Displaying 4 results from an estimated 4 matches for "min_sint_n".
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max_sint_n
2015 Jan 14
5
[LLVMdev] [RFC] Integer Saturation Intrinsics
...a new family of intrinsics, for
integer saturation: @llvm.usat, and @llvm.ssat (unsigned/signed).
Quoting the added documentation:
%r = call i32 @llvm.ssat.i32(i32 %x, i32 %n)
is equivalent to the expression min(max(x, -2^(n-1)), 2^(n-1)-1), itself
implementable as the following IR:
%min_sint_n = i32 ... ; the min. signed integer of bitwidth n, -2^(n-1)
%max_sint_n = i32 ... ; the max. signed integer of bitwidth n, 2^(n-1)-1
%0 = icmp slt i32 %x, %min_sint_n
%1 = select i1 %0, i32 %min_sint_n, i32 %x
%2 = icmp sgt i32 %1, %max_sint_n
%r = select i1 %2, i32 %m...
2015 Jan 15
2
[LLVMdev] [RFC] Integer Saturation Intrinsics
...vm.ssat (unsigned/signed).
>> Quoting the added documentation:
>>
>> %r = call i32 @llvm.ssat.i32(i32 %x, i32 %n)
>>
>> is equivalent to the expression min(max(x, -2^(n-1)), 2^(n-1)-1), itself
>> implementable as the following IR:
>>
>> %min_sint_n = i32 ... ; the min. signed integer of bitwidth n,
>> -2^(n-1)
>> %max_sint_n = i32 ... ; the max. signed integer of bitwidth n,
>> 2^(n-1)-1
>> %0 = icmp slt i32 %x, %min_sint_n
>> %1 = select i1 %0, i32 %min_sint_n, i32 %x
>> %2 = ic...
2015 Jan 15
3
[LLVMdev] [RFC] Integer Saturation Intrinsics
...sat (unsigned/signed).
> > Quoting the added documentation:
> >
> > %r = call i32 @llvm.ssat.i32(i32 %x, i32 %n)
> >
> > is equivalent to the expression min(max(x, -2^(n-1)), 2^(n-1)-1), itself
> > implementable as the following IR:
> >
> > %min_sint_n = i32 ... ; the min. signed integer of bitwidth n,
> -2^(n-1)
> > %max_sint_n = i32 ... ; the max. signed integer of bitwidth n,
> 2^(n-1)-1
> > %0 = icmp slt i32 %x, %min_sint_n
> > %1 = select i1 %0, i32 %min_sint_n, i32 %x
> > %2 = icmp sgt i32 %...
2015 Jan 15
0
[LLVMdev] [RFC] Integer Saturation Intrinsics
...;> Quoting the added documentation:
>>>
>>> %r = call i32 @llvm.ssat.i32(i32 %x, i32 %n)
>>>
>>> is equivalent to the expression min(max(x, -2^(n-1)), 2^(n-1)-1), itself
>>> implementable as the following IR:
>>>
>>> %min_sint_n = i32 ... ; the min. signed integer of bitwidth n,
>>> -2^(n-1)
>>> %max_sint_n = i32 ... ; the max. signed integer of bitwidth n,
>>> 2^(n-1)-1
>>> %0 = icmp slt i32 %x, %min_sint_n
>>> %1 = select i1 %0, i32 %min_sint_n, i32 %x...