[ET-VK][Ops] enabling double support for quantization and dequantization ops

Pull Request resolved: #11553

# Context
Since we enabled the possibility for double support in an earlier diff, this enables double support for quantization and dequantization. Since there are limitations to how 64bit can be supported, the expectation is that IO is to be downgraded to 32bit.

# Changes
We create additional test cases for double support and make sure to pass in the double if its permitted (it's only allowed in buffers), and we also make sure to include double variants in the corresponding YAML files for quantization and dequantization.
ghstack-source-id: 290819507
@exported-using-ghexport

Differential Revision: [D76289197](https://our.internmc.facebook.com/intern/diff/D76289197/)

Author: morelos

backends/vulkan/runtime/graph/ops/glsl/dequantize_buffer.yaml

@@ -11,6 +11,7 @@ dequantize_buffer:
     OUT_DTYPE:
       - VALUE: half
       - VALUE: float
+      - VALUE: double
   shader_variants:
     - NAME: dequantize_per_tensor_buffer
       MODE: per_tensor

backends/vulkan/runtime/graph/ops/glsl/dequantize_texture.glsl

@@ -70,7 +70,10 @@ void dequantize_per_tensor() {
   [[unroll]] for (int i = 0; i < 4; ++i) {
     IN_T qvalue = IN_T(intex[i]);
     OUT_T value = dequantize_val(qvalue, scale, zero_point);
-    outtex[i] = value;
+    $if OUT_DTYPE == "double":
+      outtex[i] = float(value);
+    $else:
+      outtex[i] = value;
   }
   write_texel(t_out, pos, outtex);
 }
@@ -108,7 +111,10 @@ void dequantize_per_token() {
   [[unroll]] for (int i = 0; i < 4; ++i) {
     IN_T qvalue = IN_T(intex[i]);
     OUT_T value = dequantize_val(qvalue, scale_val, zero_point_val);
-    outtex[i] = value;
+    $if OUT_DTYPE == "double":
+      outtex[i] = float(value);
+    $else:
+      outtex[i] = value;
   }
 
   write_texel(t_out, pos, outtex);

backends/vulkan/runtime/graph/ops/glsl/dequantize_texture.yaml

@@ -11,6 +11,7 @@ dequantize_texture:
     OUT_DTYPE:
       - VALUE: half
       - VALUE: float
+      - VALUE: double
   shader_variants:
     - NAME: dequantize_per_tensor_texture3d
       MODE: per_tensor

backends/vulkan/runtime/graph/ops/glsl/quantize_buffer.yaml

@@ -7,6 +7,7 @@ quantize_buffer:
     IN_DTYPE:
       - VALUE: half
       - VALUE: float
+      - VALUE: double
     OUT_DTYPE:
       - VALUE: uint8
       - VALUE: int8

backends/vulkan/runtime/graph/ops/glsl/quantize_texture.yaml

@@ -7,6 +7,7 @@ quantize_texture:
     IN_DTYPE:
       - VALUE: half
       - VALUE: float
+      - VALUE: double
     OUT_DTYPE:
       - VALUE: uint8
       - VALUE: int8

backends/vulkan/runtime/graph/ops/impl/Quantize.cpp

@@ -196,6 +196,7 @@ void quantize_per_tensor_impl(
 
   // Verify input is a floating point type
   VK_CHECK_COND(
+      graph.dtype_of(input) == vkapi::kDouble ||
       graph.dtype_of(input) == vkapi::kFloat ||
       graph.dtype_of(input) == vkapi::kHalf);
 
@@ -222,6 +223,7 @@ void quantize_per_token_impl(
 
   // Verify input is a floating point type
   VK_CHECK_COND(
+      graph.dtype_of(input) == vkapi::kDouble ||
       graph.dtype_of(input) == vkapi::kFloat ||
       graph.dtype_of(input) == vkapi::kHalf);
 

backends/vulkan/test/op_tests/dequantize_test.cpp

@@ -366,6 +366,12 @@ void test_vulkan_dequantize_per_tensor(
       vkcompute::utils::kBuffer,
       vkcompute::utils::kBuffer);
 
+  // Telling the system to expect a float instead of a double
+  // since the shader can only return 32bit anyways
+  if (out_dtype == at::kDouble) {
+    out_dtype = at::kFloat;
+  }
+
   // Test with texture storage
   test_vulkan_dequantize_per_tensor_impl(
       input_sizes,
@@ -400,6 +406,12 @@ void test_vulkan_dequantize_per_token(
       vkcompute::utils::kBuffer,
       vkcompute::utils::kBuffer);
 
