GOSTcoin support for ccminer CUDA miner project, compatible with most nvidia cards
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#ifndef CUDA_HELPER_H
#define CUDA_HELPER_H
#include <cuda.h>
#include <cuda_runtime.h>
#ifdef __INTELLISENSE__
/* reduce vstudio warnings (__byteperm, blockIdx...) */
#include <device_functions.h>
#include <device_launch_parameters.h>
#define __launch_bounds__(max_tpb, min_blocks)
#endif
#include <stdbool.h>
#include <stdint.h>
#ifndef UINT32_MAX
/* slackware need that */
#define UINT32_MAX UINT_MAX
#endif
#ifndef MAX_GPUS
#define MAX_GPUS 16
#endif
extern "C" short device_map[MAX_GPUS];
extern "C" long device_sm[MAX_GPUS];
extern int cuda_arch[MAX_GPUS];
// common functions
extern int cuda_get_arch(int thr_id);
extern void cuda_check_cpu_init(int thr_id, uint32_t threads);
extern void cuda_check_cpu_free(int thr_id);
extern void cuda_check_cpu_setTarget(const void *ptarget);
extern uint32_t cuda_check_hash(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_inputHash);
extern uint32_t cuda_check_hash_suppl(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_inputHash, uint8_t numNonce);
extern cudaError_t MyStreamSynchronize(cudaStream_t stream, int situation, int thr_id);
extern void cudaReportHardwareFailure(int thr_id, cudaError_t error, const char* func);
extern __device__ __device_builtin__ void __syncthreads(void);
extern __device__ __device_builtin__ void __threadfence(void);
#ifndef __CUDA_ARCH__
// define blockDim and threadIdx for host
extern const dim3 blockDim;
extern const uint3 threadIdx;
#endif
#ifndef SPH_C32
#define SPH_C32(x) (x)
// #define SPH_C32(x) ((uint32_t)(x ## U))
#endif
#ifndef SPH_C64
#define SPH_C64(x) (x)
// #define SPH_C64(x) ((uint64_t)(x ## ULL))
#endif
#ifndef SPH_T32
#define SPH_T32(x) (x)
// #define SPH_T32(x) ((x) & SPH_C32(0xFFFFFFFF))
#endif
#ifndef SPH_T64
#define SPH_T64(x) (x)
// #define SPH_T64(x) ((x) & SPH_C64(0xFFFFFFFFFFFFFFFF))
#endif
#if __CUDA_ARCH__ < 320
// Host and Compute 3.0
#define ROTL32(x, n) SPH_T32(((x) << (n)) | ((x) >> (32 - (n))))
#define ROTR32(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
#define __ldg(x) (*(x))
#else
// Compute 3.2+
#define ROTL32(x, n) __funnelshift_l( (x), (x), (n) )
#define ROTR32(x, n) __funnelshift_r( (x), (x), (n) )
#endif
__device__ __forceinline__ uint64_t MAKE_ULONGLONG(uint32_t LO, uint32_t HI)
{
#if __CUDA_ARCH__ >= 130
return __double_as_longlong(__hiloint2double(HI, LO));
#else
return (uint64_t)LO | (((uint64_t)HI) << 32);
#endif
}
// das Hi Word in einem 64 Bit Typen ersetzen
__device__ __forceinline__ uint64_t REPLACE_HIDWORD(const uint64_t &x, const uint32_t &y) {
return (x & 0xFFFFFFFFULL) | (((uint64_t)y) << 32U);
}
// das Lo Word in einem 64 Bit Typen ersetzen
__device__ __forceinline__ uint64_t REPLACE_LODWORD(const uint64_t &x, const uint32_t &y) {
return (x & 0xFFFFFFFF00000000ULL) | ((uint64_t)y);
}
// Endian Drehung f<EFBFBD>r 32 Bit Typen
#ifdef __CUDA_ARCH__
__device__ __forceinline__ uint32_t cuda_swab32(uint32_t x)
{
/* device */
return __byte_perm(x, x, 0x0123);
