diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/gen/386.rules')
| -rw-r--r-- | src/cmd/compile/internal/ssa/gen/386.rules | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/ssa/gen/386.rules b/src/cmd/compile/internal/ssa/gen/386.rules index b360189e43..0609d3b24a 100644 --- a/src/cmd/compile/internal/ssa/gen/386.rules +++ b/src/cmd/compile/internal/ssa/gen/386.rules @@ -70,8 +70,10 @@ (Neg32 x) -> (NEGL x) (Neg16 x) -> (NEGL x) (Neg8 x) -> (NEGL x) -(Neg32F x) -> (PXOR x (MOVSSconst <config.Frontend().TypeFloat32()> [f2i(math.Copysign(0, -1))])) -(Neg64F x) -> (PXOR x (MOVSDconst <config.Frontend().TypeFloat64()> [f2i(math.Copysign(0, -1))])) +(Neg32F x) && !config.use387 -> (PXOR x (MOVSSconst <config.Frontend().TypeFloat32()> [f2i(math.Copysign(0, -1))])) +(Neg64F x) && !config.use387 -> (PXOR x (MOVSDconst <config.Frontend().TypeFloat64()> [f2i(math.Copysign(0, -1))])) +(Neg32F x) && config.use387 -> (FCHS x) +(Neg64F x) && config.use387 -> (FCHS x) (Com32 x) -> (NOTL x) (Com16 x) -> (NOTL x) @@ -1250,3 +1252,8 @@ && x.Uses == 1 && clobber(x) -> (MOVLstoreidx1 [i-2] {s} p (SHLLconst <idx.Type> [1] idx) w0 mem) + +// For PIC, break floating-point constant loading into two instructions so we have +// a register to use for holding the address of the constant pool entry. +(MOVSSconst [c]) && config.ctxt.Flag_shared -> (MOVSSconst2 (MOVSSconst1 [c])) +(MOVSDconst [c]) && config.ctxt.Flag_shared -> (MOVSDconst2 (MOVSDconst1 [c])) |