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Fixed bitwise operators to work on Lua 5.2 and LuaJIT, and added tests.

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This is the first case where precompiled code is now platform-dependent.
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Bruce Hill 2018-07-30 14:26:55 -07:00
parent 9a948874d0
commit 7c488dd266
1 changed files with 37 additions and 9 deletions
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46
core/operators.nom
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@ -240,26 +240,54 @@ test:
compile [%x and %y] to (Lua value "(\(%x as lua expr) and \(%y as lua expr))")
compile [%x or %y] to (Lua value "(\(%x as lua expr) or \(%y as lua expr))")
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Bitwise Operators
# TODO: support bit.???() for luajit and bit32.??? for lua 5.2
# TODO: implement OR, XOR, AND for multiple operands?
test:
assume ((1 | 4) == 5)
assume ((1 ~ 3) == 2)
assume ((1 & 3) == 1)
assume ((1 << 2) == 4)
assume ((4 >> 2) == 1)
# Lua 5.3 introduced bit operators like | and &. Use them when possible, otherwise
fall back to bit.bor(), bit.band(), etc.
%use_bitops = ((is jit) or ((Lua version) == "Lua 5.2"))
compile [NOT %, ~ %] to (..)
Lua value (..)
(%use_bitops and "bit.bnot(\(% as lua expr))") or "~(\(% as lua expr))"
compile [%a OR %b, %a | %b] to (..)
Lua value "(\(%a as lua expr) | \(%b as lua expr))"
Lua value (..)
(%use_bitops and "bit.bor(\(%a as lua expr), \(%b as lua expr))") or ".."
(\(%a as lua expr) | \(%b as lua expr))
compile [%a XOR %b, %a ~ %b] to (..)
Lua value (..)
(%use_bitops and "bit.bxor(\(%a as lua expr), \(%b as lua expr))") or ".."
(\(%a as lua expr) ~ \(%b as lua expr))
compile [%a XOR %b] to (Lua value "(\(%a as lua expr) ^ \(%b as lua expr))")
compile [%a AND %b, %a & %b] to (..)
Lua value "(\(%a as lua expr) & \(%b as lua expr))"
Lua value (..)
(%use_bitops and "bit.band(\(%a as lua expr), \(%b as lua expr))") or ".."
(\(%a as lua expr) & \(%b as lua expr))
compile [NOT %, ~ %] to (Lua value "~(\(% as lua expr))")
compile [%x LSHIFT %shift, %x << %shift] to (..)
Lua value "(\(%x as lua expr) << \(%shift as lua expr))"
Lua value (..)
(%use_bitops and "bit.lshift(\(%x as lua expr), \(%shift as lua expr))") or ".."
(\(%x as lua expr) << \(%shift as lua expr))
compile [%x RSHIFT %shift, %x >>> %shift] to (..)
Lua value "(\(%x as lua expr) >>> \(%shift as lua expr))"
Lua value (..)
(%use_bitops and "bit.rshift(\(%x as lua expr), \(%shift as lua expr))") or ".."
(\(%x as lua expr) >>> \(%shift as lua expr))
compile [%x ARSHIFT %shift, %x >> %shift] to (..)
Lua value "(\(%x as lua expr) >> \(%shift as lua expr))"
Lua value (..)
(%use_bitops and "bit.arshift(\(%x as lua expr), \(%shift as lua expr))") or ".."
(\(%x as lua expr) >> \(%shift as lua expr))
# TODO: implement OR, XOR, AND for multiple operands?
# Unary operators
test:
assume ((- 5) == -5)