}
#else
/* host */
#define cuda_swab32(x) \
((((x) << 24) & 0xff000000u) | (((x) << 8) & 0x00ff0000u) | \
(((x) >> 8) & 0x0000ff00u) | (((x) >> 24) & 0x000000ffu))
#endif
// das Lo Word aus einem 64 Bit Typen extrahieren
__device__ __forceinline__ uint32_t _LODWORD(const uint64_t &x) {
#if __CUDA_ARCH__ >= 130
return (uint32_t)__double2loint(__longlong_as_double(x));
#else
return (uint32_t)(x & 0xFFFFFFFFULL);
#endif
}
// das Hi Word aus einem 64 Bit Typen extrahieren
__device__ __forceinline__ uint32_t _HIDWORD(const uint64_t &x) {
#if __CUDA_ARCH__ >= 130
return (uint32_t)__double2hiint(__longlong_as_double(x));
#else
return (uint32_t)(x >> 32);
#endif
}
#ifdef __CUDA_ARCH__
__device__ __forceinline__ uint64_t cuda_swab64(uint64_t x)
{
// Input: 77665544 33221100
// Output: 00112233 44556677
uint64_t result;
//result = __byte_perm((uint32_t) x, 0, 0x0123);
//return (result << 32) + __byte_perm(_HIDWORD(x), 0, 0x0123);
asm("{ .reg .b32 x, y; // swab64\n\t"
"mov.b64 {x,y}, %1;\n\t"
"prmt.b32 x, x, 0, 0x0123;\n\t"
"prmt.b32 y, y, 0, 0x0123;\n\t"
"mov.b64 %0, {y,x};\n\t"
"}\n" : "=l"(result): "l"(x));
return result;
}
#else
/* host */
#define cuda_swab64(x) \
((uint64_t)((((uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \
(((uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \
(((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \
(((uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \
(((uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \
(((uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \
(((uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \
(((uint64_t)(x) & 0x00000000000000ffULL) << 56)))
#endif
// swap two uint32_t without extra registers
__device__ __host__ __forceinline__ void xchg(uint32_t &x, uint32_t &y) {
x ^= y; y = x ^ y; x ^= y;
}
// for other types...
#define XCHG(x, y) { x ^= y; y = x ^ y; x ^= y; }
/*********************************************************************/
// Macros to catch CUDA errors in CUDA runtime calls
#define CUDA_SAFE_CALL(call) \
do { \
cudaError_t err = call; \
if (cudaSuccess != err) { \
fprintf(stderr, "Cuda error in func '%s' at line %i : %s.\n", \
__FUNCTION__, __LINE__, cudaGetErrorString(err) ); \
exit(EXIT_FAILURE); \
} \
} while (0)
#define CUDA_CALL_OR_RET(call) do { \
cudaError_t err = call; \
if (cudaSuccess != err) { \
cudaReportHardwareFailure(thr_id, err, __FUNCTION__); \
return; \
} \
} while (0)
#define CUDA_CALL_OR_RET_X(call, ret) do { \
cudaError_t err = call; \
if (cudaSuccess != err) { \
cudaReportHardwareFailure(thr_id, err, __FUNCTION__); \
return ret; \
} \
} while (0)
/*********************************************************************/
#if !defined(__CUDA_ARCH__) || defined(_WIN64)
#define USE_XOR_ASM_OPTS 0
#else
#define USE_XOR_ASM_OPTS 1
#endif
#if USE_XOR_ASM_OPTS
// device asm for whirpool
__device__ __forceinline__
uint64_t xor1(uint64_t a, uint64_t b)
{
uint64_t result;
asm("xor.b64 %0, %1, %2; // xor1" : "=l"(result) : "l"(a), "l"(b));
return result;
}
#else
#define xor1(a,b) (a ^ b)
#endif
