/
asm0.go
1782 lines (1567 loc) · 42.4 KB
/
asm0.go
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// cmd/9l/optab.c, cmd/9l/asmout.c from Vita Nuova.
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2008 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2008 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package mips
import (
"cmd/internal/obj"
"fmt"
"log"
"sort"
)
// Instruction layout.
const (
FuncAlign = 8
)
const (
r0iszero = 1
)
type Optab struct {
as obj.As
a1 uint8
a2 uint8
a3 uint8
type_ int8
size int8
param int16
}
var optab = []Optab{
{obj.ATEXT, C_LEXT, C_NONE, C_TEXTSIZE, 0, 0, 0},
{obj.ATEXT, C_ADDR, C_NONE, C_TEXTSIZE, 0, 0, 0},
{AMOVW, C_REG, C_NONE, C_REG, 1, 4, 0},
{AMOVV, C_REG, C_NONE, C_REG, 1, 4, 0},
{AMOVB, C_REG, C_NONE, C_REG, 12, 8, 0},
{AMOVBU, C_REG, C_NONE, C_REG, 13, 4, 0},
{AMOVWU, C_REG, C_NONE, C_REG, 14, 8, 0},
{ASUB, C_REG, C_REG, C_REG, 2, 4, 0},
{AADD, C_REG, C_REG, C_REG, 2, 4, 0},
{AAND, C_REG, C_REG, C_REG, 2, 4, 0},
{ASUB, C_REG, C_NONE, C_REG, 2, 4, 0},
{AADD, C_REG, C_NONE, C_REG, 2, 4, 0},
{AAND, C_REG, C_NONE, C_REG, 2, 4, 0},
{ASLL, C_REG, C_NONE, C_REG, 9, 4, 0},
{ASLL, C_REG, C_REG, C_REG, 9, 4, 0},
{AADDF, C_FREG, C_NONE, C_FREG, 32, 4, 0},
{AADDF, C_FREG, C_REG, C_FREG, 32, 4, 0},
{ACMPEQF, C_FREG, C_REG, C_NONE, 32, 4, 0},
{AABSF, C_FREG, C_NONE, C_FREG, 33, 4, 0},
{AMOVF, C_FREG, C_NONE, C_FREG, 33, 4, 0},
{AMOVD, C_FREG, C_NONE, C_FREG, 33, 4, 0},
{AMOVW, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVWU, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVV, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVB, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVBU, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVWL, C_REG, C_NONE, C_SEXT, 7, 4, REGSB},
{AMOVW, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVWU, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVV, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVB, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVBU, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVWL, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{AMOVW, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVWU, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVV, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVB, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVBU, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVWL, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{AMOVW, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVWU, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVV, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVB, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVBU, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVWL, C_SEXT, C_NONE, C_REG, 8, 4, REGSB},
