When I try to build a ppc64 target on a ppc64 host (gcc 8.1.1), I have:
.../target/ppc/int_helper.c: In function 'helper_vinsertb':
.../target/ppc/int_helper.c:1954:32: error: array subscript
18446744073709551608 is above array bounds of 'uint8_t[16]' {aka 'unsigned
char[16]'} [-Werror=array-bounds]
memmove(&r->u8[index], &b->u8[8 - sizeof(r->element)], \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.../target/ppc/int_helper.c:1965:1: note: in expansion of macro 'VINSERT'
If we compare with the macro for ppc64le, we can see
sizeof(r->element[0]) should be used instead of sizeof(r->element).
And VINSERT uses only u8, u16, u32 and u64, so the maximum value
of sizeof(r->element[0]) is 8
Suggested-by: Dr. David Alan Gilbert <dgilb...@redhat.com>
Signed-off-by: Laurent Vivier <laur...@vivier.eu>
---
target/ppc/int_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/ppc/int_helper.c b/target/ppc/int_helper.c
index 03d37da79f..d52338ed71 100644
--- a/target/ppc/int_helper.c
+++ b/target/ppc/int_helper.c
@@ -1951,7 +1951,7 @@ VSPLT(w, u32)
#define VINSERT(suffix, element) \
void helper_vinsert##suffix(ppc_avr_t *r, ppc_avr_t *b, uint32_t index) \
{ \
- memmove(&r->u8[index], &b->u8[8 - sizeof(r->element)], \
+ memmove(&r->u8[index], &b->u8[8 - sizeof(r->element[0])], \
sizeof(r->element[0])); \
}
#else
--
2.17.1
