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v8/test/cctest/wasm/wasm-simd-utils.cc
Ng Zhi An c3f346b7ac [wasm-relaxed-simd][x64] Prototype relaxed min and max 
Relaxed f32x4 and f64x2 min and max.

These instructions only guarantee results when the inputs are non nans,
and when the inputs are not 0s of opposite signs.

Reuse existing float binop testing harnesses and add special checks for
such constants when relaxed operations are being tested.

Drive-by rename of x64 instruction codes to be Minps/Maxps/Minpd/Maxpd
since they map down exactly to a single instruction.

Bug: v8:12284
Change-Id: I1449dbfa87935a96d7d260db22667ab7b9e86601
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3218196
Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77484}
2021-10-21 00:58:24 +00:00

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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "test/cctest/wasm/wasm-simd-utils.h"
#include <cmath>
#include <type_traits>
#include "src/base/logging.h"
#include "src/base/memory.h"
#include "src/common/globals.h"
#include "src/wasm/compilation-environment.h"
#include "src/wasm/value-type.h"
#include "src/wasm/wasm-opcodes-inl.h"
#include "src/wasm/wasm-opcodes.h"
#include "test/cctest/compiler/c-signature.h"
#include "test/cctest/compiler/value-helper.h"
#include "test/cctest/wasm/wasm-run-utils.h"
#include "test/common/wasm/wasm-macro-gen.h"
namespace v8 {
namespace internal {
namespace wasm {
void RunI8x16UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int8UnOp expected_op) {
WasmRunner<int32_t, int32_t> r(execution_tier);
// Global to hold output.
int8_t* g = r.builder().AddGlobal<int8_t>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I8x16_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_INT8_INPUTS(x) {
r.Call(x);
int8_t expected = expected_op(x);
for (int i = 0; i < 16; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
template <typename T, typename OpType>
void RunI8x16BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
OpType expected_op) {
WasmRunner<int32_t, T, T> r(execution_tier);
// Global to hold output.
T* g = r.builder().template AddGlobal<T>(kWasmS128);
// Build fn to splat test values, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I8x16_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I8x16_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
for (T x : compiler::ValueHelper::GetVector<T>()) {
for (T y : compiler::ValueHelper::GetVector<T>()) {
r.Call(x, y);
T expected = expected_op(x, y);
for (int i = 0; i < 16; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
}
// Explicit instantiations of uses.
template void RunI8x16BinOpTest<int8_t>(TestExecutionTier, WasmOpcode,
Int8BinOp);
template void RunI8x16BinOpTest<uint8_t>(TestExecutionTier, WasmOpcode,
Uint8BinOp);
void RunI8x16ShiftOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int8ShiftOp expected_op) {
// Intentionally shift by 8, should be no-op.
for (int shift = 1; shift <= 8; shift++) {
WasmRunner<int32_t, int32_t> r(execution_tier);
int32_t* memory = r.builder().AddMemoryElems<int32_t>(1);
int8_t* g_imm = r.builder().AddGlobal<int8_t>(kWasmS128);
int8_t* g_mem = r.builder().AddGlobal<int8_t>(kWasmS128);
byte value = 0;
byte simd = r.AllocateLocal(kWasmS128);
// Shift using an immediate, and shift using a value loaded from memory.
BUILD(
r, WASM_LOCAL_SET(simd, WASM_SIMD_I8x16_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_SHIFT_OP(opcode, WASM_LOCAL_GET(simd),
WASM_I32V(shift))),
WASM_GLOBAL_SET(1, WASM_SIMD_SHIFT_OP(
opcode, WASM_LOCAL_GET(simd),
WASM_LOAD_MEM(MachineType::Int32(), WASM_ZERO))),
WASM_ONE);
r.builder().WriteMemory(&memory[0], shift);
FOR_INT8_INPUTS(x) {
r.Call(x);
int8_t expected = expected_op(x, shift);
for (int i = 0; i < 16; i++) {
CHECK_EQ(expected, LANE(g_imm, i));
CHECK_EQ(expected, LANE(g_mem, i));
}
}
}
}
void RunI8x16MixedRelationalOpTest(TestExecutionTier execution_tier,
WasmOpcode opcode, Int8BinOp expected_op) {
WasmRunner<int32_t, int32_t, int32_t> r(execution_tier);
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
byte temp3 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I8x16_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value2))),
WASM_LOCAL_SET(temp3, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_SIMD_I8x16_EXTRACT_LANE(0, WASM_LOCAL_GET(temp3)));
CHECK_EQ(expected_op(0xff, static_cast<uint8_t>(0x7fff)),
r.Call(0xff, 0x7fff));
CHECK_EQ(expected_op(0xfe, static_cast<uint8_t>(0x7fff)),
r.Call(0xfe, 0x7fff));
CHECK_EQ(expected_op(0xff, static_cast<uint8_t>(0x7ffe)),
r.Call(0xff, 0x7ffe));
}
void RunI16x8UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int16UnOp expected_op) {
WasmRunner<int32_t, int32_t> r(execution_tier);
// Global to hold output.
