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Use explicit rex for brz and brnz encodings (#1308)

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Fixes #1305. This papers over the problem to prevent crashes while we investigate the cause.
This commit is contained in:
bjorn3
2019-12-22 07:10:36 +01:00
committed by Sean Stangl
parent c1c55607e1
commit 9fcd561220
1 changed files with 4 additions and 4 deletions
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8
cranelift/codegen/meta/src/isa/x86/encodings.rs
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@@ -1368,10 +1368,10 @@ pub(crate) fn define(
e.enc_both(brff, rec_brfd.opcodes(&JUMP_NEAR_IF_OVERFLOW));
// Note that the tjccd opcode will be prefixed with 0x0f.
e.enc_i32_i64(brz, rec_tjccb.opcodes(&JUMP_SHORT_IF_EQUAL));
e.enc_i32_i64(brz, rec_tjccd.opcodes(&TEST_BYTE_REG));
e.enc_i32_i64(brnz, rec_tjccb.opcodes(&JUMP_SHORT_IF_NOT_EQUAL));
e.enc_i32_i64(brnz, rec_tjccd.opcodes(&TEST_REG));
e.enc_i32_i64_explicit_rex(brz, rec_tjccb.opcodes(&JUMP_SHORT_IF_EQUAL));
e.enc_i32_i64_explicit_rex(brz, rec_tjccd.opcodes(&TEST_BYTE_REG));
e.enc_i32_i64_explicit_rex(brnz, rec_tjccb.opcodes(&JUMP_SHORT_IF_NOT_EQUAL));
e.enc_i32_i64_explicit_rex(brnz, rec_tjccd.opcodes(&TEST_REG));
// Branch on a b1 value in a register only looks at the low 8 bits. See also
// bint encodings below.