ -293,7 +330,7 @@ do
extend.i64_i32 = i64 extend.i64_i32 = i64
function extend.u64_i32(num) function extend.u64_i32(num)
RE_INSTANCE.i64 = 0 RE_INSTANCE.i64 = ID_ZERO
RE_INSTANCE.i32 = num RE_INSTANCE.i32 = num
return RE_INSTANCE.i64 return RE_INSTANCE.i64