{AMOVW, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVWU, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVV, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVB, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVBU, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVWL, C_SAUTO, C_NONE, C_REG, 8, 4, REGSP},
{AMOVW, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVWU, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVV, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVB, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVBU, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVWL, C_SOREG, C_NONE, C_REG, 8, 4, REGZERO},
{AMOVW, C_REG, C_NONE, C_LEXT, 35, 12, REGSB},
{AMOVWU, C_REG, C_NONE, C_LEXT, 35, 12, REGSB},
{AMOVV, C_REG, C_NONE, C_LEXT, 35, 12, REGSB},
{AMOVB, C_REG, C_NONE, C_LEXT, 35, 12, REGSB},
{AMOVBU, C_REG, C_NONE, C_LEXT, 35, 12, REGSB},
{AMOVW, C_REG, C_NONE, C_LAUTO, 35, 12, REGSP},
{AMOVWU, C_REG, C_NONE, C_LAUTO, 35, 12, REGSP},
{AMOVV, C_REG, C_NONE, C_LAUTO, 35, 12, REGSP},
{AMOVB, C_REG, C_NONE, C_LAUTO, 35, 12, REGSP},
{AMOVBU, C_REG, C_NONE, C_LAUTO, 35, 12, REGSP},
{AMOVW, C_REG, C_NONE, C_LOREG, 35, 12, REGZERO},
{AMOVWU, C_REG, C_NONE, C_LOREG, 35, 12, REGZERO},
{AMOVV, C_REG, C_NONE, C_LOREG, 35, 12, REGZERO},
{AMOVB, C_REG, C_NONE, C_LOREG, 35, 12, REGZERO},
{AMOVBU, C_REG, C_NONE, C_LOREG, 35, 12, REGZERO},
{AMOVW, C_REG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVWU, C_REG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVV, C_REG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVB, C_REG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVBU, C_REG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVW, C_REG, C_NONE, C_TLS, 53, 8, 0},
{AMOVWU, C_REG, C_NONE, C_TLS, 53, 8, 0},
{AMOVV, C_REG, C_NONE, C_TLS, 53, 8, 0},
{AMOVB, C_REG, C_NONE, C_TLS, 53, 8, 0},
{AMOVBU, C_REG, C_NONE, C_TLS, 53, 8, 0},
{AMOVW, C_LEXT, C_NONE, C_REG, 36, 12, REGSB},
{AMOVWU, C_LEXT, C_NONE, C_REG, 36, 12, REGSB},
{AMOVV, C_LEXT, C_NONE, C_REG, 36, 12, REGSB},
{AMOVB, C_LEXT, C_NONE, C_REG, 36, 12, REGSB},
{AMOVBU, C_LEXT, C_NONE, C_REG, 36, 12, REGSB},
{AMOVW, C_LAUTO, C_NONE, C_REG, 36, 12, REGSP},
{AMOVWU, C_LAUTO, C_NONE, C_REG, 36, 12, REGSP},
{AMOVV, C_LAUTO, C_NONE, C_REG, 36, 12, REGSP},
{AMOVB, C_LAUTO, C_NONE, C_REG, 36, 12, REGSP},
{AMOVBU, C_LAUTO, C_NONE, C_REG, 36, 12, REGSP},
{AMOVW, C_LOREG, C_NONE, C_REG, 36, 12, REGZERO},
{AMOVWU, C_LOREG, C_NONE, C_REG, 36, 12, REGZERO},
