From e02db3904bae35e1fd78cac9b5422be6a7fea57f Mon Sep 17 00:00:00 2001
From: Tony Wasserka <NeoBrainX@gmail.com>
Date: Sat, 3 Jan 2015 13:29:44 +0100
Subject: [PATCH] Pica/VertexShader: Implement the MAD instruction.
---
externals/nihstro | 2 +-
src/video_core/vertex_shader.cpp | 69 ++++++++++++++++++++++++++++++++
2 files changed, 70 insertions(+), 1 deletion(-)
diff --git a/externals/nihstro b/externals/nihstro
index fc71f8684..0a8b4d221 160000
--- a/externals/nihstro
+++ b/externals/nihstro
@@ -1 +1 @@
-Subproject commit fc71f8684d26ccf277ad68809c8bd7273141fe89
+Subproject commit 0a8b4d221425f13e24a3cef9b02edc3221bab211
diff --git a/src/video_core/vertex_shader.cpp b/src/video_core/vertex_shader.cpp
index ff825e2e1..fd82d3985 100644
--- a/src/video_core/vertex_shader.cpp
+++ b/src/video_core/vertex_shader.cpp
@@ -348,6 +348,75 @@ static void ProcessShaderCode(VertexShaderState& state) {
break;
}
+
+ case Instruction::OpCodeType::MultiplyAdd:
+ {
+ if (instr.opcode.EffectiveOpCode() == Instruction::OpCode::MAD) {
+ const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.mad.operand_desc_id];
+
+ const float24* src1_ = LookupSourceRegister(instr.mad.src1);
+ const float24* src2_ = LookupSourceRegister(instr.mad.src2);
+ const float24* src3_ = LookupSourceRegister(instr.mad.src3);
+
+ const bool negate_src1 = ((bool)swizzle.negate_src1 != false);
+ const bool negate_src2 = ((bool)swizzle.negate_src2 != false);
+ const bool negate_src3 = ((bool)swizzle.negate_src3 != false);
+
+ float24 src1[4] = {
+ src1_[(int)swizzle.GetSelectorSrc1(0)],
+ src1_[(int)swizzle.GetSelectorSrc1(1)],
+ src1_[(int)swizzle.GetSelectorSrc1(2)],
+ src1_[(int)swizzle.GetSelectorSrc1(3)],
+ };
+ if (negate_src1) {
+ src1[0] = src1[0] * float24::FromFloat32(-1);
+ src1[1] = src1[1] * float24::FromFloat32(-1);
+ src1[2] = src1[2] * float24::FromFloat32(-1);
+ src1[3] = src1[3] * float24::FromFloat32(-1);
+ }
+ float24 src2[4] = {
+ src2_[(int)swizzle.GetSelectorSrc2(0)],
+ src2_[(int)swizzle.GetSelectorSrc2(1)],
+ src2_[(int)swizzle.GetSelectorSrc2(2)],
+ src2_[(int)swizzle.GetSelectorSrc2(3)],
+ };
+ if (negate_src2) {
+ src2[0] = src2[0] * float24::FromFloat32(-1);
+ src2[1] = src2[1] * float24::FromFloat32(-1);
+ src2[2] = src2[2] * float24::FromFloat32(-1);
+ src2[3] = src2[3] * float24::FromFloat32(-1);
+ }
+ float24 src3[4] = {
+ src3_[(int)swizzle.GetSelectorSrc3(0)],
+ src3_[(int)swizzle.GetSelectorSrc3(1)],
+ src3_[(int)swizzle.GetSelectorSrc3(2)],
+ src3_[(int)swizzle.GetSelectorSrc3(3)],
+ };
+ if (negate_src3) {
+ src3[0] = src3[0] * float24::FromFloat32(-1);
+ src3[1] = src3[1] * float24::FromFloat32(-1);
+ src3[2] = src3[2] * float24::FromFloat32(-1);
+ src3[3] = src3[3] * float24::FromFloat32(-1);
+ }
+
+ float24* dest = (instr.mad.dest < 0x08) ? state.output_register_table[4*instr.mad.dest.GetIndex()]
+ : (instr.mad.dest < 0x10) ? dummy_vec4_float24
+ : (instr.mad.dest < 0x20) ? &state.temporary_registers[instr.mad.dest.GetIndex()][0]
+ : dummy_vec4_float24;
+
+ for (int i = 0; i < 4; ++i) {
+ if (!swizzle.DestComponentEnabled(i))
+ continue;
+
+ dest[i] = src1[i] * src2[i] + src3[i];
+ }
+ } else {
+ LOG_ERROR(HW_GPU, "Unhandled multiply-add instruction: 0x%02x (%s): 0x%08x",
+ (int)instr.opcode.Value(), instr.opcode.GetInfo().name, instr.hex);
+ }
+ break;
+ }
+
default:
// Handle each instruction on its own
switch (instr.opcode) {