X86 Linux kernel is compiled only with integer instructions. Currently, -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-80387 -mno-fp-ret-in-387 -mskip-rax-setup is used to compile kernel. If we add another non-integer feature, it has to be turned off. We can add a -minteger-only option to disable all non-integer features so that kernel doesn't need a long list and the same option will work for future compilers.
AArch64 already has a similar option already. We've called it -mgeneral-regs-only.
Author: hjl Date: Fri May 20 16:06:39 2016 New Revision: 236520 URL: https://gcc.gnu.org/viewcvs?rev=236520&root=gcc&view=rev Log: Add -mgeneral-regs-only option X86 Linux kernel is compiled only with integer instructions. Currently, -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -mno-80387 -mno-fp-ret-in-387 -mskip-rax-setup is used to compile kernel. If we add another non-integer feature, it has to be turned off. We can add a -mgeneral-regs-only option, similar to AArch64, to disable all non-integer features so that kernel doesn't need a long list and the same option will work for future compilers. It can also be used to compile interrupt handler. gcc/ PR target/70738 * common/config/i386/i386-common.c (OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET): New. (ix86_handle_option): Disable MPX, MMX, SSE and x87 instructions for -mgeneral-regs-only. * config/i386/i386.c (ix86_option_override_internal): Don't enable x87 instructions if only the general registers are allowed. * config/i386/i386.opt: Add -mgeneral-regs-only. * doc/invoke.texi: Document -mgeneral-regs-only. gcc/testsuite/ PR target/70738 * gcc.target/i386/pr70738-1.c: Likewise. * gcc.target/i386/pr70738-2.c: Likewise. * gcc.target/i386/pr70738-3.c: Likewise. * gcc.target/i386/pr70738-4.c: Likewise. * gcc.target/i386/pr70738-5.c: Likewise. * gcc.target/i386/pr70738-6.c: Likewise. * gcc.target/i386/pr70738-7.c: Likewise. * gcc.target/i386/pr70738-8.c: Likewise. * gcc.target/i386/pr70738-9.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/i386/pr70738-1.c trunk/gcc/testsuite/gcc.target/i386/pr70738-2.c trunk/gcc/testsuite/gcc.target/i386/pr70738-3.c trunk/gcc/testsuite/gcc.target/i386/pr70738-4.c trunk/gcc/testsuite/gcc.target/i386/pr70738-5.c trunk/gcc/testsuite/gcc.target/i386/pr70738-6.c trunk/gcc/testsuite/gcc.target/i386/pr70738-7.c trunk/gcc/testsuite/gcc.target/i386/pr70738-8.c trunk/gcc/testsuite/gcc.target/i386/pr70738-9.c Modified: trunk/gcc/ChangeLog trunk/gcc/common/config/i386/i386-common.c trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.opt trunk/gcc/doc/invoke.texi trunk/gcc/testsuite/ChangeLog
Fixed for 7.0.
Author: uros Date: Sun May 22 17:20:10 2016 New Revision: 236570 URL: https://gcc.gnu.org/viewcvs?rev=236570&root=gcc&view=rev Log: Revert: gcc/ PR target/70738 * common/config/i386/i386-common.c (OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET): New. (ix86_handle_option): Disable MPX, MMX, SSE and x87 instructions for -mgeneral-regs-only. * config/i386/i386.c (ix86_option_override_internal): Don't enable x87 instructions if only the general registers are allowed. * config/i386/i386.opt: Add -mgeneral-regs-only. * doc/invoke.texi: Document -mgeneral-regs-only. gcc/testsuite/ PR target/70738 * gcc.target/i386/pr70738-1.c: Likewise. * gcc.target/i386/pr70738-2.c: Likewise. * gcc.target/i386/pr70738-3.c: Likewise. * gcc.target/i386/pr70738-4.c: Likewise. * gcc.target/i386/pr70738-5.c: Likewise. * gcc.target/i386/pr70738-6.c: Likewise. * gcc.target/i386/pr70738-7.c: Likewise. * gcc.target/i386/pr70738-8.c: Likewise. * gcc.target/i386/pr70738-9.c: Likewise. Removed: trunk/gcc/testsuite/gcc.target/i386/pr70738-1.c trunk/gcc/testsuite/gcc.target/i386/pr70738-2.c trunk/gcc/testsuite/gcc.target/i386/pr70738-3.c trunk/gcc/testsuite/gcc.target/i386/pr70738-4.c trunk/gcc/testsuite/gcc.target/i386/pr70738-5.c trunk/gcc/testsuite/gcc.target/i386/pr70738-6.c trunk/gcc/testsuite/gcc.target/i386/pr70738-7.c trunk/gcc/testsuite/gcc.target/i386/pr70738-8.c trunk/gcc/testsuite/gcc.target/i386/pr70738-9.c Modified: trunk/gcc/ChangeLog trunk/gcc/common/config/i386/i386-common.c trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.opt trunk/gcc/doc/invoke.texi trunk/gcc/testsuite/ChangeLog
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Author: uros Date: Wed May 25 18:58:49 2016 New Revision: 236738 URL: https://gcc.gnu.org/viewcvs?rev=236738&root=gcc&view=rev Log: PR target/70738 * common/config/i386/i386-common.c (OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET): New. (ix86_handle_option) <case OPT_mgeneral_regs_only>: Disable MPX, MMX, SSE and x87 instructions for -mgeneral-regs-only. * config/i386/i386.opt (ix86_target_flags): Add new Variable. (-mgeneral-regs-only): Add new option. * config/i386/i386.c (ix86_option_override_internal): Don't enable x87 instructions if only general registers are allowed. (ix86_target_string): Add ix86_flags argument. Handle additional flags options through ix86_flags argument. Update all callers. * doc/invoke.texi: Document -mgeneral-regs-only. testsuite/ChangeLog: PR target/70738 * gcc.target/i386/pr70738-1.c: New test. * gcc.target/i386/pr70738-2.c: Likewise. * gcc.target/i386/pr70738-3.c: Likewise. * gcc.target/i386/pr70738-4.c: Likewise. * gcc.target/i386/pr70738-5.c: Likewise. * gcc.target/i386/pr70738-6.c: Likewise. * gcc.target/i386/pr70738-7.c: Likewise. * gcc.target/i386/pr70738-8.c: Likewise. * gcc.target/i386/pr70738-9.c: Likewise. Added: trunk/gcc/testsuite/gcc.target/i386/pr70738-1.c trunk/gcc/testsuite/gcc.target/i386/pr70738-2.c trunk/gcc/testsuite/gcc.target/i386/pr70738-3.c trunk/gcc/testsuite/gcc.target/i386/pr70738-4.c trunk/gcc/testsuite/gcc.target/i386/pr70738-5.c trunk/gcc/testsuite/gcc.target/i386/pr70738-6.c trunk/gcc/testsuite/gcc.target/i386/pr70738-7.c trunk/gcc/testsuite/gcc.target/i386/pr70738-8.c trunk/gcc/testsuite/gcc.target/i386/pr70738-9.c Modified: trunk/gcc/ChangeLog trunk/gcc/common/config/i386/i386-common.c trunk/gcc/config/i386/i386.c trunk/gcc/config/i386/i386.opt trunk/gcc/doc/invoke.texi trunk/gcc/testsuite/ChangeLog
Reimplemented again in 7.0. Fixed.
*** Bug 40236 has been marked as a duplicate of this bug. ***