{AMOVV, C_LOREG, C_NONE, C_REG, 36, 12, REGZERO},
{AMOVB, C_LOREG, C_NONE, C_REG, 36, 12, REGZERO},
{AMOVBU, C_LOREG, C_NONE, C_REG, 36, 12, REGZERO},
{AMOVW, C_ADDR, C_NONE, C_REG, 51, 12, 0},
{AMOVWU, C_ADDR, C_NONE, C_REG, 51, 12, 0},
{AMOVV, C_ADDR, C_NONE, C_REG, 51, 12, 0},
{AMOVB, C_ADDR, C_NONE, C_REG, 51, 12, 0},
{AMOVBU, C_ADDR, C_NONE, C_REG, 51, 12, 0},
{AMOVW, C_TLS, C_NONE, C_REG, 54, 8, 0},
{AMOVWU, C_TLS, C_NONE, C_REG, 54, 8, 0},
{AMOVV, C_TLS, C_NONE, C_REG, 54, 8, 0},
{AMOVB, C_TLS, C_NONE, C_REG, 54, 8, 0},
{AMOVBU, C_TLS, C_NONE, C_REG, 54, 8, 0},
{AMOVW, C_SECON, C_NONE, C_REG, 3, 4, REGSB},
{AMOVV, C_SECON, C_NONE, C_REG, 3, 4, REGSB},
{AMOVW, C_SACON, C_NONE, C_REG, 3, 4, REGSP},
{AMOVV, C_SACON, C_NONE, C_REG, 3, 4, REGSP},
{AMOVW, C_LECON, C_NONE, C_REG, 52, 12, REGSB},
{AMOVV, C_LECON, C_NONE, C_REG, 52, 12, REGSB},
{AMOVW, C_LACON, C_NONE, C_REG, 26, 12, REGSP},
{AMOVV, C_LACON, C_NONE, C_REG, 26, 12, REGSP},
{AMOVW, C_ADDCON, C_NONE, C_REG, 3, 4, REGZERO},
{AMOVV, C_ADDCON, C_NONE, C_REG, 3, 4, REGZERO},
{AMOVW, C_ANDCON, C_NONE, C_REG, 3, 4, REGZERO},
{AMOVV, C_ANDCON, C_NONE, C_REG, 3, 4, REGZERO},
{AMOVW, C_STCON, C_NONE, C_REG, 55, 8, 0},
{AMOVV, C_STCON, C_NONE, C_REG, 55, 8, 0},
{AMOVW, C_UCON, C_NONE, C_REG, 24, 4, 0},
{AMOVV, C_UCON, C_NONE, C_REG, 24, 4, 0},
{AMOVW, C_LCON, C_NONE, C_REG, 19, 8, 0},
{AMOVV, C_LCON, C_NONE, C_REG, 19, 8, 0},
{AMOVW, C_HI, C_NONE, C_REG, 20, 4, 0},
{AMOVV, C_HI, C_NONE, C_REG, 20, 4, 0},
{AMOVW, C_LO, C_NONE, C_REG, 20, 4, 0},
{AMOVV, C_LO, C_NONE, C_REG, 20, 4, 0},
{AMOVW, C_REG, C_NONE, C_HI, 21, 4, 0},
{AMOVV, C_REG, C_NONE, C_HI, 21, 4, 0},
{AMOVW, C_REG, C_NONE, C_LO, 21, 4, 0},
{AMOVV, C_REG, C_NONE, C_LO, 21, 4, 0},
{AMUL, C_REG, C_REG, C_NONE, 22, 4, 0},
{AADD, C_ADD0CON, C_REG, C_REG, 4, 4, 0},
{AADD, C_ADD0CON, C_NONE, C_REG, 4, 4, 0},
{AADD, C_ANDCON, C_REG, C_REG, 10, 8, 0},
{AADD, C_ANDCON, C_NONE, C_REG, 10, 8, 0},
{AAND, C_AND0CON, C_REG, C_REG, 4, 4, 0},
{AAND, C_AND0CON, C_NONE, C_REG, 4, 4, 0},
{AAND, C_ADDCON, C_REG, C_REG, 10, 8, 0},
{AAND, C_ADDCON, C_NONE, C_REG, 10, 8, 0},
{AADD, C_UCON, C_REG, C_REG, 25, 8, 0},
{AADD, C_UCON, C_NONE, C_REG, 25, 8, 0},
{AAND, C_UCON, C_REG, C_REG, 25, 8, 0},
{AAND, C_UCON, C_NONE, C_REG, 25, 8, 0},
{AADD, C_LCON, C_NONE, C_REG, 23, 12, 0},
{AAND, C_LCON, C_NONE, C_REG, 23, 12, 0},
{AADD, C_LCON, C_REG, C_REG, 23, 12, 0},
{AAND, C_LCON, C_REG, C_REG, 23, 12, 0},
{ASLL, C_SCON, C_REG, C_REG, 16, 4, 0},
{ASLL, C_SCON, C_NONE, C_REG, 16, 4, 0},
{ASYSCALL, C_NONE, C_NONE, C_NONE, 5, 4, 0},
{ABEQ, C_REG, C_REG, C_SBRA, 6, 4, 0},
{ABEQ, C_REG, C_NONE, C_SBRA, 6, 4, 0},
{ABLEZ, C_REG, C_NONE, C_SBRA, 6, 4, 0},
