Viewing file:  pr92645-4.c (1.61 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -mavx2 -fdump-tree-optimized -Wno-psabi -mno-avx512f" } */
typedef unsigned int u32v4 __attribute__((vector_size(16)));
typedef unsigned short u16v16 __attribute__((vector_size(32)));
typedef unsigned char u8v16 __attribute__((vector_size(16)));
union vec128 {
u8v16 u8;
u32v4 u32;
};
#define memcpy __builtin_memcpy
static u16v16 zxt(u8v16 x)
{
return (u16v16) {
x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7],
x[8], x[9], x[10], x[11], x[12], x[13], x[14], x[15]
};
}
static u8v16 narrow(u16v16 x)
{
return (u8v16) {
x[0], x[1], x[2], x[3], x[4], x[5], x[6], x[7],
x[8], x[9], x[10], x[11], x[12], x[13], x[14], x[15]
};
}
void f(char *dst, char *src, unsigned long n, unsigned c)
{
unsigned ia = 255 - (c >> 24);
ia += ia >> 7;
union vec128 c4 = {0}, ia16 = {0};
c4.u32 += c;
ia16.u8 += (unsigned char)ia;
u16v16 c16 = (zxt(c4.u8) << 8) + 128;
for (; n; src += 16, dst += 16, n -= 4) {
union vec128 s;
memcpy(&s, src, sizeof s);
s.u8 = narrow((zxt(s.u8)*zxt(ia16.u8) + c16) >> 8);
memcpy(dst, &s, sizeof s);
}
}
/* { dg-final { scan-tree-dump-times "\\(vector\\(16\\) short unsigned int\\)" 3 "optimized" } } */
/* We're missing an opportunity to, after later optimizations, combine
a uniform CTOR with a vector promotion to a CTOR on a promoted
element. */
/* { dg-final { scan-tree-dump-times "\\(vector\\(16\\) short unsigned int\\)" 2 "optimized" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "VEC_PACK_TRUNC" 1 "optimized" } } */
/* { dg-final { scan-tree-dump-times "BIT_FIELD_REF" 2 "optimized" } } */
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