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remove rex-prefixed recipes for e9 and eb jumps

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while not incorrect, the prefix has no additional semantics on these
  instructions other than taking an extra byte for the jump
This commit is contained in:
iximeow
2019-05-17 12:28:46 -07:00
committed by Benjamin Bouvier
parent f427a2b923
commit 6059936113
4 changed files with 22 additions and 20 deletions
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6
cranelift/codegen/meta-python/isa/x86/encodings.py
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@@ -490,8 +490,10 @@ X86_64.enc(base.x_return, *r.ret(0xc3))
#
# Branches
#
enc_both(base.jump, r.jmpb, 0xeb)
enc_both(base.jump, r.jmpd, 0xe9)
X86_32.enc(base.jump, *r.jmpb(0xeb))
X86_64.enc(base.jump, *r.jmpb(0xeb))
X86_32.enc(base.jump, *r.jmpd(0xe9))
X86_64.enc(base.jump, *r.jmpd(0xe9))
enc_both(base.brif, r.brib, 0x70)
enc_both(base.brif, r.brid, 0x0f, 0x80)