#if USE_XOR_ASM_OPTS
// device asm for whirpool
__device__ __forceinline__
uint64_t xor3(uint64_t a, uint64_t b, uint64_t c)
{
uint64_t result;
asm("xor.b64 %0, %2, %3; // xor3\n\t"
"xor.b64 %0, %0, %1;\n\t"
/* output : input registers */
: "=l"(result) : "l"(a), "l"(b), "l"(c));
return result;
}
#else
#define xor3(a,b,c) (a ^ b ^ c)
#endif
#if USE_XOR_ASM_OPTS
// device asm for whirpool
__device__ __forceinline__
uint64_t xor8(uint64_t a, uint64_t b, uint64_t c, uint64_t d,uint64_t e,uint64_t f,uint64_t g, uint64_t h)
{
uint64_t result;
asm("xor.b64 %0, %1, %2;" : "=l"(result) : "l"(g) ,"l"(h));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(f));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(e));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(d));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(c));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(b));
asm("xor.b64 %0, %0, %1;" : "+l"(result) : "l"(a));
return result;
}
#else
#define xor8(a,b,c,d,e,f,g,h) ((a^b)^(c^d)^(e^f)^(g^h))
#endif
// device asm for x17
__device__ __forceinline__
uint64_t xandx(uint64_t a, uint64_t b, uint64_t c)
{
#ifdef __CUDA_ARCH__
uint64_t result;
asm("{ // xandx \n\t"
".reg .u64 n;\n\t"
"xor.b64 %0, %2, %3;\n\t"
"and.b64 n, %0, %1;\n\t"
"xor.b64 %0, n, %3;\n\t"
"}\n" : "=l"(result) : "l"(a), "l"(b), "l"(c));
return result;
#else
return ((b^c) & a) ^ c;
#endif
}
// device asm for x17
__device__ __forceinline__
uint64_t andor(uint64_t a, uint64_t b, uint64_t c)
{
#ifdef __CUDA_ARCH__
uint64_t result;
asm("{ // andor\n\t"
".reg .u64 m,n;\n\t"
"and.b64 m, %1, %2;\n\t"
" or.b64 n, %1, %2;\n\t"
"and.b64 %0, n, %3;\n\t"
" or.b64 %0, %0, m;\n\t"
"}\n" : "=l"(result) : "l"(a), "l"(b), "l"(c));
return result;
#else
return ((a | b) & c) | (a & b);
#endif
}
// device asm for x17
__device__ __forceinline__
uint64_t shr_t64(uint64_t x, uint32_t n)
{
#ifdef __CUDA_ARCH__
uint64_t result;
asm("shr.b64 %0,%1,%2;\n\t"
: "=l"(result) : "l"(x), "r"(n));
return result;
#else
return x >> n;
#endif
}
__device__ __forceinline__
uint64_t shl_t64(uint64_t x, uint32_t n)
{
#ifdef __CUDA_ARCH__
uint64_t result;
asm("shl.b64 %0,%1,%2;\n\t"
: "=l"(result) : "l"(x), "r"(n));
return result;
#else
return x << n;
#endif
}
__device__ __forceinline__
uint32_t shr_t32(uint32_t x,uint32_t n) {
#ifdef __CUDA_ARCH__
uint32_t result;
asm("shr.b32 %0,%1,%2;" : "=r"(result) : "r"(x), "r"(n));
return result;
#else
return x >> n;
#endif
}
__device__ __forceinline__
uint32_t shl_t32(uint32_t x,uint32_t n) {
#ifdef __CUDA_ARCH__
uint32_t result;
asm("shl.b32 %0,%1,%2;" : "=r"(result) : "r"(x), "r"(n));
return result;
#else
return x << n;
#endif
}
#ifndef USE_ROT_ASM_OPT
#define USE_ROT_ASM_OPT 1
#endif
// 64-bit ROTATE RIGHT
#if __CUDA_ARCH__ >= 320 && USE_ROT_ASM_OPT == 1
/* complicated sm >= 3.5 one (with Funnel Shifter beschleunigt), to bench */
__device__ __forceinline__
uint64_t ROTR64(const uint64_t value, const int offset) {
uint2 result;
if(offset < 32) {
