[Libclc-dev] [PATCH] relational: Implement shuffle builtin
Jeroen Ketema via Libclc-dev
libclc-dev at lists.llvm.org
Tue Oct 3 10:50:05 PDT 2017
Hi Aaron,
A bit late to the party, but with LLVM 5.0 the IR being generated for this (for at least NVPTX) is rather ugly. I see sequences like the following appear quite a few number of times:
%1 = extractelement <4 x i32> %and.i, i32 0, !dbg !70
%trunc.i = trunc i32 %1 to i2, !dbg !70
switch i2 %trunc.i, label %__clc_get_el_int4_uint.exit34.i [
i2 0, label %sw.bb.i.i
i2 1, label %__clc_get_el_int4_uint.exit.i
i2 -2, label %sw.bb2.i.i
i2 -1, label %sw.bb3.i.i
], !dbg !70
sw.bb.i.i: ; preds = %entry
br label %__clc_get_el_int4_uint.exit.i, !dbg !70
sw.bb2.i.i: ; preds = %entry
br label %__clc_get_el_int4_uint.exit.i, !dbg !70
sw.bb3.i.i: ; preds = %entry
br label %__clc_get_el_int4_uint.exit.i, !dbg !70
__clc_get_el_int4_uint.exit34.i: ; preds = %entry
unreachable, !dbg !70
__clc_get_el_int4_uint.exit.i: ; preds = %sw.bb3.i.i, %sw.bb2.i.i, %sw.bb.i.i, %entry
This seems to be a missed optimisation in the SimplifyCFG pass. Is this a known issue?
Thanks,
Jeroen
> On 1 Sep 2017, at 21:55, Jan Vesely via Libclc-dev <libclc-dev at lists.llvm.org> wrote:
>
> On Fri, 2017-09-01 at 14:42 -0500, Aaron Watry wrote:
>> On Fri, Sep 1, 2017 at 2:21 PM, Aaron Watry <awatry at gmail.com> wrote:
>>> On Thu, Aug 31, 2017 at 5:14 PM, Jan Vesely <jan.vesely at rutgers.edu> wrote:
>>>> On Thu, 2017-08-31 at 11:59 -0400, Jan Vesely wrote:
>>>>> On Sun, 2017-06-11 at 22:04 -0500, Aaron Watry via Libclc-dev wrote:
>>>>>> This was added in CL 1.1
>>>>>>
>>>>>> Tested with a Radeon HD 7850 (Pitcairn) using the CL CTS via:
>>>>>> test_conformance/relationals/test_relationals shuffle_built_in
>>>>>
>>>>> sorry it took so long. I think there are still parts missing but we
>>>>> might be able to get away with it if clang can handle mask type
>>>>> conversion implicitly.
>>>>> it also needs to ignore the high bits of mask elements.
>>>>> see inline comments.
>>>>
>>>> looks like I was wrong on both accounts.
>>>
>>> Yeah, I did this with an 'mask &= (MASKTYPE##N)(ARGSIZE-1)' as the
>>> first piece of the function implementation, instead of in the switch
>>> statement. I did test this using the CTS, which handled float/double,
>>> but doesn't have fp16 tests. I'll see what I need to do to get this
>>> working on my SI using your piglit tests (assuming that I can).
>>>
>>> I'll also go ahead and move this to a new misc/ directory as
>>> suggested. If I can manage to test the fp16 support myself, do you
>>> want to see the new version,or would the review stand, assuming that
>>> all I have to add is:
>>>
>>> #ifdef cl_khr_fp16
>>> #pragma OPENCL EXTENSION cl_khr_fp16 : enable
>>> _CLC_VECTOR_SHUFFLE_INSIZE(half, ushort)
>>> #endif
>
> afaik this should be enough wrt to shuffle.
>
>>>
>>> --Aaron
>>
>> Note: I had to also add the half type definitions in
>> float/definitions.h.
>
> hm, I assumed we already had some half precision support in libclc.
> If it means that you need to add all infrastructure, feel free to skip
> this for shuffle{,2}. Sorry, should have checked it.
>
>> I'll re-send this piece as 1 patch, and then v2
>> of the two shuffle patches a parts 2/3, just so you can verify the
>> type definitions. half-precision is not something I've even started
>> to look into yet, but it seems like something you've possibly got a
>> use for, and possibly an ability to test (I believe that VI was the
>> first generation with fp16 support).
>
> clang enables cl_khr_fp16 on everything >=gfx6 (which I believe is SI),
> so you should be able to test it. I think you're correct that VI added
> fp16 instructions, but they're not strictly required.
> We don't expose any of this in clover however. so you'll either need to
> disable the piglit requirement or modify clover.
> I can test on carrizo if you post the patches that include fp16.
