https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108443
Bug ID: 108443
Summary: arm: MVE wrongly re-interprets predicate constants
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: avieira at gcc dot gnu.org
Target Milestone: ---
compiling:
$ cat t.c
#include <arm_mve.h>
uint32x4_t foo (uint32_t *a)
{
mve_pred16_t p = 0x00cc;
return vldrwq_z_u32 (a, p);
}
with:
$ arm-none-eabi-gcc -march=armv8.1-m.main+mve -mfloat-abi=hard -O2 -S
will yield:
foo:
mov r3, #-4 @ movhi
vmsr p0, r3 @ movhi
vpst
vldrwt.32 q0, [r0]
bx lr
That leads to a P0 mask of 0xFFFC and not 0x00CC as it should be.