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(__double2loint(__longlong_as_double(value))), "r"(__double2hiint(__longlong_as_double(value))), "r"(offset));
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(__double2hiint(__longlong_as_double(value))), "r"(__double2loint(__longlong_as_double(value))), "r"(offset));
} else {
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(__double2hiint(__longlong_as_double(value))), "r"(__double2loint(__longlong_as_double(value))), "r"(offset));
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(__double2loint(__longlong_as_double(value))), "r"(__double2hiint(__longlong_as_double(value))), "r"(offset));
}
return __double_as_longlong(__hiloint2double(result.y, result.x));
}
#elif __CUDA_ARCH__ >= 120 && USE_ROT_ASM_OPT == 2
__device__ __forceinline__
uint64_t ROTR64(const uint64_t x, const int offset)
{
uint64_t result;
asm("{ // ROTR64 \n\t"
".reg .b64 lhs;\n\t"
".reg .u32 roff;\n\t"
"shr.b64 lhs, %1, %2;\n\t"
"sub.u32 roff, 64, %2;\n\t"
"shl.b64 %0, %1, roff;\n\t"
"add.u64 %0, %0, lhs;\n\t"
"}\n" : "=l"(result) : "l"(x), "r"(offset));
return result;
}
#else
/* host */
#define ROTR64(x, n) (((x) >> (n)) | ((x) << (64 - (n))))
#endif
// 64-bit ROTATE LEFT
#if __CUDA_ARCH__ >= 320 && USE_ROT_ASM_OPT == 1
__device__ __forceinline__
uint64_t ROTL64(const uint64_t value, const int offset) {
uint2 result;
if(offset >= 32) {
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(__double2loint(__longlong_as_double(value))), "r"(__double2hiint(__longlong_as_double(value))), "r"(offset));
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(__double2hiint(__longlong_as_double(value))), "r"(__double2loint(__longlong_as_double(value))), "r"(offset));
} else {
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(__double2hiint(__longlong_as_double(value))), "r"(__double2loint(__longlong_as_double(value))), "r"(offset));
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(__double2loint(__longlong_as_double(value))), "r"(__double2hiint(__longlong_as_double(value))), "r"(offset));
}
return __double_as_longlong(__hiloint2double(result.y, result.x));
}
#elif __CUDA_ARCH__ >= 120 && USE_ROT_ASM_OPT == 2
__device__ __forceinline__
uint64_t ROTL64(const uint64_t x, const int offset)
{
uint64_t result;
asm("{ // ROTL64 \n\t"
".reg .b64 lhs;\n\t"
".reg .u32 roff;\n\t"
"shl.b64 lhs, %1, %2;\n\t"
"sub.u32 roff, 64, %2;\n\t"
"shr.b64 %0, %1, roff;\n\t"
"add.u64 %0, lhs, %0;\n\t"
"}\n" : "=l"(result) : "l"(x), "r"(offset));
return result;
}
#elif __CUDA_ARCH__ >= 320 && USE_ROT_ASM_OPT == 3
__device__
uint64_t ROTL64(const uint64_t x, const int offset)
{
uint64_t res;
asm("{ // ROTL64 \n\t"
".reg .u32 tl,th,vl,vh;\n\t"
".reg .pred p;\n\t"
"mov.b64 {tl,th}, %1;\n\t"
"shf.l.wrap.b32 vl, tl, th, %2;\n\t"
"shf.l.wrap.b32 vh, th, tl, %2;\n\t"
"setp.lt.u32 p, %2, 32;\n\t"
"@!p mov.b64 %0, {vl,vh};\n\t"
"@p mov.b64 %0, {vh,vl};\n\t"
"}\n" : "=l"(res) : "l"(x) , "r"(offset)
);
return res;
}
#else
/* host */
#define ROTL64(x, n) (((x) << (n)) | ((x) >> (64 - (n))))
#endif
__device__ __forceinline__
uint64_t SWAPDWORDS(uint64_t value)
{
#if __CUDA_ARCH__ >= 320
