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ispc

Manual

ispc

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHOR

NAME

ispc - Intel Implicit SPMD Program Compiler

SYNOPSIS

ispc [ options ] file

DESCRIPTION

ispc is a compiler for a variant of the C programming language, with extensions for single program, multiple data programming. Under the SPMD model, the programmer writes a program that generally appears to be a regular serial program, though the execution model is actually that a number of program instances execute in parallel on the hardware.

OPTIONS

--addressing { 32,64 }

Select 32- or 64- 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

AUTHOR

ispc is written by Intel Corporation.

This manual page was written by Yangfl for the Debian Project (and may be used by others).