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c4ce20752b
This patch extends TableGen language with !cond operator.
Instead of embedding !if inside !if which can get cumbersome,
one can now use !cond.
Below is an example to convert an integer 'x' into a string:
!cond(!lt(x,0) : "Negative",
!eq(x,0) : "Zero",
!eq(x,1) : "One,
1 : "MoreThanOne")
Reviewed By: hfinkel, simon_tatham, greened
Differential Revision: https://reviews.llvm.org/D55758
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352185 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.2 KiB
TableGen
37 lines
1.2 KiB
TableGen
// Check support for `!cond' operator as part of a `let' statement.
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// RUN: llvm-tblgen %s | FileCheck %s
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// XFAIL: vg_leak
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class C<bits<3> x, bits<4> y, bit z> {
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bits<16> n;
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let n{11} = !cond(y{3}: 1,
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y{2}: x{0},
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y{1}: x{1},
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y{0}: x{2},
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{1} :?);
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let n{10-9}= !cond(x{2}: y{3-2},
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x{1}: y{2-1},
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x{1}: y{1-0},
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{1} : ?);
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let n{8-6} = !cond(x{2}: 0b010, 1 : 0b110);
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let n{5-4} = !cond(x{1}: y{3-2}, 1 : {0, 1});
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let n{3-0} = !cond(x{0}: y{3-0}, 1 : {z, y{2}, y{1}, y{0}});
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}
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def C1 : C<{1, 0, 1}, {0, 1, 0, 1}, 0>;
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def C2 : C<{0, 1, 0}, {1, 0, 1, 0}, 1>;
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def C3 : C<{0, 0, 0}, {1, 0, 1, 0}, 0>;
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def C4 : C<{0, 0, 0}, {0, 0, 0, 0}, 0>;
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// CHECK: def C1
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// CHECK-NEXT: bits<16> n = { ?, ?, ?, ?, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1 };
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// CHECK: def C2
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// CHECK-NEXT: bits<16> n = { ?, ?, ?, ?, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0 };
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// CHECK: def C3
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// CHECK-NEXT: bits<16> n = { ?, ?, ?, ?, 1, ?, ?, 1, 1, 0, 0, 1, 0, 0, 1, 0 };
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// CHECK: def C4
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// CHECK-NEXT: bits<16> n = { ?, ?, ?, ?, ?, ?, ?, 1, 1, 0, 0, 1, 0, 0, 0, 0 };
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