/*
* This file is part of the GROMACS molecular simulation package.
*
- * Copyright (c) 2014,2015,2016,2017,2018, by the GROMACS development team, led by
+ * Copyright (c) 2014,2015,2016,2017,2018,2019, by the GROMACS development team, led by
* Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
* and including many others, as listed in the AUTHORS file in the
* top-level source directory and at http://www.gromacs.org.
// On MIC it is better to use scatter operations, so we define the load routines
// that use a SIMD offset variable first.
-template <int align>
-static inline void gmx_simdcall
-gatherLoadBySimdIntTranspose(const float * base,
- SimdFInt32 simdoffset,
- SimdFloat * v0,
- SimdFloat * v1,
- SimdFloat * v2,
- SimdFloat * v3)
+template<int align>
+static inline void gmx_simdcall gatherLoadBySimdIntTranspose(const float* base,
+ SimdFInt32 simdoffset,
+ SimdFloat* v0,
+ SimdFloat* v1,
+ SimdFloat* v2,
+ SimdFloat* v3)
{
assert(std::size_t(base) % 16 == 0);
assert(align % 4 == 0);
simdoffset = simdoffset * SimdFInt32(align);
}
- v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
- v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+1, sizeof(float));
- v2->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+2, sizeof(float));
- v3->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+3, sizeof(float));
+ v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
+ v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 1, sizeof(float));
+ v2->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 2, sizeof(float));
+ v3->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 3, sizeof(float));
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-gatherLoadUBySimdIntTranspose(const float * base,
- SimdFInt32 simdoffset,
- SimdFloat * v0,
- SimdFloat * v1)
+ gatherLoadUBySimdIntTranspose(const float* base, SimdFInt32 simdoffset, SimdFloat* v0, SimdFloat* v1)
{
// All instructions might be latency ~4 on MIC, so we use shifts where we
// only need a single instruction (since the shift parameter is an immediate),
// which can take constants up to 8 in total.
if (align == 2)
{
- v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, align * sizeof(float));
- v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+1, align * sizeof(float));
+ v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, align * sizeof(float));
+ v1->simdInternal_ =
+ _mm512_i32gather_ps(simdoffset.simdInternal_, base + 1, align * sizeof(float));
}
else
{
{
simdoffset = simdoffset * SimdFInt32(align);
}
- v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
- v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+1, sizeof(float));
+ v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
+ v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 1, sizeof(float));
}
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-gatherLoadBySimdIntTranspose(const float * base,
- SimdFInt32 simdoffset,
- SimdFloat * v0,
- SimdFloat * v1)
+ gatherLoadBySimdIntTranspose(const float* base, SimdFInt32 simdoffset, SimdFloat* v0, SimdFloat* v1)
{
assert(std::size_t(base) % 8 == 0);
assert(align % 2 == 0);
gatherLoadUBySimdIntTranspose<align>(base, simdoffset, v0, v1);
}
-template <int align>
-static inline void gmx_simdcall
-gatherLoadTranspose(const float * base,
- const std::int32_t offset[],
- SimdFloat * v0,
- SimdFloat * v1,