{ABFPT, C_NONE, C_NONE, C_SBRA, 6, 8, 0},
{AJMP, C_NONE, C_NONE, C_LBRA, 11, 4, 0},
{AJAL, C_NONE, C_NONE, C_LBRA, 11, 4, 0},
{AJMP, C_NONE, C_NONE, C_ZOREG, 18, 4, REGZERO},
{AJAL, C_NONE, C_NONE, C_ZOREG, 18, 4, REGLINK},
{AMOVW, C_SEXT, C_NONE, C_FREG, 27, 4, REGSB},
{AMOVF, C_SEXT, C_NONE, C_FREG, 27, 4, REGSB},
{AMOVD, C_SEXT, C_NONE, C_FREG, 27, 4, REGSB},
{AMOVW, C_SAUTO, C_NONE, C_FREG, 27, 4, REGSP},
{AMOVF, C_SAUTO, C_NONE, C_FREG, 27, 4, REGSP},
{AMOVD, C_SAUTO, C_NONE, C_FREG, 27, 4, REGSP},
{AMOVW, C_SOREG, C_NONE, C_FREG, 27, 4, REGZERO},
{AMOVF, C_SOREG, C_NONE, C_FREG, 27, 4, REGZERO},
{AMOVD, C_SOREG, C_NONE, C_FREG, 27, 4, REGZERO},
{AMOVW, C_LEXT, C_NONE, C_FREG, 27, 12, REGSB},
{AMOVF, C_LEXT, C_NONE, C_FREG, 27, 12, REGSB},
{AMOVD, C_LEXT, C_NONE, C_FREG, 27, 12, REGSB},
{AMOVW, C_LAUTO, C_NONE, C_FREG, 27, 12, REGSP},
{AMOVF, C_LAUTO, C_NONE, C_FREG, 27, 12, REGSP},
{AMOVD, C_LAUTO, C_NONE, C_FREG, 27, 12, REGSP},
{AMOVW, C_LOREG, C_NONE, C_FREG, 27, 12, REGZERO},
{AMOVF, C_LOREG, C_NONE, C_FREG, 27, 12, REGZERO},
{AMOVD, C_LOREG, C_NONE, C_FREG, 27, 12, REGZERO},
{AMOVF, C_ADDR, C_NONE, C_FREG, 51, 12, 0},
{AMOVD, C_ADDR, C_NONE, C_FREG, 51, 12, 0},
{AMOVW, C_FREG, C_NONE, C_SEXT, 28, 4, REGSB},
{AMOVF, C_FREG, C_NONE, C_SEXT, 28, 4, REGSB},
{AMOVD, C_FREG, C_NONE, C_SEXT, 28, 4, REGSB},
{AMOVW, C_FREG, C_NONE, C_SAUTO, 28, 4, REGSP},
{AMOVF, C_FREG, C_NONE, C_SAUTO, 28, 4, REGSP},
{AMOVD, C_FREG, C_NONE, C_SAUTO, 28, 4, REGSP},
{AMOVW, C_FREG, C_NONE, C_SOREG, 28, 4, REGZERO},
{AMOVF, C_FREG, C_NONE, C_SOREG, 28, 4, REGZERO},
{AMOVD, C_FREG, C_NONE, C_SOREG, 28, 4, REGZERO},
{AMOVW, C_FREG, C_NONE, C_LEXT, 28, 12, REGSB},
{AMOVF, C_FREG, C_NONE, C_LEXT, 28, 12, REGSB},
{AMOVD, C_FREG, C_NONE, C_LEXT, 28, 12, REGSB},
{AMOVW, C_FREG, C_NONE, C_LAUTO, 28, 12, REGSP},
{AMOVF, C_FREG, C_NONE, C_LAUTO, 28, 12, REGSP},
{AMOVD, C_FREG, C_NONE, C_LAUTO, 28, 12, REGSP},
{AMOVW, C_FREG, C_NONE, C_LOREG, 28, 12, REGZERO},
{AMOVF, C_FREG, C_NONE, C_LOREG, 28, 12, REGZERO},
{AMOVD, C_FREG, C_NONE, C_LOREG, 28, 12, REGZERO},
{AMOVF, C_FREG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVD, C_FREG, C_NONE, C_ADDR, 50, 12, 0},
{AMOVW, C_REG, C_NONE, C_FREG, 30, 4, 0},
{AMOVW, C_FREG, C_NONE, C_REG, 31, 4, 0},
{AMOVV, C_REG, C_NONE, C_FREG, 47, 4, 0},
{AMOVV, C_FREG, C_NONE, C_REG, 48, 4, 0},
{AMOVW, C_ADDCON, C_NONE, C_FREG, 34, 8, 0},
{AMOVW, C_ANDCON, C_NONE, C_FREG, 34, 8, 0},
{AMOVW, C_REG, C_NONE, C_MREG, 37, 4, 0},
{AMOVV, C_REG, C_NONE, C_MREG, 37, 4, 0},
{AMOVW, C_MREG, C_NONE, C_REG, 38, 4, 0},
{AMOVV, C_MREG, C_NONE, C_REG, 38, 4, 0},
{AWORD, C_LCON, C_NONE, C_NONE, 40, 4, 0},