uint2 temp;
asm("mov.b64 {%0, %1}, %2; ": "=r"(temp.x), "=r"(temp.y) : "l"(value));
asm("mov.b64 %0, {%1, %2}; ": "=l"(value) : "r"(temp.y), "r"(temp.x));
return value;
#else
return ROTL64(value, 32);
#endif
}
/* lyra2/bmw - uint2 vector's operators */
__device__ __forceinline__
void LOHI(uint32_t &lo, uint32_t &hi, uint64_t x) {
#ifdef __CUDA_ARCH__
asm("mov.b64 {%0,%1},%2; \n\t"
: "=r"(lo), "=r"(hi) : "l"(x));
#else
lo = (uint32_t)(x);
hi = (uint32_t)(x >> 32);
#endif
}
static __host__ __device__ __forceinline__ uint2 vectorize(uint64_t v) {
uint2 result;
#ifdef __CUDA_ARCH__
asm("mov.b64 {%0,%1},%2; \n\t"
: "=r"(result.x), "=r"(result.y) : "l"(v));
#else
result.x = (uint32_t)(v);
result.y = (uint32_t)(v >> 32);
#endif
return result;
}
static __host__ __device__ __forceinline__ uint64_t devectorize(uint2 v) {
#ifdef __CUDA_ARCH__
return MAKE_ULONGLONG(v.x, v.y);
#else
return (((uint64_t)v.y) << 32) + v.x;
#endif
}
/**
* uint2 direct ops by c++ operator definitions
*/
static __device__ __forceinline__ uint2 operator^ (uint2 a, uint2 b) { return make_uint2(a.x ^ b.x, a.y ^ b.y); }
static __device__ __forceinline__ uint2 operator& (uint2 a, uint2 b) { return make_uint2(a.x & b.x, a.y & b.y); }
static __device__ __forceinline__ uint2 operator| (uint2 a, uint2 b) { return make_uint2(a.x | b.x, a.y | b.y); }
static __device__ __forceinline__ uint2 operator~ (uint2 a) { return make_uint2(~a.x, ~a.y); }
static __device__ __forceinline__ void operator^= (uint2 &a, uint2 b) { a = a ^ b; }
static __device__ __forceinline__ uint2 operator+ (uint2 a, uint2 b) {
return vectorize(devectorize(a) + devectorize(b));
}
static __device__ __forceinline__ void operator+= (uint2 &a, uint2 b) { a = a + b; }
static __device__ __forceinline__ uint2 operator- (uint2 a, uint2 b) {
return vectorize(devectorize(a) - devectorize(b));
}
static __device__ __forceinline__ void operator-= (uint2 &a, uint2 b) { a = a - b; }
/**
* basic multiplication between 64bit no carry outside that range (ie mul.lo.b64(a*b))
* (what does uint64 "*" operator)
*/
static __device__ __forceinline__ uint2 operator* (uint2 a, uint2 b)
{
#ifdef __CUDA_ARCH__
uint2 result;
asm("{ // uint2 a*b \n\t"
"mul.lo.u32 %0, %2, %4; \n\t"
"mul.hi.u32 %1, %2, %4; \n\t"
"mad.lo.cc.u32 %1, %3, %4, %1; \n\t"
"madc.lo.u32 %1, %3, %5, %1; \n\t"
"}\n" : "=r"(result.x), "=r"(result.y) : "r"(a.x), "r"(a.y), "r"(b.x), "r"(b.y));
return result;
#else
// incorrect but unused host equiv
return make_uint2(a.x * b.x, a.y * b.y);
#endif
}
// uint2 ROR/ROL methods
__device__ __forceinline__
uint2 ROR2(const uint2 a, const int offset)
{
uint2 result;
#if __CUDA_ARCH__ > 300
if (offset < 32) {
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(a.x), "r"(a.y), "r"(offset));
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(a.y), "r"(a.x), "r"(offset));
} else /* if (offset < 64) */ {
/* offset SHOULD BE < 64 ! */
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(a.y), "r"(a.x), "r"(offset));
asm("shf.r.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(a.x), "r"(a.y), "r"(offset));