int16_t* g = r.builder().AddGlobal<int16_t>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_INT16_INPUTS(x) {
r.Call(x);
int16_t expected = expected_op(x);
for (int i = 0; i < 8; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
template <typename T, typename OpType>
void RunI16x8BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
OpType expected_op) {
WasmRunner<int32_t, T, T> r(execution_tier);
// Global to hold output.
T* g = r.builder().template AddGlobal<T>(kWasmS128);
// Build fn to splat test values, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
for (T x : compiler::ValueHelper::GetVector<T>()) {
for (T y : compiler::ValueHelper::GetVector<T>()) {
r.Call(x, y);
T expected = expected_op(x, y);
for (int i = 0; i < 8; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
}
// Explicit instantiations of uses.
template void RunI16x8BinOpTest<int16_t>(TestExecutionTier, WasmOpcode,
Int16BinOp);
template void RunI16x8BinOpTest<uint16_t>(TestExecutionTier, WasmOpcode,
Uint16BinOp);
void RunI16x8ShiftOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int16ShiftOp expected_op) {
// Intentionally shift by 16, should be no-op.
for (int shift = 1; shift <= 16; shift++) {
WasmRunner<int32_t, int32_t> r(execution_tier);
int32_t* memory = r.builder().AddMemoryElems<int32_t>(1);
int16_t* g_imm = r.builder().AddGlobal<int16_t>(kWasmS128);
int16_t* g_mem = r.builder().AddGlobal<int16_t>(kWasmS128);
byte value = 0;
byte simd = r.AllocateLocal(kWasmS128);
// Shift using an immediate, and shift using a value loaded from memory.
BUILD(
r, WASM_LOCAL_SET(simd, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_SHIFT_OP(opcode, WASM_LOCAL_GET(simd),
WASM_I32V(shift))),
WASM_GLOBAL_SET(1, WASM_SIMD_SHIFT_OP(
opcode, WASM_LOCAL_GET(simd),
WASM_LOAD_MEM(MachineType::Int32(), WASM_ZERO))),
WASM_ONE);
r.builder().WriteMemory(&memory[0], shift);
FOR_INT16_INPUTS(x) {
r.Call(x);
int16_t expected = expected_op(x, shift);
for (int i = 0; i < 8; i++) {
CHECK_EQ(expected, LANE(g_imm, i));
CHECK_EQ(expected, LANE(g_mem, i));
}
}
}
}
void RunI16x8MixedRelationalOpTest(TestExecutionTier execution_tier,
WasmOpcode opcode, Int16BinOp expected_op) {
WasmRunner<int32_t, int32_t, int32_t> r(execution_tier);
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
byte temp3 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I16x8_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I32x4_SPLAT(WASM_LOCAL_GET(value2))),
WASM_LOCAL_SET(temp3, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_SIMD_I16x8_EXTRACT_LANE(0, WASM_LOCAL_GET(temp3)));
CHECK_EQ(expected_op(0xffff, static_cast<uint16_t>(0x7fffffff)),
r.Call(0xffff, 0x7fffffff));
CHECK_EQ(expected_op(0xfeff, static_cast<uint16_t>(0x7fffffff)),
r.Call(0xfeff, 0x7fffffff));
CHECK_EQ(expected_op(0xffff, static_cast<uint16_t>(0x7ffffeff)),
r.Call(0xffff, 0x7ffffeff));
}
void RunI32x4UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int32UnOp expected_op) {
WasmRunner<int32_t, int32_t> r(execution_tier);
// Global to hold output.
