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Make compiled preamble work in MSVC (#1675)

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* Make compiled preamble work in MSVC

* Remove logging

* Only use powershell for MSVC
This commit is contained in:
Cheng 2024-12-13 01:55:49 +09:00 committed by GitHub
parent 3a21f61772
commit 4d595a2a39
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GPG Key ID: B5690EEEBB952194
2 changed files with 48 additions and 2 deletions
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12
mlx/backend/common/CMakeLists.txt
View File

@ -5,13 +5,21 @@ else()
set(COMPILER ${CMAKE_CXX_COMPILER})
endif()
if(MSVC)
set(SHELL_EXT ps1)
set(SHELL_CMD powershell -ExecutionPolicy Bypass -File)
else()
set(SHELL_EXT sh)
set(SHELL_CMD /bin/bash)
endif()
add_custom_command(
OUTPUT compiled_preamble.cpp
COMMAND
/bin/bash ${CMAKE_CURRENT_SOURCE_DIR}/make_compiled_preamble.sh
${SHELL_CMD} ${CMAKE_CURRENT_SOURCE_DIR}/make_compiled_preamble.${SHELL_EXT}
${CMAKE_CURRENT_BINARY_DIR}/compiled_preamble.cpp ${COMPILER}
${PROJECT_SOURCE_DIR} ${CLANG} ${CMAKE_SYSTEM_PROCESSOR}
DEPENDS make_compiled_preamble.sh
DEPENDS make_compiled_preamble.${SHELL_EXT}
compiled_preamble.h
${PROJECT_SOURCE_DIR}/mlx/types/half_types.h
${PROJECT_SOURCE_DIR}/mlx/types/fp16.h

38
mlx/backend/common/make_compiled_preamble.ps1 Normal file
View File

@ -0,0 +1,38 @@
# This script generates a C++ function that provides the CPU
# code for use with kernel generation.
#
# Copyright © 2024 Apple Inc.
$OUTPUT_FILE = $args[0]
$CL = $args[1]
$SRCDIR = $args[2]
# Get command result as array.
$CONTENT = & $CL /std:c++17 /EP "/I$SRCDIR" /Tp "$SRCDIR/mlx/backend/common/compiled_preamble.h"
# Remove empty lines.
# Otherwise there will be too much empty lines making the result unreadable.
$CONTENT = $CONTENT | Where-Object { $_.Trim() -ne '' }
# Concatenate to string.
$CONTENT = $CONTENT -join '`n'
# Append extra content.
$CONTENT = @"
$($CONTENT)
using namespace mlx::core;
using namespace mlx::core::detail;
"@
# Convert each char to ASCII code.
# Unlike the unix script that outputs string literal directly, the output from
# MSVC is way too large to be embedded as string and compilation will fail, so
# we store it as static array instead.
$CHARCODES = ([System.Text.Encoding]::ASCII.GetBytes($CONTENT) -join ', ') + ', 0'
$OUTPUT = @"
const char* get_kernel_preamble() {
static char preamble[] = { $CHARCODES };
return preamble;
}
"@
Set-Content -Path $OUTPUT_FILE -Value $OUTPUT