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-rw-r--r--js/src/jit-test/tests/wasm/simd/ion-analysis.js902
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diff --git a/js/src/jit-test/tests/wasm/simd/ion-analysis.js b/js/src/jit-test/tests/wasm/simd/ion-analysis.js
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+++ b/js/src/jit-test/tests/wasm/simd/ion-analysis.js
@@ -0,0 +1,902 @@
+// |jit-test| skip-if: !wasmSimdEnabled() || wasmCompileMode() != "ion" || !this.wasmSimdAnalysis
+
+// White-box tests for SIMD optimizations. These are sensitive to internal
+// details of the front-end and lowering logic, which is partly platform-dependent.
+//
+// In DEBUG builds, the testing function wasmSimdAnalysis() returns a string
+// describing the last decision made by the SIMD lowering code: to perform an
+// optimized lowering or the default byte shuffle+blend for i8x16.shuffle; to
+// shift by a constant or a variable for the various shifts; and so on.
+//
+// We test that the expected transformation applies, and that the machine code
+// generates the expected result.
+
+var isArm64 = getBuildConfiguration().arm64;
+
+// 32-bit permutation that is not a rotation.
+let perm32x4_pattern = [4, 5, 6, 7, 12, 13, 14, 15, 8, 9, 10, 11, 0, 1, 2, 3];
+
+// Operands the same, dword permutation
+{
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm32x4_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm32x4_pattern);
+}
+
+// Right operand ignored, dword permutation
+{
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${perm32x4_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ set(mem, 32, iota(16).map(x => x+16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm32x4_pattern);
+}
+
+// Left operand ignored, dword permutation
+{
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${perm32x4_pattern.map(x => x+16).join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16).map(x => x+16));
+ set(mem, 32, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm32x4_pattern);
+}
+
+// Operands the same, word permutation on both sides of the qword divide, with a qword swap
+{
+ let perm16x8_pattern = [12, 13, 14, 15, 10, 11, 8, 9,
+ 6, 7, 4, 5, 2, 3, 0, 1];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm16x8_pattern);
+}
+
+// Operands the same, word permutation on both sides of the qword divide, no qword swap
+{
+ let perm16x8_pattern = [ 6, 7, 4, 5, 2, 3, 0, 1,
+ 12, 13, 14, 15, 10, 11, 8, 9];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm16x8_pattern);
+}
+
+// Operands the same, word permutation on low side of the qword divide, no qword swap
+{
+ let perm16x8_pattern = [ 6, 7, 4, 5, 2, 3, 0, 1,
+ 8, 9, 10, 11, 12, 13, 14, 15];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm16x8_pattern);
+}
+
+// Operands the same, word permutation on high side of the qword divide, no qword swap
+{
+ let perm16x8_pattern = [ 0, 1, 2, 3, 4, 5, 6, 7,
+ 12, 13, 14, 15, 10, 11, 8, 9];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm16x8_pattern);
+}
+
+// Same operands, byte rotate
+{
+ // 8-bit permutation that is a rotation
+ let rot8x16_pattern = [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${rot8x16_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> rotate-right 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rot8x16_pattern);
+}
+
+// Operands the same, random jumble => byte permutation
+{
+ // 8-bit permutation that is not a rotation
+ let perm8x16_pattern = [5, 7, 6, 8, 9, 10, 11, 4, 13, 14, 15, 0, 1, 2, 3, 12];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${perm8x16_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), perm8x16_pattern);
+}
+
+// Operands differ, both accessed, rhs is constant zero, left-shift pattern
+{
+ // 8-bit shift with zeroes shifted in at the right end
+ let shift8x16_pattern = [16, 16, 16, 16, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${shift8x16_pattern.join(' ')} (local.get 0) (v128.const i32x4 0 0 0 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shift-left 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), shift8x16_pattern.map(x => x >= 16 ? 0 : x));
+}
+
+// The same as above but the constant is lhs.
+{
+ // 8-bit shift with zeroes shifted in at the right end
+ let shift8x16_pattern = [16, 16, 16, 16, 16, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10].map(x => x ^ 16);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${shift8x16_pattern.join(' ')} (v128.const i32x4 0 0 0 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shift-left 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), shift8x16_pattern.map(x => x < 16 ? 0 : x - 16));
+}
+
+// Operands differ, both accessed, rhs is constant zero, left-shift pattern that
+// does not start properly.