int32_t* g = r.builder().AddGlobal<int32_t>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I32x4_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_INT32_INPUTS(x) {
r.Call(x);
int32_t expected = expected_op(x);
for (int i = 0; i < 4; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
void RunI32x4BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int32BinOp expected_op) {
WasmRunner<int32_t, int32_t, int32_t> r(execution_tier);
// Global to hold output.
int32_t* g = r.builder().AddGlobal<int32_t>(kWasmS128);
// Build fn to splat test values, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I32x4_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I32x4_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_INT32_INPUTS(x) {
FOR_INT32_INPUTS(y) {
r.Call(x, y);
int32_t expected = expected_op(x, y);
for (int i = 0; i < 4; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
}
void RunI32x4ShiftOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int32ShiftOp expected_op) {
// Intentionally shift by 32, should be no-op.
for (int shift = 1; shift <= 32; shift++) {
WasmRunner<int32_t, int32_t> r(execution_tier);
int32_t* memory = r.builder().AddMemoryElems<int32_t>(1);
int32_t* g_imm = r.builder().AddGlobal<int32_t>(kWasmS128);
int32_t* g_mem = r.builder().AddGlobal<int32_t>(kWasmS128);
byte value = 0;
byte simd = r.AllocateLocal(kWasmS128);
// Shift using an immediate, and shift using a value loaded from memory.
BUILD(
r, WASM_LOCAL_SET(simd, WASM_SIMD_I32x4_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_SHIFT_OP(opcode, WASM_LOCAL_GET(simd),
WASM_I32V(shift))),
WASM_GLOBAL_SET(1, WASM_SIMD_SHIFT_OP(
opcode, WASM_LOCAL_GET(simd),
WASM_LOAD_MEM(MachineType::Int32(), WASM_ZERO))),
WASM_ONE);
r.builder().WriteMemory(&memory[0], shift);
FOR_INT32_INPUTS(x) {
r.Call(x);
int32_t expected = expected_op(x, shift);
for (int i = 0; i < 4; i++) {
CHECK_EQ(expected, LANE(g_imm, i));
CHECK_EQ(expected, LANE(g_mem, i));
}
}
}
}
void RunI64x2UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int64UnOp expected_op) {
WasmRunner<int32_t, int64_t> r(execution_tier);
// Global to hold output.
int64_t* g = r.builder().AddGlobal<int64_t>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I64x2_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_INT64_INPUTS(x) {
r.Call(x);
int64_t expected = expected_op(x);
for (int i = 0; i < 2; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
void RunI64x2BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int64BinOp expected_op) {
WasmRunner<int32_t, int64_t, int64_t> r(execution_tier);
// Global to hold output.
int64_t* g = r.builder().AddGlobal<int64_t>(kWasmS128);
// Build fn to splat test values, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_I64x2_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_I64x2_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_INT64_INPUTS(x) {
FOR_INT64_INPUTS(y) {
r.Call(x, y);
int64_t expected = expected_op(x, y);
for (int i = 0; i < 2; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
}
void RunI64x2ShiftOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
Int64ShiftOp expected_op) {
// Intentionally shift by 64, should be no-op.
for (int shift = 1; shift <= 64; shift++) {
WasmRunner<int32_t, int64_t> r(execution_tier);
int32_t* memory = r.builder().AddMemoryElems<int32_t>(1);
int64_t* g_imm = r.builder().AddGlobal<int64_t>(kWasmS128);
int64_t* g_mem = r.builder().AddGlobal<int64_t>(kWasmS128);
byte value = 0;
byte simd = r.AllocateLocal(kWasmS128);
// Shift using an immediate, and shift using a value loaded from memory.