>
> Jan
>>
>> --Aaron
>>
>>>
>>>> If you add half version and move this to clc/misc:
>>>> Reviewed-by: Jan Vesely <jan.vesely at rutgers.edu>
>>>>
>>>>>
>>>>> I haven't tested it yet. I'll try to do that and provide shuffle2
>>>>> piglits asap.
>>>>
>>>> works at least on carrizo/iceland with llvm 5.0
>>>>
>>>> Jan
>>>>
>>>>>
>>>>>>
>>>>>> Signed-off-by: Aaron Watry <awatry at gmail.com>
>>>>>> ---
>>>>>> generic/include/clc/clc.h | 1 +
>>>>>> generic/include/clc/relational/shuffle.h | 44 +++++++++
>>>>>> generic/lib/SOURCES | 1 +
>>>>>> generic/lib/relational/shuffle.cl | 153 +++++++++++++++++++++++++++++++
>>>>>> 4 files changed, 199 insertions(+)
>>>>>> create mode 100644 generic/include/clc/relational/shuffle.h
>>>>>> create mode 100644 generic/lib/relational/shuffle.cl
>>>>>>
>>>>>> diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
>>>>>> index 4c29214..ac1dab5 100644
>>>>>> --- a/generic/include/clc/clc.h
>>>>>> +++ b/generic/include/clc/clc.h
>>>>>> @@ -173,6 +173,7 @@
>>>>>> #include <clc/relational/isordered.h>
>>>>>> #include <clc/relational/isunordered.h>
>>>>>> #include <clc/relational/select.h>
>>>>>> +#include <clc/relational/shuffle.h>
>>>>>
>>>>> Not sure why CTS puts these in relational category. specs have a misc
>>>>> chapter for them, so it'd be nice to add new dir in clc.
>>>>>
>>>>>> #include <clc/relational/signbit.h>
>>>>>>
>>>>>> /* 6.11.8 Synchronization Functions */
>>>>>> diff --git a/generic/include/clc/relational/shuffle.h b/generic/include/clc/relational/shuffle.h
>>>>>> new file mode 100644
>>>>>> index 0000000..e10ac5e
>>>>>> --- /dev/null
>>>>>> +++ b/generic/include/clc/relational/shuffle.h
>>>>>> @@ -0,0 +1,44 @@
>>>>>> +//===-- generic/include/clc/relational/shuffle.h ------------------------------===//
>>>>>> +//
>>>>>> +// The LLVM Compiler Infrastructure
>>>>>> +//
>>>>>> +// This file is dual licensed under both the University of Illinois Open Source
>>>>>> +// License and the MIT license. See LICENSE.TXT for details.
>>>>>> +//
>>>>>> +//===----------------------------------------------------------------------===//
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_DECL(TYPE, MASKTYPE, RETTYPE) \
>>>>>> + _CLC_OVERLOAD _CLC_DECL RETTYPE shuffle(TYPE x, MASKTYPE mask);
>>>>>> +
>>>>>> +//Return type is same base type as the input type, with the same vector size as the mask.
>>>>>> +//Elements in the mask must be the same size (number of bits) as the input value.
>>>>>> +//E.g. char8 ret = shuffle(char2 x, uchar8 mask);
>>>>>> +
>>>>>> +#define _CLC_VECTOR_SHUFFLE_MASKSIZE(INBASE, INTYPE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_DECL(INTYPE, MASKTYPE##2, INBASE##2) \
>>>>>> + _CLC_SHUFFLE_DECL(INTYPE, MASKTYPE##4, INBASE##4) \
>>>>>> + _CLC_SHUFFLE_DECL(INTYPE, MASKTYPE##8, INBASE##8) \
>>>>>> + _CLC_SHUFFLE_DECL(INTYPE, MASKTYPE##16, INBASE##16) \
>>>>>> +
>>>>>> +#define _CLC_VECTOR_SHUFFLE_INSIZE(TYPE, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, TYPE##2, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, TYPE##4, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, TYPE##8, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, TYPE##16, MASKTYPE) \
>>>>>> +
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(char, uchar)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(short, ushort)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(int, uint)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(long, ulong)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(uchar, uchar)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(ushort, ushort)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(uint, uint)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(ulong, ulong)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(float, uint)
>>>>>> +#ifdef cl_khr_fp64
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(double, ulong)
>>>>>> +#endif
>>>>>> +
>>>>>> +#undef _CLC_SHUFFLE_DECL
>>>>>> +#undef _CLC_VECTOR_SHUFFLE_MASKSIZE
>>>>>> +#undef _CLC_VECTOR_SHUFFLE_INSIZE
>>>>>> diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
>>>>>> index 9e0157b..fe0df5a 100644
>>>>>> --- a/generic/lib/SOURCES
>>>>>> +++ b/generic/lib/SOURCES
>>>>>> @@ -139,6 +139,7 @@ relational/isnormal.cl
>>>>>> relational/isnotequal.cl
>>>>>> relational/isordered.cl
>>>>>> relational/isunordered.cl
>>>>>> +relational/shuffle.cl
>>>>>> relational/signbit.cl
>>>>>> shared/clamp.cl
>>>>>> shared/max.cl
>>>>>> diff --git a/generic/lib/relational/shuffle.cl b/generic/lib/relational/shuffle.cl
>>>>>> new file mode 100644
>>>>>> index 0000000..7d96f86
>>>>>> --- /dev/null
>>>>>> +++ b/generic/lib/relational/shuffle.cl
>>>>>> @@ -0,0 +1,153 @@
>>>>>> +//===-- generic/lib/relational/shuffle.cl ------------------------------===//
>>>>>> +//
>>>>>> +// The LLVM Compiler Infrastructure
>>>>>> +//
>>>>>> +// This file is dual licensed under both the University of Illinois Open Source
>>>>>> +// License and the MIT license. See LICENSE.TXT for details.
