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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 ();
Previous: Paired-Single Built-in Functions, Up: MIPS Loongson Built-in Functions [Contents][Index]