Something i found * EAX – Accumulator Register * EBX – Base Register * ECX – Counter Register * EDX – Data Register * ESI – Source Index * EDI – Destination Index * EBP – Base Pointer * ESP – Stack Pointer
Editor’s note: this way of using a local register-asm variable is now documented by GCC as “not supported”. It still usually happens to work on GCC, but breaks with clang. (This wording in the documentation was added after this answer was posted, I think.) The global fixed-register variable version has a large performance cost for … Read more
On the 8086 (and 16-bit addressing in x86), only addressing modes of the form [bp|bx] + [si|di] + disp0/8/16 are available. Listing them all: [bx] [bx + foo] [foo] [bp + foo] [si] [si + foo] [di] [di + foo] [bx + si] [bx + si + foo] [bx + di] [bx + di + … Read more