+  // Telling the system to expect a float instead of a double
+  // since the shader can only return 32bit anyways
+  if (out_dtype == at::kDouble) {
+    out_dtype = at::kFloat;
+  }
+
   // Test with texture storage
   test_vulkan_dequantize_per_token_impl(
       input_sizes,
@@ -793,6 +805,19 @@ TEST(
       at::kHalf); // output dtype
 }
 
+TEST(
+    VulkanDequantizePerTensorTest,
+    test_vulkan_dequantize_per_tensor_int32_to_double) {
+  test_vulkan_dequantize_per_tensor(
+      {2, 4, 3}, // input sizes
+      0.0001, // scale
+      100, // zero_point
+      -2147483648, // quant_min
+      2147483647, // quant_max
+      at::kInt, // input dtype
+      at::kDouble); // output dtype
+}
+
 void test_reference_dequantize_per_token(
     const std::vector<int>& input_sizes,
     const std::vector<float>& scales,
@@ -1281,3 +1306,19 @@ TEST(
       at::kInt, // input dtype
       at::kHalf); // output dtype
 }
+
+TEST(
+    VulkanDequantizePerTokenTest,
+    test_vulkan_dequantize_per_token_int32_to_double) {
+  std::vector<float> scales = {0.0001, 0.0002, 0.0003, 0.0};
+  std::vector<int> zero_points = {100, -100, 50, -50};
+
+  test_vulkan_dequantize_per_token(
+      {2, 2, 8}, // input sizes (2*2=4 tokens)
+      scales,
+      zero_points,
+      -2147483648, // quant_min
+      2147483647, // quant_max
+      at::kInt, // input dtype
+      at::kDouble); // output dtype
+}

backends/vulkan/test/op_tests/quantize_test.cpp

@@ -315,6 +315,12 @@ void test_vulkan_quantize_per_tensor(
       vkcompute::utils::kBuffer,
       vkcompute::utils::kBuffer);
 
+  // If the in_dtype is a double, convert to float for texture implementation
+  // since they don't support 64bit as inputs
+  if (in_dtype == at::kDouble) {
+    in_dtype = at::kFloat;
+  }
+
   // Test with texture storage
   test_vulkan_quantize_per_tensor_impl(
       input_sizes,
@@ -349,6 +355,12 @@ void test_vulkan_quantize_per_token(
       vkcompute::utils::kBuffer,
       vkcompute::utils::kBuffer);
 
+  // If the in_dtype is a double, convert to float for texture implementation
+  // since they don't support 64bit as inputs
+  if (in_dtype == at::kDouble) {
+    in_dtype = at::kFloat;
+  }
+
   // Test with texture storage
   test_vulkan_quantize_per_token_impl(
       input_sizes,
@@ -655,6 +667,19 @@ TEST(
       at::kChar); // output dtype
 }
 
+TEST(
+    VulkanQuantizePerTensorTest,
+    test_vulkan_quantize_per_tensor_double_to_int8) {
+  test_vulkan_quantize_per_tensor(
+      {2, 3}, // input sizes
+      0.01, // scale
+      1, // zero_point
+      -128, // quant_min
+      127, // quant_max
+      at::kDouble, // input dtype
+      at::kChar); // output dtype
+}
+
 void test_reference_quantize_per_token(
     const std::vector<int>& input_sizes,
     const std::vector<float>& pre_scales,
@@ -1066,3 +1091,19 @@ TEST(VulkanQuantizePerTensorTest, test_vulkan_quantize_per_token_half_to_int8) {
       at::kHalf, // input dtype
       at::kChar); // output dtype
 }
+
+TEST(
+    VulkanQuantizePerTensorTest,
+    test_vulkan_quantize_per_token_double_to_int8) {
+  std::vector<float> scales = {0.1, 0.2};
+  std::vector<int> zero_points = {0, 5};
+
+  test_vulkan_quantize_per_token(
+      {2, 2}, // input sizes (2*2=4 tokens)
+      scales,
+      zero_points,
+      -128, // quant_min
+      127, // quant_max
+      at::kDouble, // input dtype
+      at::kChar); // output dtype
+}