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MIPS: Hardcode cpu_has_fpu=0 when CONFIG_MIPS_FP_SUPPORT=n 

When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point, so
there's no point in detecting presence of an FPU. Hardcode
cpu_has_fpu=0 such that we optimize out code that makes use of the FPU.

Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21005/
Cc: linux-mips@linux-mips.org
This commit is contained in:
Paul Burton 2018-11-07 23:14:03 +00:00
parent c92e47e585
commit b372e83b67
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1 changed files with 8 additions and 3 deletions
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11
arch/mips/include/asm/cpu-features.h
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@ -115,10 +115,15 @@
#endif
/* Don't override `cpu_has_fpu' to 1 or the "nofpu" option won't work. */
#ifndef cpu_has_fpu
#define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
#define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
# ifdef CONFIG_MIPS_FP_SUPPORT
# define cpu_has_fpu (current_cpu_data.options & MIPS_CPU_FPU)
# define raw_cpu_has_fpu (raw_current_cpu_data.options & MIPS_CPU_FPU)
# else
# define cpu_has_fpu 0
# define raw_cpu_has_fpu 0
# endif
#else
#define raw_cpu_has_fpu cpu_has_fpu
# define raw_cpu_has_fpu cpu_has_fpu
#endif
#ifndef cpu_has_32fpr
#define cpu_has_32fpr __isa_ge_or_opt(1, MIPS_CPU_32FPR)