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[dev.ssa] cmd/compile: tidy up register setup

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No functional changes.
The intent is just to make this
easier to read and maintain.

Change-Id: Iec207546482cd62bcb22eaae8efe5be6c4f15378
Reviewed-on: https://go-review.googlesource.com/13284
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2015-08-06 09:34:54 -07:00
parent 5584523224
commit cd0cb0a9d6
1 changed files with 36 additions and 21 deletions
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57
src/cmd/compile/internal/ssa/gen/AMD64Ops.go
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@ -70,25 +70,40 @@ func init() {
return m
}
gp := buildReg("AX CX DX BX BP SI DI R8 R9 R10 R11 R12 R13 R14 R15")
gpsp := gp | buildReg("SP")
gpspsb := gpsp | buildReg("SB")
flags := buildReg("FLAGS")
gp01 := regInfo{[]regMask{}, 0, []regMask{gp}}
gp11 := regInfo{[]regMask{gpsp}, 0, []regMask{gp}}
gp11sb := regInfo{[]regMask{gpspsb}, 0, []regMask{gp}}
gp21 := regInfo{[]regMask{gpsp, gpsp}, 0, []regMask{gp}}
gp21sb := regInfo{[]regMask{gpspsb, gpsp}, 0, []regMask{gp}}
gp21shift := regInfo{[]regMask{gpsp, buildReg("CX")}, 0, []regMask{gp}}
gp2flags := regInfo{[]regMask{gpsp, gpsp}, 0, []regMask{flags}}
gp1flags := regInfo{[]regMask{gpsp}, 0, []regMask{flags}}
flagsgp1 := regInfo{[]regMask{flags}, 0, []regMask{gp}}
gpload := regInfo{[]regMask{gpspsb, 0}, 0, []regMask{gp}}
gploadidx := regInfo{[]regMask{gpspsb, gpsp, 0}, 0, []regMask{gp}}
gpstore := regInfo{[]regMask{gpspsb, gpsp, 0}, 0, nil}
gpstoreconst := regInfo{[]regMask{gpspsb, 0}, 0, nil}
gpstoreidx := regInfo{[]regMask{gpspsb, gpsp, gpsp, 0}, 0, nil}
flagsgp := regInfo{[]regMask{flags}, 0, []regMask{gp}}
// Common individual register masks
var (
gp = buildReg("AX CX DX BX BP SI DI R8 R9 R10 R11 R12 R13 R14 R15")
gpsp = gp | buildReg("SP")
gpspsb = gpsp | buildReg("SB")
flags = buildReg("FLAGS")
)
// Common slices of register masks
var (
gponly = []regMask{gp}
flagsonly = []regMask{flags}
)
// Common regInfo
var (
gp01 = regInfo{inputs: []regMask{}, outputs: gponly}
gp11 = regInfo{inputs: []regMask{gpsp}, outputs: gponly}
gp11sb = regInfo{inputs: []regMask{gpspsb}, outputs: gponly}
gp21 = regInfo{inputs: []regMask{gpsp, gpsp}, outputs: gponly}
gp21sb = regInfo{inputs: []regMask{gpspsb, gpsp}, outputs: gponly}
gp21shift = regInfo{inputs: []regMask{gpsp, buildReg("CX")}, outputs: gponly}
gp2flags = regInfo{inputs: []regMask{gpsp, gpsp}, outputs: flagsonly}
gp1flags = regInfo{inputs: []regMask{gpsp}, outputs: flagsonly}
flagsgp = regInfo{inputs: flagsonly, outputs: gponly}
gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: gponly}
gploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: gponly}
gpstore = regInfo{inputs: []regMask{gpspsb, gpsp, 0}}
gpstoreconst = regInfo{inputs: []regMask{gpspsb, 0}}
gpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, gpsp, 0}}
)
// Suffixes encode the bit width of various instructions.
// Q = 64 bit, L = 32 bit, W = 16 bit, B = 8 bit
@ -205,8 +220,8 @@ func init() {
{name: "NOTW", reg: gp11, asm: "NOTW"}, // ^arg0
{name: "NOTB", reg: gp11, asm: "NOTB"}, // ^arg0
{name: "SBBQcarrymask", reg: flagsgp1, asm: "SBBQ"}, // (int64)(-1) if carry is set, 0 if carry is clear.
{name: "SBBLcarrymask", reg: flagsgp1, asm: "SBBL"}, // (int32)(-1) if carry is set, 0 if carry is clear.
{name: "SBBQcarrymask", reg: flagsgp, asm: "SBBQ"}, // (int64)(-1) if carry is set, 0 if carry is clear.
{name: "SBBLcarrymask", reg: flagsgp, asm: "SBBL"}, // (int32)(-1) if carry is set, 0 if carry is clear.
// Note: SBBW and SBBB are subsumed by SBBL
{name: "SETEQ", reg: flagsgp, asm: "SETEQ"}, // extract == condition from arg0