feat: add d4r inference engines and Windows parity tooling

Add native K/M/RR inference engines, HIP kernels, replay and validation
harnesses, and Windows DLSS setup and runtime support. Include GPU
profiling tools, build and packaging scripts, platform integration
patches, and implementation documentation.

engine/rr/enc0_m_decl.glsl

@@ -0,0 +1,79 @@
+// Native part of engine/rr/enc0_m.comp (generated by engine/rr/gen_enc0_m.py): declarations, after the translated
+// header. Binding 1 holds NGX's weight image followed by engine/rr/enc0_pack.py's blob (offsets in enc0_m_w.h already
+// include its base); binding 2 is the arena.
+#extension GL_EXT_shader_8bit_storage : require
+#extension GL_KHR_shader_subgroup_vote : require
+#extension GL_EXT_control_flow_attributes : require
+#extension GL_GOOGLE_include_directive : require
+#include "enc0_m_w.h"
+#include "rr_exact.glsl"
+#ifndef RR_GFX11
+layout(set = 0, binding = 1, std430) readonly buffer W8 { floate4m3_t w[]; } w8;
+#endif
+layout(set = 0, binding = 1, std430) readonly buffer W16 { float16_t w[]; } w16;
+layout(set = 0, binding = 1, std430) readonly buffer W16U { uint16_t w[]; } w16u;
+layout(set = 0, binding = 1, std430) readonly buffer W8U { uint8_t w[]; } w8u;
+layout(set = 0, binding = 2, std430) buffer Arena { uint w[]; } arena;
+#define ACC coopmat<float, gl_ScopeSubgroup, 16, 16, gl_MatrixUseAccumulator>
+#define HAC coopmat<float16_t, gl_ScopeSubgroup, 16, 16, gl_MatrixUseAccumulator>
+#ifndef RR_GFX11
+#define A8 coopmat<floate4m3_t, gl_ScopeSubgroup, 16, 16, gl_MatrixUseA>
+#define B8 coopmat<floate4m3_t, gl_ScopeSubgroup, 16, 16, gl_MatrixUseB>
+#endif
+#define RM gl_CooperativeMatrixLayoutRowMajor
+#define CM gl_CooperativeMatrixLayoutColumnMajor
+#ifdef RR_GFX11
+#include "rr_gfx11_k32.glsl"
+#else
+#define LDA(dst, base, k, mt, kt) coopMatLoad((dst), w8.w, (base) + 256u * ((mt) * ((k) / 16u) + (kt)), 16u, RM)
+#define LDB(dst, base, n, kt, nt) coopMatLoad((dst), w8.w, (base) + 256u * ((kt) * ((n) / 16u) + (nt)), 16u, RM)
+#define RND(m) [[unroll]] for (int i_ = 0; i_ < 8; ++i_) (m)[i_] = rnd16((m)[i_]);
+#define Q8(dst, src) Q8PAIRS(dst, src)
+// One 32-deep step onto an accumulator that holds binary16 values. The reference (and the default here) adds the
+// accumulator inside the f32 products and rounds the result to binary16. RR_MIX (build_native_model.sh with
+// D4R_RR_MIX=1) keeps the accumulator as binary16, sums the products from zero and takes f16(P + acc), which the
+// driver compiles to one v_fma_mix per element in place of two conversions: about 5% faster, but a single rounding
+// where the reference has two, so a value can come out one binary16 step away (engine/rr/README.md).
+// RAC is the accumulator type, RV(x) a binary16 value as its element; K32H is the step on a binary16 matrix.
+#ifdef RR_MIX
+#define RAC HAC
+#define RV(x) (x)
+#define K32(acc, a0, b0, a1, b1) { ACC p_ = coopMatMulAdd((a1), (b1), coopMatMulAdd((a0), (b0), ACC(0.0))); [[unroll]] for (int i_ = 0; i_ < 8; ++i_) (acc)[i_] = float16_t(p_[i_] + float((acc)[i_])); }
+#define K32H(acc, a0, b0, a1, b1) K32(acc, a0, b0, a1, b1)
+#else
+#define RAC ACC
+#define RV(x) float(x)
+#define K32(acc, a0, b0, a1, b1) { (acc) = coopMatMulAdd((a1), (b1), coopMatMulAdd((a0), (b0), (acc))); RND(acc) }
+#define K32H(acc, a0, b0, a1, b1) { ACC p_ = coopMatMulAdd((a1), (b1), coopMatMulAdd((a0), (b0), ACC(acc))); [[unroll]] for (int i_ = 0; i_ < 8; ++i_) (acc)[i_] = float16_t(p_[i_]); }
+#endif
+#endif
+const uint HEAD = W_WK1 - W_WK0, BRANCH = W_W1_1 - W_W1_0;
+shared uint KVS[2 * 768];        // the current head's K, then V^T; before the attention the key pixels' features
+#define XF KVS                   // the key pixels' 32 FP8 features (plane 0 | plane 1), slot-major
+shared uint XT[96 * 8];          // the normalised key tokens
+#define RR_KS KVS
+#define RR_KS0 0u
+#define RR_VS KVS
+#define RR_VS0 768u
+#define MG XT                    // the merge rows (16 x 128 FP8) reuse XT
+shared float16_t O112[64 * 4];   // surface 112 per token, for surface 128's 2x2 sums
+ivec2 keyXY(uint t, int x0, int y0)
+{
+    if (t < 64u) return ivec2(x0 + int(t & 7u), y0 + int(t >> 3u));
+    const int i = int(t & 7u), side = int((t - 64u) >> 3u);
+    return ivec2(side < 2 ? x0 + i : (side == 2 ? x0 - 1 : x0 + 8), side == 0 ? y0 - 1 : (side == 1 ? y0 + 8 : y0 + i));
+}
+#ifndef RR_GFX11
+uint pack4(floate4m3_t a, floate4m3_t b, floate4m3_t c, floate4m3_t d)
+{
+    return code(a) | (code(b) << 8u) | (code(c) << 16u) | (code(d) << 24u);
+}
+#endif
+uvec2 mergeXY(uint r) { return r < 8u ? uvec2(r >> 1u, r & 1u) : uvec2((r - 8u) >> 1u, 2u + (r & 1u)); }
+// the translated prologue's shared buffer sh: input_noise (10 x 10 pixels, 4 f16) at byte 0, input_tensor (two planes
+// of 10 x 10 pixels x 16 FP8 features) at byte 800
+float16_t noiseAt(uint gx, uint gy, uint c)
+{
+    const uint b = 80u * gy + 8u * gx + 2u * c;
+    return hb((sh[b >> 2] >> (8u * (b & 2u))) & 0xffffu);
+}