+{
+ // 8-bit shift with zeroes shifted in at the right end
+ let shift8x16_pattern = [16, 16, 16, 16, 16, 16, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${shift8x16_pattern.join(' ')} (local.get 0) (v128.const i32x4 0 0 0 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shuffle+blend 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), shift8x16_pattern.map(x => x >= 16 ? 0 : x));
+}
+
+// Operands differ, both accessed, rhs is constant zero, right-shift pattern
+{
+ // 8-bit shift with zeroes shifted in at the right end
+ let shift8x16_pattern = [6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 20, 20, 20, 20, 20];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${shift8x16_pattern.join(' ')} (local.get 0) (v128.const i32x4 0 0 0 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shift-right 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), shift8x16_pattern.map(x => x >= 16 ? 0 : x));
+}
+
+// Operands differ, both accessed, rhs is constant zero, right-shift pattern
+// that does not end properly.
+{
+ // 8-bit shift with zeroes shifted in at the right end
+ let shift8x16_pattern = [6, 7, 8, 9, 10, 11, 12, 13, 14, 20, 20, 20, 20, 20, 20, 20];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${shift8x16_pattern.join(' ')} (local.get 0) (v128.const i32x4 0 0 0 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shuffle+blend 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), shift8x16_pattern.map(x => x >= 16 ? 0 : x));
+}
+
+// Operands differ and are variable, both accessed, (lhs ++ rhs) >> k
+{
+ let concat8x16_pattern = [27, 28, 29, 30, 31, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${concat8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> concat+shift-right 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ set(mem, 32, iota(16).map(k => k+16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), concat8x16_pattern);
+}
+
+// Operands differ and are variable, both accessed, (rhs ++ lhs) >> k
+{
+ let concat8x16_pattern = [11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${concat8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> concat+shift-right 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ set(mem, 32, iota(16).map(k => k+16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), concat8x16_pattern);
+}
+
+// Operands differ, both accessed, but inputs stay in their lanes => byte blend
+{
+ let blend8x16_pattern = iota(16).map(x => (x % 3 == 0) ? x + 16 : x);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${blend8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> blend 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhs = iota(16);
+ let rhs = iota(16).map(x => x+16);
+ set(mem, 16, lhs);
+ set(mem, 32, rhs);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), blend8x16_pattern);
+}
+
+// Operands differ, both accessed, but inputs stay in their lanes => word blend
+{
+ let blend16x8_pattern = iota(16).map(x => (x & 2) ? x + 16 : x);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${blend16x8_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> blend 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhs = iota(16);
+ let rhs = iota(16).map(x => x+16);
+ set(mem, 16, lhs);
+ set(mem, 32, rhs);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), blend16x8_pattern);
+}
+
+// Interleave i32x4s
+for ( let [lhs, rhs, expected] of
+ [[[0, 1], [4, 5], "shuffle -> interleave-low 32x4"],
+ [[2, 3], [6, 7], "shuffle -> interleave-high 32x4"]] ) {
+ for (let swap of [false, true]) {
+ if (swap)
+ [lhs, rhs] = [rhs, lhs];
+ let interleave_pattern = i32ToI8(interleave(lhs, rhs));
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${interleave_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), expected);
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhsval = iota(16);
+ let rhsval = iota(16).map(x => x+16);
+ set(mem, 16, lhsval);
+ set(mem, 32, rhsval);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), interleave_pattern);
+ }
+}
+
+// Interleave i64x2s
+for ( let [lhs, rhs, expected] of
+ [[[0], [2], "shuffle -> interleave-low 64x2"],
+ [[1], [3], "shuffle -> interleave-high 64x2"]] ) {
+ for (let swap of [false, true]) {
+ if (swap)
+ [lhs, rhs] = [rhs, lhs];
+ let interleave_pattern = i64ToI2(interleave(lhs, rhs));
