From 638e47c04dca31c3434f88fccef8cc61315b6adf Mon Sep 17 00:00:00 2001
From: aroulin <andy.roulin@epfl.ch>
Date: Sun, 16 Aug 2015 11:51:21 +0200
Subject: [PATCH] Shader: implement EX2 and LG2 in interpreter
---
src/video_core/shader/shader_interpreter.cpp | 36 ++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/src/video_core/shader/shader_interpreter.cpp b/src/video_core/shader/shader_interpreter.cpp
index e14de07685..646171a195 100644
--- a/src/video_core/shader/shader_interpreter.cpp
+++ b/src/video_core/shader/shader_interpreter.cpp
@@ -334,6 +334,42 @@ void RunInterpreter(UnitState<Debug>& state) {
Record<DebugDataRecord::CMP_RESULT>(state.debug, iteration, state.conditional_code);
break;
+ case OpCode::Id::EX2:
+ {
+ Record<DebugDataRecord::SRC1>(state.debug, iteration, src1);
+ Record<DebugDataRecord::DEST_IN>(state.debug, iteration, dest);
+
+ // EX2 only takes first component exp2 and writes it to all dest components
+ float24 ex2_res = float24::FromFloat32(std::exp2(src1[0].ToFloat32()));
+ for (int i = 0; i < 4; ++i) {
+ if (!swizzle.DestComponentEnabled(i))
+ continue;
+
+ dest[i] = ex2_res;
+ }
+
+ Record<DebugDataRecord::DEST_OUT>(state.debug, iteration, dest);
+ break;
+ }
+
+ case OpCode::Id::LG2:
+ {
+ Record<DebugDataRecord::SRC1>(state.debug, iteration, src1);
+ Record<DebugDataRecord::DEST_IN>(state.debug, iteration, dest);
+
+ // LG2 only takes the first component log2 and writes it to all dest components
+ float24 lg2_res = float24::FromFloat32(std::log2(src1[0].ToFloat32()));
+ for (int i = 0; i < 4; ++i) {
+ if (!swizzle.DestComponentEnabled(i))
+ continue;
+
+ dest[i] = lg2_res;
+ }
+
+ Record<DebugDataRecord::DEST_OUT>(state.debug, iteration, dest);
+ break;
+ }
+
default:
LOG_ERROR(HW_GPU, "Unhandled arithmetic instruction: 0x%02x (%s): 0x%08x",
(int)instr.opcode.Value().EffectiveOpCode(), instr.opcode.Value().GetInfo().name, instr.hex);