The MIPS-3D Application-Specific Extension (ASE) includes additional paired-single instructions that are designed to improve the performance of 3D graphics operations. Support for these instructions is controlled by the -mips3d command-line option.
The functions listed below map directly to a particular MIPS-3D instruction. Please refer to the architecture specification for more details on what each instruction does.
v2sf __builtin_mips_addr_ps (v2sf, v2sf)
Reduction add (addr.ps
).
v2sf __builtin_mips_mulr_ps (v2sf, v2sf)
Reduction multiply (mulr.ps
).
v2sf __builtin_mips_cvt_pw_ps (v2sf)
Convert paired single to paired word (cvt.pw.ps
).
v2sf __builtin_mips_cvt_ps_pw (v2sf)
Convert paired word to paired single (cvt.ps.pw
).
float __builtin_mips_recip1_s (float)
double __builtin_mips_recip1_d (double)
v2sf __builtin_mips_recip1_ps (v2sf)
Reduced-precision reciprocal (sequence step 1) (recip1.fmt
).
float __builtin_mips_recip2_s (float, float)
double __builtin_mips_recip2_d (double, double)
v2sf __builtin_mips_recip2_ps (v2sf, v2sf)
Reduced-precision reciprocal (sequence step 2) (recip2.fmt
).
float __builtin_mips_rsqrt1_s (float)
double __builtin_mips_rsqrt1_d (double)
v2sf __builtin_mips_rsqrt1_ps (v2sf)
Reduced-precision reciprocal square root (sequence step 1) (rsqrt1.fmt
).
float __builtin_mips_rsqrt2_s (float, float)
double __builtin_mips_rsqrt2_d (double, double)
v2sf __builtin_mips_rsqrt2_ps (v2sf, v2sf)
Reduced-precision reciprocal square root (sequence step 2) (rsqrt2.fmt
).
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
.
int __builtin_mips_cabs_cond_s (float a, float b)
int __builtin_mips_cabs_cond_d (double a, double b)
Absolute comparison of two scalar values (cabs.cond.fmt
, bc1t
/bc1f
).
These functions compare a and b using cabs.cond.s
or cabs.cond.d
and return the result as a boolean value. For example:
float a, b; if (__builtin_mips_cabs_eq_s (a, b)) true (); else false ();
int __builtin_mips_upper_cabs_cond_ps (v2sf a, v2sf b)
int __builtin_mips_lower_cabs_cond_ps (v2sf a, v2sf b)
Absolute comparison of two paired-single values (cabs.cond.ps
, bc1t
/bc1f
).
These functions compare a and b using cabs.cond.ps
and return either the upper or lower half of the result. For example:
v2sf a, b; if (__builtin_mips_upper_cabs_eq_ps (a, b)) upper_halves_are_equal (); else upper_halves_are_unequal (); if (__builtin_mips_lower_cabs_eq_ps (a, b)) lower_halves_are_equal (); else lower_halves_are_unequal ();
v2sf __builtin_mips_movt_cabs_cond_ps (v2sf a, v2sf b, v2sf c, v2sf d)
v2sf __builtin_mips_movf_cabs_cond_ps (v2sf a, v2sf b, v2sf c, v2sf d)
Conditional move based on absolute comparison (cabs.cond.ps
, movt.ps
/movf.ps
).
The movt
functions return the value x computed by:
cabs.cond.ps cc,a,b mov.ps x,c movt.ps x,d,cc
The movf
functions are similar but use movf.ps
instead of movt.ps
.
int __builtin_mips_any_c_cond_ps (v2sf a, v2sf b)
int __builtin_mips_all_c_cond_ps (v2sf a, v2sf b)
int __builtin_mips_any_cabs_cond_ps (v2sf a, v2sf b)
int __builtin_mips_all_cabs_cond_ps (v2sf a, v2sf b)
Comparison of two paired-single values (c.cond.ps
/cabs.cond.ps
, bc1any2t
/bc1any2f
).
These functions compare a and b using c.cond.ps
or cabs.cond.ps
. The any
forms return true if either result is true and the all
forms return true if both results are true. For example:
v2sf a, b; if (__builtin_mips_any_c_eq_ps (a, b)) one_is_true (); else both_are_false (); if (__builtin_mips_all_c_eq_ps (a, b)) both_are_true (); else one_is_false ();
int __builtin_mips_any_c_cond_4s (v2sf a, v2sf b, v2sf c, v2sf d)
int __builtin_mips_all_c_cond_4s (v2sf a, v2sf b, v2sf c, v2sf d)
int __builtin_mips_any_cabs_cond_4s (v2sf a, v2sf b, v2sf c, v2sf d)
int __builtin_mips_all_cabs_cond_4s (v2sf a, v2sf b, v2sf c, v2sf d)
Comparison of four paired-single values (c.cond.ps
/cabs.cond.ps
, bc1any4t
/bc1any4f
).
These functions use c.cond.ps
or cabs.cond.ps
to compare a with b and to compare c with d. The any
forms return true if any of the four results are true and the all
forms return true if all four results are true. For example:
v2sf a, b, c, d; if (__builtin_mips_any_c_eq_4s (a, b, c, d)) some_are_true (); else all_are_false (); if (__builtin_mips_all_c_eq_4s (a, b, c, d)) all_are_true (); else some_are_false ();
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