[newlib-cygwin/main] RISC-V: memcpy() Use uintxlen_t for xlen-sized copy

[Kito Cheng]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=bae30cdd59735dd00836c590178a866caefc89d6

commit bae30cdd59735dd00836c590178a866caefc89d6
Author: Mahmoud Abumandour <ma.mandourr@gmail.com>
Date:   Sun Apr 27 04:58:24 2025 -0700

    RISC-V: memcpy() Use uintxlen_t for xlen-sized copy
    
    Reviewed-by: Christian Herber <christian.herber@oss.nxp.com>
    Signed-off-by: Mahmoud Abumandour <ma.mandourr@gmail.com>

Diff:
---
 newlib/libc/machine/riscv/memcpy.c | 71 +++++++++++++++++++-------------------
 1 file changed, 36 insertions(+), 35 deletions(-)

diff --git a/newlib/libc/machine/riscv/memcpy.c b/newlib/libc/machine/riscv/memcpy.c
index e1a34a8c8..7df35dd85 100644
--- a/newlib/libc/machine/riscv/memcpy.c
+++ b/newlib/libc/machine/riscv/memcpy.c
@@ -10,18 +10,20 @@
 */
 
 #if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
-//memcpy defined in memcpy-asm.S
+// memcpy defined in memcpy-asm.S
 #else
 
-#include <string.h>
-#include <stdint.h>
 #include "../../string/local.h"
+#include "xlenint.h"
+#include <stdint.h>
+#include <string.h>
+#include <sys/asm.h>
 
 #define unlikely(X) __builtin_expect (!!(X), 0)
 
 void *
 __inhibit_loop_to_libcall
-memcpy(void *__restrict aa, const void *__restrict bb, size_t n)
+memcpy (void *__restrict aa, const void *__restrict bb, size_t n)
 {
   #define BODY(a, b, t) { \
     t tt = *b; \
@@ -32,18 +34,17 @@ memcpy(void *__restrict aa, const void *__restrict bb, size_t n)
   char *a = (char *)aa;
   const char *b = (const char *)bb;
   char *end = a + n;
-  uintptr_t msk = sizeof (long) - 1;
+  uintptr_t msk = SZREG - 1;
 #if __riscv_misaligned_slow || __riscv_misaligned_fast
-  if (n < sizeof (long))
+  if (n < SZREG)
 #else
-  if (unlikely ((((uintptr_t)a & msk) != ((uintptr_t)b & msk))
-	       || n < sizeof (long)))
+  if (unlikely ((((uintptr_t)a & msk) != ((uintptr_t)b & msk)) || n < SZREG))
 #endif
     {
-small:
+    small:
       if (__builtin_expect (a < end, 1))
-	while (a < end)
-	  BODY (a, b, char);
+        while (a < end)
+          BODY (a, b, char);
       return aa;
     }
 
@@ -51,37 +52,37 @@ small:
     while ((uintptr_t)a & msk)
       BODY (a, b, char);
 
-  long *la = (long *)a;
-  const long *lb = (const long *)b;
-  long *lend = (long *)((uintptr_t)end & ~msk);
+  uintxlen_t *la = (uintxlen_t *)a;
+  const uintxlen_t *lb = (const uintxlen_t *)b;
+  uintxlen_t *lend = (uintxlen_t *)((uintptr_t)end & ~msk);
 
   if (unlikely (lend - la > 8))
     {
       while (lend - la > 8)
-	{
-	  long b0 = *lb++;
-	  long b1 = *lb++;
-	  long b2 = *lb++;
-	  long b3 = *lb++;
-	  long b4 = *lb++;
-	  long b5 = *lb++;
-	  long b6 = *lb++;
-	  long b7 = *lb++;
-	  long b8 = *lb++;
-	  *la++ = b0;
-	  *la++ = b1;
-	  *la++ = b2;
-	  *la++ = b3;
-	  *la++ = b4;
-	  *la++ = b5;
-	  *la++ = b6;
-	  *la++ = b7;
-	  *la++ = b8;
-	}
+        {
+          uintxlen_t b0 = *lb++;
+          uintxlen_t b1 = *lb++;
+          uintxlen_t b2 = *lb++;
+          uintxlen_t b3 = *lb++;
+          uintxlen_t b4 = *lb++;
+          uintxlen_t b5 = *lb++;
+          uintxlen_t b6 = *lb++;
+          uintxlen_t b7 = *lb++;
+          uintxlen_t b8 = *lb++;
+          *la++ = b0;
+          *la++ = b1;
+          *la++ = b2;
+          *la++ = b3;
+          *la++ = b4;
+          *la++ = b5;
+          *la++ = b6;
+          *la++ = b7;
+          *la++ = b8;
+        }
     }
 
   while (la < lend)
-    BODY (la, lb, long);
+    BODY (la, lb, uintxlen_t);
 
   a = (char *)la;
   b = (const char *)lb;