From 51475e21ba5e9a17730a2b5a868dc73d53db9bc1 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sat, 27 Mar 2021 19:47:00 -0400
Subject: shader: Implement VMAD, VMNMX, VSETP

---
 .../maxwell/translate/impl/video_set_predicate.cpp | 92 ++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 src/shader_recompiler/frontend/maxwell/translate/impl/video_set_predicate.cpp

(limited to 'src/shader_recompiler/frontend/maxwell/translate/impl/video_set_predicate.cpp')

diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/video_set_predicate.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/video_set_predicate.cpp
new file mode 100644
index 000000000..af13b3fcc
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/video_set_predicate.cpp
@@ -0,0 +1,92 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/common_types.h"
+#include "shader_recompiler/exception.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/video_helper.h"
+
+namespace Shader::Maxwell {
+namespace {
+enum class VsetpCompareOp : u64 {
+    False = 0,
+    LessThan,
+    Equal,
+    LessThanEqual,
+    GreaterThan = 16,
+    NotEqual,
+    GreaterThanEqual,
+    True,
+};
+
+CompareOp VsetpToShaderCompareOp(VsetpCompareOp op) {
+    switch (op) {
+    case VsetpCompareOp::False:
+        return CompareOp::False;
+    case VsetpCompareOp::LessThan:
+        return CompareOp::LessThan;
+    case VsetpCompareOp::Equal:
+        return CompareOp::Equal;
+    case VsetpCompareOp::LessThanEqual:
+        return CompareOp::LessThanEqual;
+    case VsetpCompareOp::GreaterThan:
+        return CompareOp::GreaterThan;
+    case VsetpCompareOp::NotEqual:
+        return CompareOp::NotEqual;
+    case VsetpCompareOp::GreaterThanEqual:
+        return CompareOp::GreaterThanEqual;
+    case VsetpCompareOp::True:
+        return CompareOp::True;
+    default:
+        throw NotImplementedException("Invalid compare op {}", op);
+    }
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::VSETP(u64 insn) {
+    union {
+        u64 raw;
+        BitField<0, 3, IR::Pred> dest_pred_b;
+        BitField<3, 3, IR::Pred> dest_pred_a;
+        BitField<20, 16, u64> src_b_imm;
+        BitField<28, 2, u64> src_b_selector;
+        BitField<29, 2, VideoWidth> src_b_width;
+        BitField<36, 2, u64> src_a_selector;
+        BitField<37, 2, VideoWidth> src_a_width;
+        BitField<39, 3, IR::Pred> bop_pred;
+        BitField<42, 1, u64> neg_bop_pred;
+        BitField<43, 5, VsetpCompareOp> compare_op;
+        BitField<45, 2, BooleanOp> bop;
+        BitField<48, 1, u64> src_a_sign;
+        BitField<49, 1, u64> src_b_sign;
+        BitField<50, 1, u64> is_src_b_reg;
+    } const vsetp{insn};
+
+    const bool is_b_imm{vsetp.is_src_b_reg == 0};
+    const IR::U32 src_a{GetReg8(insn)};
+    const IR::U32 src_b{is_b_imm ? ir.Imm32(static_cast<u32>(vsetp.src_b_imm)) : GetReg20(insn)};
+
+    const u32 a_selector{static_cast<u32>(vsetp.src_a_selector)};
+    const u32 b_selector{is_b_imm ? 0U : static_cast<u32>(vsetp.src_b_selector)};
+    const VideoWidth a_width{vsetp.src_a_width};
+    const VideoWidth b_width{GetVideoSourceWidth(vsetp.src_b_width, is_b_imm)};
+
+    const bool src_a_signed{vsetp.src_a_sign != 0};
+    const bool src_b_signed{vsetp.src_b_sign != 0};
+    const IR::U32 op_a{ExtractVideoOperandValue(ir, src_a, a_width, a_selector, src_a_signed)};
+    const IR::U32 op_b{ExtractVideoOperandValue(ir, src_b, b_width, a_selector, src_b_signed)};
+
+    // Compare operation's sign is only dependent on operand b's sign
+    const bool compare_signed{src_b_signed};
+    const CompareOp compare_op{VsetpToShaderCompareOp(vsetp.compare_op)};
+    const IR::U1 comparison{IntegerCompare(ir, op_a, op_b, compare_op, compare_signed)};
+    const IR::U1 bop_pred{ir.GetPred(vsetp.bop_pred, vsetp.neg_bop_pred != 0)};
+    const IR::U1 result_a{PredicateCombine(ir, comparison, bop_pred, vsetp.bop)};
+    const IR::U1 result_b{PredicateCombine(ir, ir.LogicalNot(comparison), bop_pred, vsetp.bop)};
+    ir.SetPred(vsetp.dest_pred_a, result_a);
+    ir.SetPred(vsetp.dest_pred_b, result_b);
+}
+
+} // namespace Shader::Maxwell
-- 
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