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Diffstat (limited to 'vendor/github.com/tangerine-network/mcl/src/xbyak/xbyak_util.h')
| -rw-r--r-- | vendor/github.com/tangerine-network/mcl/src/xbyak/xbyak_util.h | 653 |
1 files changed, 653 insertions, 0 deletions
diff --git a/vendor/github.com/tangerine-network/mcl/src/xbyak/xbyak_util.h b/vendor/github.com/tangerine-network/mcl/src/xbyak/xbyak_util.h new file mode 100644 index 000000000..01544501d --- /dev/null +++ b/vendor/github.com/tangerine-network/mcl/src/xbyak/xbyak_util.h @@ -0,0 +1,653 @@ +#ifndef XBYAK_XBYAK_UTIL_H_ +#define XBYAK_XBYAK_UTIL_H_ + +/** + utility class and functions for Xbyak + Xbyak::util::Clock ; rdtsc timer + Xbyak::util::Cpu ; detect CPU + @note this header is UNDER CONSTRUCTION! +*/ +#include "xbyak.h" + +#ifdef _MSC_VER + #if (_MSC_VER < 1400) && defined(XBYAK32) + static inline __declspec(naked) void __cpuid(int[4], int) + { + __asm { + push ebx + push esi + mov eax, dword ptr [esp + 4 * 2 + 8] // eaxIn + cpuid + mov esi, dword ptr [esp + 4 * 2 + 4] // data + mov dword ptr [esi], eax + mov dword ptr [esi + 4], ebx + mov dword ptr [esi + 8], ecx + mov dword ptr [esi + 12], edx + pop esi + pop ebx + ret + } + } + #else + #include <intrin.h> // for __cpuid + #endif +#else + #ifndef __GNUC_PREREQ + #define __GNUC_PREREQ(major, minor) ((((__GNUC__) << 16) + (__GNUC_MINOR__)) >= (((major) << 16) + (minor))) + #endif + #if __GNUC_PREREQ(4, 3) && !defined(__APPLE__) + #include <cpuid.h> + #else + #if defined(__APPLE__) && defined(XBYAK32) // avoid err : can't find a register in class `BREG' while reloading `asm' + #define __cpuid(eaxIn, a, b, c, d) __asm__ __volatile__("pushl %%ebx\ncpuid\nmovl %%ebp, %%esi\npopl %%ebx" : "=a"(a), "=S"(b), "=c"(c), "=d"(d) : "0"(eaxIn)) + #define __cpuid_count(eaxIn, ecxIn, a, b, c, d) __asm__ __volatile__("pushl %%ebx\ncpuid\nmovl %%ebp, %%esi\npopl %%ebx" : "=a"(a), "=S"(b), "=c"(c), "=d"(d) : "0"(eaxIn), "2"(ecxIn)) + #else + #define __cpuid(eaxIn, a, b, c, d) __asm__ __volatile__("cpuid\n" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(eaxIn)) + #define __cpuid_count(eaxIn, ecxIn, a, b, c, d) __asm__ __volatile__("cpuid\n" : "=a"(a), "=b"(b), "=c"(c), "=d"(d) : "0"(eaxIn), "2"(ecxIn)) + #endif + #endif +#endif + +namespace Xbyak { namespace util { + +/** + CPU detection class +*/ +class Cpu { + uint64 type_; + unsigned int get32bitAsBE(const char *x) const + { + return x[0] | (x[1] << 8) | (x[2] << 16) | (x[3] << 24); + } + unsigned int mask(int n) const + { + return (1U << n) - 1; + } + void setFamily() + { + unsigned int data[4]; + getCpuid(1, data); + stepping = data[0] & mask(4); + model = (data[0] >> 4) & mask(4); + family = (data[0] >> 8) & mask(4); + // type = (data[0] >> 12) & mask(2); + extModel = (data[0] >> 16) & mask(4); + extFamily = (data[0] >> 20) & mask(8); + if (family == 0x0f) { + displayFamily = family + extFamily; + } else { + displayFamily = family; + } + if (family == 6 || family == 0x0f) { + displayModel = (extModel << 4) + model; + } else { + displayModel = model; + } + } + unsigned int extractBit(unsigned int val, unsigned int base, unsigned int end) + { + return (val >> base) & ((1u << (end - base)) - 1); + } + void setCacheHierarchy() + { + if ((type_ & tINTEL) == 0) return; + const unsigned int NO_CACHE = 0; + const unsigned int DATA_CACHE = 1; +// const unsigned int INSTRUCTION_CACHE = 2; + const unsigned int UNIFIED_CACHE = 3; + unsigned int smt_width = 0; + unsigned int n_cores = 0; + unsigned int data[4]; + + /* + if leaf 11 exists, we use it to get the number of smt cores and cores on socket + If x2APIC is supported, these are the only correct numbers. + + leaf 0xB can be zeroed-out by a hypervisor + */ + getCpuidEx(0x0, 0, data); + if (data[0] >= 0xB) { + getCpuidEx(0xB, 0, data); // CPUID for SMT Level + smt_width = data[1] & 0x7FFF; + getCpuidEx(0xB, 1, data); // CPUID for CORE Level + n_cores = data[1] & 0x7FFF; + } + + /* + Assumptions: + the first level of data cache is not shared (which is the + case for every existing architecture) and use this to + determine the SMT width for arch not supporting leaf 11. + when leaf 4 reports a number of core less than n_cores + on socket reported by leaf 11, then it is a correct number + of cores not an upperbound. + */ + for (int i = 0; data_cache_levels < maxNumberCacheLevels; i++) { + getCpuidEx(0x4, i, data); + unsigned int cacheType = extractBit(data[0], 0, 4); + if (cacheType == NO_CACHE) break; + if (cacheType == DATA_CACHE || cacheType == UNIFIED_CACHE) { + unsigned int nb_logical_cores = extractBit(data[0], 14, 25) + 1; + if (n_cores != 0) { // true only if leaf 0xB is supported and valid + nb_logical_cores = (std::min)(nb_logical_cores, n_cores); + } + assert(nb_logical_cores != 0); + data_cache_size[data_cache_levels] = + (extractBit(data[1], 22, 31) + 1) + * (extractBit(data[1], 12, 21) + 1) + * (extractBit(data[1], 0, 11) + 1) + * (data[2] + 1); + if (cacheType == DATA_CACHE && smt_width == 0) smt_width = nb_logical_cores; + assert(smt_width != 0); + cores_sharing_data_cache[data_cache_levels] = (std::max)(nb_logical_cores / smt_width, 1u); + data_cache_levels++; + } + } + } + +public: + int model; + int family; + int stepping; + int extModel; + int extFamily; + int displayFamily; // family + extFamily + int displayModel; // model + extModel + + // may I move these members into private? + static const unsigned int maxNumberCacheLevels = 10; + unsigned int data_cache_size[maxNumberCacheLevels]; + unsigned int cores_sharing_data_cache[maxNumberCacheLevels]; + unsigned int data_cache_levels; + + unsigned int getDataCacheLevels() const { return data_cache_levels; } + unsigned int getCoresSharingDataCache(unsigned int i) const + { + if (i >= data_cache_levels) throw Error(ERR_BAD_PARAMETER); + return cores_sharing_data_cache[i]; + } + unsigned int getDataCacheSize(unsigned int i) const + { + if (i >= data_cache_levels) throw Error(ERR_BAD_PARAMETER); + return data_cache_size[i]; + } + + /* + data[] = { eax, ebx, ecx, edx } + */ + static inline