d4r: official NVIDIA DLSS on AMD GPUs under Linux and Proton

scripts/build_zluda_ptx_helpers.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+ZLUDA_SOURCE_ROOT="${ZLUDA_SOURCE_ROOT:-}"
+ROCM_ROOT="${ROCM_ROOT:-/opt/rocm}"
+HIPCC="${HIPCC:-$ROCM_ROOT/bin/hipcc}"
+LLVM_DIS="${LLVM_DIS:-$ROCM_ROOT/lib/llvm/bin/llvm-dis}"
+LLVM_AS="${LLVM_AS:-$ROCM_ROOT/lib/llvm/bin/llvm-as}"
+OCML="${OCML:-$ROCM_ROOT/amdgcn/bitcode/ocml.bc}"
+WORK_ROOT="${D4R_ZLUDA_PTX_HELPER_WORK:-${TMPDIR:-/tmp}/d4r-zluda-ptx-helpers}"
+
+if [[ -z "$ZLUDA_SOURCE_ROOT" || ! -f "$ZLUDA_SOURCE_ROOT/ptx/lib/zluda_ptx_impl.cpp" ]]; then
+  printf 'Set ZLUDA_SOURCE_ROOT to a ZLUDA source checkout\n' >&2
+  exit 2
+fi
+for dependency in "$HIPCC" "$LLVM_DIS" "$LLVM_AS" "$OCML"; do
+  if [[ ! -e "$dependency" ]]; then
+    printf 'Required ROCm/LLVM helper is missing: %s\n' "$dependency" >&2
+    exit 2
+  fi
+done
+
+mkdir -p "$WORK_ROOT"
+SOURCE="$ZLUDA_SOURCE_ROOT/ptx/lib/zluda_ptx_impl.cpp"
+PTX_LIB="$ZLUDA_SOURCE_ROOT/ptx/lib"
+COMMON_FLAGS=(-DHIP_ENABLE_WARP_SYNC_BUILTINS -std=c++20 -Xclang -fdenormal-fp-math=dynamic
+  -Wall -Wextra -Wsign-compare -Wconversion -x hip "$SOURCE" -nogpulib -O3
+  -mno-wavefrontsize64 --offload-device-only --offload-arch=gfx1030 -emit-llvm -c
+  -Xclang -mlink-bitcode-file -Xclang "$OCML")
+
+build_one() {
+  local suffix="$1"
+  shift
+  local raw="$WORK_ROOT/zluda_ptx_impl${suffix}.raw.bc"
+  local clean="$WORK_ROOT/zluda_ptx_impl${suffix}.clean.bc"
+  local ll="$WORK_ROOT/zluda_ptx_impl${suffix}.ll"
+  local output="$PTX_LIB/zluda_ptx_impl${suffix}.bc"
+
+  "$HIPCC" "${COMMON_FLAGS[@]}" "$@" -o "$raw"
+  "$LLVM_DIS" "$raw" -o "$ll"
+  sed -E \
+      -e '/@llvm.used/d' \
+      -e '/wchar_size/d' \
+      -e '/llvm.module.flags/d' \
+      -e '/__hip_cuid/d' \
+      -e 's/optnone//g' \
+      -e 's/define hidden/define linkonce_odr/g' \
+      -e 's/"target-cpu"="gfx1030"//g' \
+      -e 's/"target-features"="[^"]+"//g' "$ll" |
+    "$LLVM_AS" -o "$clean" -
+  mv "$clean" "$output"
+  printf 'Wrote %s (%s bytes)\n' "$output" "$(stat -c '%s' "$output")"
+}
+
+build_one ""
+build_one "_constrained" -ffp-model=strict -ffp-exception-behavior=ignore