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cbe: fix named constraints without modifiers

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This commit is contained in:
Jacob Young 2022-12-03 03:30:43 -05:00
parent f68bfe2eb7
commit 2cfc08ba0d
1 changed files with 29 additions and 15 deletions
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44
src/codegen/c.zig
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@ -4195,7 +4195,7 @@ fn airAsm(f: *Function, inst: Air.Inst.Index) !CValue {
}
}
{
const asm_source = std.mem.sliceAsBytes(f.air.extra[extra_i..])[0..extra.data.source_len];
const asm_source = mem.sliceAsBytes(f.air.extra[extra_i..])[0..extra.data.source_len];
var stack = std.heap.stackFallback(256, f.object.dg.gpa);
const allocator = stack.get();
@ -4204,29 +4204,43 @@ fn airAsm(f: *Function, inst: Air.Inst.Index) !CValue {
var src_i: usize = 0;
var dst_i: usize = 0;
while (src_i < asm_source.len) : (src_i += 1) {
fixed_asm_source[dst_i] = asm_source[src_i];
dst_i += 1;
if (asm_source[src_i] != '%' or src_i + 1 >= asm_source.len) continue;
while (true) {
const literal = mem.sliceTo(asm_source[src_i..], '%');
src_i += literal.len;
mem.copy(u8, fixed_asm_source[dst_i..], literal);
dst_i += literal.len;
if (src_i >= asm_source.len) break;
src_i += 1;
if (src_i >= asm_source.len)
return f.fail("CBE: invalid inline asm string '{s}'", .{asm_source});
fixed_asm_source[dst_i] = '%';
dst_i += 1;
if (asm_source[src_i] != '[') {
// This handles %%
// This also handles %%
fixed_asm_source[dst_i] = asm_source[src_i];
src_i += 1;
dst_i += 1;
continue;
}
const len = std.mem.indexOfScalar(u8, asm_source[src_i + 1 ..], ']') orelse
return f.fail("CBE: invalid inline asm string '{s}'", .{asm_source});
if (std.mem.indexOfScalar(u8, asm_source[src_i + 1 ..][0..len], ':')) |colon| {
const modifier = asm_source[src_i + 1 + colon + 1 .. src_i + 1 + len];
std.mem.copy(u8, fixed_asm_source[dst_i..], modifier);
dst_i += modifier.len;
const name = asm_source[src_i .. src_i + 1 + colon];
std.mem.copy(u8, fixed_asm_source[dst_i..], name);
const desc = mem.sliceTo(asm_source[src_i..], ']');
if (mem.indexOfScalar(u8, desc, ':')) |colon| {
const name = desc[0..colon];
const modifier = desc[colon + 1 ..];
mem.copy(u8, fixed_asm_source[dst_i..], modifier);
dst_i += modifier.len;
mem.copy(u8, fixed_asm_source[dst_i..], name);
dst_i += name.len;
src_i += len;
src_i += desc.len;
if (src_i >= asm_source.len)
return f.fail("CBE: invalid inline asm string '{s}'", .{asm_source});
}
}