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author Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
committer Miodrag Milanovic <mmicko@gmail.com>2015-09-13 08:41:44 +0200
commitf88cefad27a1737c76e09d99c9fb43e173506081 (patch)
tree2d8167d03579c46e226471747eb4407bd00ed6fa /src/devices/cpu/rsp/vabs.h
parente92ac9e0fa8e99869894bea00589bbb526be30aa (diff)
Move all devices into separate part of src tree (nw)
Diffstat (limited to 'src/devices/cpu/rsp/vabs.h')
-rw-r--r--src/devices/cpu/rsp/vabs.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/devices/cpu/rsp/vabs.h b/src/devices/cpu/rsp/vabs.h
new file mode 100644
index 00000000000..273841b9610
--- /dev/null
+++ b/src/devices/cpu/rsp/vabs.h
@@ -0,0 +1,15 @@
+// license:BSD-3-Clause
+// copyright-holders:Tyler J. Stachecki,Ryan Holtz
+
+inline rsp_vec_t vec_vabs(rsp_vec_t vs, rsp_vec_t vt, rsp_vec_t zero, rsp_vec_t *acc_lo)
+{
+ rsp_vec_t vs_zero = _mm_cmpeq_epi16(vs, zero);
+ rsp_vec_t sign_lt = _mm_srai_epi16(vs, 15);
+ rsp_vec_t vd = _mm_andnot_si128(vs_zero, vt);
+
+ // Careful: if VT = 0x8000 and VS is negative,
+ // acc_lo will be 0x8000 but vd will be 0x7FFF.
+ vd = _mm_xor_si128(vd, sign_lt);
+ *acc_lo = _mm_sub_epi16(vd, sign_lt);
+ return _mm_subs_epi16(vd, sign_lt);
+}