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Add x86-specific shuffle instructions

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This includes both PSHUFD and PSHUFB; these are necessary to legalize future SIMD instructions.
This commit is contained in:
Andrew Brown
2019-07-11 13:12:25 -07:00
committed by Dan Gohman
parent 61772e9775
commit 683e7c75a3
5 changed files with 125 additions and 1 deletions
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22
cranelift/codegen/meta/src/isa/x86/recipes.rs
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@@ -367,6 +367,7 @@ pub fn define<'shared>(
let f_call = formats.by_name("Call");
let f_call_indirect = formats.by_name("CallIndirect");
let f_copy_special = formats.by_name("CopySpecial");
let f_extract_lane = formats.by_name("ExtractLane"); // TODO this would preferably retrieve a BinaryImm8 format but because formats are compared structurally and ExtractLane has the same structure this is impossible--if we rename ExtractLane, it may even impact parsing
let f_float_compare = formats.by_name("FloatCompare");
let f_float_cond = formats.by_name("FloatCond");
let f_float_cond_trap = formats.by_name("FloatCondTrap");
@@ -794,6 +795,27 @@ pub fn define<'shared>(
);
}
// XX /r ib with 8-bit unsigned immediate (e.g. for pshufd)
{
let format = formats.get(f_extract_lane);
recipes.add_template_recipe(
EncodingRecipeBuilder::new("r_ib_unsigned", f_extract_lane, 2)
.operands_in(vec![fpr])
.operands_out(vec![fpr])
.inst_predicate(InstructionPredicate::new_is_unsigned_int(
format, "lane", 8, 0,
)) // TODO if the format name is changed then "lane" should be renamed to something more appropriate--ordering mask? broadcast immediate?
.emit(
r#"
{{PUT_OP}}(bits, rex2(in_reg0, out_reg0), sink);
modrm_rr(in_reg0, out_reg0, sink);
let imm:i64 = lane.into();
sink.put1(imm as u8);
"#,
),
);
}
{
// XX /n id with 32-bit immediate sign-extended. UnaryImm version.
let format = formats.get(f_unary_imm);