CODEWITHSUNDEEP
printfx86-64nasm
user1050632
user1050632

Reputation: 668

printing out floating point value

Trying to print out floating point number from st0 register.

Currently I have to pass the value through xmm0 register then call c function printf.

is there any way to pass the value from the st0 register straight into printf?

Upvotes: 1

Views: 263

Answers (1)

Necrolis
Necrolis

Reputation: 26171

the x86-64 ABI's require that you use XMM registers to pass around floating point values, so unless you write a custom printf that uses your own ABI (calling convention), there is really no way around this.

Upvotes: 2

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