--addressing {32,64}
Select 32-or64-bit addressing. (Note that 32-bit addressing calculations are done by default,
even on 64-bit target architectures.)
--arch {x86,x86-64,arm,aarch64,wasm32}
Select target architecture
--colored-output
Always use terminal colors in error/warning messages
--cpu<type>
An alias for --device<type> switch
-D<foo>
#define given value when running preprocessor
--dev-stub<filename>
Emit device-side offload stub functions to file
--device<type>
Select target device
<type> = { x86-64 , atom (synonyms: bonnell ), core2,penryn,corei7 (synonyms: nehalem ), btver2
(synonyms: ps4 ), corei7-avx (synonyms: sandybridge ), core-avx-i(synonyms:ivybridge ),
core-avx2 (synonyms: haswell ), broadwell,skylake,knl,skx,icelake-client (synonyms: icl ), slm
(synonyms: silvermont ), icelake-server (synonyms: icx ), tigerlake (synonyms: tgl ), alderlake
(synonyms: adl ), sapphirerapids (synonyms: spr ), znver1,znver2 (synonyms: ps5 ), znver3,cortex-a9,cortex-a15,cortex-a35,cortex-a53,cortex-a57,apple-a7,apple-a10,apple-a11,apple-a12,apple-a13,apple-a14 }
--dllexport
Make non-static functions DLL exported. Windows target only
--dwarf-version {2,3,4}
Generate source-level debug information with given DWARF version (triggers -g ). Ignored for
Windows target
-E Run only the preprocessor
--emit-asm
Generate assembly language file as output
--emit-llvm
Emit LLVM bitcode file as output
--emit-llvm-text
Emit LLVM bitcode file as output in textual form
--emit-obj
Generate object file file as output (default)
--enable-llvm-intrinsics
Enable experimental feature to call LLVM intrinsics from ISPC source code
--error-limit<value>
Limit maximum number of errors emitting by ISPC to <value>--force-alignment<value>
Force alignment in memory allocations routine to be <value>-g Generate source-level debug information
--help Print help
--help-dev
Print help for developer options
--host-stub<filename>
Emit host-side offload stub functions to file
-h<name>/--header-outfile<name>
Output filename for header
-I<path>
Add <path> to #include file search path
--ignore-preprocessor-errors
Suppress errors from the preprocessor
--instrument
Emit instrumentation to gather performance data
--math-lib<option>
Select math library
default
Use ispc's built-in math functions
fast Use high-performance but lower-accuracy math functions
svml Use the Intel(r) SVML math libraries
system Use the system's math library (*may be quite slow*)
-MMM<filename>
Write #include dependencies to given file.
-M Output a rule suitable for make describing the dependencies of the main source file to stdout.
-MF<filename>
When used with -M, specifies a file to write the dependencies to.
-MT<filename>
When used with -M, changes the target of the rule emitted by dependency generation.
--no-omit-frame-pointer
Disable frame pointer omission. It may be useful for profiling
--nostdlib
Don't make the ispc standard library available
--no-pragma-once
Don't use #pragma once in created headers
--nocpp
Don't run the C preprocessor
-o<name>/--outfile<name>
Output filename (may be "-" for standard output)
-O0/-O(1/2/3)
Set optimization level. Default behavior is to optimize for speed.
-O0 Optimizations disabled.
-O1 Optimization for size.
-O2/O3--opt<option>
Set optimization option
disable-assertions
Remove assertion statements from final code.
disable-fma
Disable 'fused multiply-add' instructions (on targets that support them)
disable-loop-unroll
Disable loop unrolling.
disable-zmm
Disable using zmm registers for avx512 targets in favour of ymm. This also affects ABI.
fast-masked-vload
Faster masked vector loads on SSE (may go past end of array)
fast-math
Perform non-IEEE-compliant optimizations of numeric expressions
force-aligned-memory
Always issue "aligned" vector load and store instructions
--pic Generate position-independent code. Ignored for Windows target
--quiet
Suppress all output
--support-matrix
Print full matrix of supported targets, architectures and OSes
--target<t>
Select target ISA and width. <t> ={ sse2-i32x4,sse2-i32x8,sse4-i8x16,sse4-i16x8,sse4-i32x4,sse4-i32x8,avx1-i32x4,avx1-i32x8,avx1-i32x16,avx1-i64x4,avx2-i8x32,avx2-i16x16,avx2-i32x4,avx2-i32x8,avx2-i32x16,avx2-i64x4,avx512knl-x16,avx512skx-x4,avx512skx-x8,avx512skx-x16,avx512skx-x32,avx512skx-x64,neon-i8x16,neon-i16x8,neon-i32x4,neon-i32x8,wasm-i32x4 }
--target-os<os>
Select target OS. <os> ={ linux,custom_linux,freebsd,android,web }
--time-trace
Turn on time profiler. Generates JSON file based on output filename.
--time-trace-granularity<value>
Minimum time granularity (in microseconds) traced by time profiler.
--vectorcall/--no-vectorcall
Enable/disable vectorcall calling convention on Windows (x64 only). Disabled by default
--version
Print ispc version
--werror
Treat warnings as errors
--woff Disable warnings
--wno-perf
Don't issue warnings related to performance-related issues
--x86-asm-syntax<option>
Select style of code if generating assembly
intel Emit Intel-style assembly
att Emit AT&T-style assembly
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