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| author | Claudiu Zissulescu <claziss@gmail.com> | 2024-08-20 15:10:39 +0300 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2024-08-20 18:23:06 -0400 |
| commit | 3e9f6a005c8df720dbdd42bba92df8081ee722c2 (patch) | |
| tree | cbaa2bbd080b77c446fc0501183313a6c2084a87 | |
| parent | 2c46bffba0d2ed0b94af3b82a93a5a853b4725d2 (diff) | |
| download | newlib-3e9f6a005c8df720dbdd42bba92df8081ee722c2.zip newlib-3e9f6a005c8df720dbdd42bba92df8081ee722c2.tar.gz newlib-3e9f6a005c8df720dbdd42bba92df8081ee722c2.tar.bz2 | |
arc: Use __ARC_UNALIGNED__ compiler macro
Replace __ARC_ALIGNED_ACCESS__ macro with the compiler defined
macro __ARC_UNALIGNED__ and improve file comments.
Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>
| -rw-r--r-- | newlib/libc/machine/arc/memcpy-archs.S | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/newlib/libc/machine/arc/memcpy-archs.S b/newlib/libc/machine/arc/memcpy-archs.S index f30dafd..3c477a7 100644 --- a/newlib/libc/machine/arc/memcpy-archs.S +++ b/newlib/libc/machine/arc/memcpy-archs.S @@ -70,7 +70,21 @@ # define ZOLAND 0xF #endif -#ifdef __ARC_ALIGNED_ACCESS__ + +;;; MEMCPY copy memory regions +;;; Input arguments: +;;; r0 - output memory region +;;; r1 - input memory region +;;; r2 - size in bytes +;;; Returns: +;;; r0 - pointer to the first byte of the output region +;;; Clobber: +;;; r1, r2, r3, r4, r5, r6, r8r9, r10r11, lp_count + +#if !defined (__ARC_UNALIGNED__) + +;;; MEMCPY routine for the case when the CPU only accepts ALIGNED +;;; accesses to memory. ENTRY (memcpy) prefetch [r1] ; Prefetch the read location prefetchw [r0] ; Prefetch the write location @@ -268,6 +282,8 @@ ENDFUNC (memcpy) #else +;;; MEMCPY routine which is used by systems with unaligned memory +;;; accesses. This is the case for most of ARCHS CPU family. ENTRY(memcpy) prefetch [r1] ; Prefetch the read location prefetchw [r0] ; Prefetch the write location |