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${interleave_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), expected);
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhsval = iota(16);
+ let rhsval = iota(16).map(x => x+16);
+ set(mem, 16, lhsval);
+ set(mem, 32, rhsval);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), interleave_pattern);
+ }
+}
+
+// Interleave i16x8s
+for ( let [lhs, rhs, expected] of
+ [[[0, 1, 2, 3], [8, 9, 10, 11], "shuffle -> interleave-low 16x8"],
+ [[4, 5, 6, 7], [12, 13, 14, 15], "shuffle -> interleave-high 16x8"]] ) {
+ for (let swap of [false, true]) {
+ if (swap)
+ [lhs, rhs] = [rhs, lhs];
+ let interleave_pattern = i16ToI8(interleave(lhs, rhs));
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${interleave_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), expected);
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhsval = iota(16);
+ let rhsval = iota(16).map(x => x+16);
+ set(mem, 16, lhsval);
+ set(mem, 32, rhsval);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), interleave_pattern);
+ }
+}
+
+// Interleave i8x16s
+for ( let [lhs, rhs, expected] of
+ [[[0, 1, 2, 3, 4, 5, 6, 7], [16, 17, 18, 19, 20, 21, 22, 23], "shuffle -> interleave-low 8x16"],
+ [[8, 9, 10, 11, 12, 13, 14, 15],[24, 25, 26, 27, 28, 29, 30, 31], "shuffle -> interleave-high 8x16"]] ) {
+ for (let swap of [false, true]) {
+ if (swap)
+ [lhs, rhs] = [rhs, lhs];
+ let interleave_pattern = interleave(lhs, rhs);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${interleave_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), expected);
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhsval = iota(16);
+ let rhsval = iota(16).map(x => x+16);
+ set(mem, 16, lhsval);
+ set(mem, 32, rhsval);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), interleave_pattern);
+ }
+}
+
+// Operands differ, both accessed, random jumble => byte shuffle+blend
+{
+ let blend_perm8x16_pattern = [5, 23, 6, 24, 9, 10, 11, 7, 7, 14, 15, 19, 1, 2, 3, 12];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${blend_perm8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> shuffle+blend 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ let lhs = iota(16).map(x => x+16);
+ let rhs = iota(16);
+ set(mem, 16, lhs);
+ set(mem, 32, rhs);
+ ins.exports.run();
+ assertSame(get(mem, 0, 16),
+ blend_perm8x16_pattern.map(x => x < 16 ? lhs[x] : rhs[x-16]));
+}
+
+// No-op, ignoring right operand, should turn into a move.
+{
+ let nop8x16_pattern = iota(16);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${nop8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> move");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ set(mem, 32, iota(16).map(x => x+16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), nop8x16_pattern);
+}
+
+// No-op, ignoring left operand, should turn into a move.
+{
+ let nop8x16_pattern = iota(16).map(x => x+16);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)) (v128.load (i32.const 32)))))
+ (func $f (param v128) (param v128) (result v128)
+ (i8x16.shuffle ${nop8x16_pattern.join(' ')} (local.get 0) (local.get 1))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> move");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ set(mem, 32, iota(16).map(x => x+16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), nop8x16_pattern);
+}
+
+// Broadcast byte
+for ( let byte of [3, 11, 8, 2] ) {
+ let broadcast8x16_pattern = iota(16).map(_ => byte);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${broadcast8x16_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> broadcast 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), broadcast8x16_pattern);
+}
+
+// Broadcast word from high quadword
+{
+ let broadcast16x8_pattern = [10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${broadcast16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> broadcast 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), broadcast16x8_pattern);
+}
+
+// Broadcast word from low quadword
+{
+ let broadcast16x8_pattern = [4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5, 4, 5];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${broadcast16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> broadcast 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), broadcast16x8_pattern);
+}
+
+// Broadcast dword from low quadword should turn into a dword permute
