ppu: improve lvebx/lvehx/lvewx instructions

[scribam]

Test:

#include <stdio.h>
#include <math.h>
#include <float.h>
#include <altivec.h>
#include <ppu_intrinsics.h>

#define PRINT_VECTOR(v0)  printf("%08x %08x %08x %08x\n", ((vec_int4)v0)[0], ((vec_int4)v0)[1], ((vec_int4)v0)[2], ((vec_int4)v0)[3]);

int main(void)
{
	unsigned char srcUChars[16]   = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
	unsigned short srcUShorts[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
	unsigned int srcUInts[16]     = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};

	// Vector Load Instructions
	for (int i = 0; i < 16; i++)
	{
		printf("vec_lvebx  (%d, srcUChars)  -> ", i); PRINT_VECTOR(vec_lvebx(i, srcUChars));
		printf("vec_lvehx  (%d, srcUShorts) -> ", i); PRINT_VECTOR(vec_lvehx(i, srcUShorts));
		printf("vec_lvewx  (%d, srcUInts)   -> ", i); PRINT_VECTOR(vec_lvewx(i, srcUInts));
		printf("vec_lvx    (%d, srcUInts)   -> ", i); PRINT_VECTOR(vec_lvx(i, srcUInts));
	}

	return 0;
}

[Nekotekina]

Could write return LVX(op); then if they are supposed to be identical, the same applies to the interpreter.

[scribam]

Done. Yes, they are identical. Xenia also mentions that: https://github.com/xenia-project/xenia/blob/827e3a0be467e54e3ac76ca5574215424bf94bdf/src/xenia/cpu/ppc/ppc_emit_altivec.cc#L73

[AniLeo]

Don't spam the tracker.