- SimdFloat * v2,
- SimdFloat * v3)
+template<int align>
+static inline void gmx_simdcall gatherLoadTranspose(const float* base,
+ const std::int32_t offset[],
+ SimdFloat* v0,
+ SimdFloat* v1,
+ SimdFloat* v2,
+ SimdFloat* v3)
{
gatherLoadBySimdIntTranspose<align>(base, simdLoad(offset, SimdFInt32Tag()), v0, v1, v2, v3);
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-gatherLoadTranspose(const float * base,
- const std::int32_t offset[],
- SimdFloat * v0,
- SimdFloat * v1)
+ gatherLoadTranspose(const float* base, const std::int32_t offset[], SimdFloat* v0, SimdFloat* v1)
{
gatherLoadBySimdIntTranspose<align>(base, simdLoad(offset, SimdFInt32Tag()), v0, v1);
}
static const int c_simdBestPairAlignmentFloat = 2;
-template <int align>
-static inline void gmx_simdcall
-gatherLoadUTranspose(const float * base,
- const std::int32_t offset[],
- SimdFloat * v0,
- SimdFloat * v1,
- SimdFloat * v2)
+template<int align>
+static inline void gmx_simdcall gatherLoadUTranspose(const float* base,
+ const std::int32_t offset[],
+ SimdFloat* v0,
+ SimdFloat* v1,
+ SimdFloat* v2)
{
SimdFInt32 simdoffset;
simdoffset = simdoffset * SimdFInt32(align);
}
- v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
- v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+1, sizeof(float));
- v2->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base+2, sizeof(float));
+ v0->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base, sizeof(float));
+ v1->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 1, sizeof(float));
+ v2->simdInternal_ = _mm512_i32gather_ps(simdoffset.simdInternal_, base + 2, sizeof(float));
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-transposeScatterStoreU(float * base,
- const std::int32_t offset[],
- SimdFloat v0,
- SimdFloat v1,
- SimdFloat v2)
+ transposeScatterStoreU(float* base, const std::int32_t offset[], SimdFloat v0, SimdFloat v1, SimdFloat v2)
{
SimdFInt32 simdoffset;
simdoffset = simdoffset * SimdFInt32(align);
}
- _mm512_i32scatter_ps(base, simdoffset.simdInternal_, v0.simdInternal_, sizeof(float));
- _mm512_i32scatter_ps(base+1, simdoffset.simdInternal_, v1.simdInternal_, sizeof(float));
- _mm512_i32scatter_ps(base+2, simdoffset.simdInternal_, v2.simdInternal_, sizeof(float));
+ _mm512_i32scatter_ps(base, simdoffset.simdInternal_, v0.simdInternal_, sizeof(float));
+ _mm512_i32scatter_ps(base + 1, simdoffset.simdInternal_, v1.simdInternal_, sizeof(float));
+ _mm512_i32scatter_ps(base + 2, simdoffset.simdInternal_, v2.simdInternal_, sizeof(float));
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-transposeScatterIncrU(float * base,
- const std::int32_t offset[],
- SimdFloat v0,
- SimdFloat v1,
- SimdFloat v2)
+ transposeScatterIncrU(float* base, const std::int32_t offset[], SimdFloat v0, SimdFloat v1, SimdFloat v2)
{
- alignas(GMX_SIMD_ALIGNMENT) float rdata0[GMX_SIMD_FLOAT_WIDTH];
- alignas(GMX_SIMD_ALIGNMENT) float rdata1[GMX_SIMD_FLOAT_WIDTH];
- alignas(GMX_SIMD_ALIGNMENT) float rdata2[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata0[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata1[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata2[GMX_SIMD_FLOAT_WIDTH];
store(rdata0, v0);
store(rdata1, v1);
for (int i = 0; i < GMX_SIMD_FLOAT_WIDTH; i++)
{
- base[ align * offset[i] + 0] += rdata0[i];
- base[ align * offset[i] + 1] += rdata1[i];
