summaryrefslogblamecommitdiff
path: root/src/fenv/x86_64/fenv.s
blob: 11aa3da2fa4fc55717a8ec21c64411f1d60ee59f (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13












                        
                             







                      
                             








                      
                          
           
                 
                     

                     
                          

                      
                      
                  
                          
                      
                      
                


                  
                          




                      
                       


                
                        






                        
                        

















                        
                            







                      
2:	not %edi
	sub $32,%rsp
	fnstenv (%rsp)
	and %edi,4(%rsp)
	or %esi,4(%rsp)
	fldenv (%rsp)
	stmxcsr (%rsp)
	and %edi,(%rsp)
	ldmxcsr (%rsp)
	add $32,%rsp
	ret

.global feclearexcept
.type feclearexcept,@function
feclearexcept:	
	xor %eax,%eax
	xor %esi,%esi
	test %edi,%edi
	jnz 2b
	ret

.global feraiseexcept
.type feraiseexcept,@function
feraiseexcept:	
	xor %eax,%eax
	mov %edi,%esi
	xor %edi,%edi
	test %esi,%esi
	jnz 2b
	ret

.global fesetround
.type fesetround,@function
fesetround:
	push %rax
	xor %eax,%eax
	mov %edi,%ecx
	fnstcw (%rsp)
	andb $0xf3,1(%rsp)
	or %ch,1(%rsp)
	fldcw (%rsp)
	stmxcsr (%rsp)
	shl $3,%ch
	andb $0x9f,1(%rsp)
	or %ch,1(%rsp)
	ldmxcsr (%rsp)
	pop %rcx
	ret

.global fegetround
.type fegetround,@function
fegetround:
	push %rax
	stmxcsr (%rsp)
	pop %rax
	shr $3,%eax
	and $0xc00,%eax
	ret

.global fegetenv
.type fegetenv,@function
fegetenv:
	xor %eax,%eax
	fnstenv (%rdi)
	stmxcsr 28(%rdi)
	ret

.global fesetenv
.type fesetenv,@function
fesetenv:
	xor %eax,%eax
	inc %rdi
	jz 1f
	fldenv -1(%rdi)
	ldmxcsr 27(%rdi)
	ret
1:	push %rax
	push %rax
	push %rax
	pushq $0x37f
	fldenv (%rsp)
	pushq $0x1f80
	ldmxcsr (%rsp)
	add $40,%rsp
	ret

.global fetestexcept
.type fetestexcept,@function
fetestexcept:
	push %rax
	stmxcsr (%rsp)
	pop %rsi
	fnstsw %ax
	or %esi,%eax
	and %edi,%eax
	ret