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.global feclearexcept
.type feclearexcept,@function
feclearexcept:
# maintain exceptions in the sse mxcsr, clear x87 exceptions
mov %edi,%ecx
and $0x3f,%ecx
fnstsw %ax
test %eax,%ecx
jz 1f
fnclex
1: stmxcsr -8(%rsp)
and $0x3f,%eax
or %eax,-8(%rsp)
test %ecx,-8(%rsp)
jz 1f
not %ecx
and %ecx,-8(%rsp)
ldmxcsr -8(%rsp)
1: xor %eax,%eax
ret
.global feraiseexcept
.type feraiseexcept,@function
feraiseexcept:
and $0x3f,%edi
stmxcsr -8(%rsp)
or %edi,-8(%rsp)
ldmxcsr -8(%rsp)
xor %eax,%eax
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
pushq $0xffff
pushq $0x37f
fldenv (%rsp)
pushq $0x1f80
ldmxcsr (%rsp)
add $40,%rsp
ret
.global fetestexcept
.type fetestexcept,@function
fetestexcept:
and $0x3f,%edi
push %rax
stmxcsr (%rsp)
pop %rsi
fnstsw %ax
or %esi,%eax
and %edi,%eax
ret
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