BUILD(
r, WASM_LOCAL_SET(simd, WASM_SIMD_I64x2_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_SHIFT_OP(opcode, WASM_LOCAL_GET(simd),
WASM_I32V(shift))),
WASM_GLOBAL_SET(1, WASM_SIMD_SHIFT_OP(
opcode, WASM_LOCAL_GET(simd),
WASM_LOAD_MEM(MachineType::Int32(), WASM_ZERO))),
WASM_ONE);
r.builder().WriteMemory(&memory[0], shift);
FOR_INT64_INPUTS(x) {
r.Call(x);
int64_t expected = expected_op(x, shift);
for (int i = 0; i < 2; i++) {
CHECK_EQ(expected, LANE(g_imm, i));
CHECK_EQ(expected, LANE(g_mem, i));
}
}
}
}
bool IsExtreme(float x) {
float abs_x = std::fabs(x);
const float kSmallFloatThreshold = 1.0e-32f;
const float kLargeFloatThreshold = 1.0e32f;
return abs_x != 0.0f && // 0 or -0 are fine.
(abs_x < kSmallFloatThreshold || abs_x > kLargeFloatThreshold);
}
bool IsCanonical(float actual) {
uint32_t actual_bits = bit_cast<uint32_t>(actual);
// Canonical NaN has quiet bit and no payload.
return (actual_bits & 0xFFC00000) == actual_bits;
}
void CheckFloatResult(float x, float y, float expected, float actual,
bool exact) {
if (std::isnan(expected)) {
CHECK(std::isnan(actual));
if (std::isnan(x) && IsSameNan(x, actual)) return;
if (std::isnan(y) && IsSameNan(y, actual)) return;
if (IsSameNan(expected, actual)) return;
if (IsCanonical(actual)) return;
// This is expected to assert; it's useful for debugging.
CHECK_EQ(bit_cast<uint32_t>(expected), bit_cast<uint32_t>(actual));
} else {
if (exact) {
CHECK_EQ(expected, actual);
// The sign of 0's must match.
CHECK_EQ(std::signbit(expected), std::signbit(actual));
return;
}
// Otherwise, perform an approximate equality test. First check for
// equality to handle +/-Infinity where approximate equality doesn't work.
if (expected == actual) return;
// 1% error allows all platforms to pass easily.
constexpr float kApproximationError = 0.01f;
float abs_error = std::abs(expected) * kApproximationError,
min = expected - abs_error, max = expected + abs_error;
CHECK_LE(min, actual);
CHECK_GE(max, actual);
}
}
void RunF32x4UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
FloatUnOp expected_op, bool exact) {
WasmRunner<int32_t, float> r(execution_tier);
// Global to hold output.
float* g = r.builder().AddGlobal<float>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F32x4_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_FLOAT32_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
// Extreme values have larger errors so skip them for approximation tests.
if (!exact && IsExtreme(x)) continue;
float expected = expected_op(x);
#if V8_OS_AIX
if (!MightReverseSign<FloatUnOp>(expected_op))
expected = FpOpWorkaround<float>(x, expected);
#endif
if (!PlatformCanRepresent(expected)) continue;
r.Call(x);
for (int i = 0; i < 4; i++) {
float actual = LANE(g, i);
CheckFloatResult(x, x, expected, actual, exact);
}
}
FOR_FLOAT32_NAN_INPUTS(f) {
float x = bit_cast<float>(nan_test_array[f]);
if (!PlatformCanRepresent(x)) continue;
// Extreme values have larger errors so skip them for approximation tests.
if (!exact && IsExtreme(x)) continue;
float expected = expected_op(x);
if (!PlatformCanRepresent(expected)) continue;
r.Call(x);
for (int i = 0; i < 4; i++) {
float actual = LANE(g, i);
CheckFloatResult(x, x, expected, actual, exact);
}
}
}
namespace {
// Relaxed-simd operations are deterministic only for some range of values.
// Exclude those from being tested. Currently this is only used for f32x4, f64x2
// relaxed min and max.
template <typename T>
typename std::enable_if<std::is_floating_point<T>::value, bool>::type
ShouldSkipTestingConstants(WasmOpcode opcode, T lhs, T rhs) {
bool has_nan = std::isnan(lhs) || std::isnan(rhs);
bool zeroes_of_opposite_signs =
(lhs == 0 && rhs == 0 && (std::signbit(lhs) != std::signbit(rhs)));
return WasmOpcodes::IsRelaxedSimdOpcode(opcode) &&
(has_nan || zeroes_of_opposite_signs);
}
} // namespace
void RunF32x4BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
FloatBinOp expected_op) {
WasmRunner<int32_t, float, float> r(execution_tier);
// Global to hold output.
