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8753796aac
This is used to ensure that assignments to host-visible memory do not modify padding bytes in structures and arrays. We decompose assignments of whole structure and array types into member-wise or element-wise copies, using helper functions. This is used in all backends except HLSL, which already decomposes memory accesses. Bug: tint:1571 Change-Id: Id6de2f917fb80151cc654a7e1c8413ae956f0d61 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/112720 Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: James Price <jrprice@google.com>
59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
#include <metal_stdlib>
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using namespace metal;
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template<typename T, size_t N>
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struct tint_array {
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const constant T& operator[](size_t i) const constant { return elements[i]; }
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device T& operator[](size_t i) device { return elements[i]; }
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const device T& operator[](size_t i) const device { return elements[i]; }
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thread T& operator[](size_t i) thread { return elements[i]; }
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const thread T& operator[](size_t i) const thread { return elements[i]; }
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threadgroup T& operator[](size_t i) threadgroup { return elements[i]; }
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const threadgroup T& operator[](size_t i) const threadgroup { return elements[i]; }
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T elements[N];
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};
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struct strided_arr {
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/* 0x0000 */ float2 el;
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/* 0x0008 */ tint_array<int8_t, 8> tint_pad;
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};
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struct SSBO {
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/* 0x0000 */ tint_array<strided_arr, 2> m;
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};
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float2x2 arr_to_mat2x2_stride_16(tint_array<strided_arr, 2> arr) {
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return float2x2(arr[0u].el, arr[1u].el);
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}
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tint_array<strided_arr, 2> mat2x2_stride_16_to_arr(float2x2 m) {
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strided_arr const tint_symbol_1 = {.el=m[0u]};
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strided_arr const tint_symbol_2 = {.el=m[1u]};
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tint_array<strided_arr, 2> const tint_symbol_3 = tint_array<strided_arr, 2>{tint_symbol_1, tint_symbol_2};
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return tint_symbol_3;
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}
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void assign_and_preserve_padding_1(device strided_arr* const dest, strided_arr value) {
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(*(dest)).el = value.el;
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}
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void assign_and_preserve_padding(device tint_array<strided_arr, 2>* const dest, tint_array<strided_arr, 2> value) {
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for(uint i = 0u; (i < 2u); i = (i + 1u)) {
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assign_and_preserve_padding_1(&((*(dest))[i]), value[i]);
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}
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}
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void f_1(device SSBO* const tint_symbol_4) {
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float2x2 const x_15 = arr_to_mat2x2_stride_16((*(tint_symbol_4)).m);
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tint_array<strided_arr, 2> const tint_symbol = mat2x2_stride_16_to_arr(x_15);
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assign_and_preserve_padding(&((*(tint_symbol_4)).m), tint_symbol);
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return;
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}
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kernel void f(device SSBO* tint_symbol_5 [[buffer(0)]]) {
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f_1(tint_symbol_5);
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return;
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}
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