{AMOVW, C_REG, C_NONE, C_FCREG, 41, 8, 0},
{AMOVV, C_REG, C_NONE, C_FCREG, 41, 8, 0},
{AMOVW, C_FCREG, C_NONE, C_REG, 42, 4, 0},
{AMOVV, C_FCREG, C_NONE, C_REG, 42, 4, 0},
{ABREAK, C_REG, C_NONE, C_SEXT, 7, 4, REGSB}, /* really CACHE instruction */
{ABREAK, C_REG, C_NONE, C_SAUTO, 7, 4, REGSP},
{ABREAK, C_REG, C_NONE, C_SOREG, 7, 4, REGZERO},
{ABREAK, C_NONE, C_NONE, C_NONE, 5, 4, 0},
{obj.AUNDEF, C_NONE, C_NONE, C_NONE, 49, 4, 0},
{obj.AUSEFIELD, C_ADDR, C_NONE, C_NONE, 0, 0, 0},
{obj.APCDATA, C_LCON, C_NONE, C_LCON, 0, 0, 0},
{obj.AFUNCDATA, C_SCON, C_NONE, C_ADDR, 0, 0, 0},
{obj.ANOP, C_NONE, C_NONE, C_NONE, 0, 0, 0},
{obj.ADUFFZERO, C_NONE, C_NONE, C_LBRA, 11, 4, 0}, // same as AJMP
{obj.ADUFFCOPY, C_NONE, C_NONE, C_LBRA, 11, 4, 0}, // same as AJMP
{obj.AXXX, C_NONE, C_NONE, C_NONE, 0, 4, 0},
}
var oprange [ALAST & obj.AMask][]Optab
var xcmp [C_NCLASS][C_NCLASS]bool
func span0(ctxt *obj.Link, cursym *obj.LSym) {
p := cursym.Text
if p == nil || p.Link == nil { // handle external functions and ELF section symbols
return
}
ctxt.Cursym = cursym
ctxt.Autosize = int32(p.To.Offset + 8)
if oprange[AOR&obj.AMask] == nil {
buildop(ctxt)
}
c := int64(0)
p.Pc = c
var m int
var o *Optab
for p = p.Link; p != nil; p = p.Link {
ctxt.Curp = p
p.Pc = c
o = oplook(ctxt, p)
m = int(o.size)
if m == 0 {
if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA && p.As != obj.AUSEFIELD {
ctxt.Diag("zero-width instruction\n%v", p)
}
continue
}
c += int64(m)
}
cursym.Size = c
/*
* if any procedure is large enough to
* generate a large SBRA branch, then
* generate extra passes putting branches
* around jmps to fix. this is rare.
*/
bflag := 1
var otxt int64
var q *obj.Prog
for bflag != 0 {
if ctxt.Debugvlog != 0 {
fmt.Fprintf(ctxt.Bso, "%5.2f span1\n", obj.Cputime())
}
bflag = 0
c = 0
for p = cursym.Text.Link; p != nil; p = p.Link {
p.Pc = c
o = oplook(ctxt, p)
// very large conditional branches
if o.type_ == 6 && p.Pcond != nil {
otxt = p.Pcond.Pc - c
if otxt < -(1<<17)+10 || otxt >= (1<<17)-10 {
q = ctxt.NewProg()
q.Link = p.Link
p.Link = q
q.As = AJMP
q.Lineno = p.Lineno
q.To.Type = obj.TYPE_BRANCH
q.Pcond = p.Pcond
p.Pcond = q
q = ctxt.NewProg()
q.Link = p.Link
p.Link = q
q.As = AJMP
q.Lineno = p.Lineno
q.To.Type = obj.TYPE_BRANCH
q.Pcond = q.Link.Link
addnop(ctxt, p.Link)
addnop(ctxt, p)
bflag = 1
}
}
m = int(o.size)
if m == 0 {
if p.As != obj.ANOP && p.As != obj.AFUNCDATA && p.As != obj.APCDATA && p.As != obj.AUSEFIELD {
ctxt.Diag("zero-width instruction\n%v", p)
}
continue
}
c += int64(m)
}
cursym.Size = c
}
c += -c & (FuncAlign - 1)
cursym.Size = c
/*
* lay out the code, emitting code and data relocations.
