mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

cmd/compile: don't reserve X15 for float sub/div any more 

We used to reserve X15 to implement the 3-operand floating-point
sub/div ops with the 2-operand sub/div that 386/amd64 gives us.

Now that resultInArg0 is implemented, we no longer need to
reserve X15 (X7 on 386).

Fixes #15584

Change-Id: I978e6c0a35236e89641bfc027538cede66004e82
Reviewed-on: https://go-review.googlesource.com/28272
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2016-08-31 12:35:32 -07:00
parent 33bb597d85
commit cc0248aea5
3 changed files with 36 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/cmd/compile/internal/ssa/gen/386Ops.go
View File

@ -88,7 +88,6 @@ func init() {
dx = buildReg("DX")
gp = buildReg("AX CX DX BX BP SI DI")
fp = buildReg("X0 X1 X2 X3 X4 X5 X6 X7")
x7 = buildReg("X7")
gpsp = gp | buildReg("SP")
gpspsb = gpsp | buildReg("SB")
callerSave = gp | fp
@ -133,10 +132,8 @@ func init() {
gpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, gpsp, 0}}
gpstoreconstidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}}
fp01 = regInfo{inputs: nil, outputs: fponly}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fp21x7 = regInfo{inputs: []regMask{fp &^ x7, fp &^ x7},
clobbers: x7, outputs: []regMask{fp &^ x7}}
fp01 = regInfo{inputs: nil, outputs: fponly}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fpgp = regInfo{inputs: fponly, outputs: gponly}
gpfp = regInfo{inputs: gponly, outputs: fponly}
fp11 = regInfo{inputs: fponly, outputs: fponly}
@ -153,12 +150,12 @@ func init() {
// fp ops
{name: "ADDSS", argLength: 2, reg: fp21, asm: "ADDSS", commutative: true, resultInArg0: true}, // fp32 add
{name: "ADDSD", argLength: 2, reg: fp21, asm: "ADDSD", commutative: true, resultInArg0: true}, // fp64 add
{name: "SUBSS", argLength: 2, reg: fp21x7, asm: "SUBSS", resultInArg0: true}, // fp32 sub
{name: "SUBSD", argLength: 2, reg: fp21x7, asm: "SUBSD", resultInArg0: true}, // fp64 sub
{name: "SUBSS", argLength: 2, reg: fp21, asm: "SUBSS", resultInArg0: true}, // fp32 sub
{name: "SUBSD", argLength: 2, reg: fp21, asm: "SUBSD", resultInArg0: true}, // fp64 sub
{name: "MULSS", argLength: 2, reg: fp21, asm: "MULSS", commutative: true, resultInArg0: true}, // fp32 mul
{name: "MULSD", argLength: 2, reg: fp21, asm: "MULSD", commutative: true, resultInArg0: true}, // fp64 mul
{name: "DIVSS", argLength: 2, reg: fp21x7, asm: "DIVSS", resultInArg0: true}, // fp32 div
{name: "DIVSD", argLength: 2, reg: fp21x7, asm: "DIVSD", resultInArg0: true}, // fp64 div
{name: "DIVSS", argLength: 2, reg: fp21, asm: "DIVSS", resultInArg0: true}, // fp32 div
{name: "DIVSD", argLength: 2, reg: fp21, asm: "DIVSD", resultInArg0: true}, // fp64 div
{name: "MOVSSload", argLength: 2, reg: fpload, asm: "MOVSS", aux: "SymOff"}, // fp32 load
{name: "MOVSDload", argLength: 2, reg: fpload, asm: "MOVSD", aux: "SymOff"}, // fp64 load