- base[ align * offset[i] + 2] += rdata2[i];
+ base[align * offset[i] + 0] += rdata0[i];
+ base[align * offset[i] + 1] += rdata1[i];
+ base[align * offset[i] + 2] += rdata2[i];
}
}
-template <int align>
+template<int align>
static inline void gmx_simdcall
-transposeScatterDecrU(float * base,
- const std::int32_t offset[],
- SimdFloat v0,
- SimdFloat v1,
- SimdFloat v2)
+ transposeScatterDecrU(float* base, const std::int32_t offset[], SimdFloat v0, SimdFloat v1, SimdFloat v2)
{
- alignas(GMX_SIMD_ALIGNMENT) float rdata0[GMX_SIMD_FLOAT_WIDTH];
- alignas(GMX_SIMD_ALIGNMENT) float rdata1[GMX_SIMD_FLOAT_WIDTH];
- alignas(GMX_SIMD_ALIGNMENT) float rdata2[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata0[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata1[GMX_SIMD_FLOAT_WIDTH];
+ alignas(GMX_SIMD_ALIGNMENT) float rdata2[GMX_SIMD_FLOAT_WIDTH];
store(rdata0, v0);
store(rdata1, v1);
for (int i = 0; i < GMX_SIMD_FLOAT_WIDTH; i++)
{
- base[ align * offset[i] + 0] -= rdata0[i];
- base[ align * offset[i] + 1] -= rdata1[i];
- base[ align * offset[i] + 2] -= rdata2[i];
+ base[align * offset[i] + 0] -= rdata0[i];
+ base[align * offset[i] + 1] -= rdata1[i];
+ base[align * offset[i] + 2] -= rdata2[i];
}
}
-static inline void gmx_simdcall
-expandScalarsToTriplets(SimdFloat scalar,
- SimdFloat * triplets0,
- SimdFloat * triplets1,
- SimdFloat * triplets2)
+static inline void gmx_simdcall expandScalarsToTriplets(SimdFloat scalar,
+ SimdFloat* triplets0,
+ SimdFloat* triplets1,
+ SimdFloat* triplets2)
{
- triplets0->simdInternal_ = _mm512_castsi512_ps(_mm512_permutevar_epi32(_mm512_set_epi32(5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 0, 0, 0),
- _mm512_castps_si512(scalar.simdInternal_)));
- triplets1->simdInternal_ = _mm512_castsi512_ps(_mm512_permutevar_epi32(_mm512_set_epi32(10, 10, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5),
- _mm512_castps_si512(scalar.simdInternal_)));
- triplets2->simdInternal_ = _mm512_castsi512_ps(_mm512_permutevar_epi32(_mm512_set_epi32(15, 15, 15, 14, 14, 14, 13, 13, 13, 12, 12, 12, 11, 11, 11, 10),
- _mm512_castps_si512(scalar.simdInternal_)));
+ triplets0->simdInternal_ = _mm512_castsi512_ps(
+ _mm512_permutevar_epi32(_mm512_set_epi32(5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 0, 0, 0),
+ _mm512_castps_si512(scalar.simdInternal_)));
+ triplets1->simdInternal_ = _mm512_castsi512_ps(_mm512_permutevar_epi32(
+ _mm512_set_epi32(10, 10, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5),
+ _mm512_castps_si512(scalar.simdInternal_)));
+ triplets2->simdInternal_ = _mm512_castsi512_ps(_mm512_permutevar_epi32(
+ _mm512_set_epi32(15, 15, 15, 14, 14, 14, 13, 13, 13, 12, 12, 12, 11, 11, 11, 10),
+ _mm512_castps_si512(scalar.simdInternal_)));
}
-static inline float gmx_simdcall
-reduceIncr4ReturnSum(float * m,
- SimdFloat v0,
- SimdFloat v1,
- SimdFloat v2,
- SimdFloat v3)
+static inline float gmx_simdcall reduceIncr4ReturnSum(float* m, SimdFloat v0, SimdFloat v1, SimdFloat v2, SimdFloat v3)
{
float f;
__m512 t0, t1, t2, t3;
assert(std::size_t(m) % 16 == 0);
t0 = _mm512_add_ps(v0.simdInternal_, _mm512_swizzle_ps(v0.simdInternal_, _MM_SWIZ_REG_BADC));
- t0 = _mm512_mask_add_ps(t0, _mm512_int2mask(0xCCCC), v2.simdInternal_, _mm512_swizzle_ps(v2.simdInternal_, _MM_SWIZ_REG_BADC));
+ t0 = _mm512_mask_add_ps(t0, _mm512_int2mask(0xCCCC), v2.simdInternal_,