*/
cursym.Grow(cursym.Size)
bp := cursym.P
var i int32
var out [4]uint32
for p := cursym.Text.Link; p != nil; p = p.Link {
ctxt.Pc = p.Pc
ctxt.Curp = p
o = oplook(ctxt, p)
if int(o.size) > 4*len(out) {
log.Fatalf("out array in span0 is too small, need at least %d for %v", o.size/4, p)
}
asmout(ctxt, p, o, out[:])
for i = 0; i < int32(o.size/4); i++ {
ctxt.Arch.ByteOrder.PutUint32(bp, out[i])
bp = bp[4:]
}
}
}
func isint32(v int64) bool {
return int64(int32(v)) == v
}
func isuint32(v uint64) bool {
return uint64(uint32(v)) == v
}
func aclass(ctxt *obj.Link, a *obj.Addr) int {
switch a.Type {
case obj.TYPE_NONE:
return C_NONE
case obj.TYPE_REG:
if REG_R0 <= a.Reg && a.Reg <= REG_R31 {
return C_REG
}
if REG_F0 <= a.Reg && a.Reg <= REG_F31 {
return C_FREG
}
if REG_M0 <= a.Reg && a.Reg <= REG_M31 {
return C_MREG
}
if REG_FCR0 <= a.Reg && a.Reg <= REG_FCR31 {
return C_FCREG
}
if a.Reg == REG_LO {
return C_LO
}
if a.Reg == REG_HI {
return C_HI
}
return C_GOK
case obj.TYPE_MEM:
switch a.Name {
case obj.NAME_EXTERN,
obj.NAME_STATIC:
if a.Sym == nil {
break
}
ctxt.Instoffset = a.Offset
if a.Sym != nil { // use relocation
if a.Sym.Type == obj.STLSBSS {
return C_TLS
}
return C_ADDR
}
return C_LEXT
case obj.NAME_AUTO:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset
if ctxt.Instoffset >= -BIG && ctxt.Instoffset < BIG {
return C_SAUTO
}
return C_LAUTO
case obj.NAME_PARAM:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset + 8
if ctxt.Instoffset >= -BIG && ctxt.Instoffset < BIG {
return C_SAUTO
}
return C_LAUTO
case obj.NAME_NONE:
ctxt.Instoffset = a.Offset
if ctxt.Instoffset == 0 {
return C_ZOREG
}
if ctxt.Instoffset >= -BIG && ctxt.Instoffset < BIG {
return C_SOREG
}
return C_LOREG
}
return C_GOK
case obj.TYPE_TEXTSIZE:
return C_TEXTSIZE
case obj.TYPE_CONST,
obj.TYPE_ADDR:
switch a.Name {
case obj.NAME_NONE:
ctxt.Instoffset = a.Offset
if a.Reg != 0 {
if -BIG <= ctxt.Instoffset && ctxt.Instoffset <= BIG {
return C_SACON
}
if isint32(ctxt.Instoffset) {
return C_LACON
}
return C_DACON
}
goto consize
case obj.NAME_EXTERN,
obj.NAME_STATIC:
s := a.Sym
if s == nil {
break
}
if s.Type == obj.SCONST {
ctxt.Instoffset = a.Offset
goto consize
}
ctxt.Instoffset = a.Offset
if s.Type == obj.STLSBSS {
return C_STCON // address of TLS variable
}
return C_LECON
case obj.NAME_AUTO:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset
if ctxt.Instoffset >= -BIG && ctxt.Instoffset < BIG {
return C_SACON
}
return C_LACON
case obj.NAME_PARAM:
ctxt.Instoffset = int64(ctxt.Autosize) + a.Offset + 8
if ctxt.Instoffset >= -BIG && ctxt.Instoffset < BIG {
return C_SACON
}
return C_LACON
}
return C_GOK
consize:
if ctxt.Instoffset >= 0 {
if ctxt.Instoffset == 0 {
return C_ZCON
}
if ctxt.Instoffset <= 0x7fff {
return C_SCON
}
if ctxt.Instoffset <= 0xffff {
return C_ANDCON
}
if ctxt.Instoffset&0xffff == 0 && isuint32(uint64(ctxt.Instoffset)) { /* && (instoffset & (1<<31)) == 0) */
return C_UCON
}
if isint32(ctxt.Instoffset) || isuint32(uint64(ctxt.Instoffset)) {
