On 2/26/25 06:03, Alex Bennée wrote:
Clang complains:clang -O2 -m64 -mcx16 /home/alex/lsrc/qemu.git/tests/tcg/i386/test-i386-adcox.c -o test-i386-adcox -static /home/alex/lsrc/qemu.git/tests/tcg/i386/test-i386-adcox.c:32:26: error: invalid input constraint '0' in asm : "r" ((REG)-1), "0" (flags), "1" (out_adcx), "2" (out_adox)); ^ /home/alex/lsrc/qemu.git/tests/tcg/i386/test-i386-adcox.c:57:26: error: invalid input constraint '0' in asm : "r" ((REG)-1), "0" (flags), "1" (out_adcx), "2" (out_adox)); ^ 2 errors generated. Pointing out a numbered input constraint can't point to a read/write output [1]. Convert to a read-only input constraint to allow this. [1] https://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20101101/036036.html Signed-off-by: Alex Bennée <alex.ben...@linaro.org> Suggested-by: Daniel P. Berrangé <berra...@redhat.com> --- tests/tcg/i386/test-i386-adcox.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tests/tcg/i386/test-i386-adcox.c b/tests/tcg/i386/test-i386-adcox.c index 16169efff8..b56dbc00f2 100644 --- a/tests/tcg/i386/test-i386-adcox.c +++ b/tests/tcg/i386/test-i386-adcox.c @@ -28,7 +28,7 @@ void test_adox_adcx(uint32_t in_c, uint32_t in_o, REG adcx_operand, REG adox_ope "adox %3, %2;" "adcx %3, %1;" "pushf; pop %0" - : "+r" (flags), "+r" (out_adcx), "+r" (out_adox) + : "=r"(flags), "=r"(out_adcx), "=r"(out_adox) : "r" ((REG)-1), "0" (flags), "1" (out_adcx), "2" (out_adox));
Alternately, drop all of the matching constraints as redundant. That's what "+r" does, anyway. r~
