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dd5fe2f3de
This is support-code to emit the DirectX Intermediate Language, which is a dialect of LLVM 3.7 bitcode. Because modern versions of LLVM doesn't support emitting bitcode for older versions, and we can't rely on an old LLVM version because we need the OpenCL support from Clang later on, we instead implement our own LLVM bitcode encoder as part of this work. See the official DXIL documentation for more details on DXIL: https://github.com/Microsoft/DirectXShaderCompiler/blob/master/docs/DXIL.rst The reason this comes as a separate library, is because we're also using this code as the basis for an OpenCL C compiler, which will follow as a separate merge-request later. This is the combination of more than 230 commits from our development branch, including the work from several authors. Co-authored-by: Bill Kristiansen <billkris@microsoft.com> Co-authored-by: Boris Brezillon <boris.brezillon@collabora.com> Co-authored-by: Daniel Stone <daniels@collabora.com> Co-authored-by: Gert Wollny <gert.wollny@collabora.com> Co-authored-by: Jesse Natalie <jenatali@microsoft.com> Co-authored-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com> Acked-by: Jason Ekstrand <jason@jlekstrand.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7477>
104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Copyright © Microsoft Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "dxil_buffer.h"
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#include <assert.h>
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void
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dxil_buffer_init(struct dxil_buffer *b, unsigned abbrev_width)
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{
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blob_init(&b->blob);
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b->buf = 0;
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b->buf_bits = 0;
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b->abbrev_width = abbrev_width;
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}
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void
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dxil_buffer_finish(struct dxil_buffer *b)
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{
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blob_finish(&b->blob);
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}
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static bool
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flush_dword(struct dxil_buffer *b)
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{
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assert(b->buf_bits >= 32 && b->buf_bits < 64);
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uint32_t lower_bits = b->buf & UINT32_MAX;
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if (!blob_write_bytes(&b->blob, &lower_bits, sizeof(lower_bits)))
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return false;
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b->buf >>= 32;
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b->buf_bits -= 32;
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return true;
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}
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bool
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dxil_buffer_emit_bits(struct dxil_buffer *b, uint32_t data, unsigned width)
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{
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assert(b->buf_bits < 32);
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assert(width > 0 && width <= 32);
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assert((data & ~((UINT64_C(1) << width) - 1)) == 0);
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b->buf |= ((uint64_t)data) << b->buf_bits;
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b->buf_bits += width;
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if (b->buf_bits >= 32)
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return flush_dword(b);
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return true;
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}
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bool
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dxil_buffer_emit_vbr_bits(struct dxil_buffer *b, uint64_t data,
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unsigned width)
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{
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assert(width > 1 && width <= 32);
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uint32_t tag = UINT32_C(1) << (width - 1);
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uint32_t max = tag - 1;
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while (data > max) {
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uint32_t value = (data & max) | tag;
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data >>= width - 1;
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if (!dxil_buffer_emit_bits(b, value, width))
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return false;
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}
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return dxil_buffer_emit_bits(b, data, width);
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}
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bool
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dxil_buffer_align(struct dxil_buffer *b)
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{
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assert(b->buf_bits < 32);
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if (b->buf_bits) {
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b->buf_bits = 32;
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return flush_dword(b);
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}
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return true;
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}
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