forked from OSchip/llvm-project
102 lines
4.0 KiB
TableGen
102 lines
4.0 KiB
TableGen
// WebAssemblyInstrFloat.td-WebAssembly Float codegen support ---*- tablegen -*-
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief WebAssembly Floating-point operand code-gen constructs.
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///
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//===----------------------------------------------------------------------===//
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let Defs = [ARGUMENTS] in {
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let isCommutable = 1 in
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defm ADD : BinaryFP<fadd, "add ">;
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defm SUB : BinaryFP<fsub, "sub ">;
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let isCommutable = 1 in
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defm MUL : BinaryFP<fmul, "mul ">;
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defm DIV : BinaryFP<fdiv, "div ">;
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defm SQRT : UnaryFP<fsqrt, "sqrt">;
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defm ABS : UnaryFP<fabs, "abs ">;
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defm NEG : UnaryFP<fneg, "neg ">;
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defm COPYSIGN : BinaryFP<fcopysign, "copysign">;
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let isCommutable = 1 in {
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defm MIN : BinaryFP<fminnan, "min ">;
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defm MAX : BinaryFP<fmaxnan, "max ">;
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} // isCommutable = 1
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defm CEIL : UnaryFP<fceil, "ceil">;
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defm FLOOR : UnaryFP<ffloor, "floor">;
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defm TRUNC : UnaryFP<ftrunc, "trunc">;
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defm NEAREST : UnaryFP<fnearbyint, "nearest">;
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} // Defs = [ARGUMENTS]
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// DAGCombine oddly folds casts into the rhs of copysign. Unfold them.
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def : Pat<(fcopysign F64:$lhs, F32:$rhs),
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(COPYSIGN_F64 F64:$lhs, (F64_PROMOTE_F32 F32:$rhs))>;
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def : Pat<(fcopysign F32:$lhs, F64:$rhs),
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(COPYSIGN_F32 F32:$lhs, (F32_DEMOTE_F64 F64:$rhs))>;
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// WebAssembly doesn't expose inexact exceptions, so map frint to fnearbyint.
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def : Pat<(frint f32:$src), (NEAREST_F32 f32:$src)>;
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def : Pat<(frint f64:$src), (NEAREST_F64 f64:$src)>;
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let Defs = [ARGUMENTS] in {
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let isCommutable = 1 in {
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defm EQ : ComparisonFP<SETOEQ, "eq ">;
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defm NE : ComparisonFP<SETUNE, "ne ">;
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} // isCommutable = 1
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defm LT : ComparisonFP<SETOLT, "lt ">;
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defm LE : ComparisonFP<SETOLE, "le ">;
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defm GT : ComparisonFP<SETOGT, "gt ">;
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defm GE : ComparisonFP<SETOGE, "ge ">;
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} // Defs = [ARGUMENTS]
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// Don't care floating-point comparisons, supported via other comparisons.
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def : Pat<(seteq f32:$lhs, f32:$rhs), (EQ_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(setne f32:$lhs, f32:$rhs), (NE_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(setlt f32:$lhs, f32:$rhs), (LT_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(setle f32:$lhs, f32:$rhs), (LE_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(setgt f32:$lhs, f32:$rhs), (GT_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(setge f32:$lhs, f32:$rhs), (GE_F32 f32:$lhs, f32:$rhs)>;
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def : Pat<(seteq f64:$lhs, f64:$rhs), (EQ_F64 f64:$lhs, f64:$rhs)>;
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def : Pat<(setne f64:$lhs, f64:$rhs), (NE_F64 f64:$lhs, f64:$rhs)>;
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def : Pat<(setlt f64:$lhs, f64:$rhs), (LT_F64 f64:$lhs, f64:$rhs)>;
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def : Pat<(setle f64:$lhs, f64:$rhs), (LE_F64 f64:$lhs, f64:$rhs)>;
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def : Pat<(setgt f64:$lhs, f64:$rhs), (GT_F64 f64:$lhs, f64:$rhs)>;
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def : Pat<(setge f64:$lhs, f64:$rhs), (GE_F64 f64:$lhs, f64:$rhs)>;
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let Defs = [ARGUMENTS] in {
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def SELECT_F32 : I<(outs F32:$dst), (ins F32:$lhs, F32:$rhs, I32:$cond),
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[(set F32:$dst, (select I32:$cond, F32:$lhs, F32:$rhs))],
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"f32.select\t$dst, $lhs, $rhs, $cond">;
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def SELECT_F64 : I<(outs F64:$dst), (ins F64:$lhs, F64:$rhs, I32:$cond),
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[(set F64:$dst, (select I32:$cond, F64:$lhs, F64:$rhs))],
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"f64.select\t$dst, $lhs, $rhs, $cond">;
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} // Defs = [ARGUMENTS]
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// ISD::SELECT requires its operand to conform to getBooleanContents, but
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// WebAssembly's select interprets any non-zero value as true, so we can fold
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// a setne with 0 into a select.
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def : Pat<(select (i32 (setne I32:$cond, 0)), F32:$lhs, F32:$rhs),
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(SELECT_F32 F32:$lhs, F32:$rhs, I32:$cond)>;
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def : Pat<(select (i32 (setne I32:$cond, 0)), F64:$lhs, F64:$rhs),
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(SELECT_F64 F64:$lhs, F64:$rhs, I32:$cond)>;
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// And again, this time with seteq instead of setne and the arms reversed.
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def : Pat<(select (i32 (seteq I32:$cond, 0)), F32:$lhs, F32:$rhs),
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(SELECT_F32 F32:$rhs, F32:$lhs, I32:$cond)>;
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def : Pat<(select (i32 (seteq I32:$cond, 0)), F64:$lhs, F64:$rhs),
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(SELECT_F64 F64:$rhs, F64:$lhs, I32:$cond)>;
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