https://bugs.llvm.org/show_bug.cgi?id=38628
Bug ID: 38628
Summary: arm_neon.h doesn't support vmull_p64 on aarch32
armv8-a+crypto
Product: clang
Version: unspecified
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Headers
Assignee: unassignedclangb...@nondot.org
Reporter: len...@cs.columbia.edu
CC: llvm-bugs@lists.llvm.org
According to the ARM C Language Extensions (version 2.1, section 12.3.13,
Crypto Intrinsics):
poly128_t vmull_p64 (poly64_t, poly64_t);
Performs widening polynomial multiplication on double-words low part. Available
on ARMv8 AArch32 and AArch64.
poly128_t vmull_high_p64 (poly64x2_t, poly64x2_t);
Performs widening polynomial multiplication on double-words high part.
Available on ARMv8 AArch32 and AArch64.
However, clang's arm_neon.h incorrectly restricts vmull_p64 support to AArch64
only. (Additionally, it does *not* restrict it to __ARM_FEATURE_CRYPTO).
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