5.47.7.2 Paired-Single Built-in Functions
The following paired-single functions map directly to a particular MIPS instruction. Please refer to the architecture specification for details on what each instruction does.
-
v2sf __builtin_mips_pll_ps (v2sf, v2sf)
- Pair lower lower (
pll.ps
).
-
v2sf __builtin_mips_pul_ps (v2sf, v2sf)
- Pair upper lower (
pul.ps
).
-
v2sf __builtin_mips_plu_ps (v2sf, v2sf)
- Pair lower upper (
plu.ps
).
-
v2sf __builtin_mips_puu_ps (v2sf, v2sf)
- Pair upper upper (
puu.ps
).
-
v2sf __builtin_mips_cvt_ps_s (float, float)
- Convert pair to paired single (
cvt.ps.s
).
-
float __builtin_mips_cvt_s_pl (v2sf)
- Convert pair lower to single (
cvt.s.pl
).
-
float __builtin_mips_cvt_s_pu (v2sf)
- Convert pair upper to single (
cvt.s.pu
).
-
v2sf __builtin_mips_abs_ps (v2sf)
- Absolute value (
abs.ps
).
-
v2sf __builtin_mips_alnv_ps (v2sf, v2sf, int)
-
Align variable (
alnv.ps
).Note: The value of the third parameter must be 0 or 4 modulo 8, otherwise the result will be unpredictable. Please read the instruction description for details.
The following multi-instruction functions are also available. In each case, cond can be any of the 16 floating-point conditions: f
, un
, eq
, ueq
, olt
, ult
, ole
, ule
, sf
, ngle
, seq
, ngl
, lt
, nge
, le
or ngt
.
-
v2sf __builtin_mips_movt_c_
cond_ps (v2sf
a, v2sf
b, v2sf
c, v2sf
d)
-
v2sf __builtin_mips_movf_c_
cond_ps (v2sf
a, v2sf
b, v2sf
c, v2sf
d)
-
Conditional move based on floating point comparison (
c.
cond.ps
,movt.ps
/movf.ps
).The
movt
functions return the value x computed by:c.cond.ps cc,a,b mov.ps x,c movt.ps x,d,cc
The
movf
functions are similar but usemovf.ps
instead ofmovt.ps
.
-
int __builtin_mips_upper_c_
cond_ps (v2sf
a, v2sf
b)
-
int __builtin_mips_lower_c_
cond_ps (v2sf
a, v2sf
b)
-
Comparison of two paired-single values (
c.
cond.ps
,bc1t
/bc1f
).These functions compare a and b using
c.
cond.ps
and return either the upper or lower half of the result. For example:v2sf a, b; if (__builtin_mips_upper_c_eq_ps (a, b)) upper_halves_are_equal (); else upper_halves_are_unequal (); if (__builtin_mips_lower_c_eq_ps (a, b)) lower_halves_are_equal (); else lower_halves_are_unequal ();