xxspltw.c (2037B)
1 #include <stdio.h> 2 #include <stdint.h> 3 #include <inttypes.h> 4 #include <assert.h> 5 6 #define WORD_A 0xAAAAAAAAUL 7 #define WORD_B 0xBBBBBBBBUL 8 #define WORD_C 0xCCCCCCCCUL 9 #define WORD_D 0xDDDDDDDDUL 10 11 #define DWORD_HI (WORD_A << 32 | WORD_B) 12 #define DWORD_LO (WORD_C << 32 | WORD_D) 13 14 #define TEST(HI, LO, UIM, RES) \ 15 do { \ 16 union { \ 17 uint64_t u; \ 18 double f; \ 19 } h = { .u = HI }, l = { .u = LO }; \ 20 /* \ 21 * Use a pair of FPRs to load the VSR avoiding insns \ 22 * newer than xxswapd. \ 23 */ \ 24 asm("xxmrghd 32, %0, %1\n\t" \ 25 "xxspltw 32, 32, %2\n\t" \ 26 "xxmrghd %0, 32, %0\n\t" \ 27 "xxswapd 32, 32\n\t" \ 28 "xxmrghd %1, 32, %1\n\t" \ 29 : "+f" (h.f), "+f" (l.f) \ 30 : "i" (UIM) \ 31 : "v0"); \ 32 printf("xxspltw(0x%016" PRIx64 "%016" PRIx64 ", %d) =" \ 33 " %016" PRIx64 "%016" PRIx64 "\n", HI, LO, UIM, \ 34 h.u, l.u); \ 35 assert(h.u == (RES)); \ 36 assert(l.u == (RES)); \ 37 } while (0) 38 39 int main(void) 40 { 41 TEST(DWORD_HI, DWORD_LO, 0, WORD_A << 32 | WORD_A); 42 TEST(DWORD_HI, DWORD_LO, 1, WORD_B << 32 | WORD_B); 43 TEST(DWORD_HI, DWORD_LO, 2, WORD_C << 32 | WORD_C); 44 TEST(DWORD_HI, DWORD_LO, 3, WORD_D << 32 | WORD_D); 45 return 0; 46 }