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Fix 64 bit based rotates for use with ForceWare >= 358.x

This commit is contained in:
jsteube 2015-12-21 23:49:22 +01:00
parent 4e3ec5802e
commit 21891bf8db

View File

@ -194,6 +194,57 @@ static inline u64 rotl64 (const u64 a, const u32 n)
#ifdef IS_NV #ifdef IS_NV
#if CUDA_ARCH >= 350
static u32 rotr32 (const u32 a, const u32 n)
{
u32 r;
asm ("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(r) : "r"(a), "r"(a), "r"(n));
return r;
}
static u32 rotl32 (const u32 a, const u32 n)
{
return rotr32 (a, 32 - n);
}
static u64 rotr64 (const u64 a, const u32 n)
{
u32 il;
u32 ir;
asm ("mov.b64 {%0, %1}, %2;" : "=r"(il), "=r"(ir) : "l"(a));
u32 tl;
u32 tr;
if (n >= 32)
{
asm ("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(tl) : "r"(ir), "r"(il), "r"(n - 32));
asm ("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(tr) : "r"(il), "r"(ir), "r"(n - 32));
}
else
{
asm ("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(tl) : "r"(il), "r"(ir), "r"(n));
asm ("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(tr) : "r"(ir), "r"(il), "r"(n));
}
u64 r;
asm ("mov.b64 %0, {%1, %2};" : "=l"(r) : "r"(tl), "r"(tr));
return r;
}
static u64 rotl64 (const u64 a, const u32 n)
{
return rotr64 (a, 64 - n);
}
#else
static inline u32 rotr32 (const u32 a, const u32 n) static inline u32 rotr32 (const u32 a, const u32 n)
{ {
return rotate (a, 32 - n); return rotate (a, 32 - n);
@ -214,6 +265,7 @@ static inline u64 rotl64 (const u64 a, const u64 n)
return rotate (a, n); return rotate (a, n);
} }
#endif
#endif #endif
typedef struct typedef struct