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Tidy up some comments.

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This commit is contained in:
Dan Gohman
2018-10-04 09:19:09 -07:00
parent b2a28d69e6
commit 2eb9ae45aa
2 changed files with 4 additions and 3 deletions
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4
lib/codegen/meta-python/isa/x86/recipes.py
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@@ -1510,11 +1510,11 @@ jt_base = TailRecipe(
'jt_base', BranchTableBase, size=5, ins=(), outs=(GPR), 'jt_base', BranchTableBase, size=5, ins=(), outs=(GPR),
clobbers_flags=False, clobbers_flags=False,
emit=''' emit='''
// No reloc is needed here as the jump table is emitted directly after
// the function body.
PUT_OP(bits, rex2(0, out_reg0), sink); PUT_OP(bits, rex2(0, out_reg0), sink);
modrm_riprel(out_reg0, sink); modrm_riprel(out_reg0, sink);
// No reloc is needed here as the jump table is emitted directly after
// the function body.
jt_disp4(table, func, sink); jt_disp4(table, func, sink);
''') ''')

3
lib/codegen/src/isa/x86/binemit.rs
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@@ -328,12 +328,13 @@ fn disp1<CS: CodeSink + ?Sized>(destination: Ebb, func: &Function, sink: &mut CS
sink.put1(delta as u8); sink.put1(delta as u8);
} }
/// Emit a single-byte branch displacement to `destination`. /// Emit a four-byte branch displacement to `destination`.
fn disp4<CS: CodeSink + ?Sized>(destination: Ebb, func: &Function, sink: &mut CS) { fn disp4<CS: CodeSink + ?Sized>(destination: Ebb, func: &Function, sink: &mut CS) {
let delta = func.offsets[destination].wrapping_sub(sink.offset() + 4); let delta = func.offsets[destination].wrapping_sub(sink.offset() + 4);
sink.put4(delta); sink.put4(delta);
} }
/// Emit a four-byte displacement to jump table `jt`.
fn jt_disp4<CS: CodeSink + ?Sized>(jt: JumpTable, func: &Function, sink: &mut CS) { fn jt_disp4<CS: CodeSink + ?Sized>(jt: JumpTable, func: &Function, sink: &mut CS) {
let delta = func.jt_offsets[jt].wrapping_sub(sink.offset() + 4); let delta = func.jt_offsets[jt].wrapping_sub(sink.offset() + 4);
sink.put4(delta); sink.put4(delta);