dawn-cmake/test/bug/tint/744.wgsl.expected.msl
Ben Clayton 7103f51603 writer/msl: Fix swizzling on packed vectors
Metal 1.x does not support swizzling on packed_vec types.
Use array-index for single element selection (permitted on LHS and RHS of assignment)
Cast the packed_vec to a vec for multiple element swizzles (not permitted as the LHS of an assignment).

Fixed: tint:1249
Change-Id: I70cbb0c22a935b06b3905d24484bdc2edfb95fc2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/67060
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
2021-10-20 16:12:33 +00:00

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#include <metal_stdlib>
using namespace metal;
struct Uniforms {
/* 0x0000 */ uint2 aShape;
/* 0x0008 */ uint2 bShape;
/* 0x0010 */ uint2 outShape;
};
struct Matrix {
/* 0x0000 */ uint numbers[1];
};
void tint_symbol_inner(constant Uniforms& uniforms, const device Matrix& firstMatrix, const device Matrix& secondMatrix, device Matrix& resultMatrix, uint3 global_id) {
uint2 const resultCell = uint2(global_id[1], global_id[0]);
uint const dimInner = uniforms.aShape[1];
uint const dimOutter = uniforms.outShape[1];
uint result = 0u;
for(uint i = 0u; (i < dimInner); i = (i + 1u)) {
uint const a = (i + (resultCell[0] * dimInner));
uint const b = (resultCell[1] + (i * dimOutter));
result = (result + (firstMatrix.numbers[a] * secondMatrix.numbers[b]));
}
uint const index = (resultCell[1] + (resultCell[0] * dimOutter));
resultMatrix.numbers[index] = result;
}
kernel void tint_symbol(uint3 global_id [[thread_position_in_grid]], constant Uniforms& uniforms [[buffer(0)]], const device Matrix& firstMatrix [[buffer(2)]], const device Matrix& secondMatrix [[buffer(3)]], device Matrix& resultMatrix [[buffer(1)]]) {
tint_symbol_inner(uniforms, firstMatrix, secondMatrix, resultMatrix, global_id);
return;
}