+{
+ let broadcast32x4_pattern = [4, 5, 6, 7, 4, 5, 6, 7, 4, 5, 6, 7, 4, 5, 6, 7];
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${broadcast32x4_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), broadcast32x4_pattern);
+}
+
+// Broadcast high qword should turn into a dword permute
+{
+ let broadcast64x2_pattern = [8, 9, 10, 11, 12, 13, 14, 15, 8, 9, 10, 11, 12, 13, 14, 15]
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${broadcast64x2_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), broadcast64x2_pattern);
+}
+
+// Byte reversal should be a byte permute
+{
+ let rev8x16_pattern = iota(16).reverse();
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${rev8x16_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 8x16");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rev8x16_pattern);
+}
+
+// Byteswap of half-word, word and quad-word groups should be
+// reverse bytes analysis
+for (let k of [2, 4, 8]) {
+ let rev8_pattern = iota(16).map(i => i ^ (k - 1));
+ let ins = wasmCompile(`
+(module
+(memory (export "mem") 1 1)
+(func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+(func $f (param v128) (result v128)
+ (i8x16.shuffle ${rev8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), `shuffle -> reverse bytes in ${8 * k}-bit lanes`);
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rev8_pattern);
+}
+
+// Word reversal should be a word permute
+{
+ let rev16x8_pattern = i16ToI8(iota(8).reverse());
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${rev16x8_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 16x8");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rev16x8_pattern);
+}
+
+// Dword reversal should be a dword permute
+{
+ let rev32x4_pattern = i32ToI8([3, 2, 1, 0]);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${rev32x4_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rev32x4_pattern);
+}
+
+// Qword reversal should be a dword permute
+{
+ let rev64x2_pattern = i32ToI8([2, 3, 0, 1]);
+ let ins = wasmCompile(`
+(module
+ (memory (export "mem") 1 1)
+ (func (export "run")
+ (v128.store (i32.const 0) (call $f (v128.load (i32.const 16)))))
+ (func $f (param v128) (result v128)
+ (i8x16.shuffle ${rev64x2_pattern.join(' ')} (local.get 0) (local.get 0))))`);
+
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+
+ let mem = new Int8Array(ins.exports.mem.buffer);
+ set(mem, 16, iota(16));
+ ins.exports.run();
+ assertSame(get(mem, 0, 16), rev64x2_pattern);
+}
+
+// In the case of shifts, we have separate tests that constant shifts work
+// correctly, so no such testing is done here.
+
+for ( let lanes of ['i8x16', 'i16x8', 'i32x4', 'i64x2'] ) {
+ for ( let shift of ['shl', 'shr_s', 'shr_u'] ) {
+ for ( let [count, result] of [['(i32.const 5)', /shift -> constant shift/],
+ ['(local.get 1)', /shift -> variable(?: scalarized)? shift/]] ) {
+ wasmCompile(`(module (func (param v128) (param i32) (result v128) (${lanes}.${shift} (local.get 0) ${count})))`);
+ assertEq(wasmSimdAnalysis().match(result).length, 1);
+ }
+ }
+}
+
+// Constant folding scalar->simd. There are functional tests for all these in
+// ad-hack.js so here we only check that the transformation is triggered.
+
+for ( let [ty128, ty] of [['i8x16', 'i32'], ['i16x8', 'i32'], ['i32x4', 'i32'],
+ ['i64x2', 'i64'], ['f32x4', 'f32'], ['f64x2', 'f64']] )
+{
+ wasmCompile(`(module (func (result v128) (${ty128}.splat (${ty}.const 37))))`);
+ assertEq(wasmSimdAnalysis(), "scalar-to-simd128 -> constant folded");
+}
+
+// Ditto simd->scalar.
+
+for ( let [ty128, suffix] of [['i8x16', '_s'], ['i8x16', '_u'], ['i16x8','_s'], ['i16x8','_u'], ['i32x4', '']] ) {
+ for ( let op of ['any_true', 'all_true', 'bitmask', `extract_lane${suffix} 0`] ) {
+ let operation = op == 'any_true' ? 'v128.any_true' : `${ty128}.${op}`;
+ wasmCompile(`(module (func (result i32) (${operation} (v128.const i64x2 0 0))))`);
+ assertEq(wasmSimdAnalysis(), "simd128-to-scalar -> constant folded");
+ }
+}
+
+for ( let ty128 of ['f32x4','f64x2','i64x2'] ) {
+ wasmCompile(`(module (func (result ${ty128.match(/(...)x.*/)[1]}) (${ty128}.extract_lane 0 (v128.const i64x2 0 0))))`);
+ assertEq(wasmSimdAnalysis(), "simd128-to-scalar -> constant folded");
+}
+
+// Optimizing all_true, any_true, and bitmask that are used for control flow, also when negated.
