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x86inc: Make cpuflag() and notcpuflag() return 0 or 1 

Makes it possible to use them in arithmetic expressions.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Henrik Gramner 2016-01-18 00:21:44 +01:00 committed by Anton Khirnov
parent d336bfcf69
commit 7adcd4e841
1 changed files with 3 additions and 2 deletions
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5
libavutil/x86/x86inc.asm
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@ -773,8 +773,9 @@ BRANCH_INSTR jz, je, jnz, jne, jl, jle, jnl, jnle, jg, jge, jng, jnge, ja, jae,
%assign cpuflags_bmi1 (1<<22)|cpuflags_lzcnt
%assign cpuflags_bmi2 (1<<23)|cpuflags_bmi1
%define cpuflag(x) ((cpuflags & (cpuflags_ %+ x)) == (cpuflags_ %+ x))
%define notcpuflag(x) ((cpuflags & (cpuflags_ %+ x)) != (cpuflags_ %+ x))
; Returns a boolean value expressing whether or not the specified cpuflag is enabled.
%define cpuflag(x) (((((cpuflags & (cpuflags_ %+ x)) ^ (cpuflags_ %+ x)) - 1) >> 31) & 1)
%define notcpuflag(x) (cpuflag(x) ^ 1)
; Takes an arbitrary number of cpuflags from the above list.
; All subsequent functions (up to the next INIT_CPUFLAGS) is built for the specified cpu.