void getCpuid(unsigned int eaxIn, unsigned int data[4]) + { +#ifdef _MSC_VER + __cpuid(reinterpret_cast<int*>(data), eaxIn); +#else + __cpuid(eaxIn, data[0], data[1], data[2], data[3]); +#endif + } + static inline void getCpuidEx(unsigned int eaxIn, unsigned int ecxIn, unsigned int data[4]) + { +#ifdef _MSC_VER + __cpuidex(reinterpret_cast<int*>(data), eaxIn, ecxIn); +#else + __cpuid_count(eaxIn, ecxIn, data[0], data[1], data[2], data[3]); +#endif + } + static inline uint64 getXfeature() + { +#ifdef _MSC_VER + return _xgetbv(0); +#else + unsigned int eax, edx; + // xgetvb is not support on gcc 4.2 +// __asm__ volatile("xgetbv" : "=a"(eax), "=d"(edx) : "c"(0)); + __asm__ volatile(".byte 0x0f, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c"(0)); + return ((uint64)edx << 32) | eax; +#endif + } + typedef uint64 Type; + + static const Type NONE = 0; + static const Type tMMX = 1 << 0; + static const Type tMMX2 = 1 << 1; + static const Type tCMOV = 1 << 2; + static const Type tSSE = 1 << 3; + static const Type tSSE2 = 1 << 4; + static const Type tSSE3 = 1 << 5; + static const Type tSSSE3 = 1 << 6; + static const Type tSSE41 = 1 << 7; + static const Type tSSE42 = 1 << 8; + static const Type tPOPCNT = 1 << 9; + static const Type tAESNI = 1 << 10; + static const Type tSSE5 = 1 << 11; + static const Type tOSXSAVE = 1 << 12; + static const Type tPCLMULQDQ = 1 << 13; + static const Type tAVX = 1 << 14; + static const Type tFMA = 1 << 15; + + static const Type t3DN = 1 << 16; + static const Type tE3DN = 1 << 17; + static const Type tSSE4a = 1 << 18; + static const Type tRDTSCP = 1 << 19; + static const Type tAVX2 = 1 << 20; + static const Type tBMI1 = 1 << 21; // andn, bextr, blsi, blsmsk, blsr, tzcnt + static const Type tBMI2 = 1 << 22; // bzhi, mulx, pdep, pext, rorx, sarx, shlx, shrx + static const Type tLZCNT = 1 << 23; + + static const Type tINTEL = 1 << 24; + static const Type tAMD = 1 << 25; + + static const Type tENHANCED_REP = 1 << 26; // enhanced rep movsb/stosb + static const Type tRDRAND = 1 << 27; + static const Type tADX = 1 << 28; // adcx, adox + static const Type tRDSEED = 1 << 29; // rdseed + static const Type tSMAP = 1 << 30; // stac + static const Type tHLE = uint64(1) << 31; // xacquire, xrelease, xtest + static const Type tRTM = uint64(1) << 32; // xbegin, xend, xabort + static const Type tF16C = uint64(1) << 33; // vcvtph2ps, vcvtps2ph + static const Type tMOVBE = uint64(1) << 34; // mobve + static const Type tAVX512F = uint64(1) << 35; + static const Type tAVX512DQ = uint64(1) << 36; + static const Type tAVX512_IFMA = uint64(1) << 37; + static const Type tAVX512IFMA = tAVX512_IFMA; + static const Type tAVX512PF = uint64(1) << 38; + static const Type tAVX512ER = uint64(1) << 39; + static const Type tAVX512CD = uint64(1) << 40; + static const Type tAVX512BW = uint64(1) << 41; + static const Type tAVX512VL = uint64(1) << 42; + static const Type tAVX512_VBMI = uint64(1) << 43; + static const Type tAVX512VBMI = tAVX512_VBMI; // changed by Intel's manual + static