>>>>>> +//
>>>>>> +//===----------------------------------------------------------------------===//
>>>>>> +
>>>>>> +#include <clc/clc.h>
>>>>>> +
>>>>>> +#define _CLC_ELEMENT_CASES2(VAR) \
>>>>>> + case 0: return VAR.s0; \
>>>>>> + case 1: return VAR.s1;
>>>>>> +
>>>>>> +#define _CLC_ELEMENT_CASES4(VAR) \
>>>>>> + _CLC_ELEMENT_CASES2(VAR) \
>>>>>> + case 2: return VAR.s2; \
>>>>>> + case 3: return VAR.s3;
>>>>>> +
>>>>>> +#define _CLC_ELEMENT_CASES8(VAR) \
>>>>>> + _CLC_ELEMENT_CASES4(VAR) \
>>>>>> + case 4: return VAR.s4; \
>>>>>> + case 5: return VAR.s5; \
>>>>>> + case 6: return VAR.s6; \
>>>>>> + case 7: return VAR.s7;
>>>>>> +
>>>>>> +#define _CLC_ELEMENT_CASES16(VAR) \
>>>>>> + _CLC_ELEMENT_CASES8(VAR) \
>>>>>> + case 8: return VAR.s8; \
>>>>>> + case 9: return VAR.s9; \
>>>>>> + case 10: return VAR.sA; \
>>>>>> + case 11: return VAR.sB; \
>>>>>> + case 12: return VAR.sC; \
>>>>>> + case 13: return VAR.sD; \
>>>>>> + case 14: return VAR.sE; \
>>>>>> + case 15: return VAR.sF;
>>>>>> +
>>>>>> +#define _CLC_GET_ELEMENT_DEFINE(ARGTYPE, ARGSIZE, IDXTYPE) \
>>>>>> + inline ARGTYPE __clc_get_el_##ARGTYPE##ARGSIZE##_##IDXTYPE(ARGTYPE##ARGSIZE x, IDXTYPE idx) {\
>>>>>> + switch (idx){ \
>>>>>
>>>>> I think you need "idx % #ARGSIZE" here. Specs explitcilty mention that
>>>>> higher bits are ignored and the newly posted piglit tests check this.
>>>>>
>>>>>> + _CLC_ELEMENT_CASES##ARGSIZE(x) \
>>>>>> + default: return 0; \
>>>>>> + } \
>>>>>> + } \
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_SET_ONE_ELEMENT(ARGTYPE, ARGSIZE, INDEX, MASKTYPE) \
>>>>>> + ret_val.s##INDEX = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s##INDEX); \
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_SET_2_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + ret_val.s0 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s0); \
>>>>>> + ret_val.s1 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s1);
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_SET_4_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_SET_2_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + ret_val.s2 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s2); \
>>>>>> + ret_val.s3 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s3);
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_SET_8_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_SET_4_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + ret_val.s4 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s4); \
>>>>>> + ret_val.s5 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s5); \
>>>>>> + ret_val.s6 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s6); \
>>>>>> + ret_val.s7 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s7);
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_SET_16_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_SET_8_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + ret_val.s8 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s8); \
>>>>>> + ret_val.s9 = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.s9); \
>>>>>> + ret_val.sA = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sA); \
>>>>>> + ret_val.sB = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sB); \
>>>>>> + ret_val.sC = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sC); \
>>>>>> + ret_val.sD = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sD); \
>>>>>> + ret_val.sE = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sE); \
>>>>>> + ret_val.sF = __clc_get_el_##ARGTYPE##ARGSIZE##_##MASKTYPE(x, mask.sF); \
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_DEFINE2(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> +_CLC_DEF _CLC_OVERLOAD ARGTYPE##2 shuffle(ARGTYPE##ARGSIZE x, MASKTYPE##2 mask){ \
