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libgcc: Use UTItype with mode(TI) for 16-byte atomics

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The use of UOItype with mode(OI) for 16-byte atomic operations is
non-standard. The OI mode is not defined in machmode.def and exists
only as an ad-hoc construct in libgcc/sync.c.

This patch replaces it with UTItype using mode(TI), which is the
standard GCC machine mode for 16-byte integers (Tetra Integer).
The size argument is also corrected from 8 to 16 to match the actual
operand width.

libgcc/ChangeLog:
	* sync.c: Replace UOItype with UTItype and use mode(TI) pass 16, not
	8, to DEFINE macro.

Signed-off-by: Xin Wang <wangxinw@hygon.cn>
This commit is contained in:
Xin Wang
2026-01-24 23:54:46 +00:00
committed by Richard Sandiford
parent 8b7b9d5a0a
commit 022cfc9137
1 changed files with 5 additions and 6 deletions
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11
libgcc/sync.c
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@@ -124,10 +124,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
/* Find an appropriate type TYPE for SIZE and invoke DEFINE (FN, SIZE, TYPE).
The types chosen here may be incorrect for some targets.
For example, targets with 16-byte atomicity support might not
support OImode. We would need some kind of target-specific
override if that becomes a problem. */
The types chosen here are based on standard GCC modes.
If a target supports atomic operations for a given SIZE but lacks
the corresponding mode, a target-specific override will be needed. */
#if SIZE == 1 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
@@ -151,8 +150,8 @@ DEFINE (FN, 8, UDItype)
#elif SIZE == 16 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
typedef unsigned int UOItype __attribute__((mode (OI)));
DEFINE (FN, 8, UOItype)
typedef unsigned int UTItype __attribute__((mode (TI)));
DEFINE (FN, 16, UTItype)
#endif