your compiling it in 32bit mode..
-f elf64
or
-f win64
or
-f elf -m amd64
thanks, this helped a bit, but still errors.
$ yasm -f elf -m amd64 -o cgminer-sha256_sse4_amd64.o cgminer-sha256_sse4_amd64.asm
cgminer-sha256_sse4_amd64.asm:33: warning: Unrecognized qualifier `execute'
cgminer-sha256_sse4_amd64.asm:103: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:111: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:123: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:131: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:137: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:143: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:149: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:157: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:161: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:167: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:173: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:179: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:185: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:191: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:197: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:203: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:209: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:215: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:221: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:227: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:233: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:239: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:245: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:251: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:259: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:263: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:269: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:275: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:281: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:287: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:293: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:305: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:311: error: undefined symbol `g_4sha256_k' (first use)
cgminer-sha256_sse4_amd64.asm:311: error: (Each undefined symbol is reported only once.)
cgminer-sha256_sse4_amd64.asm:367: error: instruction expected after label
cgminer-sha256_sse4_amd64.asm:375: error: undefined symbol `?_004.LC0' (first use)
cgminer-sha256_sse4_amd64.asm:515: warning: Unrecognized qualifier `noexecute'
cgminer-sha256_sse4_amd64.asm:533: warning: Unrecognized qualifier `noexecute'
cgminer-sha256_sse4_amd64.asm:539: warning: Unrecognized qualifier `noexecute'
cgminer-sha256_sse4_amd64.asm:613: warning: Unrecognized qualifier `noexecute'
cgminer-sha256_sse4_amd64.asm:629: warning: Unrecognized qualifier `noexecute'
after reading in the yasm-wiki i fixed "warning: Unrecognized qualifier `noexecute'" by changing "noexecute" to "noexec".
but i assume, the asm-source syntax is correct and i am compiling still wrong.