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[machinst x64]: add extractlane implementation

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This commit is contained in:
Andrew Brown
2020-09-23 07:13:53 -07:00
parent 29fa894790
commit f4836f9ca9
4 changed files with 100 additions and 6 deletions
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26
cranelift/codegen/src/isa/x64/inst/emit.rs
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@@ -1915,7 +1915,7 @@ pub(crate) fn emit(
imm,
is64: w,
} => {
let (prefix, opcode, num_opcodes) = match op {
let (prefix, opcode, len) = match op {
SseOpcode::Cmpps => (LegacyPrefixes::None, 0x0FC2, 2),
SseOpcode::Cmppd => (LegacyPrefixes::_66, 0x0FC2, 2),
SseOpcode::Cmpss => (LegacyPrefixes::_F3, 0x0FC2, 2),
@@ -1924,6 +1924,10 @@ pub(crate) fn emit(
SseOpcode::Pinsrb => (LegacyPrefixes::_66, 0x0F3A20, 3),
SseOpcode::Pinsrw => (LegacyPrefixes::_66, 0x0FC4, 2),
SseOpcode::Pinsrd => (LegacyPrefixes::_66, 0x0F3A22, 3),
SseOpcode::Pextrb => (LegacyPrefixes::_66, 0x0F3A14, 3),
SseOpcode::Pextrw => (LegacyPrefixes::_66, 0x0FC5, 2),
SseOpcode::Pextrd => (LegacyPrefixes::_66, 0x0F3A16, 3),
SseOpcode::Pshufd => (LegacyPrefixes::_66, 0x0F70, 2),
_ => unimplemented!("Opcode {:?} not implemented", op),
};
let rex = if *w {
@@ -1931,13 +1935,29 @@ pub(crate) fn emit(
} else {
RexFlags::clear_w()
};
let regs_swapped = match *op {
// These opcodes (and not the SSE2 version of PEXTRW) flip the operand
// encoding: `dst` in ModRM's r/m, `src` in ModRM's reg field.
SseOpcode::Pextrb | SseOpcode::Pextrd => true,
// The rest of the opcodes have the customary encoding: `dst` in ModRM's reg,
// `src` in ModRM's r/m field.
_ => false,
};
match src {
RegMem::Reg { reg } => {
emit_std_reg_reg(sink, prefix, opcode, num_opcodes, dst.to_reg(), *reg, rex);
if regs_swapped {
emit_std_reg_reg(sink, prefix, opcode, len, *reg, dst.to_reg(), rex);
} else {
emit_std_reg_reg(sink, prefix, opcode, len, dst.to_reg(), *reg, rex);
}
}
RegMem::Mem { addr } => {
let addr = &addr.finalize(state);
emit_std_reg_mem(sink, prefix, opcode, num_opcodes, dst.to_reg(), addr, rex);
assert!(
!regs_swapped,
"No existing way to encode a mem argument in the ModRM r/m field."
);
emit_std_reg_mem(sink, prefix, opcode, len, dst.to_reg(), addr, rex);
}
}
sink.put1(*imm)