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| 1 // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/v8.h" |
| 6 |
| 7 #include "src/arguments.h" |
| 8 #include "src/base/macros.h" |
| 9 #include "src/conversions.h" |
| 10 #include "src/runtime/runtime-utils.h" |
| 11 |
| 12 // Implement Single Instruction Multiple Data (SIMD) operations as defined in |
| 13 // the SIMD.js draft spec: |
| 14 // http://littledan.github.io/simd.html |
| 15 |
| 16 #define NumberToFloat32x4Component NumberToFloat |
| 17 |
| 18 #define CONVERT_SIMD_LANE_ARG_CHECKED(name, index, lanes) \ |
| 19 RUNTIME_ASSERT(args[index]->IsSmi()); \ |
| 20 int name = args.smi_at(index); \ |
| 21 RUNTIME_ASSERT(name >= 0 && name < lanes); |
| 22 |
| 23 #define SIMD_CHECK_FUNCTION(type) \ |
| 24 RUNTIME_FUNCTION(Runtime_##type##Check) { \ |
| 25 HandleScope scope(isolate); \ |
| 26 CONVERT_ARG_HANDLE_CHECKED(type, a, 0); \ |
| 27 return *a; \ |
| 28 } |
| 29 |
| 30 #define SIMD_EXTRACT_LANE_FUNCTION(type, lanes) \ |
| 31 RUNTIME_FUNCTION(Runtime_##type##ExtractLane) { \ |
| 32 HandleScope scope(isolate); \ |
| 33 DCHECK(args.length() == 2); \ |
| 34 CONVERT_ARG_HANDLE_CHECKED(type, a, 0); \ |
| 35 CONVERT_SIMD_LANE_ARG_CHECKED(lane, 1, lanes); \ |
| 36 return *isolate->factory()->NewNumber(a->get_lane(lane)); \ |
| 37 } |
| 38 |
| 39 #define SIMD4_CREATE_FUNCTION(type) \ |
| 40 RUNTIME_FUNCTION(Runtime_Create##type) { \ |
| 41 HandleScope scope(isolate); \ |
| 42 DCHECK(args.length() == 4); \ |
| 43 CONVERT_NUMBER_ARG_HANDLE_CHECKED(w, 0); \ |
| 44 CONVERT_NUMBER_ARG_HANDLE_CHECKED(x, 1); \ |
| 45 CONVERT_NUMBER_ARG_HANDLE_CHECKED(y, 2); \ |
| 46 CONVERT_NUMBER_ARG_HANDLE_CHECKED(z, 3); \ |
| 47 return *isolate->factory()->NewFloat32x4( \ |
| 48 NumberTo##type##Component(*w), NumberTo##type##Component(*x), \ |
| 49 NumberTo##type##Component(*y), NumberTo##type##Component(*z)); \ |
| 50 } |
| 51 |
| 52 #define SIMD_CREATE_WRAPPER_FUNCTION(type) \ |
| 53 RUNTIME_FUNCTION(Runtime_New##type##Wrapper) { \ |
| 54 HandleScope scope(isolate); \ |
| 55 DCHECK(args.length() == 1); \ |
| 56 CONVERT_ARG_HANDLE_CHECKED(type, value, 0); \ |
| 57 return *Object::ToObject(isolate, value).ToHandleChecked(); \ |
| 58 } |
| 59 |
| 60 #define SIMD4_EXTRACT_LANE_FUNCTION(type) SIMD_EXTRACT_LANE_FUNCTION(type, 4) |
| 61 |
| 62 |
| 63 #define SIMD4_FUNCTIONS(type) \ |
| 64 SIMD4_CREATE_FUNCTION(type) \ |
| 65 SIMD_CREATE_WRAPPER_FUNCTION(type) \ |
| 66 SIMD_CHECK_FUNCTION(type) \ |
| 67 SIMD4_EXTRACT_LANE_FUNCTION(type) |
| 68 |
| 69 |
| 70 namespace v8 { |
| 71 namespace internal { |
| 72 |
| 73 namespace { |
| 74 |
| 75 // Convert from Number object to float. |
| 76 inline float NumberToFloat(Object* number) { |
| 77 // Don't bother checking for Smi, we might still overflow a float. |
| 78 return DoubleToFloat32(number->Number()); |
| 79 } |
| 80 |
| 81 } // namespace |
| 82 |
| 83 SIMD4_FUNCTIONS(Float32x4) |
| 84 } |
| 85 } // namespace v8::internal |
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