float* g = r.builder().AddGlobal<float>(kWasmS128);
// Build fn to splat test values, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F32x4_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_F32x4_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_FLOAT32_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT32_INPUTS(y) {
if (!PlatformCanRepresent(y)) continue;
if (ShouldSkipTestingConstants(opcode, x, y)) continue;
float expected = expected_op(x, y);
if (!PlatformCanRepresent(expected)) continue;
r.Call(x, y);
for (int i = 0; i < 4; i++) {
float actual = g[i];
CheckFloatResult(x, y, expected, actual, true /* exact */);
}
}
}
FOR_FLOAT32_NAN_INPUTS(f) {
float x = bit_cast<float>(nan_test_array[f]);
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT32_NAN_INPUTS(j) {
float y = bit_cast<float>(nan_test_array[j]);
if (!PlatformCanRepresent(y)) continue;
if (ShouldSkipTestingConstants(opcode, x, y)) continue;
float expected = expected_op(x, y);
if (!PlatformCanRepresent(expected)) continue;
r.Call(x, y);
for (int i = 0; i < 4; i++) {
float actual = LANE(g, i);
CheckFloatResult(x, y, expected, actual, true /* exact */);
}
}
}
}
void RunF32x4CompareOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
FloatCompareOp expected_op) {
WasmRunner<int32_t, float, float> r(execution_tier);
// Set up global to hold mask output.
int32_t* g = r.builder().AddGlobal<int32_t>(kWasmS128);
// Build fn to splat test values, perform compare op, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F32x4_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_F32x4_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_FLOAT32_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT32_INPUTS(y) {
if (!PlatformCanRepresent(y)) continue;
float diff = x - y; // Model comparison as subtraction.
if (!PlatformCanRepresent(diff)) continue;
r.Call(x, y);
int32_t expected = expected_op(x, y);
for (int i = 0; i < 4; i++) {
CHECK_EQ(expected, LANE(g, i));
}
}
}
}
bool IsExtreme(double x) {
double abs_x = std::fabs(x);
const double kSmallFloatThreshold = 1.0e-298;
const double kLargeFloatThreshold = 1.0e298;
return abs_x != 0.0f && // 0 or -0 are fine.
(abs_x < kSmallFloatThreshold || abs_x > kLargeFloatThreshold);
}
bool IsCanonical(double actual) {
uint64_t actual_bits = bit_cast<uint64_t>(actual);
// Canonical NaN has quiet bit and no payload.
return (actual_bits & 0xFFF8000000000000) == actual_bits;
}
void CheckDoubleResult(double x, double y, double expected, double actual,
bool exact) {
if (std::isnan(expected)) {
CHECK(std::isnan(actual));
if (std::isnan(x) && IsSameNan(x, actual)) return;
if (std::isnan(y) && IsSameNan(y, actual)) return;
if (IsSameNan(expected, actual)) return;
if (IsCanonical(actual)) return;
// This is expected to assert; it's useful for debugging.
CHECK_EQ(bit_cast<uint64_t>(expected), bit_cast<uint64_t>(actual));
} else {
if (exact) {
CHECK_EQ(expected, actual);
// The sign of 0's must match.
CHECK_EQ(std::signbit(expected), std::signbit(actual));
return;
}
// Otherwise, perform an approximate equality test. First check for
// equality to handle +/-Infinity where approximate equality doesn't work.
if (expected == actual) return;
// 1% error allows all platforms to pass easily.
constexpr double kApproximationError = 0.01f;
double abs_error = std::abs(expected) * kApproximationError,
min = expected - abs_error, max = expected + abs_error;
CHECK_LE(min, actual);
CHECK_GE(max, actual);
}
}
void RunF64x2UnOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
DoubleUnOp expected_op, bool exact) {
WasmRunner<int32_t, double> r(execution_tier);
// Global to hold output.
double* g = r.builder().AddGlobal<double>(kWasmS128);
// Build fn to splat test value, perform unop, and write the result.
byte value = 0;
byte temp1 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F64x2_SPLAT(WASM_LOCAL_GET(value))),
WASM_GLOBAL_SET(0, WASM_SIMD_UNOP(opcode, WASM_LOCAL_GET(temp1))),
WASM_ONE);
FOR_FLOAT64_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
// Extreme values have larger errors so skip them for approximation tests.
