[LLVMbugs] [Bug 13336] New: ARM NEON intrinsic vshlq_n_u64 fail on shifts over 7.
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Wed Jul 11 14:26:55 PDT 2012
http://llvm.org/bugs/show_bug.cgi?id=13336
Bug #: 13336
Summary: ARM NEON intrinsic vshlq_n_u64 fail on shifts over 7.
Product: clang
Version: 3.1
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Headers
AssignedTo: unassignedclangbugs at nondot.org
ReportedBy: ted at krovetz.net
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
Compiling
#include <arm_neon.h>
void foo()
{
uint64x2_t x = {1,1};
x = vshlq_n_u64(x,32);
}
gives the error "test.c:5:9: error: argument should be a value from 0 to 7"
indicating that a shift of 32 is illegal whereas
#include <arm_neon.h>
void foo()
{
uint64x1_t x = {1};
x = vshlq_n_u64(x,32);
}
works just fine. Both codes work as expected under GCC. Similar behavior is
seen when using vshrq_n_u64 too.
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