RISC-V: Align part of functions to 4bytes.

Co-Authored by: Cooper-Qu

Author: bigmagic123

newlib/libc/machine/riscv/memcpy.c

@@ -19,7 +19,7 @@
 
 #define unlikely(X) __builtin_expect (!!(X), 0)
 
-void *
+__attribute__((aligned(4))) void *
 __inhibit_loop_to_libcall
 memcpy(void *__restrict aa, const void *__restrict bb, size_t n)
 {

newlib/libc/machine/riscv/memset.S

@@ -12,6 +12,7 @@
 .text
 .global memset
 .type	memset, @function
+.align  2
 memset:
 #if defined(PREFER_SIZE_OVER_SPEED) && defined(__OPTIMIZE_SIZE__)
   mv t1, a0

newlib/libc/machine/riscv/setjmp.S

@@ -14,6 +14,7 @@
 /* int setjmp (jmp_buf);  */
   .globl  setjmp
   .type   setjmp, @function
+  .align  2
 setjmp:
 	REG_S ra,  0*SZREG(a0)
 	REG_S s0,  1*SZREG(a0)

newlib/libc/machine/riscv/strcmp.S

@@ -21,6 +21,7 @@
 .text
 .globl strcmp
 .type  strcmp, @function
+.align  2
 strcmp:
 #if defined(PREFER_SIZE_OVER_SPEED) && defined(__OPTIMIZE_SIZE__)
 1:

newlib/libc/machine/riscv/strcpy.c

@@ -12,7 +12,7 @@
 #include <string.h>
 #include <stdint.h>
 
-char *strcpy(char *dst, const char *src)
+__attribute__((aligned(4))) char *strcpy(char *dst, const char *src)
 {
   char *dst0 = dst;
 

newlib/libc/machine/riscv/strlen.c

@@ -12,7 +12,7 @@
 #include <string.h>
 #include <stdint.h>
 
-size_t strlen(const char *str)
+__attribute__((aligned(4))) size_t strlen(const char *str)
 {
   const char *start = str;