Re: Using YMM registers causes an undefined label error

[z via Digitalmars-d-learn]

On Friday, 5 March 2021 at 12:57:43 UTC, z wrote:
...

Then it seems the only way to get AVX-compatible inline 
assembly(ldc.llvmasm excluded) is to use an external assembler.

For example :
import std.stdio;
extern(C) void vxorps_d(ubyte[32]*);

void main() {
        ubyte[32] a = 2;
        writefln!"Contents of a before : %( %s %)"(a);
        vxorps_d(&a);
        writefln!"Contents of a after  : %( %s %)"(a);
}



BITS 64

global vxorps_d

section .text2
vxorps_d:
        vmovups ymm0, [rcx];
        mov rdx, zerofilled
        vbroadcastss ymm1, [rdx]
        vxorps ymm0, ymm0, ymm1
        vmovups [rcx], ymm0
        ret
zerofilled:
db 0xFF,0xFF,0xFF,0xFF

nasm -g -f win64 asmfile.asm

dmd vxorpstest.d asmfile.obj -m64
ldc vxorpstest.d asmfile.obj -m64

vxorpstest.exe
Contents of a before :  2  2  2... (0x02/0b0000_0010)
Contents of a after  :  253  253  253...(0xFD/0b1111_1101)