[llvm-bugs] [Bug 31329] New: _mm512_mask_i64gather_ps has incorrect signature

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=31329

            Bug ID: 31329
           Summary: _mm512_mask_i64gather_ps has incorrect signature
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Headers
          Assignee: unassignedclangbugs at nondot.org
          Reporter: wenzel.jakob at epfl.ch
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Hi,

according to Intel, the intrinsic has the following signature.

__m256 _mm512_mask_i64gather_ps (__m256 src, __mmask8 k, __m512i vindex, void
const* base_addr, int scale)

In particular, note that a void const * pointer is accepted for the 'base_addr'
argument.

However, in avf512intri.h we have

 8182 #define _mm512_i64gather_ps(index, addr, scale) __extension__ ({ \
 8183   (__m256)__builtin_ia32_gatherdiv16sf((__v8sf)_mm256_undefined_ps(), \
 8184                                        (float const *)(addr), \
 8185                                        (__v8di)(__m512i)(index),
(__mmask8)-1, 
 8186                                        (int)(scale)); })
 8187
 8188 #define _mm512_mask_i64gather_ps( __v1_old, __mask, __index,\
 8189                                   __addr, __scale) __extension__({\
 8190 __builtin_ia32_gatherdiv16sf ((__v8sf) __v1_old,\
 8191                               __addr,(__v8di) __index, __mask, __scale);\
 8192 })

Note how the _mm512_i64gather_ps intrinsic casts the argument to float const*,
while the _mm512_mask_i64gather_ps intrinsic does not.

In practice, this means that Clang quits with an type checker error message
when trying to invoke _mm512_mask_i64gather_ps with a void const* argument.

It would be great if this could be fixed!

Thanks,
Wenzel

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-bugs/attachments/20161209/7e0818d6/attachment.html>