From cf4ecc1945acd7c26845f2083d2fc118f5dcac1c Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Fri, 29 Mar 2019 18:36:07 -0300 Subject: [PATCH] shader_ir: Implement immediate register tracking --- src/video_core/shader/shader_ir.h | 3 +++ src/video_core/shader/track.cpp | 17 ++++++++++++++++- 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h index 5bc3a39004..7a4a231dc4 100644 --- a/src/video_core/shader/shader_ir.h +++ b/src/video_core/shader/shader_ir.h @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -773,6 +774,8 @@ private: Node TrackCbuf(Node tracked, const NodeBlock& code, s64 cursor); + std::optional TrackImmediate(Node tracked, const NodeBlock& code, s64 cursor); + std::pair TrackRegister(const GprNode* tracked, const NodeBlock& code, s64 cursor); template diff --git a/src/video_core/shader/track.cpp b/src/video_core/shader/track.cpp index 33b071747b..4505667ff8 100644 --- a/src/video_core/shader/track.cpp +++ b/src/video_core/shader/track.cpp @@ -6,6 +6,7 @@ #include #include +#include "common/common_types.h" #include "video_core/shader/shader_ir.h" namespace VideoCommon::Shader { @@ -14,7 +15,7 @@ namespace { std::pair FindOperation(const NodeBlock& code, s64 cursor, OperationCode operation_code) { for (; cursor >= 0; --cursor) { - const Node node = code[cursor]; + const Node node = code.at(cursor); if (const auto operation = std::get_if(node)) { if (operation->GetCode() == operation_code) return {node, cursor}; @@ -64,6 +65,20 @@ Node ShaderIR::TrackCbuf(Node tracked, const NodeBlock& code, s64 cursor) { return nullptr; } +std::optional ShaderIR::TrackImmediate(Node tracked, const NodeBlock& code, s64 cursor) { + // Reduce the cursor in one to avoid infinite loops when the instruction sets the same register + // that it uses as operand + const auto [found, found_cursor] = + TrackRegister(&std::get(*tracked), code, cursor - 1); + if (!found) { + return {}; + } + if (const auto immediate = std::get_if(found)) { + return immediate->GetValue(); + } + return {}; +} + std::pair ShaderIR::TrackRegister(const GprNode* tracked, const NodeBlock& code, s64 cursor) { for (; cursor >= 0; --cursor) {