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ISLE: port fmin, fmax, fmin_pseudo, fmax_pseudo on x64. (#3856)

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This commit is contained in:
Chris Fallin
2022-02-28 14:40:26 -08:00
committed by GitHub
parent d9dfc44c32
commit cd173cfe8e
7 changed files with 938 additions and 482 deletions
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18
cranelift/codegen/src/isa/x64/inst/emit.rs
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@@ -1696,8 +1696,11 @@ pub(crate) fn emit(
size,
is_min,
lhs,
rhs_dst,
rhs,
dst,
} => {
debug_assert_eq!(*rhs, dst.to_reg());
// Generates the following sequence:
// cmpss/cmpsd %lhs, %rhs_dst
// jnz do_min_max
@@ -1747,8 +1750,7 @@ pub(crate) fn emit(
_ => unreachable!(),
};
let inst =
Inst::xmm_cmp_rm_r(cmp_op, RegMem::reg(lhs.to_reg()), rhs_dst.to_reg().to_reg());
let inst = Inst::xmm_cmp_rm_r(cmp_op, RegMem::reg(lhs.to_reg()), dst.to_reg().to_reg());
inst.emit(sink, info, state);
one_way_jmp(sink, CC::NZ, do_min_max);
@@ -1758,7 +1760,7 @@ pub(crate) fn emit(
// and negative zero. These instructions merge the sign bits in that
// case, and are no-ops otherwise.
let op = if *is_min { or_op } else { and_op };
let inst = Inst::xmm_rm_r(op, RegMem::reg(lhs.to_reg()), rhs_dst.to_writable_reg());
let inst = Inst::xmm_rm_r(op, RegMem::reg(lhs.to_reg()), dst.to_writable_reg());
inst.emit(sink, info, state);
let inst = Inst::jmp_known(done);
@@ -1768,17 +1770,13 @@ pub(crate) fn emit(
// read-only operand: perform an addition between the two operands, which has the
// desired NaN propagation effects.
sink.bind_label(propagate_nan);
let inst = Inst::xmm_rm_r(add_op, RegMem::reg(lhs.to_reg()), rhs_dst.to_writable_reg());
let inst = Inst::xmm_rm_r(add_op, RegMem::reg(lhs.to_reg()), dst.to_writable_reg());
inst.emit(sink, info, state);
one_way_jmp(sink, CC::P, done);
sink.bind_label(do_min_max);
let inst = Inst::xmm_rm_r(
min_max_op,
RegMem::reg(lhs.to_reg()),
rhs_dst.to_writable_reg(),
);
let inst = Inst::xmm_rm_r(min_max_op, RegMem::reg(lhs.to_reg()), dst.to_writable_reg());
inst.emit(sink, info, state);
sink.bind_label(done);