Skip to content

Commit 79d40c2

Browse files
author
Jorge Aparicio
committed
implement cabi for 32-bit sparc
1 parent bea6ab2 commit 79d40c2

File tree

3 files changed

+111
-0
lines changed

3 files changed

+111
-0
lines changed

src/librustc_trans/abi.rs

+2
Original file line numberDiff line numberDiff line change
@@ -25,6 +25,7 @@ use cabi_mips;
2525
use cabi_mips64;
2626
use cabi_asmjs;
2727
use cabi_msp430;
28+
use cabi_sparc;
2829
use machine::{llalign_of_min, llsize_of, llsize_of_alloc};
2930
use type_::Type;
3031
use type_of;
@@ -609,6 +610,7 @@ impl FnType {
609610
"asmjs" => cabi_asmjs::compute_abi_info(ccx, self),
610611
"wasm32" => cabi_asmjs::compute_abi_info(ccx, self),
611612
"msp430" => cabi_msp430::compute_abi_info(ccx, self),
613+
"sparc" => cabi_sparc::compute_abi_info(ccx, self),
612614
a => ccx.sess().fatal(&format!("unrecognized arch \"{}\" in target specification", a))
613615
}
614616

src/librustc_trans/cabi_sparc.rs

+108
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,108 @@
1+
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2+
// file at the top-level directory of this distribution and at
3+
// http://rust-lang.org/COPYRIGHT.
4+
//
5+
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6+
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7+
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8+
// option. This file may not be copied, modified, or distributed
9+
// except according to those terms.
10+
11+
#![allow(non_upper_case_globals)]
12+
13+
use libc::c_uint;
14+
use std::cmp;
15+
use llvm;
16+
use llvm::{Integer, Pointer, Float, Double, Vector};
17+
use abi::{self, align_up_to, ArgType, FnType};
18+
use context::CrateContext;
19+
use type_::Type;
20+
21+
fn ty_align(ty: Type) -> usize {
22+
abi::ty_align(ty, 4)
23+
}
24+
25+
fn ty_size(ty: Type) -> usize {
26+
abi::ty_size(ty, 4)
27+
}
28+
29+
fn classify_ret_ty(ccx: &CrateContext, ret: &mut ArgType) {
30+
if is_reg_ty(ret.ty) {
31+
ret.extend_integer_width_to(32);
32+
} else {
33+
ret.make_indirect(ccx);
34+
}
35+
}
36+
37+
fn classify_arg_ty(ccx: &CrateContext, arg: &mut ArgType, offset: &mut usize) {
38+
let orig_offset = *offset;
39+
let size = ty_size(arg.ty) * 8;
40+
let mut align = ty_align(arg.ty);
41+
42+
align = cmp::min(cmp::max(align, 4), 8);
43+
*offset = align_up_to(*offset, align);
44+
*offset += align_up_to(size, align * 8) / 8;
45+
46+
if !is_reg_ty(arg.ty) {
47+
arg.cast = Some(struct_ty(ccx, arg.ty));
48+
arg.pad = padding_ty(ccx, align, orig_offset);
49+
} else {
50+
arg.extend_integer_width_to(32);
51+
}
52+
}
53+
54+
fn is_reg_ty(ty: Type) -> bool {
55+
return match ty.kind() {
56+
Integer
57+
| Pointer
58+
| Float
59+
| Double
60+
| Vector => true,
61+
_ => false
62+
};
63+
}
64+
65+
fn padding_ty(ccx: &CrateContext, align: usize, offset: usize) -> Option<Type> {
66+
if ((align - 1 ) & offset) > 0 {
67+
Some(Type::i32(ccx))
68+
} else {
69+
None
70+
}
71+
}
72+
73+
fn coerce_to_int(ccx: &CrateContext, size: usize) -> Vec<Type> {
74+
let int_ty = Type::i32(ccx);
75+
let mut args = Vec::new();
76+
77+
let mut n = size / 32;
78+
while n > 0 {
79+
args.push(int_ty);
80+
n -= 1;
81+
}
82+
83+
let r = size % 32;
84+
if r > 0 {
85+
unsafe {
86+
args.push(Type::from_ref(llvm::LLVMIntTypeInContext(ccx.llcx(), r as c_uint)));
87+
}
88+
}
89+
90+
args
91+
}
92+
93+
fn struct_ty(ccx: &CrateContext, ty: Type) -> Type {
94+
let size = ty_size(ty) * 8;
95+
Type::struct_(ccx, &coerce_to_int(ccx, size), false)
96+
}
97+
98+
pub fn compute_abi_info(ccx: &CrateContext, fty: &mut FnType) {
99+
if !fty.ret.is_ignore() {
100+
classify_ret_ty(ccx, &mut fty.ret);
101+
}
102+
103+
let mut offset = if fty.ret.is_indirect() { 4 } else { 0 };
104+
for arg in &mut fty.args {
105+
if arg.is_ignore() { continue; }
106+
classify_arg_ty(ccx, arg, &mut offset);
107+
}
108+
}

src/librustc_trans/lib.rs

+1
Original file line numberDiff line numberDiff line change
@@ -107,6 +107,7 @@ mod cabi_msp430;
107107
mod cabi_powerpc;
108108
mod cabi_powerpc64;
109109
mod cabi_s390x;
110+
mod cabi_sparc;
110111
mod cabi_x86;
111112
mod cabi_x86_64;
112113
mod cabi_x86_win64;

0 commit comments

Comments
 (0)