diff options
Diffstat (limited to 'src/devices/cpu/rsp/vmac.h')
-rw-r--r-- | src/devices/cpu/rsp/vmac.h | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/src/devices/cpu/rsp/vmac.h b/src/devices/cpu/rsp/vmac.h deleted file mode 100644 index ade43511daa..00000000000 --- a/src/devices/cpu/rsp/vmac.h +++ /dev/null @@ -1,57 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Tyler J. Stachecki,Ryan Holtz - -inline rsp_vec_t vec_vmacf_vmacu(uint32_t iw, rsp_vec_t vs, rsp_vec_t vt, rsp_vec_t zero, rsp_vec_t *acc_lo, rsp_vec_t *acc_mid, rsp_vec_t *acc_hi) -{ - // Get the product and shift it over - // being sure to save the carries. - rsp_vec_t lo = _mm_mullo_epi16(vs, vt); - rsp_vec_t hi = _mm_mulhi_epi16(vs, vt); - - rsp_vec_t mid = _mm_slli_epi16(hi, 1); - rsp_vec_t carry = _mm_srli_epi16(lo, 15); - hi = _mm_srai_epi16(hi, 15); - mid = _mm_or_si128(mid, carry); - lo = _mm_slli_epi16(lo, 1); - - // Tricky part: start accumulating everything. - // Get/keep the carry as we'll add it in later. - rsp_vec_t overflow_mask = _mm_adds_epu16(*acc_lo, lo); - *acc_lo = _mm_add_epi16(*acc_lo, lo); - - overflow_mask = _mm_cmpeq_epi16(*acc_lo, overflow_mask); - overflow_mask = _mm_cmpeq_epi16(overflow_mask, zero); - - // Add in the carry. If the middle portion is - // already 0xFFFF and we have a carry, we have - // to carry the all the way up to hi. - mid = _mm_sub_epi16(mid, overflow_mask); - carry = _mm_cmpeq_epi16(mid, zero); - carry = _mm_and_si128(carry, overflow_mask); - hi = _mm_sub_epi16(hi, carry); - - // Accumulate the middle portion. - overflow_mask = _mm_adds_epu16(*acc_mid, mid); - *acc_mid = _mm_add_epi16(*acc_mid, mid); - - overflow_mask = _mm_cmpeq_epi16(*acc_mid, overflow_mask); - overflow_mask = _mm_cmpeq_epi16(overflow_mask, zero); - - // Finish up the accumulation of the... accumulator. - *acc_hi = _mm_add_epi16(*acc_hi, hi); - *acc_hi = _mm_sub_epi16(*acc_hi, overflow_mask); - - if (iw & 0x1) // VMACU - { - rsp_vec_t overflow_hi_mask = _mm_srai_epi16(*acc_hi, 15); - rsp_vec_t overflow_mid_mask = _mm_srai_epi16(*acc_mid, 15); - mid = _mm_or_si128(overflow_mid_mask, *acc_mid); - overflow_mask = _mm_cmpgt_epi16(*acc_hi, zero); - mid = _mm_andnot_si128(overflow_hi_mask, mid); - return _mm_or_si128(overflow_mask, mid); - } - else // VMACF - { - return sclamp_acc_to_mid(*acc_mid, *acc_hi); - } -} |