WebAssembly: add basic int/fp instruction codegen.

Summary: This patch has the most basic instruction codegen for 32 and 64 bit int/fp.

Reviewers: sunfish

Subscribers: llvm-commits, jfb

Differential Revision: http://reviews.llvm.org/D11193

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242201 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/WebAssembly/WebAssemblyInstrFloat.td

@@ -12,26 +12,33 @@
 ///
 //===----------------------------------------------------------------------===//
 
+defm FADD : BinaryFP<fadd>;
+defm FSUB : BinaryFP<fsub>;
+defm FMUL : BinaryFP<fmul>;
+defm FDIV : BinaryFP<fdiv>;
+defm FABS : UnaryFP<fabs>;
+defm FNEG : UnaryFP<fneg>;
+defm COPYSIGN : BinaryFP<fcopysign>;
+defm CEIL : UnaryFP<fceil>;
+defm FLOOR : UnaryFP<ffloor>;
+defm TRUNC : UnaryFP<ftrunc>;
+defm NEARESTINT : UnaryFP<fnearbyint>;
+
 /*
  * TODO(jfb): Add the following for 32-bit and 64-bit.
  *
- * float32.add: addition
- * float32.sub: subtraction
- * float32.mul: multiplication
- * float32.div: division
- * float32.abs: absolute value
- * float32.neg: negation
- * float32.copysign: copysign
- * float32.ceil: ceiling operation
- * float32.floor: floor operation
- * float32.trunc: round to nearest integer towards zero
- * float32.nearestint: round to nearest integer, ties to even
  * float32.eq: compare equal
  * float32.lt: less than
  * float32.le: less than or equal
  * float32.gt: greater than
  * float32.ge: greater than or equal
- * float32.sqrt: square root
+ */
+
+defm SQRT : UnaryFP<fsqrt>;
+
+/*
+ * TODO(jfb): Add the following for 32-bit and 64-bit.
+ *
  * float32.min: minimum (binary operator); if either operand is NaN, returns NaN
  * float32.max: maximum (binary operator); if either operand is NaN, returns NaN
  */

lib/Target/WebAssembly/WebAssemblyInstrFormats.td

@@ -27,3 +27,29 @@ class I<dag oops, dag iops, list<dag> pattern, string cstr = "">
   dag InOperandList  = iops;
   let Pattern        = pattern;
 }
+
+// Unary and binary instructions, for the local types that WebAssembly supports.
+multiclass UnaryInt<SDNode node> {
+  def _I32 : I<(outs Int32:$dst), (ins Int32:$src),
+               [(set Int32:$dst, (node Int32:$src))]>;
+  def _I64 : I<(outs Int64:$dst), (ins Int64:$src),
+               [(set Int64:$dst, (node Int64:$src))]>;
+}
+multiclass BinaryInt<SDNode node> {
+  def _I32 : I<(outs Int32:$dst), (ins Int32:$lhs, Int32:$rhs),
+               [(set Int32:$dst, (node Int32:$lhs, Int32:$rhs))]>;
+  def _I64 : I<(outs Int64:$dst), (ins Int64:$lhs, Int64:$rhs),
+               [(set Int64:$dst, (node Int64:$lhs, Int64:$rhs))]>;
+}
+multiclass UnaryFP<SDNode node> {
+  def _F32 : I<(outs Float32:$dst), (ins Float32:$src),
+               [(set Float32:$dst, (node Float32:$src))]>;
+  def _F64 : I<(outs Float64:$dst), (ins Float64:$src),
+               [(set Float64:$dst, (node Float64:$src))]>;
+}
+multiclass BinaryFP<SDNode node> {
+  def _F32 : I<(outs Float32:$dst), (ins Float32:$lhs, Float32:$rhs),
+               [(set Float32:$dst, (node Float32:$lhs, Float32:$rhs))]>;
+  def _F64 : I<(outs Float64:$dst), (ins Float64:$lhs, Float64:$rhs),
+               [(set Float64:$dst, (node Float64:$lhs, Float64:$rhs))]>;
+}

lib/Target/WebAssembly/WebAssemblyInstrInteger.td

@@ -12,22 +12,23 @@
 ///
 //===----------------------------------------------------------------------===//
 
+defm ADD : BinaryInt<add>;
+defm SUB : BinaryInt<sub>;
+defm MUL : BinaryInt<mul>;
+defm SDIV : BinaryInt<sdiv>;
+defm UDIV : BinaryInt<udiv>;
+defm SREM : BinaryInt<srem>;
+defm UREM : BinaryInt<urem>;
+defm AND : BinaryInt<and>;
+defm IOR : BinaryInt<or>;
+defm XOR : BinaryInt<xor>;
+defm SHL : BinaryInt<shl>;
+defm SHR : BinaryInt<srl>;
+defm SAR : BinaryInt<sra>;
+
 /*
  * TODO(jfb): Add the following for 32-bit and 64-bit.
  *
- * int32.add: signed-less addition
- * int32.sub: signed-less subtraction
- * int32.mul: signed-less multiplication (lower 32-bits)
- * int32.sdiv: signed division
- * int32.udiv: unsigned division
- * int32.srem: signed remainder
- * int32.urem: unsigned remainder
- * int32.and: signed-less logical and
- * int32.ior: signed-less inclusive or
- * int32.xor: signed-less exclusive or
- * int32.shl: signed-less shift left
- * int32.shr: signed-less logical shift right
- * int32.sar: signed-less arithmetic shift right
  * int32.eq: signed-less compare equal
  * int32.slt: signed less than
  * int32.sle: signed less than or equal
@@ -37,7 +38,8 @@
  * int32.sge: signed greater than or equal
  * int32.ugt: unsigned greater than
  * int32.uge: unsigned greater than or equal
- * int32.clz: count leading zeroes (defined for all values, including zero)
- * int32.ctz: count trailing zeroes (defined for all values, including zero)
- * int32.popcnt: count number of ones
  */
+
+defm CLZ : UnaryInt<ctlz>;
+defm CTZ : UnaryInt<cttz>;
+defm POPCNT : UnaryInt<ctpop>;