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LibJIT: Emit 8-bit displacement variants for mov when possible
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parent
d09bc54586
commit
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1 changed files with 14 additions and 4 deletions
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@ -140,8 +140,13 @@ struct Assembler {
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| ((to_underlying(src.reg) >= 8) ? 1 << 2 : 0)
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| ((to_underlying(dst.reg) >= 8) ? 1 << 0 : 0));
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emit8(0x89);
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emit8(0x80 | (encode_reg(src.reg) << 3) | encode_reg(dst.reg));
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emit32(dst.offset_or_immediate);
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if (dst.offset_or_immediate <= 127) {
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emit8(0x40 | (encode_reg(src.reg) << 3) | encode_reg(dst.reg));
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emit8(dst.offset_or_immediate);
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} else {
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emit8(0x80 | (encode_reg(src.reg) << 3) | encode_reg(dst.reg));
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emit32(dst.offset_or_immediate);
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}
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return;
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}
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@ -150,8 +155,13 @@ struct Assembler {
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| ((to_underlying(dst.reg) >= 8) ? 1 << 2 : 0)
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| ((to_underlying(src.reg) >= 8) ? 1 << 0 : 0));
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emit8(0x8b);
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emit8(0x80 | (encode_reg(dst.reg) << 3) | encode_reg(src.reg));
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emit32(src.offset_or_immediate);
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if (src.offset_or_immediate <= 127) {
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emit8(0x40 | (encode_reg(dst.reg) << 3) | encode_reg(src.reg));
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emit8(src.offset_or_immediate);
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} else {
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emit8(0x80 | (encode_reg(dst.reg) << 3) | encode_reg(src.reg));
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emit32(src.offset_or_immediate);
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}
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return;
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}
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