>>>>>> + ARGTYPE##2 ret_val; \
>>>>>> + mask &= (MASKTYPE##2)(ARGSIZE-1); \
>>>>>> + _CLC_SHUFFLE_SET_2_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + return ret_val; \
>>>>>> +}
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_DEFINE4(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> +_CLC_DEF _CLC_OVERLOAD ARGTYPE##4 shuffle(ARGTYPE##ARGSIZE x, MASKTYPE##4 mask){ \
>>>>>> + ARGTYPE##4 ret_val; \
>>>>>> + mask &= (MASKTYPE##4)(ARGSIZE-1); \
>>>>>> + _CLC_SHUFFLE_SET_4_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + return ret_val; \
>>>>>> +}
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_DEFINE8(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> +_CLC_DEF _CLC_OVERLOAD ARGTYPE##8 shuffle(ARGTYPE##ARGSIZE x, MASKTYPE##8 mask){ \
>>>>>> + ARGTYPE##8 ret_val; \
>>>>>> + mask &= (MASKTYPE##8)(ARGSIZE-1); \
>>>>>> + _CLC_SHUFFLE_SET_8_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + return ret_val; \
>>>>>> +}
>>>>>> +
>>>>>> +#define _CLC_SHUFFLE_DEFINE16(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> +_CLC_DEF _CLC_OVERLOAD ARGTYPE##16 shuffle(ARGTYPE##ARGSIZE x, MASKTYPE##16 mask){ \
>>>>>> + ARGTYPE##16 ret_val; \
>>>>>> + mask &= (MASKTYPE##16)(ARGSIZE-1); \
>>>>>> + _CLC_SHUFFLE_SET_16_ELEMENTS(ARGTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + return ret_val; \
>>>>>> +}
>>>>>> +
>>>>>> +#define _CLC_VECTOR_SHUFFLE_MASKSIZE(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_GET_ELEMENT_DEFINE(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_DEFINE2(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_DEFINE4(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_DEFINE8(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> + _CLC_SHUFFLE_DEFINE16(INTYPE, ARGSIZE, MASKTYPE) \
>>>>>> +
>>>>>> +#define _CLC_VECTOR_SHUFFLE_INSIZE(TYPE, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, 2, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, 4, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, 8, MASKTYPE) \
>>>>>> + _CLC_VECTOR_SHUFFLE_MASKSIZE(TYPE, 16, MASKTYPE) \
>>>>>> +
>>>>>> +
>>>>>> +
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(char, uchar)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(short, ushort)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(int, uint)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(long, ulong)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(uchar, uchar)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(ushort, ushort)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(uint, uint)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(ulong, ulong)
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(float, uint)
>>>>>
>>>>> Mask type can be any vector of unsigned type, so I think you need all
>>>>> combinations.
>>>>>
>>>>>> +#ifdef cl_khr_fp64
>>>>>> +#pragma OPENCL EXTENSION cl_khr_fp64 : enable
>>>>>> +_CLC_VECTOR_SHUFFLE_INSIZE(double, ulong)
>>>>>
>>>>> I think this needs other mask types.
>>>>>
>>>>>> +#endif
>>>>>
>>>>> add half/cl_khr_fp16 here.
>>>>>
>>>>> thanks,
>>>>> Jan
>>>>>
>>>>>> +
>>>>>> +#undef _CLC_ELEMENT_CASES2
>>>>>> +#undef _CLC_ELEMENT_CASES4
>>>>>> +#undef _CLC_ELEMENT_CASES8
>>>>>> +#undef _CLC_ELEMENT_CASES16
>>>>>> +#undef _CLC_GET_ELEMENT_DEFINE
>>>>>> +#undef _CLC_SHUFFLE_SET_ONE_ELEMENT
>>>>>> +#undef _CLC_SHUFFLE_SET_2_ELEMENTS
>>>>>> +#undef _CLC_SHUFFLE_SET_4_ELEMENTS
>>>>>> +#undef _CLC_SHUFFLE_SET_8_ELEMENTS
>>>>>> +#undef _CLC_SHUFFLE_SET_16_ELEMENTS
>>>>>> +#undef _CLC_SHUFFLE_DEFINE2
>>>>>> +#undef _CLC_SHUFFLE_DEFINE4
>>>>>> +#undef _CLC_SHUFFLE_DEFINE8
>>>>>> +#undef _CLC_SHUFFLE_DEFINE16
>>>>>> +#undef _CLC_VECTOR_SHUFFLE_MASKSIZE
>>>>>> +#undef _CLC_VECTOR_SHUFFLE_INSIZE
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