ARCv2: lib: memset: Don't assume 64-bit load/stores

There are configurations which may not have LDD/STD

Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/lib/memset-archs.S b/arch/arc/lib/memset-archs.S
index 92d573c..365b183 100644 (file)
--- a/arch/arc/lib/memset-archs.S
+++ b/arch/arc/lib/memset-archs.S
@@ -10,12 +10,6 @@
 
 #undef PREALLOC_NOT_AVAIL
 
-#ifdef PREALLOC_NOT_AVAIL
-#define PREWRITE(A,B)  prefetchw [(A),(B)]
-#else
-#define PREWRITE(A,B)  prealloc [(A),(B)]
-#endif
-
 ENTRY(memset)
        prefetchw [r0]          ; Prefetch the write location
        mov.f   0, r2
@@ -51,9 +45,15 @@ ENTRY(memset)
 
 ;;; Convert len to Dwords, unfold x8
        lsr.f   lp_count, lp_count, 6
+
        lpnz    @.Lset64bytes
        ;; LOOP START
-       PREWRITE(r3, 64)        ;Prefetch the next write location
+#ifdef PREALLOC_NOT_AVAIL
+       prefetchw [r3, 64]      ;Prefetch the next write location
+#else
+       prealloc  [r3, 64]
+#endif
+#ifdef CONFIG_ARC_HAS_LL64
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
@@ -62,16 +62,45 @@ ENTRY(memset)
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
+#else
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+#endif
 .Lset64bytes:
 
        lsr.f   lp_count, r2, 5 ;Last remaining  max 124 bytes
        lpnz    .Lset32bytes
        ;; LOOP START
        prefetchw   [r3, 32]    ;Prefetch the next write location
+#ifdef CONFIG_ARC_HAS_LL64
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
        std.ab  r4, [r3, 8]
+#else
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+       st.ab   r4, [r3, 4]
+#endif
 .Lset32bytes:
 
        and.f   lp_count, r2, 0x1F ;Last remaining 31 bytes