simx directory name fix

2021-11-30 07:17:58 -05:00
parent 41d7e6c63a
commit 2a7a4df342
48 changed files with 20 additions and 69 deletions
--- a/sim/simx/tex_unit.cpp
+++ b/sim/simx/tex_unit.cpp
@@ -0,0 +1,92 @@
+#include "tex_unit.h"
+#include "core.h"
+#include <texturing.h>
+#include <VX_config.h>
+
+using namespace vortex;
+using namespace cocogfx;
+
+enum class FilterMode {
+  Point,
+  Bilinear,
+  Trilinear,
+};
+
+TexUnit::TexUnit(Core* core) : core_(core) {}
+
+TexUnit::~TexUnit() {}
+
+uint32_t TexUnit::get_state(uint32_t state) {
+  return states_.at(state);
+}
+  
+void TexUnit::set_state(uint32_t state, uint32_t value) {
+  states_.at(state) = value;
+}
+
+uint32_t TexUnit::read(int32_t u, 
+                       int32_t v, 
+                       int32_t lod, 
+                       std::vector<mem_addr_size_t>* mem_addrs) {
+  //--
+  auto xu = Fixed<TEX_FXD_FRAC>::make(u);
+  auto xv = Fixed<TEX_FXD_FRAC>::make(v);
+  uint32_t base_addr  = states_.at(TEX_STATE_ADDR) + states_.at(TEX_STATE_MIPOFF(lod));
+  uint32_t log_width  = std::max<int32_t>(states_.at(TEX_STATE_WIDTH) - lod, 0);
+  uint32_t log_height = std::max<int32_t>(states_.at(TEX_STATE_HEIGHT) - lod, 0);
+  auto format         = (TexFormat)states_.at(TEX_STATE_FORMAT);    
+  auto filter         = (FilterMode)states_.at(TEX_STATE_FILTER);    
+  auto wrapu          = (WrapMode)states_.at(TEX_STATE_WRAPU);
+  auto wrapv          = (WrapMode)states_.at(TEX_STATE_WRAPV);
+
+  auto stride = Stride(format);
+  
+  switch (filter) {
+  case FilterMode::Bilinear: {
+    // addressing
+    uint32_t offset00, offset01, offset10, offset11;
+    uint32_t alpha, beta;
+    TexAddressLinear(xu, xv, log_width, log_height, wrapu, wrapv, 
+      &offset00, &offset01, &offset10, &offset11, &alpha, &beta);
+
+    uint32_t addr00 = base_addr + offset00 * stride;
+    uint32_t addr01 = base_addr + offset01 * stride;
+    uint32_t addr10 = base_addr + offset10 * stride;
+    uint32_t addr11 = base_addr + offset11 * stride;
+
+    // memory lookup
+    uint32_t texel00 = core_->dcache_read(addr00, stride);
+    uint32_t texel01 = core_->dcache_read(addr01, stride);
+    uint32_t texel10 = core_->dcache_read(addr10, stride);
+    uint32_t texel11 = core_->dcache_read(addr11, stride);
+
+    mem_addrs->push_back({addr00, stride});
+    mem_addrs->push_back({addr01, stride});
+    mem_addrs->push_back({addr10, stride});
+    mem_addrs->push_back({addr11, stride});
+
+    // filtering
+    auto color = TexFilterLinear(
+      format, texel00, texel01, texel10, texel11, alpha, beta);
+    return color;
+  }
+  case FilterMode::Point: {
+    // addressing
+    uint32_t offset;
+    TexAddressPoint(xu, xv, log_width, log_height, wrapu, wrapv, &offset);
+    
+    uint32_t addr = base_addr + offset * stride;
+
+    // memory lookup
+    uint32_t texel = core_->dcache_read(addr, stride);
+    mem_addrs->push_back({addr, stride});
+
+    // filtering
+    auto color = TexFilterPoint(format, texel);
+    return color;
+  }
+  default:
+    std::abort();
+    return 0;
+  }
+}