return C_LCON
}
return C_LCON // C_DCON
}
if ctxt.Instoffset >= -0x8000 {
return C_ADDCON
}
if ctxt.Instoffset&0xffff == 0 && isint32(ctxt.Instoffset) {
return C_UCON
}
if isint32(ctxt.Instoffset) {
return C_LCON
}
return C_LCON // C_DCON
case obj.TYPE_BRANCH:
return C_SBRA
}
return C_GOK
}
func prasm(p *obj.Prog) {
fmt.Printf("%v\n", p)
}
func oplook(ctxt *obj.Link, p *obj.Prog) *Optab {
if oprange[AOR&obj.AMask] == nil {
buildop(ctxt)
}
a1 := int(p.Optab)
if a1 != 0 {
return &optab[a1-1]
}
a1 = int(p.From.Class)
if a1 == 0 {
a1 = aclass(ctxt, &p.From) + 1
p.From.Class = int8(a1)
}
a1--
a3 := int(p.To.Class)
if a3 == 0 {
a3 = aclass(ctxt, &p.To) + 1
p.To.Class = int8(a3)
}
a3--
a2 := C_NONE
if p.Reg != 0 {
a2 = C_REG
}
//print("oplook %P %d %d %d\n", p, a1, a2, a3);
ops := oprange[p.As&obj.AMask]
c1 := &xcmp[a1]
c3 := &xcmp[a3]
for i := range ops {
op := &ops[i]
if int(op.a2) == a2 && c1[op.a1] && c3[op.a3] {
p.Optab = uint16(cap(optab) - cap(ops) + i + 1)
return op
}
}
ctxt.Diag("illegal combination %v %v %v %v", obj.Aconv(p.As), DRconv(a1), DRconv(a2), DRconv(a3))
prasm(p)
if ops == nil {
ops = optab
}
return &ops[0]
}
func cmp(a int, b int) bool {
if a == b {
return true
}
switch a {
case C_LCON:
if b == C_ZCON || b == C_SCON || b == C_UCON || b == C_ADDCON || b == C_ANDCON {
return true
}
case C_ADD0CON:
if b == C_ADDCON {
return true
}
fallthrough
case C_ADDCON:
if b == C_ZCON || b == C_SCON {
return true
}
case C_AND0CON:
if b == C_ANDCON {
return true
}
fallthrough
case C_ANDCON:
if b == C_ZCON || b == C_SCON {
return true
}
case C_UCON:
if b == C_ZCON {
return true
}
case C_SCON:
if b == C_ZCON {
return true
}
case C_LACON:
if b == C_SACON {
return true
}
case C_LBRA:
if b == C_SBRA {
return true
}
case C_LEXT:
if b == C_SEXT {
return true
}
case C_LAUTO:
if b == C_SAUTO {
return true
}
case C_REG:
if b == C_ZCON {
return r0iszero != 0 /*TypeKind(100016)*/
}
case C_LOREG:
if b == C_ZOREG || b == C_SOREG {
return true
}
case C_SOREG:
if b == C_ZOREG {
return true
}
}
return false
}
type ocmp []Optab
func (x ocmp) Len() int {
return len(x)
}
func (x ocmp) Swap(i, j int) {
x[i], x[j] = x[j], x[i]
}
func (x ocmp) Less(i, j int) bool {
p1 := &x[i]
p2 := &x[j]
n := int(p1.as) - int(p2.as)
if n != 0 {
return n < 0
}
n = int(p1.a1) - int(p2.a1)
if n != 0 {
return n < 0
}
n = int(p1.a2) - int(p2.a2)
if n != 0 {
return n < 0
}
n = int(p1.a3) - int(p2.a3)
if n != 0 {
return n < 0
}
return false
}
func opset(a, b0 obj.As) {
oprange[a&obj.AMask] = oprange[b0]
}
func buildop(ctxt *obj.Link) {
var n int
for i := 0; i < C_NCLASS; i++ {
for n = 0; n < C_NCLASS; n++ {
if cmp(n, i) {
xcmp[i][n] = true
}
}
}
for n = 0; optab[n].as != obj.AXXX; n++ {
}
sort.Sort(ocmp(optab[:n]))
for i := 0; i < n; i++ {
r := optab[i].as
r0 := r & obj.AMask
start := i
for optab[i].as == r {
i++
}
oprange[r0] = optab[start:i]
i--
switch r {
default:
ctxt.Diag("unknown op in build: %v", obj.Aconv(r))
