Когда я встраивал ассемблер в язык C, я встретил следующую ошибку при компиляции этого кода с помощью команды оболочки в ubuntu linux 14.04.
IFR_temp_measure.cpp: In function ‘void BlockTempClc(char*, char*,
int, int, char, int, int, int, int*, int, int*, int)’:
IFR_temp_measure.cpp:1843:6: error: ‘asm’ operand has impossible
constraints);
^
&make: *** [IFR_temp_measure.o] Error 1
или позиция строки кода ошибки 1842,1843 соответствуетк коду
:"cc", "memory","q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q10", "q11", "q12", "q13", "q14", "q15","r0", "r1", "r3", "r4", "r5","r6","r8", "r9", "r10", "r12"
);
Я пытался решить эту проблему, но в Интернете доступно несколько ссылок , есть компоновщик: Встроенная сборка Gcc, что означает, что операнд «asm» имеет невозможные ограничения »означает? и http://www.ethernut.de/en/documents/arm-inline-asm.html но не помогло.Мой код выглядит следующим образом:
void BlockTempClc(char* src1,char* src2,int StrideDist,int height,char temp_comp1,int numofiterations,int temp_comp2,int temp_comp3,int *dstData,int width,int *dstSum,int step)
{
volatile char array1[16] = {0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0};
volatile char array2[16] = {0,0,1,0,2,0,3,0,
4,0,5,0,6,0,7,0};
asm volatile(
"mov r0, %0; " //image[0]
"mov r1, %1; " //image[1]
"mov r12,%11; " //m
"mov r3, %4; " //n
"mov r4, %2; " //store data
"mov r8, %12; " //step down for loading next line of image
"mov r5, %6; " //numofiterations
"mov r6, %3; " //out
"mov.8 r9,%5;"//isp_temp_comp
"mov.8 r10,%7;"//led_temp_comp
"mov.8 r11,%8;"//fac_temp_comp
"vdup.8 d20,r9;"//copy arm register value isp_temp_comp to neon register
"VMOV.S16 q9, d20; " //isp_temp_comp transfer to signed short type
"VLD1.8 {d16,d17}, [%9];"//q8 array1 sum
"VLD1.8 {d6,d7}, [%10];"//q3 array2
"VMOV.S16 q0, #256; "
"VMOV.S16 q1, #2730; " //Assign immediate number 2730 to each 16 bits of d1
".loop:;"
"vdup.8 d21,r10;"//copy arm register value led_temp_comp to neon register
"vdup.8 d22,r11;"//copy arm register value fac_temp_comp to neon register
"VLD1.8 d14, [r1],r8; " // q7 *(image[1] + tmp + n) Load: Load Picture Pixels r6:move step ?
"VLD1.8 d15, [r0],r8 " // *(image[0] + tmp + n) Load: Load Picture Pixels
"PLD [r1]; " //Preload: one line in cache
"PLD [r0]; " //?
"VMOV.S16 q5, d14; " //q5 8*16 transfer to signed short type:*(image[1] + tmp + n)
"VMOV.S16 q6, d15; " //q6 8*16 transfer to signed short type : *(image[0] + tmp + n)
"VADD.S16 q12,q6, q9;"//*(image[0] + tmp + n) + isp_temp_comp
"VMOV.S16 q6, d21; " //led_temp_comp
"VADD.S16 q13,q12, q6;"//*(image[0] + tmp + n) + isp_temp_comp+ + led_temp_comp
"VMOV.S16 q6, d22; " //fac_temp_comp
"VADD.S16 q14,q13, q6;"//*(image[0] + tmp + n) + isp_temp_comp+ + led_temp_comp+ fac_temp_comp
"VSUB.S16 q15,q14, q1;"//*(image[0] + tmp + n) + isp_temp_comp+ + led_temp_comp+ fac_temp_comp-2730
"VMLA.S16 q15, q5, q0;"//img_temp[m][n]=*(image[0] + tmp + n) + isp_temp_comp+ + led_temp_comp+ fac_temp_comp-2730+*(image[1] + tmp + n) *256
"VADD.S16 q2,q15, q8;"//sum
"VMOV.S16 q8, q2; " //q8
"vdup.8 d20,r3;"//n
"vdup.8 d21,r12;"//m
"VMOV.S16 q11, d20; " //n
"VMOV.S16 q10, d21; " //m
"VADD.S16 q4,q3, q11;"//(n,n+1,n+2,n+3,n+4,n+5,n+6,n+7)
"VADD.S16 q7,q3, q10;"//(m,m+1,m+2,m+3,m+4,m+5,m+6,m+7) q7
"VST1.16 {d30[0]}, [r4]!; "//restore img_temp[m][n] to pointer data
"VST1.16 {d14[0]}, [r4]!; "//restore m
"VST1.16 {d8[0]}, [r4]!; " //restore n
"VST1.16 {d30[1]}, [r4]!; "
"VST1.16 {d14[1]}, [r4]!; "
"VST1.16 {d8[1]}, [r4]!; "
"VST1.16 {d30[2]}, [r4]!; "
"VST1.16 {d14[2]}, [r4]!; "
"VST1.16 {d8[2]}, [r4]!; "
"VST1.16 {d30[3]}, [r4]!; "
"VST1.16 {d14[3]}, [r4]!; "
"VST1.16 {d8[3]}, [r4]!; "//response to array
"subs r5, r5, #1; " // decrement: numofinteration -= 1;
"bne .loop; " // Branch If Not Zero; to .loop
"VST1.16 {d4[0]}, [r6]!; "//q2 refer to sum restore the final result to pointer out
"VST1.16 {d4[1]}, [r6]!; "
"VST1.16 {d4[2]}, [r6]!; "
"VST1.16 {d4[3]}, [r6]!; "
"VST1.16 {d5[0]}, [r6]!; "
"VST1.16 {d5[1]}, [r6]!; "
"VST1.16 {d5[2]}, [r6]!; "
"VST1.16 {d5[3]}, [r6]!; "
:"+r"(src1),"+r"(src2),"+r"(dstData),"+r"(dstSum),"+r"(height)
:"r"(temp_comp1),"r"(numofiterations),"r"(temp_comp2),"r"(temp_comp3),
"r"(array1),"r"(array2), "r"(width),"r"(step)
:"cc", "memory","q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", "q10", "q11", "q12", "q13", "q14", "q15","r0", "r1", "r3", "r4", "r5","r6","r8", "r9", "r10", "r12"
);
}
Я полагаю, проблема может быть в выводе списков операндов или выводе списков операндов.Что является причиной ошибки моего кода? И как ее решить?