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#include<spu_intrinsics.h>
void* libvector_16s_cmpgt_unaligned(void* target, void* src, signed short val, unsigned int num_bytes){
//loop iterator i
int i = 0;
void* retval = target;
//put the target and source addresses into qwords
vector unsigned int address_counter_tgt = {(unsigned int)target, 0, 0, 0};
vector unsigned int address_counter_src = {(unsigned int)src, 0, 0 ,0};
//create shuffle masks
//shuffle mask building blocks:
//all from the first vector
vector unsigned char oneup = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
//all from the second vector
vector unsigned char second_oneup = {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f};
//gamma: second half of the second, first half of the first, break at (unsigned int)src%16
vector unsigned char src_cmp = spu_splats((unsigned char)((unsigned int)src%16));
vector unsigned char gt_res = spu_cmpgt(oneup, src_cmp);
vector unsigned char eq_res = spu_cmpeq(oneup, src_cmp);
vector unsigned char cmp_res = spu_or(gt_res, eq_res);
vector unsigned char sixteen_uchar = spu_splats((unsigned char)16);
vector unsigned char phase_change = spu_and(sixteen_uchar, cmp_res);
vector unsigned int shuffle_mask_gamma = spu_add((vector unsigned int)phase_change,
(vector unsigned int)oneup);
shuffle_mask_gamma = spu_rlqwbyte(shuffle_mask_gamma, (unsigned int)src%16);
vector unsigned char tgt_second = spu_rlqwbyte(second_oneup, -((unsigned int)target%16));
vector unsigned char tgt_first = spu_rlqwbyte(oneup, -((unsigned int)target%16));
//alpha: first half of first, second half of second, break at (unsigned int)target%16
src_cmp = spu_splats((unsigned char)((unsigned int)target%16));
gt_res = spu_cmpgt(oneup, src_cmp);
eq_res = spu_cmpeq(oneup, src_cmp);
cmp_res = spu_or(gt_res, eq_res);
phase_change = spu_and(sixteen_uchar, cmp_res);
vector unsigned int shuffle_mask_alpha = spu_add((vector unsigned int)phase_change,
(vector unsigned int)oneup);
//delta: first half of first, first half of second, break at (unsigned int)target%16
vector unsigned char shuffle_mask_delta = spu_shuffle(oneup, tgt_second, (vector unsigned char)shuffle_mask_alpha);
//epsilon: second half of second, second half of first, break at (unsigned int)target%16
vector unsigned char shuffle_mask_epsilon = spu_shuffle(tgt_second, oneup, (vector unsigned char)shuffle_mask_alpha);
//zeta: second half of second, first half of first, break at 16 - (unsigned int)target%16
vector unsigned int shuffle_mask_zeta = spu_rlqwbyte(shuffle_mask_alpha, (unsigned int)target%16);
//beta: first half of first, second half of second, break at num_bytes%16
src_cmp = spu_splats((unsigned char)(num_bytes%16));
gt_res = spu_cmpgt(oneup, src_cmp);
eq_res = spu_cmpeq(oneup, src_cmp);
cmp_res = spu_or(gt_res, eq_res);
phase_change = spu_and(sixteen_uchar, cmp_res);
vector unsigned int shuffle_mask_beta = spu_add((vector unsigned int)phase_change,
(vector unsigned int)oneup);
qword src_past;
qword src_present;
qword tgt_past;
qword tgt_present;
qword in_temp;
qword out_temp0;
qword out_temp1;
src_past = si_lqd((qword)address_counter_src, 0);
tgt_past = si_lqd((qword)address_counter_tgt, 0);
vector signed short vec_val = spu_splats(val);
vector unsigned short compare;
vector unsigned short ones = {1, 1, 1, 1, 1, 1, 1, 1};
vector unsigned short after_and;
for(i = 0; i < num_bytes/16; ++i) {
src_present = si_lqd((qword)address_counter_src, 16);
tgt_present = si_lqd((qword)address_counter_tgt, 16);
in_temp = spu_shuffle(src_present, src_past, (vector unsigned char)shuffle_mask_gamma);
compare = spu_cmpgt((vector signed short) in_temp, vec_val);
after_and = spu_and(compare, ones);
out_temp0 = spu_shuffle(tgt_past, (qword)after_and, shuffle_mask_delta);
out_temp1 = spu_shuffle(tgt_present, (qword)after_and, shuffle_mask_epsilon);
si_stqd(out_temp0, (qword)address_counter_tgt, 0);
si_stqd(out_temp1, (qword)address_counter_tgt, 16);
tgt_past = out_temp1;
src_past = src_present;
address_counter_src = spu_add(address_counter_src, 16);
address_counter_tgt = spu_add(address_counter_tgt, 16);
}
src_present = si_lqd((qword)address_counter_src, 16);
tgt_present = si_lqd((qword)address_counter_tgt, 16);
in_temp = spu_shuffle(src_present, src_past,(vector unsigned char) shuffle_mask_gamma);
compare = spu_cmpgt((vector signed short) in_temp, vec_val);
after_and = spu_and(compare, ones);
qword target_temp = spu_shuffle(tgt_present, tgt_past, (vector unsigned char) shuffle_mask_zeta);
qword meld = spu_shuffle((qword)after_and, target_temp, (vector unsigned char)shuffle_mask_beta);
out_temp0 = spu_shuffle(tgt_past, meld, shuffle_mask_delta);
out_temp1 = spu_shuffle(tgt_present, meld, shuffle_mask_epsilon);
si_stqd(out_temp0, (qword)address_counter_tgt, 0);
si_stqd(out_temp1, (qword)address_counter_tgt, 16);
return retval;
}
/*
int main(){
signed short pooh[48];
signed short bear[48];
int i = 0;
for(i = 0; i < 48; i += 2){
bear[i] = i;
bear[i + 1] = -i;
}
vector_gt_16bit(&pooh[0],&bear[0], 0, 48 * sizeof(signed short));
for(i = 0; i < 48; ++i) {
printf("%d, ", pooh[i]);
}
printf("\n");
}
*/
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