#include <stdio.h> #include <stdint.h> #include <inttypes.h> #include <assert.h> #define WORD_A 0xAAAAAAAAUL #define WORD_B 0xBBBBBBBBUL #define WORD_C 0xCCCCCCCCUL #define WORD_D 0xDDDDDDDDUL #define DWORD_HI (WORD_A << 32 | WORD_B) #define DWORD_LO (WORD_C << 32 | WORD_D) #define TEST(HI, LO, UIM, RES) \ do { \ union { \ uint64_t u; \ double f; \ } h = { .u = HI }, l = { .u = LO }; \ /* \ * Use a pair of FPRs to load the VSR avoiding insns \ * newer than xxswapd. \ */ \ asm("xxmrghd 32, %0, %1\n\t" \ "xxspltw 32, 32, %2\n\t" \ "xxmrghd %0, 32, %0\n\t" \ "xxswapd 32, 32\n\t" \ "xxmrghd %1, 32, %1\n\t" \ : "+f" (h.f), "+f" (l.f) \ : "i" (UIM) \ : "v0"); \ printf("xxspltw(0x%016" PRIx64 "%016" PRIx64 ", %d) =" \ " %016" PRIx64 "%016" PRIx64 "\n", HI, LO, UIM, \ h.u, l.u); \ assert(h.u == (RES)); \ assert(l.u == (RES)); \ } while (0) int main(void) { TEST(DWORD_HI, DWORD_LO, 0, WORD_A << 32 | WORD_A); TEST(DWORD_HI, DWORD_LO, 1, WORD_B << 32 | WORD_B); TEST(DWORD_HI, DWORD_LO, 2, WORD_C << 32 | WORD_C); TEST(DWORD_HI, DWORD_LO, 3, WORD_D << 32 | WORD_D); return 0; }