From c4fd6b55bc9acd06b2fc89f84fd175d78e14110a Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 10 May 2021 18:21:28 -0300
Subject: glasm: Implement shuffle and vote instructions on GLASM

---
 .../backend/glasm/emit_glasm_warp.cpp              | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)

(limited to 'src/shader_recompiler/backend/glasm/emit_glasm_warp.cpp')

diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_warp.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_warp.cpp
index e69de29bb..37eb577cd 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_warp.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_warp.cpp
@@ -0,0 +1,118 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "shader_recompiler/backend/glasm/emit_context.h"
+#include "shader_recompiler/backend/glasm/emit_glasm_instructions.h"
+#include "shader_recompiler/frontend/ir/value.h"
+
+namespace Shader::Backend::GLASM {
+
+void EmitLaneId(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.S {}.x,{}.threadid;", inst, ctx.stage_name);
+}
+
+void EmitVoteAll(EmitContext& ctx, IR::Inst& inst, ScalarS32 pred) {
+    ctx.Add("TGALL.S {}.x,{};", inst, pred);
+}
+
+void EmitVoteAny(EmitContext& ctx, IR::Inst& inst, ScalarS32 pred) {
+    ctx.Add("TGANY.S {}.x,{};", inst, pred);
+}
+
+void EmitVoteEqual(EmitContext& ctx, IR::Inst& inst, ScalarS32 pred) {
+    ctx.Add("TGEQ.S {}.x,{};", inst, pred);
+}
+
+void EmitSubgroupBallot(EmitContext& ctx, IR::Inst& inst, ScalarS32 pred) {
+    ctx.Add("TGBALLOT {}.x,{};", inst, pred);
+}
+
+void EmitSubgroupEqMask(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.U {},{}.threadeqmask;", inst, ctx.stage_name);
+}
+
+void EmitSubgroupLtMask(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.U {},{}.threadltmask;", inst, ctx.stage_name);
+}
+
+void EmitSubgroupLeMask(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.U {},{}.threadlemask;", inst, ctx.stage_name);
+}
+
+void EmitSubgroupGtMask(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.U {},{}.threadgtmask;", inst, ctx.stage_name);
+}
+
+void EmitSubgroupGeMask(EmitContext& ctx, IR::Inst& inst) {
+    ctx.Add("MOV.U {},{}.threadgemask;", inst, ctx.stage_name);
+}
+
+static void Shuffle(EmitContext& ctx, IR::Inst& inst, ScalarU32 value, ScalarU32 index,
+                    const IR::Value& clamp, const IR::Value& segmentation_mask,
+                    std::string_view op) {
+    std::string mask;
+    if (clamp.IsImmediate() && segmentation_mask.IsImmediate()) {
+        mask = fmt::to_string(clamp.U32() | (segmentation_mask.U32() << 8));
+    } else {
+        mask = "RC";
+        ctx.Add("BFI.U RC.x,{{5,8,0,0}},{},{};",
+                ScalarU32{ctx.reg_alloc.Consume(segmentation_mask)},
+                ScalarU32{ctx.reg_alloc.Consume(clamp)});
+    }
+    const Register value_ret{ctx.reg_alloc.Define(inst)};
+    IR::Inst* const in_bounds{inst.GetAssociatedPseudoOperation(IR::Opcode::GetInBoundsFromOp)};
+    if (in_bounds) {
+        const Register bounds_ret{ctx.reg_alloc.Define(*in_bounds)};
+        ctx.Add("SHF{}.U {},{},{},{};"
+                "MOV.U {}.x,{}.y;",
+                op, bounds_ret, value, index, mask, value_ret, bounds_ret);
+        in_bounds->Invalidate();
+    } else {
+        ctx.Add("SHF{}.U {},{},{},{};"
+                "MOV.U {}.x,{}.y;",
+                op, value_ret, value, index, mask, value_ret, value_ret);
+    }
+}
+
+void EmitShuffleIndex(EmitContext& ctx, IR::Inst& inst, ScalarU32 value, ScalarU32 index,
+                      const IR::Value& clamp, const IR::Value& segmentation_mask) {
+    Shuffle(ctx, inst, value, index, clamp, segmentation_mask, "IDX");
+}
+
+void EmitShuffleUp(EmitContext& ctx, IR::Inst& inst, ScalarU32 value, ScalarU32 index,
+                   const IR::Value& clamp, const IR::Value& segmentation_mask) {
+    Shuffle(ctx, inst, value, index, clamp, segmentation_mask, "UP");
+}
+
+void EmitShuffleDown(EmitContext& ctx, IR::Inst& inst, ScalarU32 value, ScalarU32 index,
+                     const IR::Value& clamp, const IR::Value& segmentation_mask) {
+    Shuffle(ctx, inst, value, index, clamp, segmentation_mask, "DOWN");
+}
+
+void EmitShuffleButterfly(EmitContext& ctx, IR::Inst& inst, ScalarU32 value, ScalarU32 index,
+                          const IR::Value& clamp, const IR::Value& segmentation_mask) {
+    Shuffle(ctx, inst, value, index, clamp, segmentation_mask, "XOR");
+}
+
+void EmitFSwizzleAdd(EmitContext&, ScalarF32, ScalarF32, ScalarU32) {
+    throw NotImplementedException("GLASM instruction");
+}
+
+void EmitDPdxFine(EmitContext&, ScalarF32) {
+    throw NotImplementedException("GLASM instruction");
+}
+
+void EmitDPdyFine(EmitContext&, ScalarF32) {
+    throw NotImplementedException("GLASM instruction");
+}
+
+void EmitDPdxCoarse(EmitContext&, ScalarF32) {
+    throw NotImplementedException("GLASM instruction");
+}
+
+void EmitDPdyCoarse(EmitContext&, ScalarF32) {
+    throw NotImplementedException("GLASM instruction");
+}
+
+} // namespace Shader::Backend::GLASM
-- 
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