const Type tAVX512_4VNNIW = uint64(1) << 44; + static const Type tAVX512_4FMAPS = uint64(1) << 45; + static const Type tPREFETCHWT1 = uint64(1) << 46; + static const Type tPREFETCHW = uint64(1) << 47; + static const Type tSHA = uint64(1) << 48; + static const Type tMPX = uint64(1) << 49; + static const Type tAVX512_VBMI2 = uint64(1) << 50; + static const Type tGFNI = uint64(1) << 51; + static const Type tVAES = uint64(1) << 52; + static const Type tVPCLMULQDQ = uint64(1) << 53; + static const Type tAVX512_VNNI = uint64(1) << 54; + static const Type tAVX512_BITALG = uint64(1) << 55; + static const Type tAVX512_VPOPCNTDQ = uint64(1) << 56; + + Cpu() + : type_(NONE) + , data_cache_levels(0) + { + unsigned int data[4]; + const unsigned int& EAX = data[0]; + const unsigned int& EBX = data[1]; + const unsigned int& ECX = data[2]; + const unsigned int& EDX = data[3]; + getCpuid(0, data); + const unsigned int maxNum = EAX; + static const char intel[] = "ntel"; + static const char amd[] = "cAMD"; + if (ECX == get32bitAsBE(amd)) { + type_ |= tAMD; + getCpuid(0x80000001, data); + if (EDX & (1U << 31)) type_ |= t3DN; + if (EDX & (1U << 15)) type_ |= tCMOV; + if (EDX & (1U << 30)) type_ |= tE3DN; + if (EDX & (1U << 22)) type_ |= tMMX2; + if (EDX & (1U << 27)) type_ |= tRDTSCP; + } + if (ECX == get32bitAsBE(intel)) { + type_ |= tINTEL; + getCpuid(0x80000001, data); + if (EDX & (1U << 27)) type_ |= tRDTSCP; + if (ECX & (1U << 5)) type_ |= tLZCNT; + if (ECX & (1U << 8)) type_ |= tPREFETCHW; + } + getCpuid(1, data); + if (ECX & (1U << 0)) type_ |= tSSE3; + if (ECX & (1U << 9)) type_ |= tSSSE3; + if (ECX & (1U << 19)) type_ |= tSSE41; + if (ECX & (1U << 20)) type_ |= tSSE42; + if (ECX & (1U << 22)) type_ |= tMOVBE; + if (ECX & (1U << 23)) type_ |= tPOPCNT; + if (ECX & (1U << 25)) type_ |= tAESNI; + if (ECX & (1U << 1)) type_ |= tPCLMULQDQ; + if (ECX & (1U << 27)) type_ |= tOSXSAVE; + if (ECX & (1U << 30)) type_ |= tRDRAND; + if (ECX & (1U << 29)) type_ |= tF16C; + + if (EDX & (1U << 15)) type_ |= tCMOV; + if (EDX & (1U << 23)) type_ |= tMMX; + if (EDX & (1U << 25)) type_ |= tMMX2 | tSSE; + if (EDX & (1U << 26)) type_ |= tSSE2; + + if (type_ & tOSXSAVE) { + // check XFEATURE_ENABLED_MASK[2:1] = '11b' + uint64 bv = getXfeature(); + if ((bv & 6) == 6) { + if (ECX & (1U << 28)) type_ |= tAVX; + if (ECX & (1U << 12)) type_ |= tFMA; + if (((bv >> 5) & 7) == 7) { + getCpuidEx(7, 0, data); + if (EBX & (1U << 16)) type_ |= tAVX512F; + if (type_ & tAVX512F) { + if (EBX & (1U << 17)) type_ |= tAVX512DQ; + if (EBX & (1U << 21)) type_ |= tAVX512_IFMA; + if (EBX & (1U << 26)) type_ |= tAVX512PF; + if (EBX & (1U << 27)) type_ |= tAVX512ER; + if (EBX & (1U << 28)) type_ |= tAVX512CD; + if (EBX & (1U << 30)) type_ |= tAVX512BW; + if (EBX & (1U << 31)) type_ |= tAVX512VL; + if (ECX & (1U << 1)) type_ |= tAVX512_VBMI; + if (ECX & (1U << 6)) type_ |= tAVX512_VBMI2; + if (ECX & (1U << 8)) type_ |= tGFNI; + if (ECX & (1U << 9)) type_ |= tVAES; + if (ECX & (1U << 10)) type_ |= tVPCLMULQDQ; + if (ECX & (1U << 11)) type_ |= tAVX512_VNNI; + if (ECX & (1U << 12)) type_ |= tAVX512_BITALG; + if (ECX & (1U << 14)) type_ |= tAVX512_VPOPCNTDQ; + if (EDX & (1U << 2)) type_ |= tAVX512_4VNNIW; + if (EDX & (1U << 3)) type_ |= tAVX512_4FMAPS; + } + } + } + } + if (maxNum >= 7) { + getCpuidEx(7, 0, data); + if (type_ & tAVX && (EBX & (1U << 5))) type_ |= tAVX2; + if (EBX & (1U << 3)) type_ |= tBMI1; + if (EBX & (1U << 8)) type_ |= tBMI2; + if (EBX & (1U << 9)) type_ |= tENHANCED_REP; + if (EBX & (1U << 18)) type_ |= tRDSEED; + if (EBX & (1U << 19)) type_ |= tADX; + if (EBX & (1U << 20)) type_ |= tSMAP; + if (EBX & (1U << 4)) type_ |= tHLE; + if (EBX & (1U << 11)) type_ |= tRTM; + if (EBX & (1U << 14)) type_ |= tMPX; + if (EBX & (1U << 29)) type_ |= tSHA; + if (ECX & (1U << 0)) type_ |= tPREFETCHWT1; + } + setFamily(); + setCacheHierarchy(); + } + void putFamily() const + { + printf("family=%d, model=%X, stepping=%d, extFamily=%d, extModel=%X\n", + family, model, stepping, extFamily, extModel); + printf("display:family=%X, model=%X\n", displayFamily, displayModel); + } + bool has(Type type) const + { + return (type & type_) != 0; + } +}; + +class Clock { +public: + static inline uint64 getRdtsc() + { +#ifdef _MSC_VER + return __rdtsc(); +#else + unsigned int eax, edx; + __asm__ volatile("rdtsc" : "=a"(eax), "=d"(edx)); + return ((uint64)edx << 32) | eax; +#endif + } + Clock() + : clock_(0) + , count_(0) + { + } + void begin() + { + clock_ -= getRdtsc(); + } + void end() + { + clock_ += getRdtsc(); + count_++; + } + int getCount() const { return count_; } + uint64 getClock() const { return clock_; } + void clear() { count_ = 0; clock_ = 0; } +private: + uint64 clock_; + int count_; +}; + +#ifdef XBYAK64 +const int UseRCX = 1 << 6; +const int UseRDX = 1 << 7; + +class Pack { + static const size_t maxTblNum = 15; + const Xbyak::Reg64 *tbl_[maxTblNum]; + size_t n_; +public: + Pack() : tbl_(), n_(0) {} + Pack(const Xbyak::Reg64 *tbl, size_t n) { init(tbl, n); } + Pack(const Pack& rhs) + : n_(rhs.n_) + { + for (size_t i = 0; i < n_; i++) tbl_[i] = rhs.tbl_[i]; + } + Pack& operator=(const Pack& rhs) + { + n_ = rhs.n_; + for (size_t i = 0; i < n_; i++) tbl_[i] = rhs.tbl_[i]; + return *this; + } + Pack(const Xbyak::Reg64& t0) + { n_ = 1; tbl_[0] = &t0; } + Pack(const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 2; tbl_[0] = &t0; tbl_[1] = &t1; } + Pack(const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 3; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; } + Pack(const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 4; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; } + Pack(const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 5; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; } + Pack(const Xbyak::Reg64& t5, const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 6; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; tbl_[5] = &t5; } + Pack(const Xbyak::Reg64& t6, const Xbyak::Reg64& t5, const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 7; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; tbl_[5] = &t5; tbl_[6] = &t6; } + Pack(const Xbyak::Reg64& t7, const Xbyak::Reg64& t6, const Xbyak::Reg64& t5, const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 8; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; tbl_[5] = &t5; tbl_[6] = &t6; tbl_[7] = &t7; } + Pack(const Xbyak::Reg64& t8, const Xbyak::Reg64& t7, const Xbyak::Reg64& t6, const Xbyak::Reg64& t5, const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 9; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; tbl_[5] = &t5; tbl_[6] = &t6; tbl_[7] = &t7; tbl_[8] = &t8; } + Pack(const Xbyak::Reg64& t9, const Xbyak::Reg64& t8, const Xbyak::Reg64& t7, const Xbyak::Reg64& t6, const Xbyak::Reg64& t5, const Xbyak::Reg64& t4, const Xbyak::Reg64& t3, const Xbyak::Reg64& t2, const Xbyak::Reg64& t1, const Xbyak::Reg64& t0) + { n_ = 10; tbl_[0] = &t0; tbl_[1] = &t1; tbl_[2] = &t2; tbl_[3] = &t3; tbl_[4] = &t4; tbl_[5] = &t5; tbl_[6] = &t6; tbl_[7] = &t7; tbl_[8] = &t8; tbl_[9] = &t9; } + Pack& append(const Xbyak::Reg64& t) + { + if (n_ == maxTblNum) { + fprintf(stderr, "ERR Pack::can't append\n"); + throw Error(ERR_BAD_PARAMETER); + } + tbl_[n_++] = &t; + return *this; + } + void init(const Xbyak::Reg64 *tbl, size_t n) + { + if (n > maxTblNum) { + fprintf(stderr, "ERR Pack::init bad n=%d\n", (int)n); + throw Error(ERR_BAD_PARAMETER); + } + n_ = n; + for (size_t i = 0; i < n; i++) { + tbl_[i] = &tbl[i]; + } + } + const Xbyak::Reg64& operator[](size_t n) const + { + if (n >= n_) { + fprintf(stderr, "ERR Pack bad n=%d(%d)\n", (int)n, (int)n_); + throw Error(ERR_BAD_PARAMETER); + } + return *tbl_[n]; + } + size_t size() const { return n_; } + /* + get tbl[pos, pos + num) + */ + Pack sub(size_t pos, size_t num = size_t(-1)) const + { + if (num == size_t(-1)) num = n_ - pos; + if (pos + num > n_) { + fprintf(stderr, "ERR Pack::sub bad pos=%d, num=%d\n", (int)pos, (int)num); + throw Error(ERR_BAD_PARAMETER); + } + Pack pack; + pack.n_ = num; + for (size_t i = 0; i < num; i++) { + pack.tbl_[i] = tbl_[pos + i]; + } + return pack; + } + void put() const + { + for (size_t i = 0; i < n_; i++) { + printf("%s ", tbl_[i]->toString()); + } + printf("\n"); + } +}; + +class StackFrame { +#ifdef XBYAK64_WIN + static const int noSaveNum = 6; + static const int rcxPos = 0; + static const int rdxPos = 1; +#else + static const int noSaveNum = 8; + static const int rcxPos = 3; + static const int rdxPos = 2; +#endif + static const int maxRegNum = 14; // maxRegNum = 16 - rsp - rax + Xbyak::CodeGenerator *code_; + int pNum_; + int tNum_; + bool useRcx_; + bool useRdx_; + int saveNum_; + int P_; + bool makeEpilog_; + Xbyak::Reg64 pTbl_[4]; + Xbyak::Reg64 tTbl_[maxRegNum]; + Pack p_; + Pack t_; + StackFrame(const StackFrame&); + void operator=(const StackFrame&); +public: + const Pack& p; + const Pack& t; + /* + make stack frame + @param sf [in] this + @param pNum [in] num of function parameter(0 <= pNum <= 4) + @param tNum [in] num of temporary register(0 <= tNum, with UseRCX, UseRDX) #{pNum + tNum [+rcx] + [rdx]} <= 14 + @param stackSizeByte [in] local stack size + @param makeEpilog [in] automatically call close() if true + + you can use + rax + gp0, ..., gp(pNum - 1) + gt0, ..., gt(tNum-1) + rcx if tNum & UseRCX + rdx if tNum & UseRDX + rsp[0..stackSizeByte - 1] + */ + StackFrame(Xbyak::CodeGenerator *code, int pNum, int tNum = 0, int stackSizeByte = 0, bool makeEpilog = true) + : code_(code) + , pNum_(pNum) + , tNum_(tNum & ~(UseRCX | UseRDX)) + , useRcx_((tNum & UseRCX) != 0) + , useRdx_((tNum & UseRDX) != 0) + , saveNum_(0) + , P_(0) + , makeEpilog_(makeEpilog) + , p(p_) + , t(t_) + { + using namespace Xbyak; + if (pNum < 0 || pNum > 4) throw Error(ERR_BAD_PNUM); + const int allRegNum = pNum + tNum_ + (useRcx_ ? 1 : 0) + (useRdx_ ? 1 : 0); + if (tNum_ < 0 || allRegNum > maxRegNum) throw Error(ERR_BAD_TNUM); + const Reg64& _rsp = code->rsp; + saveNum_ = (std::max)(0, allRegNum - noSaveNum); + const int *tbl = getOrderTbl() + noSaveNum; + for (int i = 0; i < saveNum_; i++) { + code->push(Reg64(tbl[i])); + } + P_ = (stackSizeByte + 7) / 8; + if (P_ > 0 && (P_ & 1) == (saveNum_ & 1)) P_++; // (rsp % 16) == 8, then increment P_ for 16 byte alignment + P_ *= 8; + if (P_ > 0) code->sub(_rsp, P_); + int pos = 0; + for (int i = 0; i < pNum; i++) { + pTbl_[i] = Xbyak::Reg64(getRegIdx(pos)); + } + for (int i = 0; i < tNum_; i++) { + tTbl_[i] = Xbyak::Reg64(getRegIdx(pos)); + } + if (useRcx_ && rcxPos < pNum) code_->mov(code_->r10, code_->rcx); + if (useRdx_ && rdxPos < pNum) code_->mov(code_->r11, code_->rdx); + p_.init(pTbl_, pNum); + t_.init(tTbl_, tNum_); + } + /* + make epilog manually + @param callRet [in] call ret() if true + */ + void close(bool callRet = true) + { + using namespace Xbyak; + const Reg64& _rsp = code_->rsp; + const int *tbl = getOrderTbl() + noSaveNum; + if (P_ > 0) code_->add(_rsp, P_); + for (int i = 0; i < saveNum_; i++) { + code_->pop(Reg64(tbl[saveNum_ - 1 - i])); + } + + if (callRet) code_->ret(); + } + ~StackFrame() + { + if (!makeEpilog_) return; + try { + close(); + } catch (std::exception& e) { + printf("ERR:StackFrame %s\n", e.what()); + exit(1); + } + } +private: + const int *getOrderTbl() const + { + using namespace Xbyak; + static const int tbl[] = { +#ifdef XBYAK64_WIN + Operand::RCX, Operand::RDX, Operand::R8, Operand::R9, Operand::R10, Operand::R11, Operand::RDI, Operand::RSI, +#else + Operand::RDI, Operand::RSI, Operand::RDX, Operand::RCX, Operand::R8, Operand::R9, Operand::R10, Operand::R11, +#endif + Operand::RBX, Operand::RBP, Operand::R12, Operand::R13, Operand::R14, Operand::R15 + }; + return &tbl[0]; + } + int getRegIdx(int& pos) const + { + assert(pos < maxRegNum); + using namespace Xbyak; + const int *tbl = getOrderTbl(); + int r = tbl[pos++]; + if (useRcx_) { + if (r == Operand::RCX) { return Operand::R10; } + if (r == Operand::R10) { r = tbl[pos++]; } + } + if (useRdx_) { + if (r == Operand::RDX) { return Operand::R11; } + if (r == Operand::R11) { return tbl[pos++]; } + } + return r; + } +}; +#endif + +} } // end of util +#endif |