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[WebAssembly] Implement the eqz instructions. 

llvm-svn: 263976
This commit is contained in:
Dan Gohman 2016-03-21 19:54:41 +00:00
parent 2e5c526bb1
commit c8d7f14506
3 changed files with 29 additions and 0 deletions
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7
llvm/lib/Target/WebAssembly/WebAssemblyInstrInteger.td
View File

@ -54,6 +54,13 @@ defm CLZ : UnaryInt<ctlz, "clz ">;
defm CTZ : UnaryInt<cttz, "ctz ">;
defm POPCNT : UnaryInt<ctpop, "popcnt">;
def EQZ_I32 : I<(outs I32:$dst), (ins I32:$src),
[(set I32:$dst, (setcc I32:$src, 0, SETEQ))],
"i32.eqz \t$dst, $src">;
def EQZ_I64 : I<(outs I32:$dst), (ins I64:$src),
[(set I32:$dst, (setcc I64:$src, 0, SETEQ))],
"i64.eqz \t$dst, $src">;
} // Defs = [ARGUMENTS]
// Expand the "don't care" operations to supported operations.

11
llvm/test/CodeGen/WebAssembly/i32.ll
View File

@ -188,3 +188,14 @@ define i32 @popcnt32(i32 %x) {
%a = call i32 @llvm.ctpop.i32(i32 %x)
ret i32 %a
}
; CHECK-LABEL: eqz32:
; CHECK-NEXT: .param i32{{$}}
; CHECK-NEXT: .result i32{{$}}
; CHECK-NEXT: i32.eqz $push0=, $0{{$}}
; CHECK-NEXT: return $pop0{{$}}
define i32 @eqz32(i32 %x) {
%a = icmp eq i32 %x, 0
%b = zext i1 %a to i32
ret i32 %b
}

11
llvm/test/CodeGen/WebAssembly/i64.ll
View File

@ -188,3 +188,14 @@ define i64 @popcnt64(i64 %x) {
%a = call i64 @llvm.ctpop.i64(i64 %x)
ret i64 %a
}
; CHECK-LABEL: eqz64:
; CHECK-NEXT: .param i64{{$}}
; CHECK-NEXT: .result i32{{$}}
; CHECK-NEXT: i64.eqz $push0=, $0{{$}}
; CHECK-NEXT: return $pop0{{$}}
define i32 @eqz64(i64 %x) {
%a = icmp eq i64 %x, 0
%b = zext i1 %a to i32
ret i32 %b
}