131 lines
4.4 KiB
Factor
131 lines
4.4 KiB
Factor
USING: accessors alien.c-types alien.syntax arrays assocs
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biassocs classes.struct combinators cpu.x86.features kernel
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literals math math.bitwise math.floats.env
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math.floats.env.private system ;
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IN: math.floats.env.x86
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STRUCT: sse-env
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{ mxcsr uint } ;
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STRUCT: x87-env
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{ status ushort }
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{ control ushort } ;
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! defined in the vm, cpu-x86*.S
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FUNCTION: void get_sse_env ( sse-env* env ) ;
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FUNCTION: void set_sse_env ( sse-env* env ) ;
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FUNCTION: void get_x87_env ( x87-env* env ) ;
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FUNCTION: void set_x87_env ( x87-env* env ) ;
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: <sse-env> ( -- sse-env )
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sse-env (struct) [ get_sse_env ] keep ;
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M: sse-env (set-fp-env-register)
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set_sse_env ;
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: <x87-env> ( -- x87-env )
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x87-env (struct) [ get_x87_env ] keep ;
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M: x87-env (set-fp-env-register)
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set_x87_env ;
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M: x86 (fp-env-registers)
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sse2? [ <sse-env> <x87-env> 2array ] [ <x87-env> 1array ] if ;
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CONSTANT: sse-exception-flag-bits HEX: 3f
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CONSTANT: sse-exception-flag>bit
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H{
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{ +fp-invalid-operation+ HEX: 01 }
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{ +fp-overflow+ HEX: 08 }
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{ +fp-underflow+ HEX: 10 }
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{ +fp-zero-divide+ HEX: 04 }
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{ +fp-inexact+ HEX: 20 }
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}
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CONSTANT: sse-fp-traps-bits HEX: 1f80
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CONSTANT: sse-fp-traps>bit
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H{
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{ +fp-invalid-operation+ HEX: 0080 }
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{ +fp-overflow+ HEX: 0400 }
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{ +fp-underflow+ HEX: 0800 }
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{ +fp-zero-divide+ HEX: 0200 }
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{ +fp-inexact+ HEX: 1000 }
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}
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CONSTANT: sse-rounding-mode-bits HEX: 6000
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CONSTANT: sse-rounding-mode>bit
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$[ H{
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{ +round-nearest+ HEX: 0000 }
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{ +round-down+ HEX: 2000 }
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{ +round-up+ HEX: 4000 }
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{ +round-zero+ HEX: 6000 }
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} >biassoc ]
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CONSTANT: sse-denormal-mode-bits HEX: 8040
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M: sse-env (get-exception-flags) ( register -- exceptions )
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mxcsr>> sse-exception-flag>bit mask> ; inline
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M: sse-env (set-exception-flags) ( register exceptions -- register' )
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[ sse-exception-flag>bit >mask sse-exception-flag-bits remask ] curry change-mxcsr ; inline
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M: sse-env (get-fp-traps) ( register -- exceptions )
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mxcsr>> bitnot sse-fp-traps>bit mask> ; inline
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M: sse-env (set-fp-traps) ( register exceptions -- register' )
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[ sse-fp-traps>bit >mask bitnot sse-fp-traps-bits remask ] curry change-mxcsr ; inline
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M: sse-env (get-rounding-mode) ( register -- mode )
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mxcsr>> sse-rounding-mode-bits mask sse-rounding-mode>bit value-at ; inline
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M: sse-env (set-rounding-mode) ( register mode -- register' )
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[ sse-rounding-mode>bit at sse-rounding-mode-bits remask ] curry change-mxcsr ; inline
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M: sse-env (get-denormal-mode) ( register -- mode )
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mxcsr>> sse-denormal-mode-bits mask zero? +denormal-keep+ +denormal-flush+ ? ; inline
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M: sse-env (set-denormal-mode) ( register mode -- register' )
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[
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{
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{ +denormal-keep+ [ sse-denormal-mode-bits unmask ] }
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{ +denormal-flush+ [ sse-denormal-mode-bits bitor ] }
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} case
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] curry change-mxcsr ; inline
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CONSTANT: x87-exception-bits HEX: 3f
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CONSTANT: x87-exception>bit
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H{
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{ +fp-invalid-operation+ HEX: 01 }
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{ +fp-overflow+ HEX: 08 }
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{ +fp-underflow+ HEX: 10 }
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{ +fp-zero-divide+ HEX: 04 }
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{ +fp-inexact+ HEX: 20 }
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}
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CONSTANT: x87-rounding-mode-bits HEX: 0c00
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CONSTANT: x87-rounding-mode>bit
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$[ H{
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{ +round-nearest+ HEX: 0000 }
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{ +round-down+ HEX: 0400 }
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{ +round-up+ HEX: 0800 }
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{ +round-zero+ HEX: 0c00 }
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} >biassoc ]
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M: x87-env (get-exception-flags) ( register -- exceptions )
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status>> x87-exception>bit mask> ; inline
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M: x87-env (set-exception-flags) ( register exceptions -- register' )
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drop ;
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M: x87-env (get-fp-traps) ( register -- exceptions )
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control>> bitnot x87-exception>bit mask> ; inline
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M: x87-env (set-fp-traps) ( register exceptions -- register' )
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[ x87-exception>bit >mask bitnot x87-exception-bits remask ] curry change-control ; inline
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M: x87-env (get-rounding-mode) ( register -- mode )
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control>> x87-rounding-mode-bits mask x87-rounding-mode>bit value-at ; inline
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M: x87-env (set-rounding-mode) ( register mode -- register' )
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[ x87-rounding-mode>bit at x87-rounding-mode-bits remask ] curry change-control ; inline
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M: x87-env (get-denormal-mode) ( register -- mode )
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drop +denormal-keep+ ; inline
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M: x87-env (set-denormal-mode) ( register mode -- register' )
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drop ;
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