fork download 
  1. static inline uint16_t mul_8_8 (uint8_t op1, uint8_t op2)
  2. {
  3.     uint16_t res;
  4.  
  5.     asm(
  6.         "mul %A[op1],%A[op2]\n"
  7.         "movw %A[res],r0\n"
  8.         "clr __zero_reg__\n"
  9.  
  10.         : [res] "=&r" (res)
  11.         : [op1] "a" (op1),
  12.           [op2] "a" (op2)
  13.     );
  14.  
  15.     return res;
  16. }
  17.  
  18. static inline __uint24 mul_16_8 (uint16_t op1, uint8_t op2)
  19. {
  20.     __uint24 res;
  21.     uint8_t zero;
  22.  
  23.     asm(
  24.         "clr %[zero]\n"
  25.         "mul %A[op1],%A[op2]\n"
  26.         "movw %A[res],r0\n"
  27.         "mul %B[op1],%A[op2]\n"
  28.         "add %B[res],r0\n"
  29.         "adc %C[res],r1\n"
  30.         "clr __zero_reg__\n"
  31.         : [res] "=&r" (res),
  32.           [zero] "=&r" (zero)
  33.         : [op1] "a" (op1),
  34.           [op2] "a" (op2)
  35.     );
  36.  
  37.     return res;
  38. }
  39.  
  40. static inline uint32_t mul_16_16 (uint16_t op1, uint16_t op2)
  41. {
  42.     uint32_t res;
  43.     uint8_t zero;
  44.  
  45.     asm(
  46.         "clr %[zero]\n"
  47.         "mul %A[op1],%A[op2]\n"
  48.         "movw %A[res],r0\n"
  49.         "mul %B[op1],%B[op2]\n"
  50.         "movw %C[res],r0\n"
  51.         "mul %B[op1],%A[op2]\n"
  52.         "add %B[res],r0\n"
  53.         "adc %C[res],r1\n"
  54.         "adc %D[res],%[zero]\n"
  55.         "mul %A[op1],%B[op2]\n"
  56.         "add %B[res],r0\n"
  57.         "adc %C[res],r1\n"
  58.         "adc %D[res],%[zero]\n"
  59.         "clr __zero_reg__\n"
  60.         : [res] "=&r" (res),
  61.           [zero] "=&r" (zero)
  62.         : [op1] "a" (op1),
  63.           [op2] "a" (op2)
  64.     );
  65.  
  66.     return res;
  67. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.c:1:1: error: unknown type name ‘uint16_t’
 static inline uint16_t mul_8_8 (uint8_t op1, uint8_t op2)
 ^
prog.c:1:33: error: unknown type name ‘uint8_t’
 static inline uint16_t mul_8_8 (uint8_t op1, uint8_t op2)
                                 ^
prog.c:1:46: error: unknown type name ‘uint8_t’
 static inline uint16_t mul_8_8 (uint8_t op1, uint8_t op2)
                                              ^
prog.c:18:1: error: unknown type name ‘__uint24’
 static inline __uint24 mul_16_8 (uint16_t op1, uint8_t op2)
 ^
prog.c:18:34: error: unknown type name ‘uint16_t’
 static inline __uint24 mul_16_8 (uint16_t op1, uint8_t op2)
                                  ^
prog.c:18:48: error: unknown type name ‘uint8_t’
 static inline __uint24 mul_16_8 (uint16_t op1, uint8_t op2)
                                                ^
prog.c:40:1: error: unknown type name ‘uint32_t’
 static inline uint32_t mul_16_16 (uint16_t op1, uint16_t op2)
 ^
prog.c:40:35: error: unknown type name ‘uint16_t’
 static inline uint32_t mul_16_16 (uint16_t op1, uint16_t op2)
                                   ^
prog.c:40:49: error: unknown type name ‘uint16_t’
 static inline uint32_t mul_16_16 (uint16_t op1, uint16_t op2)
                                                 ^
stdout 
Standard output is empty
https://ideone.com/JH0rtg
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!