mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-12-01 07:51:07 +00:00
c3f5581b0a
Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
95 lines
1.2 KiB
ArmAsm
95 lines
1.2 KiB
ArmAsm
//
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// sys_dosa.s
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// x86 assembly-language DOS-dependent routines.
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#include "asm_i386.h"
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#include "quakeasm.h"
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.data
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.align 4
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fpenv:
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.long 0, 0, 0, 0, 0, 0, 0, 0
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.text
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.globl C(MaskExceptions)
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C(MaskExceptions):
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fnstenv fpenv
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orl $0x3F,fpenv
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fldenv fpenv
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ret
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#if 0
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.globl C(unmaskexceptions)
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C(unmaskexceptions):
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fnstenv fpenv
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andl $0xFFFFFFE0,fpenv
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fldenv fpenv
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ret
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#endif
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.data
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.align 4
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.globl ceil_cw, single_cw, full_cw, cw, pushed_cw
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ceil_cw: .long 0
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single_cw: .long 0
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full_cw: .long 0
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cw: .long 0
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pushed_cw: .long 0
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.text
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.globl C(Sys_LowFPPrecision)
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C(Sys_LowFPPrecision):
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fldcw single_cw
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ret
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.globl C(Sys_HighFPPrecision)
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C(Sys_HighFPPrecision):
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fldcw full_cw
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ret
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.globl C(Sys_PushFPCW_SetHigh)
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C(Sys_PushFPCW_SetHigh):
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fnstcw pushed_cw
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fldcw full_cw
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ret
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.globl C(Sys_PopFPCW)
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C(Sys_PopFPCW):
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fldcw pushed_cw
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ret
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.globl C(Sys_SetFPCW)
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C(Sys_SetFPCW):
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fnstcw cw
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movl cw,%eax
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#if id386
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andb $0xF0,%ah
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orb $0x03,%ah // round mode, 64-bit precision
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#endif
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movl %eax,full_cw
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#if id386
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andb $0xF0,%ah
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orb $0x0C,%ah // chop mode, single precision
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#endif
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movl %eax,single_cw
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#if id386
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andb $0xF0,%ah
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orb $0x08,%ah // ceil mode, single precision
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#endif
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movl %eax,ceil_cw
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ret
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