From: Sebastian Huber <sebastian.huber@embedded-brains.de>
To: gcc-help@gcc.gnu.org
Subject: Why does GCC drop "+simd" for the assembler if compiling for Armv8-A or Armv8-R?
Date: Thu, 3 Dec 2020 13:25:46 +0100 [thread overview]
Message-ID: <71fc3de0-dbb1-219e-1baf-ddf59e5466c3@embedded-brains.de> (raw)
Hello,
I have a problem that assembler files assembled by GCC issue errors due
to incomplete architecture and FPU options which should be provided by
the assembler command line and not as directives in the file. For example:
arm-rtems6-gcc -save-temps -c test.c -mthumb -march=armv8-a+crc+simd
-mfloat-abi=hard -wrapper echo
/tmp/sh/rtems/6/lib/gcc/arm-rtems6/10.2.1/cc1 -E -quiet
-D__USES_INITFINI__ test.c -mthumb -mfloat-abi=hard
-march=armv8-a+crc+simd -fpch-preprocess -o test.i
/tmp/sh/rtems/6/lib/gcc/arm-rtems6/10.2.1/cc1 -fpreprocessed test.i
-quiet -dumpbase test.c -mthumb -mfloat-abi=hard -march=armv8-a+crc+simd
-auxbase test -o test.s
/tmp/sh/rtems/6/lib64/gcc/arm-rtems6/10.2.1/../../../../arm-rtems6/bin/as
-march=armv8-a+crc -mfloat-abi=hard -meabi=5 -o test.o test.s
arm-rtems6-gcc -save-temps -c test.c -mthumb -march=armv8-r+crc+simd
-mfloat-abi=hard -wrapper echo
/tmp/sh/rtems/6/lib/gcc/arm-rtems6/10.2.1/cc1 -E -quiet
-D__USES_INITFINI__ test.c -mthumb -mfloat-abi=hard
-march=armv8-r+crc+simd -fpch-preprocess -o test.i
/tmp/sh/rtems/6/lib/gcc/arm-rtems6/10.2.1/cc1 -fpreprocessed test.i
-quiet -dumpbase test.c -mthumb -mfloat-abi=hard -march=armv8-r+crc+simd
-auxbase test -o test.s
/tmp/sh/rtems/6/lib64/gcc/arm-rtems6/10.2.1/../../../../arm-rtems6/bin/as
-march=armv8-r+crc -mfloat-abi=hard -meabi=5 -o test.o test.s
The assembler is called without the "+simd". In Armv7-A and Armv7-R the
FPU was selected by -mfpu options.
--
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next reply other threads:[~2020-12-03 12:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 12:25 Sebastian Huber [this message]
2020-12-03 12:53 ` Sebastian Huber
2020-12-03 14:25 ` Sebastian Huber
2020-12-04 8:15 ` Sebastian Huber
2020-12-09 14:53 ` Richard Earnshaw
2020-12-09 15:07 ` Sebastian Huber
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