/* semCALib.s - i80x86 internal VxWorks counting semaphore assembly library *//* Copyright 1984-2002 Wind River Systems, Inc. *//*modification history--------------------01f,20mar02,hdn  preserved previous state of the int enable bit (spr 74016)01e,09nov01,pcm  added VxWorks semaphore events01d,22aug01,hdn  added FUNC/FUNC_LABEL, replaced .align with .balign01c,29jul96,sbs  Made windview conditionally compile.01b,08aug94,hdn  added support for WindView.01a,02jun93,hdn  extracted from semALib.s.*//*DESCRIPTIONThis module contains internals to the VxWorks kernel.These routines have been coded in assembler because they are optimized forperformance.*/#define _ASMLANGUAGE#include "vxWorks.h"#include "asm.h"#include "private/taskLibP.h"#include "private/semLibP.h"	.data	.globl	FUNC(copyright_wind_river)	.long	FUNC(copyright_wind_river)#ifndef PORTABLE	/* externals */	.globl	FUNC(semIntRestrict)	.globl	FUNC(semInvalid)	.globl	FUNC(semQGet)	.globl	FUNC(semQPut)	.globl	FUNC(semEvRsrcSend)	/* internals */	.globl	GTEXT(semCGive)		/* optimized counting semaphore give */	.globl	GTEXT(semCTake)		/* optimized counting semaphore take */	.text	.balign 16/********************************************************************************* semIsInvalid - unlock interrupts and call semInvalid ().*/semIsInvalidUnlock:	popfl				/* UNLOCK INTERRUPTS */semIsInvalid:	jmp	FUNC(semInvalid)	/* let C rtn do work and ret *//********************************************************************************* semCGive - optimized give of a counting semaphore** STATUS semCGive*    (*    SEM_ID semId		/@ semaphore id to give @/*    )* INTERNAL* assumptions are:*  - %ecx = semId*  - %eax = 0*/	.balign 16,0x90FUNC_LABEL(semCGive)	pushfl				/* save IF in EFLAGS */	cli				/* LOCK INTERRUPTS */	cmpl	$FUNC(semClass),(%ecx)	/* check validity */#ifdef	WV_INSTRUMENTATION        je	objOkCGive		/* object is okay */	/* windview - check the validity of instrumented class */        cmpl    $FUNC(semInstClass),(%ecx) /* check validity */        jne     semIsInvalidUnlock      /* invalid semaphore */objOkCGive:#else        jne     semIsInvalidUnlock      /* invalid semaphore */#endif  /* WV_INSTRUMENTATION */	movl	SEM_Q_HEAD(%ecx),%edx	/* test semaphore queue head */	testl	%edx, %edx		/* is the sem empty? */	jne	FUNC(semQGet)		/* if not empty, get from q */	incl	SEM_STATE(%ecx)		/* increment count */	cmpl	SEM_EVENTS_TASKID (%ecx), %edx /* %edx is 0 here */	jnz	FUNC(semEvRsrcSend)	/* Event Code */	popfl				/* UNLOCK INTERRUPTS */	ret				/* return OK *//********************************************************************************* semCTake - optimized take of a counting semaphore** STATUS semCTake (semId)*    (*    SEM_ID semId,		/@ semaphore id to give @/*    int  timeout		/@ timeout in ticks @/*    )* INTERNAL* assumptions are:*  - %ecx = semId*/	.balign 16,0x90FUNC_LABEL(semCTake)	cmpl	$0, FUNC(intCnt)	/* is it in ISR? */	jne	FUNC(semIntRestrict)	/*   yes: let C do the work */	pushfl				/* save IF in EFLAGS */	cli				/* LOCK INTERRUPTS */	cmpl	$FUNC(semClass),(%ecx)	/* check validity */#ifdef	WV_INSTRUMENTATION        je	objOkCTake		/* object is okay */	/* windview - check the validity of instrumented class */        cmpl    $FUNC(semInstClass),(%ecx) /* check validity */        jne     semIsInvalidUnlock      /* invalid semaphore */objOkCTake:#else        jne     semIsInvalidUnlock      /* invalid semaphore */#endif  /* WV_INSTRUMENTATION */	cmpl	$0,SEM_STATE(%ecx)	/* test count */	je	FUNC(semQPut)		/* if sem is owned we block */	decl	SEM_STATE(%ecx)		/* decrement count */	popfl				/* UNLOCK INTERRUPTS */	xorl	%eax,%eax		/* return OK */	ret#endif	/* !PORTABLE */