diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2020-02-04 12:51:21 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2020-02-04 21:57:05 -0800 |
| commit | c74c0fd2282e0e3ce891cb571f325b9412cbaa3f (patch) | |
| tree | 2b96dba5a0c3ba4f9874fd902766f4b922456e4e /arch/xtensa | |
| parent | 5e4417f921238b5acf101bfcd59a7b3463fb2dbd (diff) | |
xtensa: ISS: improve simcall assembly
Drop redundant result moving from inline assembly, use a1 and b1 values
as return value and errno value respectively.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/platforms/iss/include/platform/simcall.h | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/xtensa/platforms/iss/include/platform/simcall.h b/arch/xtensa/platforms/iss/include/platform/simcall.h index 2ba45858e50a..111bcc5d0dc0 100644 --- a/arch/xtensa/platforms/iss/include/platform/simcall.h +++ b/arch/xtensa/platforms/iss/include/platform/simcall.h @@ -66,19 +66,17 @@ static int errno; static inline int __simc(int a, int b, int c, int d) { - int ret; register int a1 asm("a2") = a; register int b1 asm("a3") = b; register int c1 asm("a4") = c; register int d1 asm("a5") = d; __asm__ __volatile__ ( "simcall\n" - "mov %0, a2\n" - "mov %1, a3\n" - : "=a" (ret), "=a" (errno), "+r"(a1), "+r"(b1) + : "+r"(a1), "+r"(b1) : "r"(c1), "r"(d1) : "memory"); - return ret; + errno = b1; + return a1; } static inline int simc_exit(int exit_code) |