CH592 memcpy

memcpy提速方法：

#define ALIGN_MASK       0x3
#define COPY32 *d32 = *s32; d32++; s32++;
#define COPY8 *d8 = *s8; d8++; s8++;
#define SET32(x) *d32 = x; d32++;
#define SET8(x) *d8 = x; d8++;
#define REPEAT8(expr) expr expr expr expr expr expr expr expr
typedef uintptr_t lv_uintptr_t;#define LV_ATTRIBUTE_FAST_MEM   __attribute__((section(".highcode")))//__attribute__((section(".highcode")))
LV_ATTRIBUTE_FAST_MEM void * lv_memcpy(void * dst, const void * src, size_t len)
{uint8_t * d8 = dst;const uint8_t * s8 = src;lv_uintptr_t d_align = (lv_uintptr_t)d8 & ALIGN_MASK;lv_uintptr_t s_align = (lv_uintptr_t)s8 & ALIGN_MASK;/*Byte copy for unaligned memories*/if(s_align != d_align) {while(len > 32) {REPEAT8(COPY8);REPEAT8(COPY8);REPEAT8(COPY8);REPEAT8(COPY8);len -= 32;}while(len) {COPY8len--;}return dst;}/*Make the memories aligned*/if(d_align) {d_align = ALIGN_MASK + 1 - d_align;while(d_align && len) {COPY8;d_align--;len--;}}uint32_t * d32 = (uint32_t *)d8;const uint32_t * s32 = (uint32_t *)s8;while(len > 32) {REPEAT8(COPY32)len -= 32;}while(len > 4) {COPY32;len -= 4;}d8 = (uint8_t *)d32;s8 = (const uint8_t *)s32;while(len) {COPY8len--;}return dst;
}

验证效果，4K字节传输花费116us。