Newer
Older
// Copyright 2025 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package asmgen
var ArchARM = &Arch{
Name: "arm",
WordBits: 32,
WordBytes: 4,
CarrySafeLoop: true,
regs: []string{
// R10 is g.
// R11 is the assembler/linker temporary (but we use it as a regular register).
// R13 is SP.
// R14 is LR.
// R15 is PC.
"R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "R11", "R12",
},
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
mov: "MOVW",
add: "ADD",
adds: "ADD.S",
adc: "ADC",
adcs: "ADC.S",
sub: "SUB",
subs: "SUB.S",
sbc: "SBC",
sbcs: "SBC.S",
rsb: "RSB",
and: "AND",
or: "ORR",
xor: "EOR",
mulWideF: armMulWide,
addWords: "ADD %s<<2, %s, %s",
jmpZero: "TEQ $0, %s; BEQ %s",
jmpNonZero: "TEQ $0, %s; BNE %s",
loadIncN: armLoadIncN,
loadDecN: armLoadDecN,
storeIncN: armStoreIncN,
storeDecN: armStoreDecN,
}
func armMulWide(a *Asm, src1, src2, dstlo, dsthi Reg) {
a.Printf("\tMULLU %s, %s, (%s, %s)\n", src1, src2, dsthi, dstlo)
}
func armLoadIncN(a *Asm, p RegPtr, regs []Reg) {
for _, r := range regs {
a.Printf("\tMOVW.P %d(%s), %s\n", a.Arch.WordBytes, p, r)
}
}
func armLoadDecN(a *Asm, p RegPtr, regs []Reg) {
for _, r := range regs {
a.Printf("\tMOVW.W %d(%s), %s\n", -a.Arch.WordBytes, p, r)
}
}
func armStoreIncN(a *Asm, p RegPtr, regs []Reg) {
for _, r := range regs {
a.Printf("\tMOVW.P %s, %d(%s)\n", r, a.Arch.WordBytes, p)
}
}
func armStoreDecN(a *Asm, p RegPtr, regs []Reg) {
for _, r := range regs {
a.Printf("\tMOVW.W %s, %d(%s)\n", r, -a.Arch.WordBytes, p)
}
}