log.Fatalf("bad code")
case AABSF:
opset(AMOVFD, r0)
opset(AMOVDF, r0)
opset(AMOVWF, r0)
opset(AMOVFW, r0)
opset(AMOVWD, r0)
opset(AMOVDW, r0)
opset(ANEGF, r0)
opset(ANEGD, r0)
opset(AABSD, r0)
opset(ATRUNCDW, r0)
opset(ATRUNCFW, r0)
opset(ATRUNCDV, r0)
opset(ATRUNCFV, r0)
opset(AMOVVF, r0)
opset(AMOVFV, r0)
opset(AMOVVD, r0)
opset(AMOVDV, r0)
case AADD:
opset(ASGT, r0)
opset(ASGTU, r0)
opset(AADDU, r0)
opset(AADDV, r0)
opset(AADDVU, r0)
case AADDF:
opset(ADIVF, r0)
opset(ADIVD, r0)
opset(AMULF, r0)
opset(AMULD, r0)
opset(ASUBF, r0)
opset(ASUBD, r0)
opset(AADDD, r0)
case AAND:
opset(AOR, r0)
opset(AXOR, r0)
case ABEQ:
opset(ABNE, r0)
case ABLEZ:
opset(ABGEZ, r0)
opset(ABGEZAL, r0)
opset(ABLTZ, r0)
opset(ABLTZAL, r0)
opset(ABGTZ, r0)
case AMOVB:
opset(AMOVH, r0)
case AMOVBU:
opset(AMOVHU, r0)
case AMUL:
opset(AREM, r0)
opset(AREMU, r0)
opset(ADIVU, r0)
opset(AMULU, r0)
opset(ADIV, r0)
opset(ADIVV, r0)
opset(ADIVVU, r0)
opset(AMULV, r0)
opset(AMULVU, r0)
opset(AREMV, r0)
opset(AREMVU, r0)
case ASLL:
opset(ASRL, r0)
opset(ASRA, r0)
opset(ASLLV, r0)
opset(ASRAV, r0)
opset(ASRLV, r0)
case ASUB:
opset(ASUBU, r0)
opset(ASUBV, r0)
opset(ASUBVU, r0)
opset(ANOR, r0)
case ASYSCALL:
opset(ATLBP, r0)
opset(ATLBR, r0)
opset(ATLBWI, r0)
opset(ATLBWR, r0)
case ACMPEQF:
opset(ACMPGTF, r0)
opset(ACMPGTD, r0)
opset(ACMPGEF, r0)
opset(ACMPGED, r0)
opset(ACMPEQD, r0)
case ABFPT:
opset(ABFPF, r0)
case AMOVWL:
opset(AMOVWR, r0)
opset(AMOVVR, r0)
opset(AMOVVL, r0)
case AMOVW,
AMOVD,
AMOVF,
AMOVV,
ABREAK,
ARFE,
AJAL,
AJMP,
AMOVWU,
AWORD,
obj.ANOP,
obj.ATEXT,
obj.AUNDEF,
obj.AUSEFIELD,
obj.AFUNCDATA,
obj.APCDATA,
obj.ADUFFZERO,
obj.ADUFFCOPY:
break
}
}
}
func OP(x uint32, y uint32) uint32 {
return x<<3 | y<<0
}
func SP(x uint32, y uint32) uint32 {
return x<<29 | y<<26
}
func BCOND(x uint32, y uint32) uint32 {
return x<<19 | y<<16
}
func MMU(x uint32, y uint32) uint32 {
return SP(2, 0) | 16<<21 | x<<3 | y<<0
}
func FPF(x uint32, y uint32) uint32 {
return SP(2, 1) | 16<<21 | x<<3 | y<<0
}
func FPD(x uint32, y uint32) uint32 {
return SP(2, 1) | 17<<21 | x<<3 | y<<0
}
func FPW(x uint32, y uint32) uint32 {
return SP(2, 1) | 20<<21 | x<<3 | y<<0
}
func FPV(x uint32, y uint32) uint32 {
return SP(2, 1) | 21<<21 | x<<3 | y<<0
}
func OP_RRR(op uint32, r1 uint32, r2 uint32, r3 uint32) uint32 {
return op | (r1&31)<<16 | (r2&31)<<21 | (r3&31)<<11
}
func OP_IRR(op uint32, i uint32, r2 uint32, r3 uint32) uint32 {
return op | i&0xFFFF | (r2&31)<<21 | (r3&31)<<16
}
func OP_SRR(op uint32, s uint32, r2 uint32, r3 uint32) uint32 {
return op | (s&31)<<6 | (r2&31)<<16 | (r3&31)<<11
}
func OP_FRRR(op uint32, r1 uint32, r2 uint32, r3 uint32) uint32 {
return op | (r1&31)<<16 | (r2&31)<<11 | (r3&31)<<6
}
func OP_JMP(op uint32, i uint32) uint32 {
return op | i&0x3FFFFFF
}
func asmout(ctxt *obj.Link, p *obj.Prog, o *Optab, out []uint32) {
o1 := uint32(0)
o2 := uint32(0)
o3 := uint32(0)
o4 := uint32(0)
switch o.type_ {
default:
ctxt.Diag("unknown type %d %v", o.type_)