On 02/21/2017 02:23 PM, Jakub Jelinek wrote:
Hi!
As reported by Uros, the
fld a
fld b
fxchg %st(1)
optimization to
fld b
fld a
misses several important cases, one is FLOAT_EXTEND memory loads where
the memory is SFmode or DFmode but we extend it to a wider mode, and
the other is when we load a k
On Tue, Feb 21, 2017 at 10:23:47PM +0100, Jakub Jelinek wrote:
> As reported by Uros, the
> fld a
> fld b
> fxchg %st(1)
> optimization to
> fld b
> fld a
> misses several important cases, one is FLOAT_EXTEND memory loads where
> the memory is SFmode or DFmode but we extend it to a wider mode, and
Hi!
As reported by Uros, the
fld a
fld b
fxchg %st(1)
optimization to
fld b
fld a
misses several important cases, one is FLOAT_EXTEND memory loads where
the memory is SFmode or DFmode but we extend it to a wider mode, and
the other is when we load a known i?87 constant like 0.0, 1.0, PI etc.
Boot