15
src/cmd/compile/internal/ssa/gen/AMD64Ops.go
View File

@ -92,7 +92,6 @@ func init() {
ax = buildReg("AX")
cx = buildReg("CX")
dx = buildReg("DX")
x15 = buildReg("X15")
gp = buildReg("AX CX DX BX BP SI DI R8 R9 R10 R11 R12 R13 R14 R15")
fp = buildReg("X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15")
gpsp = gp | buildReg("SP")
@ -137,10 +136,8 @@ func init() {
gpstorexchg = regInfo{inputs: []regMask{gp, gp, 0}, outputs: []regMask{gp}}
cmpxchg = regInfo{inputs: []regMask{gp, ax, gp, 0}, outputs: []regMask{gp, 0}, clobbers: ax}
fp01 = regInfo{inputs: nil, outputs: fponly}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fp21x15 = regInfo{inputs: []regMask{fp &^ x15, fp &^ x15},
clobbers: x15, outputs: []regMask{fp &^ x15}}
fp01 = regInfo{inputs: nil, outputs: fponly}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fpgp = regInfo{inputs: fponly, outputs: gponly}
gpfp = regInfo{inputs: gponly, outputs: fponly}
fp11 = regInfo{inputs: fponly, outputs: fponly}
@ -157,12 +154,12 @@ func init() {
// fp ops
{name: "ADDSS", argLength: 2, reg: fp21, asm: "ADDSS", commutative: true, resultInArg0: true}, // fp32 add
{name: "ADDSD", argLength: 2, reg: fp21, asm: "ADDSD", commutative: true, resultInArg0: true}, // fp64 add
{name: "SUBSS", argLength: 2, reg: fp21x15, asm: "SUBSS", resultInArg0: true}, // fp32 sub
{name: "SUBSD", argLength: 2, reg: fp21x15, asm: "SUBSD", resultInArg0: true}, // fp64 sub
{name: "SUBSS", argLength: 2, reg: fp21, asm: "SUBSS", resultInArg0: true}, // fp32 sub
{name: "SUBSD", argLength: 2, reg: fp21, asm: "SUBSD", resultInArg0: true}, // fp64 sub
{name: "MULSS", argLength: 2, reg: fp21, asm: "MULSS", commutative: true, resultInArg0: true}, // fp32 mul
{name: "MULSD", argLength: 2, reg: fp21, asm: "MULSD", commutative: true, resultInArg0: true}, // fp64 mul
{name: "DIVSS", argLength: 2, reg: fp21x15, asm: "DIVSS", resultInArg0: true}, // fp32 div
{name: "DIVSD", argLength: 2, reg: fp21x15, asm: "DIVSD", resultInArg0: true}, // fp64 div
{name: "DIVSS", argLength: 2, reg: fp21, asm: "DIVSS", resultInArg0: true}, // fp32 div
{name: "DIVSD", argLength: 2, reg: fp21, asm: "DIVSD", resultInArg0: true}, // fp64 div
{name: "MOVSSload", argLength: 2, reg: fpload, asm: "MOVSS", aux: "SymOff"}, // fp32 load
{name: "MOVSDload", argLength: 2, reg: fpload, asm: "MOVSD", aux: "SymOff"}, // fp64 load

56
src/cmd/compile/internal/ssa/opGen.go
View File

@ -1561,12 +1561,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ASUBSS,
reg: regInfo{
inputs: []inputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{1, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
{1, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
clobbers: 32768, // X7
outputs: []outputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
},
},
@ -1577,12 +1576,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ASUBSD,
reg: regInfo{
inputs: []inputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{1, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
{1, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
clobbers: 32768, // X7
outputs: []outputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
},
},
@ -1625,12 +1623,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ADIVSS,
reg: regInfo{
inputs: []inputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{1, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
{1, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
clobbers: 32768, // X7
outputs: []outputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
},
},
@ -1641,12 +1638,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ADIVSD,
reg: regInfo{
inputs: []inputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{1, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
{1, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
clobbers: 32768, // X7
outputs: []outputInfo{
{0, 32512}, // X0 X1 X2 X3 X4 X5 X6
{0, 65280}, // X0 X1 X2 X3 X4 X5 X6 X7
},
},
},
@ -3954,12 +3950,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ASUBSS,
reg: regInfo{
inputs: []inputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{1, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
{1, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
clobbers: 2147483648, // X15
outputs: []outputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
},
},
@ -3970,12 +3965,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ASUBSD,
reg: regInfo{
inputs: []inputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{1, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
{1, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
clobbers: 2147483648, // X15
outputs: []outputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
},
},
@ -4018,12 +4012,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ADIVSS,
reg: regInfo{
inputs: []inputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{1, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
{1, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
clobbers: 2147483648, // X15
outputs: []outputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
},
},
@ -4034,12 +4027,11 @@ var opcodeTable = [...]opInfo{
asm: x86.ADIVSD,
reg: regInfo{
inputs: []inputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{1, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
{1, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
clobbers: 2147483648, // X15
outputs: []outputInfo{
{0, 2147418112}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14
{0, 4294901760}, // X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15
},
},
},