+ _mm512_swizzle_ps(v2.simdInternal_, _MM_SWIZ_REG_BADC));
t1 = _mm512_add_ps(v1.simdInternal_, _mm512_swizzle_ps(v1.simdInternal_, _MM_SWIZ_REG_BADC));
- t1 = _mm512_mask_add_ps(t1, _mm512_int2mask(0xCCCC), v3.simdInternal_, _mm512_swizzle_ps(v3.simdInternal_, _MM_SWIZ_REG_BADC));
+ t1 = _mm512_mask_add_ps(t1, _mm512_int2mask(0xCCCC), v3.simdInternal_,
+ _mm512_swizzle_ps(v3.simdInternal_, _MM_SWIZ_REG_BADC));
t2 = _mm512_add_ps(t0, _mm512_swizzle_ps(t0, _MM_SWIZ_REG_CDAB));
t2 = _mm512_mask_add_ps(t2, _mm512_int2mask(0xAAAA), t1, _mm512_swizzle_ps(t1, _MM_SWIZ_REG_CDAB));
t2 = _mm512_add_ps(t2, _mm512_permute4f128_ps(t2, _MM_PERM_BADC));
t2 = _mm512_add_ps(t2, _mm512_permute4f128_ps(t2, _MM_PERM_CDAB));
- t0 = _mm512_mask_extload_ps(_mm512_undefined_ps(), _mm512_int2mask(0xF), m, _MM_UPCONV_PS_NONE, _MM_BROADCAST_4X16, _MM_HINT_NONE);
+ t0 = _mm512_mask_extload_ps(_mm512_undefined_ps(), _mm512_int2mask(0xF), m, _MM_UPCONV_PS_NONE,
+ _MM_BROADCAST_4X16, _MM_HINT_NONE);
t0 = _mm512_add_ps(t0, t2);
_mm512_mask_packstorelo_ps(m, _mm512_int2mask(0xF), t0);
return f;
}
-static inline SimdFloat gmx_simdcall
-loadDualHsimd(const float * m0,
- const float * m1)
+static inline SimdFloat gmx_simdcall loadDualHsimd(const float* m0, const float* m1)
{
assert(std::size_t(m0) % 32 == 0);
assert(std::size_t(m1) % 32 == 0);
- return _mm512_castpd_ps(_mm512_mask_extload_pd(_mm512_extload_pd(reinterpret_cast<const double *>(m0), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE),
- _mm512_int2mask(0xF0), reinterpret_cast<const double *>(m1), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
+ return _mm512_castpd_ps(_mm512_mask_extload_pd(
+ _mm512_extload_pd(reinterpret_cast<const double*>(m0), _MM_UPCONV_PD_NONE,
+ _MM_BROADCAST_4X8, _MM_HINT_NONE),
+ _mm512_int2mask(0xF0), reinterpret_cast<const double*>(m1), _MM_UPCONV_PD_NONE,
+ _MM_BROADCAST_4X8, _MM_HINT_NONE));
}
-static inline SimdFloat gmx_simdcall
-loadDuplicateHsimd(const float * m)
+static inline SimdFloat gmx_simdcall loadDuplicateHsimd(const float* m)
{
assert(std::size_t(m) % 32 == 0);
- return _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double *>(m), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
+ return _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double*>(m),
+ _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
}
-static inline SimdFloat gmx_simdcall
-loadU1DualHsimd(const float * m)
+static inline SimdFloat gmx_simdcall loadU1DualHsimd(const float* m)
{
- return _mm512_mask_extload_ps(_mm512_extload_ps(m, _MM_UPCONV_PS_NONE, _MM_BROADCAST_1X16, _MM_HINT_NONE), _mm512_int2mask(0xFF00),
- m+1, _MM_UPCONV_PS_NONE, _MM_BROADCAST_1X16, _MM_HINT_NONE);
+ return _mm512_mask_extload_ps(
+ _mm512_extload_ps(m, _MM_UPCONV_PS_NONE, _MM_BROADCAST_1X16, _MM_HINT_NONE),
+ _mm512_int2mask(0xFF00), m + 1, _MM_UPCONV_PS_NONE, _MM_BROADCAST_1X16, _MM_HINT_NONE);
}
-static inline void gmx_simdcall
-storeDualHsimd(float * m0,
- float * m1,
- SimdFloat a)
+static inline void gmx_simdcall storeDualHsimd(float* m0, float* m1, SimdFloat a)
{
__m512 t0;
_mm512_mask_packstorelo_ps(m1, _mm512_int2mask(0xFF00), a.simdInternal_);
}
-static inline void gmx_simdcall
-incrDualHsimd(float * m0,
- float * m1,
- SimdFloat a)
+static inline void gmx_simdcall incrDualHsimd(float* m0, float* m1, SimdFloat a)
{
