[
    {
        "EventCode": "0xC1",
        "Counter": "0,1,2,3",
        "UMask": "0x8",
        "Errata": "HSD56, HSM57",
        "EventName": "OTHER_ASSISTS.AVX_TO_SSE",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of transitions from AVX-256 to legacy SSE when penalty applicable.",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "EventCode": "0xC1",
        "Counter": "0,1,2,3",
        "UMask": "0x10",
        "Errata": "HSD56, HSM57",
        "EventName": "OTHER_ASSISTS.SSE_TO_AVX",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of transitions from SSE to AVX-256 when penalty applicable.",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "PublicDescription": "Number of X87 FP assists due to output values.",
        "EventCode": "0xCA",
        "Counter": "0,1,2,3",
        "UMask": "0x2",
        "EventName": "FP_ASSIST.X87_OUTPUT",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of X87 assists due to output value.",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "PublicDescription": "Number of X87 FP assists due to input values.",
        "EventCode": "0xCA",
        "Counter": "0,1,2,3",
        "UMask": "0x4",
        "EventName": "FP_ASSIST.X87_INPUT",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of X87 assists due to input value.",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "PublicDescription": "Number of SIMD FP assists due to output values.",
        "EventCode": "0xCA",
        "Counter": "0,1,2,3",
        "UMask": "0x8",
        "EventName": "FP_ASSIST.SIMD_OUTPUT",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of SIMD FP assists due to Output values",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "PublicDescription": "Number of SIMD FP assists due to input values.",
        "EventCode": "0xCA",
        "Counter": "0,1,2,3",
        "UMask": "0x10",
        "EventName": "FP_ASSIST.SIMD_INPUT",
        "SampleAfterValue": "100003",
        "BriefDescription": "Number of SIMD FP assists due to input values",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    },
    {
        "PublicDescription": "Cycles with any input/output SSE* or FP assists.",
        "EventCode": "0xCA",
        "Counter": "0,1,2,3",
        "UMask": "0x1e",
        "EventName": "FP_ASSIST.ANY",
        "SampleAfterValue": "100003",
        "BriefDescription": "Cycles with any input/output SSE or FP assist",
        "CounterMask": "1",
        "CounterHTOff": "0,1,2,3"
    },
    {
        "PublicDescription": "Note that a whole rep string only counts AVX_INST.ALL once.",
        "EventCode": "0xC6",
        "Counter": "0,1,2,3",
        "UMask": "0x7",
        "EventName": "AVX_INSTS.ALL",
        "SampleAfterValue": "2000003",
        "BriefDescription": "Approximate counts of AVX & AVX2 256-bit instructions, including non-arithmetic instructions, loads, and stores.  May count non-AVX instructions that employ 256-bit operations, including (but not necessarily limited to) rep string instructions that use 256-bit loads and stores for optimized performance, XSAVE* and XRSTOR*, and operations that transition the x87 FPU data registers between x87 and MMX.",
        "CounterHTOff": "0,1,2,3,4,5,6,7"
    }
]