keil中的混合编程

[Trehe]

#define ABSDIFF(frame1, frame2) \
({ \
 int result = 0; \
 asm volatile( \
  "mov %[result], #0\n"           /* accumulator */ \
 \
  "ldr r4, [%[src], #0]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #0]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #4]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #4]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 1)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 1)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 1 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 1 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 2)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 2)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 2 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 2 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 3)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 3)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 3 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 3 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 4)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 4 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 4 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 5)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 5)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 5 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 5 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 6)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 6)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 6 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 6 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  "ldr r4, [%[src], #(64 * 7)]\n"        /* read data from address + offset*/ \
  "ldr r5, [%[dst], #(64 * 7)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
  "ldr r4, [%[src], #(64 * 7 + 4)]\n"        /* read data from address + offset */ \
  "ldr r5, [%[dst], #(64 * 7 + 4)]\n" \
  "usada8 %[result], r4, r5, %[result]\n"      /* difference */ \
 \
  : [result] "+r" (result) \
  : [src] "r" (frame1), [dst] "r" (frame2) \
  : "r4", "r5" \
  ); \
  \
 result; \
})

小弟在移植一段代码，主控芯片是STM32F407，中间有一段汇编代码，如上，是一个宏定义，然后在下边调用，出现这样的错误error: #29: expected an expression uint32_t temp_dist = ABSDIFF(base1, base2+ii);
请教大神该怎么解决

[Trehe]

自顶！！！！！！！！！！

[Aobilage]

能请教一下下面每段代码的含义么？ "ldr r4, [%[src], #(64 * 1)]\n" /* read data from address + offset*/ \ "ldr r5, [%[dst], #(64 * 1)]\n" \ "usada8 %[result], r4, r5, %[result]\n" /* difference */ \ "ldr r4, [%[src], #(64 * 1 + 4)]\n" /* read data from address + offset */ \ "ldr r5, [%[dst], #(64 * 1 + 4)]\n" \ "usada8 %[result], r4, r5, %[result]\n" /* difference */ \ 求大神解答！！！！