Hardware square root gcc - Printable Version +- 0Day Forums (https://zeroday.vip) +-- Forum: Coding (https://zeroday.vip/Forum-Coding) +--- Forum: Assembly (https://zeroday.vip/Forum-Assembly) +--- Thread: Hardware square root gcc (/Thread-Hardware-square-root-gcc) |
Hardware square root gcc - philliepgmkygi - 07-24-2023 I'm trying to use the hardware instructions to compute some mathematical functions. For example the square root (sqrtpd instruction). I'm compiling my C code with GCC. Does Anybody know what are the gcc options to force to compile with the hardware instructions and not to use the libc? Or if I need to do something special on my source code? (Without writing asm code). RE: Hardware square root gcc - chamois256 - 07-24-2023 On gcc you should use `__builtin_ia32_sqrtpd`. RE: Hardware square root gcc - strewn699342 - 07-24-2023 The easiest way is to use optimization flags. -O1 generates `sqrtsd %xmm1, %xmm0` in assembly code. Try using -S flag with gcc to generate assembly and look how optimization flags works. RE: Hardware square root gcc - silsby383 - 07-24-2023 Why don't you just write the desired hardware instruction in assembly code directly. As far as I know, writing assembly code directly in c code is possible. It is called Inline Assembly. [ See here: [To see links please register here] ] |