}
#else
if (!offset)
result = a;
else if (offset < 32) {
result.y = ((a.y >> offset) | (a.x << (32 - offset)));
result.x = ((a.x >> offset) | (a.y << (32 - offset)));
} else if (offset == 32) {
result.y = a.x;
result.x = a.y;
} else {
result.y = ((a.x >> (offset - 32)) | (a.y << (64 - offset)));
result.x = ((a.y >> (offset - 32)) | (a.x << (64 - offset)));
}
#endif
return result;
}
__device__ __forceinline__
uint2 ROL2(const uint2 a, const int offset)
{
uint2 result;
#if __CUDA_ARCH__ > 300
if (offset >= 32) {
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(a.x), "r"(a.y), "r"(offset));
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(a.y), "r"(a.x), "r"(offset));
}
else {
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.x) : "r"(a.y), "r"(a.x), "r"(offset));
asm("shf.l.wrap.b32 %0, %1, %2, %3;" : "=r"(result.y) : "r"(a.x), "r"(a.y), "r"(offset));
}
#else
if (!offset)
result = a;
else
result = ROR2(a, 64 - offset);
#endif
return result;
}
__device__ __forceinline__
uint2 SWAPUINT2(uint2 value)
{
return make_uint2(value.y, value.x);
}
/* Byte aligned Rotations (lyra2) */
#ifdef __CUDA_ARCH__
__device__ __inline__ uint2 ROL8(const uint2 a)
{
uint2 result;
result.x = __byte_perm(a.y, a.x, 0x6543);
result.y = __byte_perm(a.y, a.x, 0x2107);
return result;
}
__device__ __inline__ uint2 ROR16(const uint2 a)
{
uint2 result;
result.x = __byte_perm(a.y, a.x, 0x1076);
result.y = __byte_perm(a.y, a.x, 0x5432);
return result;
}
__device__ __inline__ uint2 ROR24(const uint2 a)
{
uint2 result;
result.x = __byte_perm(a.y, a.x, 0x2107);
result.y = __byte_perm(a.y, a.x, 0x6543);
return result;
}
#else
#define ROL8(u) ROL2(u, 8)
#define ROR16(u) ROR2(u,16)
#define ROR24(u) ROR2(u,24)
#endif
/* uint2 for bmw512 - to double check later */
__device__ __forceinline__
static uint2 SHL2(uint2 a, int offset)
{
#if __CUDA_ARCH__ > 300
uint2 result;
if (offset < 32) {
asm("{ // SHL2 (l) \n\t"
"shf.l.clamp.b32 %1, %2, %3, %4; \n\t"
"shl.b32 %0, %2, %4; \n\t"
"}\n" : "=r"(result.x), "=r"(result.y) : "r"(a.x), "r"(a.y), "r"(offset));
} else {
asm("{ // SHL2 (h) \n\t"
"shf.l.clamp.b32 %1, %2, %3, %4; \n\t"
"shl.b32 %0, %2, %4; \n\t"
"}\n" : "=r"(result.x), "=r"(result.y) : "r"(a.y), "r"(a.x), "r"(offset));
}
return result;
#else
if (offset <= 32) {
a.y = (a.y << offset) | (a.x >> (32 - offset));
a.x = (a.x << offset);
} else {
a.y = (a.x << (offset-32));
a.x = 0;
}
return a;
#endif
}
__device__ __forceinline__
static uint2 SHR2(uint2 a, int offset)
{
#if __CUDA_ARCH__ > 300
uint2 result;
if (offset<32) {
asm("{\n\t"
"shf.r.clamp.b32 %0,%2,%3,%4; \n\t"
"shr.b32 %1,%3,%4; \n\t"
"}\n\t"
: "=r"(result.x), "=r"(result.y) : "r"(a.x), "r"(a.y), "r"(offset));
} else {
asm("{\n\t"
"shf.l.clamp.b32 %0,%2,%3,%4; \n\t"
"shl.b32 %1,%3,%4; \n\t"
"}\n\t"
: "=r"(result.x), "=r"(result.y) : "r"(a.y), "r"(a.x), "r"(offset));
}
return result;
#else
if (offset <= 32) {
a.x = (a.x >> offset) | (a.y << (32 - offset));
a.y = (a.y >> offset);
} else {
a.x = (a.y >> (offset - 32));
a.y = 0;
}
return a;
#endif
}
#endif // #ifndef CUDA_HELPER_H