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Error in Table "32/64-bit ModR/M Byte" #10

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d0sboots opened this issue May 25, 2019 · 2 comments
Closed

Error in Table "32/64-bit ModR/M Byte" #10

d0sboots opened this issue May 25, 2019 · 2 comments
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@d0sboots
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In the Table "32/64-bit ModR/M Byte", for Mod=00, R/M=001 the effective address is listed as "[RCX/EDX]+disp8". This is incorrect, it should be "[RCX/ECX]+disp8". (I.e. with 32-bit operands the base register remains ECX.)

This is verified both by the correct listing in the table below, "32-bit ModR/M Byte", as well as Intel's official manual.
@BarebitOpenSource
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Thank you for spotting it, it's a typo. It takes some time to fix it.

Relevant link: http://ref.x86asm.net/coder64.html#modrm_byte_32_64

@BarebitOpenSource BarebitOpenSource added the HTML editions not connected to the XML or XSL core files label May 31, 2019
@BarebitOpenSource
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Moved to mazegen/x86reference#17

@BarebitOpenSource BarebitOpenSource closed this as not planned Won't fix, can't repro, duplicate, stale Jun 5, 2024
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@d0sboots @BarebitOpenSource