+
+for ( let [ty128,size] of [['i8x16',1], ['i16x8',2], ['i32x4',4]] ) {
+ let all = iota(16/size).map(n => n*n);
+ let some = iota(16/size).map(n => n*(n % 3));
+ let none = iota(16/size).map(n => 0);
+ let inputs = [all, some, none];
+ let ops = { all_true: allTrue, any_true: anyTrue, bitmask };
+
+ for ( let op of ['any_true', 'all_true', 'bitmask'] ) {
+ let folded = op != 'bitmask' || (size == 2 && !isArm64);
+ let operation = op == 'any_true' ? 'v128.any_true' : `${ty128}.${op}`;
+ let positive =
+ wasmCompile(
+ `(module
+ (memory (export "mem") 1 1)
+ (func $f (param v128) (result i32)
+ (if (result i32) (${operation} (local.get 0))
+ (i32.const 42)
+ (i32.const 37)))
+ (func (export "run") (result i32)
+ (call $f (v128.load (i32.const 16)))))`);
+ assertEq(wasmSimdAnalysis(), folded ? "simd128-to-scalar-and-branch -> folded" : "none");
+
+ let negative =
+ wasmCompile(
+ `(module
+ (memory (export "mem") 1 1)
+ (func $f (param v128) (result i32)
+ (if (result i32) (i32.eqz (${operation} (local.get 0)))
+ (i32.const 42)
+ (i32.const 37)))
+ (func (export "run") (result i32)
+ (call $f (v128.load (i32.const 16)))))`);
+ assertEq(wasmSimdAnalysis(), folded ? "simd128-to-scalar-and-branch -> folded" : "none");
+
+ for ( let inp of inputs ) {
+ let mem = new this[`Int${8*size}Array`](positive.exports.mem.buffer);
+ set(mem, 16/size, inp);
+ assertEq(positive.exports.run(), ops[op](inp) ? 42 : 37);
+
+ mem = new this[`Int${8*size}Array`](negative.exports.mem.buffer);
+ set(mem, 16/size, inp);
+ assertEq(negative.exports.run(), ops[op](inp) ? 37 : 42);
+ }
+ }
+}
+
+// Constant folding
+
+{
+ // Swizzle-with-constant rewritten as shuffle, and then further optimized
+ // into a dword permute. Correctness is tested in ad-hack.js.
+ wasmCompile(`
+(module (func (param v128) (result v128)
+ (i8x16.swizzle (local.get 0) (v128.const i8x16 4 5 6 7 0 1 2 3 12 13 14 15 8 9 10 11))))
+`);
+ assertEq(wasmSimdAnalysis(), "shuffle -> permute 32x4");
+}
+
+// Bitselect with constant mask folded into shuffle operation
+
+if (!isArm64) {
+ wasmCompile(`
+ (module (func (param v128) (param v128) (result v128)
+ (v128.bitselect (local.get 0) (local.get 1) (v128.const i8x16 0 -1 -1 0 0 0 0 0 -1 -1 -1 -1 -1 -1 0 0))))
+ `);
+ assertEq(wasmSimdAnalysis(), "shuffle -> blend 8x16");
+}
+
+// Library
+
+function wasmCompile(text) {
+ return new WebAssembly.Instance(new WebAssembly.Module(wasmTextToBinary(text)))
+}
+
+function get(arr, loc, len) {
+ let res = [];
+ for ( let i=0; i < len; i++ ) {
+ res.push(arr[loc+i]);
+ }
+ return res;
+}
+
+function set(arr, loc, vals) {
+ for ( let i=0; i < vals.length; i++ ) {
+ arr[loc+i] = vals[i];
+ }
+}
+
+function i32ToI8(xs) {
+ return xs.map(x => [x*4, x*4+1, x*4+2, x*4+3]).flat();
+}
+
+function i64ToI2(xs) {
+ return xs.map(x => [x*8, x*8+1, x*8+2, x*8+3,
+ x*8+4, x*8+5, x*8+6, x*8+7]).flat();
+}
+
+function i16ToI8(xs) {
+ return xs.map(x => [x*2, x*2+1]).flat();
+}
+
+function allTrue(xs) {
+ return xs.every(v => v != 0);
+}
+
+function anyTrue(xs) {
+ return xs.some(v => v != 0);
+}
+
+function bitmask(xs) {
+ let shift = 128/xs.length - 1;
+ let res = 0;
+ let k = 0;
+ xs.forEach(v => { res |= ((v >>> shift) & 1) << k; k++; });
+ return res;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-20 10:48:55 +0000