extra_vsx_asm.c
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/** * Testing ASM VSX register number fixer '%x<n>' * * old versions of CLANG doesn't support %x<n> in the inline asm template * which fixes register number when using any of the register constraints wa, wd, wf. * * xref: * - https://bugs.llvm.org/show_bug.cgi?id=31837 * - https://gcc.gnu.org/onlinedocs/gcc/Machine-Constraints.html */ #ifndef __VSX__ #error "VSX is not supported" #endif #include <altivec.h> #if (defined(__GNUC__) && !defined(vec_xl)) || (defined(__clang__) && !defined(__IBMC__)) #define vsx_ld vec_vsx_ld #define vsx_st vec_vsx_st #else #define vsx_ld vec_xl #define vsx_st vec_xst #endif int main(void) { float z4[] = {0, 0, 0, 0}; signed int zout[] = {0, 0, 0, 0}; __vector float vz4 = vsx_ld(0, z4); __vector signed int asm_ret = vsx_ld(0, zout); __asm__ ("xvcvspsxws %x0,%x1" : "=wa" (vz4) : "wa" (asm_ret)); vsx_st(asm_ret, 0, zout); return zout[0]; }
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