assert(std::size_t(m0) % 32 == 0);
assert(std::size_t(m1) % 32 == 0);
__m512 x;
// Update lower half
- x = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double *>(m0), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
+ x = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double*>(m0), _MM_UPCONV_PD_NONE,
+ _MM_BROADCAST_4X8, _MM_HINT_NONE));
x = _mm512_add_ps(x, a.simdInternal_);
_mm512_mask_packstorelo_ps(m0, _mm512_int2mask(0x00FF), x);
// Update upper half
- x = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double *>(m1), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
+ x = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double*>(m1), _MM_UPCONV_PD_NONE,
+ _MM_BROADCAST_4X8, _MM_HINT_NONE));
x = _mm512_add_ps(x, a.simdInternal_);
_mm512_mask_packstorelo_ps(m1, _mm512_int2mask(0xFF00), x);
}
-static inline void gmx_simdcall
-decrHsimd(float * m,
- SimdFloat a)
+static inline void gmx_simdcall decrHsimd(float* m, SimdFloat a)
{
__m512 t;
assert(std::size_t(m) % 32 == 0);
- t = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double *>(m), _MM_UPCONV_PD_NONE, _MM_BROADCAST_4X8, _MM_HINT_NONE));
+ t = _mm512_castpd_ps(_mm512_extload_pd(reinterpret_cast<const double*>(m), _MM_UPCONV_PD_NONE,
+ _MM_BROADCAST_4X8, _MM_HINT_NONE));
a = _mm512_add_ps(a.simdInternal_, _mm512_permute4f128_ps(a.simdInternal_, _MM_PERM_BADC));
t = _mm512_sub_ps(t, a.simdInternal_);
_mm512_mask_packstorelo_ps(m, _mm512_int2mask(0x00FF), t);
}
-template <int align>
-static inline void gmx_simdcall
-gatherLoadTransposeHsimd(const float * base0,
- const float * base1,
- const std::int32_t offset[],
- SimdFloat * v0,
- SimdFloat * v1)
+template<int align>
+static inline void gmx_simdcall gatherLoadTransposeHsimd(const float* base0,
+ const float* base1,
+ const std::int32_t offset[],
+ SimdFloat* v0,
+ SimdFloat* v1)
{
__m512i idx0, idx1, idx;
__m512 tmp1, tmp2;
v1->simdInternal_ = _mm512_mask_permute4f128_ps(tmp2, _mm512_int2mask(0x00FF), tmp1, _MM_PERM_DCDC);
}
-static inline float gmx_simdcall
-reduceIncr4ReturnSumHsimd(float * m,
- SimdFloat v0,
- SimdFloat v1)
+static inline float gmx_simdcall reduceIncr4ReturnSumHsimd(float* m, SimdFloat v0, SimdFloat v1)
{
float f;
__m512 t0, t1;
assert(std::size_t(m) % 32 == 0);
t0 = _mm512_add_ps(v0.simdInternal_, _mm512_swizzle_ps(v0.simdInternal_, _MM_SWIZ_REG_BADC));
- t0 = _mm512_mask_add_ps(t0, _mm512_int2mask(0xCCCC), v1.simdInternal_, _mm512_swizzle_ps(v1.simdInternal_, _MM_SWIZ_REG_BADC));
+ t0 = _mm512_mask_add_ps(t0, _mm512_int2mask(0xCCCC), v1.simdInternal_,
+ _mm512_swizzle_ps(v1.simdInternal_, _MM_SWIZ_REG_BADC));
t0 = _mm512_add_ps(t0, _mm512_swizzle_ps(t0, _MM_SWIZ_REG_CDAB));
t0 = _mm512_add_ps(t0, _mm512_castpd_ps(_mm512_swizzle_pd(_mm512_castps_pd(t0), _MM_SWIZ_REG_BADC)));
t0 = _mm512_mask_permute4f128_ps(t0, _mm512_int2mask(0xAAAA), t0, _MM_PERM_BADC);
- t1 = _mm512_mask_extload_ps(_mm512_undefined_ps(), _mm512_int2mask(0xF), m, _MM_UPCONV_PS_NONE, _MM_BROADCAST_4X16, _MM_HINT_NONE);
+ t1 = _mm512_mask_extload_ps(_mm512_undefined_ps(), _mm512_int2mask(0xF), m, _MM_UPCONV_PS_NONE,
+ _MM_BROADCAST_4X16, _MM_HINT_NONE);
t1 = _mm512_add_ps(t1, t0);
_mm512_mask_packstorelo_ps(m, _mm512_int2mask(0xF), t1);
return f;
}
-} // namespace gmx
+} // namespace gmx
#endif // GMX_SIMD_IMPL_X86_MIC_UTIL_FLOAT_H
biod.pnpi.spb.ru / alexxy / gromacs.git / blobdiff