if (!exact && IsExtreme(x)) continue;
double expected = expected_op(x);
#if V8_OS_AIX
if (!MightReverseSign<DoubleUnOp>(expected_op))
expected = FpOpWorkaround<double>(x, expected);
#endif
if (!PlatformCanRepresent(expected)) continue;
r.Call(x);
for (int i = 0; i < 2; i++) {
double actual = LANE(g, i);
CheckDoubleResult(x, x, expected, actual, exact);
}
}
FOR_FLOAT64_NAN_INPUTS(d) {
double x = bit_cast<double>(double_nan_test_array[d]);
if (!PlatformCanRepresent(x)) continue;
// Extreme values have larger errors so skip them for approximation tests.
if (!exact && IsExtreme(x)) continue;
double expected = expected_op(x);
if (!PlatformCanRepresent(expected)) continue;
r.Call(x);
for (int i = 0; i < 2; i++) {
double actual = LANE(g, i);
CheckDoubleResult(x, x, expected, actual, exact);
}
}
}
void RunF64x2BinOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
DoubleBinOp expected_op) {
WasmRunner<int32_t, double, double> r(execution_tier);
// Global to hold output.
double* g = r.builder().AddGlobal<double>(kWasmS128);
// Build fn to splat test value, perform binop, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F64x2_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp2, WASM_SIMD_F64x2_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_FLOAT64_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT64_INPUTS(y) {
if (!PlatformCanRepresent(x)) continue;
if (ShouldSkipTestingConstants(opcode, x, y)) continue;
double expected = expected_op(x, y);
if (!PlatformCanRepresent(expected)) continue;
r.Call(x, y);
for (int i = 0; i < 2; i++) {
double actual = LANE(g, i);
CheckDoubleResult(x, y, expected, actual, true /* exact */);
}
}
}
FOR_FLOAT64_NAN_INPUTS(d) {
double x = bit_cast<double>(double_nan_test_array[d]);
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT64_NAN_INPUTS(j) {
double y = bit_cast<double>(double_nan_test_array[j]);
double expected = expected_op(x, y);
if (!PlatformCanRepresent(expected)) continue;
if (ShouldSkipTestingConstants(opcode, x, y)) continue;
r.Call(x, y);
for (int i = 0; i < 2; i++) {
double actual = LANE(g, i);
CheckDoubleResult(x, y, expected, actual, true /* exact */);
}
}
}
}
void RunF64x2CompareOpTest(TestExecutionTier execution_tier, WasmOpcode opcode,
DoubleCompareOp expected_op) {
WasmRunner<int32_t, double, double> r(execution_tier);
// Set up global to hold mask output.
int64_t* g = r.builder().AddGlobal<int64_t>(kWasmS128);
// Build fn to splat test values, perform compare op, and write the result.
byte value1 = 0, value2 = 1;
byte temp1 = r.AllocateLocal(kWasmS128);
byte temp2 = r.AllocateLocal(kWasmS128);
// Make the lanes of each temp compare differently:
// temp1 = y, x and temp2 = y, y.
BUILD(r, WASM_LOCAL_SET(temp1, WASM_SIMD_F64x2_SPLAT(WASM_LOCAL_GET(value1))),
WASM_LOCAL_SET(temp1,
WASM_SIMD_F64x2_REPLACE_LANE(1, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(value2))),
WASM_LOCAL_SET(temp2, WASM_SIMD_F64x2_SPLAT(WASM_LOCAL_GET(value2))),
WASM_GLOBAL_SET(0, WASM_SIMD_BINOP(opcode, WASM_LOCAL_GET(temp1),
WASM_LOCAL_GET(temp2))),
WASM_ONE);
FOR_FLOAT64_INPUTS(x) {
if (!PlatformCanRepresent(x)) continue;
FOR_FLOAT64_INPUTS(y) {
if (!PlatformCanRepresent(y)) continue;
double diff = x - y; // Model comparison as subtraction.
if (!PlatformCanRepresent(diff)) continue;
r.Call(x, y);
int64_t expected0 = expected_op(x, y);
int64_t expected1 = expected_op(y, y);
CHECK_EQ(expected0, LANE(g, 0));
CHECK_EQ(expected1, LANE(g, 1));
}
}
}
} // namespace wasm
} // namespace internal
} // namespace v8
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