forked from OSchip/llvm-project
[X86] AMD Zen 3: same-reg AVX YMM VANDNPS is a zero-cycle(!) dep-breaking zero-idiom
As confirmed by exegesis measurements, and ref docs.
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@ -1542,7 +1542,8 @@ def Zn3WriteFZeroIdiomY : SchedWriteVariant<[
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SchedVar<MCSchedPredicate<ZeroIdiomPredicate>, [Zn3WriteZeroLatency]>,
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SchedVar<MCSchedPredicate<ZeroIdiomPredicate>, [Zn3WriteZeroLatency]>,
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SchedVar<NoSchedPred, [WriteFLogicY]>
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SchedVar<NoSchedPred, [WriteFLogicY]>
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]>;
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]>;
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def : InstRW<[Zn3WriteFZeroIdiomY], (instrs VXORPSYrr, VXORPDYrr)>;
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def : InstRW<[Zn3WriteFZeroIdiomY], (instrs VXORPSYrr, VXORPDYrr,
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VANDNPSYrr)>;
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def : IsZeroIdiomFunction<[
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def : IsZeroIdiomFunction<[
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// GPR Zero-idioms.
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// GPR Zero-idioms.
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@ -1560,7 +1561,8 @@ def : IsZeroIdiomFunction<[
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VANDNPSrr ], ZeroIdiomPredicate>,
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VANDNPSrr ], ZeroIdiomPredicate>,
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// AVX YMM Zero-idioms.
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// AVX YMM Zero-idioms.
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DepBreakingClass<[ VXORPSYrr, VXORPDYrr ], ZeroIdiomPredicate>,
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DepBreakingClass<[ VXORPSYrr, VXORPDYrr,
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VANDNPSYrr ], ZeroIdiomPredicate>,
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]>;
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]>;
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def : IsDepBreakingFunction<[
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def : IsDepBreakingFunction<[
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@ -202,13 +202,13 @@ vandnps %ymm1, %ymm0, %ymm0
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# CHECK: Iterations: 10000
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# CHECK: Iterations: 10000
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# CHECK-NEXT: Instructions: 20000
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# CHECK-NEXT: Instructions: 20000
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# CHECK-NEXT: Total Cycles: 20003
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# CHECK-NEXT: Total Cycles: 3337
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# CHECK-NEXT: Total uOps: 20000
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# CHECK-NEXT: Total uOps: 20000
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# CHECK: Dispatch Width: 6
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# CHECK: Dispatch Width: 6
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# CHECK-NEXT: uOps Per Cycle: 1.00
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# CHECK-NEXT: uOps Per Cycle: 5.99
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# CHECK-NEXT: IPC: 1.00
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# CHECK-NEXT: IPC: 5.99
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# CHECK-NEXT: Block RThroughput: 0.5
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# CHECK-NEXT: Block RThroughput: 0.3
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# CHECK: Instruction Info:
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# CHECK: Instruction Info:
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# CHECK-NEXT: [1]: #uOps
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# CHECK-NEXT: [1]: #uOps
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@ -219,17 +219,17 @@ vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: [6]: HasSideEffects (U)
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# CHECK-NEXT: [6]: HasSideEffects (U)
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# CHECK: [1] [2] [3] [4] [5] [6] Instructions:
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# CHECK: [1] [2] [3] [4] [5] [6] Instructions:
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# CHECK-NEXT: 1 1 0.25 vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: 1 0 0.17 vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: 1 1 0.25 vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: 1 1 0.25 vandnps %ymm1, %ymm0, %ymm0
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# CHECK: Register File statistics:
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# CHECK: Register File statistics:
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# CHECK-NEXT: Total number of mappings created: 20000
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# CHECK-NEXT: Total number of mappings created: 10000
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# CHECK-NEXT: Max number of mappings used: 66
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# CHECK-NEXT: Max number of mappings used: 9
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# CHECK: * Register File #1 -- Zn3FpPRF:
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# CHECK: * Register File #1 -- Zn3FpPRF:
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# CHECK-NEXT: Number of physical registers: 160
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# CHECK-NEXT: Number of physical registers: 160
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# CHECK-NEXT: Total number of mappings created: 20000
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# CHECK-NEXT: Total number of mappings created: 10000
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# CHECK-NEXT: Max number of mappings used: 66
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# CHECK-NEXT: Max number of mappings used: 9
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# CHECK: * Register File #2 -- Zn3IntegerPRF:
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# CHECK: * Register File #2 -- Zn3IntegerPRF:
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# CHECK-NEXT: Number of physical registers: 192
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# CHECK-NEXT: Number of physical registers: 192
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@ -263,20 +263,20 @@ vandnps %ymm1, %ymm0, %ymm0
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# CHECK: Resource pressure per iteration:
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# CHECK: Resource pressure per iteration:
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# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12.0] [12.1] [13] [14.0] [14.1] [14.2] [15.0] [15.1] [15.2] [16.0] [16.1]
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# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12.0] [12.1] [13] [14.0] [14.1] [14.2] [15.0] [15.1] [15.2] [16.0] [16.1]
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# CHECK-NEXT: - - - - - - - - 0.50 0.50 0.50 0.50 - - - - - - - - - - -
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# CHECK-NEXT: - - - - - - - - 0.25 0.25 0.25 0.25 - - - - - - - - - - -
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# CHECK: Resource pressure by instruction:
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# CHECK: Resource pressure by instruction:
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# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12.0] [12.1] [13] [14.0] [14.1] [14.2] [15.0] [15.1] [15.2] [16.0] [16.1] Instructions:
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# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12.0] [12.1] [13] [14.0] [14.1] [14.2] [15.0] [15.1] [15.2] [16.0] [16.1] Instructions:
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# CHECK-NEXT: - - - - - - - - - 0.50 - 0.50 - - - - - - - - - - - vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: - - - - - - - - - - - - - - - - - - - - - - - vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: - - - - - - - - 0.50 - 0.50 - - - - - - - - - - - - vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: - - - - - - - - 0.25 0.25 0.25 0.25 - - - - - - - - - - - vandnps %ymm1, %ymm0, %ymm0
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# CHECK: Timeline view:
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# CHECK: Timeline view:
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# CHECK-NEXT: Index 0123456
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# CHECK-NEXT: Index 0123
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# CHECK: [0,0] DeER .. vandnps %ymm0, %ymm0, %ymm0
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# CHECK: [0,0] DR . vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: [0,1] D=eER.. vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: [0,1] DeER vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: [1,0] D==eER. vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: [1,0] D--R vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: [1,1] D===eER vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: [1,1] DeER vandnps %ymm1, %ymm0, %ymm0
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# CHECK: Average Wait times (based on the timeline view):
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# CHECK: Average Wait times (based on the timeline view):
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# CHECK-NEXT: [0]: Executions
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# CHECK-NEXT: [0]: Executions
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@ -285,6 +285,6 @@ vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
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# CHECK-NEXT: [3]: Average time elapsed from WB until retire stage
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# CHECK: [0] [1] [2] [3]
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# CHECK: [0] [1] [2] [3]
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# CHECK-NEXT: 0. 2 2.0 0.5 0.0 vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: 0. 2 0.0 0.0 1.0 vandnps %ymm0, %ymm0, %ymm0
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# CHECK-NEXT: 1. 2 3.0 0.0 0.0 vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: 1. 2 1.0 1.0 0.0 vandnps %ymm1, %ymm0, %ymm0
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# CHECK-NEXT: 2 2.5 0.3 0.0 <total>
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# CHECK-NEXT: 2 0.5 0.5 0.5 <total>
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