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Add Rust implementation and address review comments of #742;

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This commit is contained in:
Benjamin Bouvier
2019-05-17 17:16:52 +02:00
parent 71a345e813
commit 97ebaa6f37
3 changed files with 49 additions and 18 deletions
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37
cranelift/codegen/meta-python/base/legalize.py
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@@ -261,23 +261,6 @@ for binop in [iadd_imm, imul_imm, udiv_imm, urem_imm]:
for binop in [sdiv_imm, srem_imm]:
widen_imm(True, binop)
# Use expand instead of widen, because widen only gets applied for i8 and i16
# base type vars, but these take f32 and f64 as base type var.
for ty in [types.f32, types.f64]:
for int_ty in [types.i8, types.i16]:
expand.legalize(
a << insts.fcvt_from_uint.bind(ty).bind(int_ty)(b),
Rtl(
x << uextend.i32(b),
a << insts.fcvt_from_uint.bind(ty).i32(x),
))
expand.legalize(
a << insts.fcvt_from_sint.bind(ty).bind(int_ty)(b),
Rtl(
x << sextend.i32(b),
a << insts.fcvt_from_sint.bind(ty).i32(x),
))
widen_imm(False, irsub_imm)
# bit ops
@@ -492,6 +475,26 @@ expand.legalize(
b << bor(b1, b2)
))
# Expansions for fcvt_from_{u,s}int for smaller integer types.
# These use expand and not widen because the controlling type variable for
# these instructions are f32/f64, which are legalized as part of the expand
# group.
for dest_ty in [types.f32, types.f64]:
for src_ty in [types.i8, types.i16]:
expand.legalize(
a << insts.fcvt_from_uint.bind(dest_ty).bind(src_ty)(b),
Rtl(
x << uextend.i32(b),
a << insts.fcvt_from_uint.bind(dest_ty).i32(x),
))
expand.legalize(
a << insts.fcvt_from_sint.bind(dest_ty).bind(src_ty)(b),
Rtl(
x << sextend.i32(b),
a << insts.fcvt_from_sint.bind(dest_ty).i32(x),
))
# Expansions for immediate operands that are out of range.
for inst_imm, inst in [
(iadd_imm, iadd),