diff options
Diffstat (limited to 'sysdeps/sparc')
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile | 3 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S | 57 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S | 19 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S | 53 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S | 12 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S | 64 | ||||
-rw-r--r-- | sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S | 56 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/Makefile | 3 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S | 53 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S | 12 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S | 52 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S | 12 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/s_trunc.S | 55 | ||||
-rw-r--r-- | sysdeps/sparc/sparc64/fpu/s_truncf.S | 54 |
14 files changed, 503 insertions, 2 deletions
diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile index aecd93bbef..0d92813d7b 100644 --- a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile @@ -8,7 +8,8 @@ libm-sysdep_routines += m_copysignf-vis3 m_copysign-vis3 s_ceilf-vis3 \ s_rintf-vis3 s_rint-vis3 w_sqrt-vis3 w_sqrtf-vis3 \ s_fminf-vis3 s_fmin-vis3 s_fmaxf-vis3 s_fmax-vis3 \ s_fmaf-vis3 s_fma-vis3 s_fdimf-vis3 s_fdim-vis3 \ - s_nearbyint-vis3 s_nearbyintf-vis3 + s_nearbyint-vis3 s_nearbyintf-vis3 s_truncf-vis3 \ + s_trunc-vis3 sysdep_routines += s_copysignf-vis3 s_copysign-vis3 endif endif diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S new file mode 100644 index 0000000000..72ec2826e7 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc-vis3.S @@ -0,0 +1,57 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc32 v9 vis3 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_FIFTYTWO 0x43300000 /* 2**52 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__trunc_vis3) + sethi %hi(TWO_FIFTYTWO), %o2 + sllx %o0, 32, %o0 + or %o0, %o1, %o0 + fzero ZERO + movxtod %o0, %f0 + sllx %o2, 32, %o2 + fnegd ZERO, SIGN_BIT + movxtod %o2, %f16 + fabsd %f0, %f14 + fcmpd %fcc3, %f14, %f16 + fmovduge %fcc3, ZERO, %f14 + fand %f0, SIGN_BIT, SIGN_BIT + fdtox %f14, %f14 + fxtod %f14, %f14 + faddd %f0, ZERO, %f18 + fmovduge %fcc3, %f18, %f14 + retl + for %f14, SIGN_BIT, %f0 +END (__trunc_vis3) diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S new file mode 100644 index 0000000000..3787fa1f11 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_trunc.S @@ -0,0 +1,19 @@ +#include <sparc-ifunc.h> +#include <math_ldbl_opt.h> + +SPARC_ASM_VIS3_IFUNC(trunc) + +weak_alias (__trunc, trunc) + +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) +compat_symbol (libm, __trunc, truncl, GLIBC_2_1) +#endif + +# undef weak_alias +# define weak_alias(a, b) +# undef compat_symbol +# define compat_symbol(a, b, c, d) + +#define __trunc __trunc_generic + +#include "../s_trunc.S" diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S new file mode 100644 index 0000000000..60445dfaa5 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf-vis3.S @@ -0,0 +1,53 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc32 v9 vis3 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__truncf_vis3) + movwtos %o0, %f1 + sethi %hi(TWO_TWENTYTHREE), %o2 + fzeros ZERO + fnegs ZERO, SIGN_BIT + movwtos %o2, %f16 + fabss %f1, %f14 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f14 + fands %f1, SIGN_BIT, SIGN_BIT + fstoi %f14, %f14 + fitos %f14, %f14 + fadds %f1, ZERO, %f18 + fmovsuge %fcc3, %f18, %f14 + retl + fors %f14, SIGN_BIT, %f0 +END (__truncf_vis3) diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S new file mode 100644 index 0000000000..2ca2517334 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_truncf.S @@ -0,0 +1,12 @@ +#include <sparc-ifunc.h> + +SPARC_ASM_VIS3_IFUNC(truncf) + +weak_alias (__truncf, truncf) + +# undef weak_alias +# define weak_alias(a, b) + +#define __truncf __truncf_generic + +#include "../s_truncf.S" diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S b/sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S new file mode 100644 index 0000000000..c451d1d995 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/s_trunc.S @@ -0,0 +1,64 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc32 v9 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_FIFTYTWO 0x43300000 /* 2**52 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__trunc) + sethi %hi(TWO_FIFTYTWO), %o2 + sllx %o0, 32, %o0 + or %o0, %o1, %o0 + fzero ZERO + stx %o0, [%sp + 72] + sllx %o2, 32, %o2 + fnegd ZERO, SIGN_BIT + ldd [%sp + 72], %f0 + stx %o2, [%sp + 72] + fabsd %f0, %f14 + ldd [%sp + 72], %f16 + fcmpd %fcc3, %f14, %f16 + fmovduge %fcc3, ZERO, %f14 + fand %f0, SIGN_BIT, SIGN_BIT + fdtox %f14, %f14 + fxtod %f14, %f14 + faddd %f0, ZERO, %f18 + fmovduge %fcc3, %f18, %f14 + retl + for %f14, SIGN_BIT, %f0 +END (__trunc) +weak_alias (__trunc, trunc) + +#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1) +compat_symbol (libm, __trunc, truncl, GLIBC_2_1) +#endif diff --git a/sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S b/sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S new file mode 100644 index 0000000000..4e6e25b263 --- /dev/null +++ b/sysdeps/sparc/sparc32/sparcv9/fpu/s_truncf.S @@ -0,0 +1,56 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc32 v9 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__truncf) + st %o0, [%sp + 68] + sethi %hi(TWO_TWENTYTHREE), %o2 + fzeros ZERO + ld [%sp + 68], %f1 + fnegs ZERO, SIGN_BIT + st %o2, [%sp + 68] + fabss %f1, %f14 + ld [%sp + 68], %f16 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f14 + fands %f1, SIGN_BIT, SIGN_BIT + fstoi %f14, %f14 + fitos %f14, %f14 + fadds %f1, ZERO, %f18 + fmovsuge %fcc3, %f18, %f14 + retl + fors %f14, SIGN_BIT, %f0 +END (__truncf) +weak_alias (__truncf, truncf) diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile index eff225ea4e..6a9274b4fa 100644 --- a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile +++ b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile @@ -9,7 +9,8 @@ libm-sysdep_routines += m_signbitf-vis3 m_signbit-vis3 s_ceilf-vis3 \ s_lrintf-vis3 s_lrint-vis3 s_rintf-vis3 \ s_rint-vis3 s_fminf-vis3 s_fmin-vis3 \ s_fmaxf-vis3 s_fmax-vis3 s_fmaf-vis3 \ - s_fma-vis3 s_nearbyint-vis3 s_nearbyintf-vis3 + s_fma-vis3 s_nearbyint-vis3 s_nearbyintf-vis3 \ + s_truncf-vis3 s_trunc-vis3 sysdep_routines += s_signbitf-vis3 s_signbit-vis3 s_finitef-vis3 \ s_finite-vis3 s_isinff-vis3 s_isinf-vis3 \ s_isnanf-vis3 s_isnan-vis3 diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S new file mode 100644 index 0000000000..34ff42da83 --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-vis3.S @@ -0,0 +1,53 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc64 vis3 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_FIFTYTWO 0x43300000 /* 2**52 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__trunc_vis3) + sethi %hi(TWO_FIFTYTWO), %o2 + sllx %o2, 32, %o2 + fzero ZERO + fnegd ZERO, SIGN_BIT + movxtod %o2, %f16 + fabsd %f0, %f14 + fcmpd %fcc3, %f14, %f16 + fmovduge %fcc3, ZERO, %f14 + fand %f0, SIGN_BIT, SIGN_BIT + fdtox %f14, %f14 + fxtod %f14, %f14 + faddd %f0, ZERO, %f18 + fmovduge %fcc3, %f18, %f14 + retl + for %f14, SIGN_BIT, %f0 +END (__trunc_vis3) diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S new file mode 100644 index 0000000000..0d6f43a189 --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.S @@ -0,0 +1,12 @@ +#include <sparc-ifunc.h> + +SPARC_ASM_VIS3_IFUNC(trunc) + +weak_alias (__trunc, trunc) + +# undef weak_alias +# define weak_alias(a, b) + +#define __trunc __trunc_generic + +#include "../s_trunc.S" diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S new file mode 100644 index 0000000000..e566b6ba82 --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-vis3.S @@ -0,0 +1,52 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc64 vis3 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__truncf_vis3) + sethi %hi(TWO_TWENTYTHREE), %o2 + fzeros ZERO + fnegs ZERO, SIGN_BIT + movwtos %o2,%f16 + fabss %f1, %f14 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f14 + fands %f1, SIGN_BIT, SIGN_BIT + fstoi %f14, %f14 + fitos %f14, %f14 + fadds %f1, ZERO, %f18 + fmovsuge %fcc3, %f18, %f14 + retl + fors %f14, SIGN_BIT, %f0 +END (__truncf_vis3) diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S new file mode 100644 index 0000000000..2ca2517334 --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.S @@ -0,0 +1,12 @@ +#include <sparc-ifunc.h> + +SPARC_ASM_VIS3_IFUNC(truncf) + +weak_alias (__truncf, truncf) + +# undef weak_alias +# define weak_alias(a, b) + +#define __truncf __truncf_generic + +#include "../s_truncf.S" diff --git a/sysdeps/sparc/sparc64/fpu/s_trunc.S b/sysdeps/sparc/sparc64/fpu/s_trunc.S new file mode 100644 index 0000000000..13d47eb97b --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/s_trunc.S @@ -0,0 +1,55 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc64 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_FIFTYTWO 0x43300000 /* 2**52 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__trunc) + sethi %hi(TWO_FIFTYTWO), %o2 + sllx %o2, 32, %o2 + fzero ZERO + fnegd ZERO, SIGN_BIT + stx %o2, [%sp + STACK_BIAS + 128] + fabsd %f0, %f14 + ldd [%sp + STACK_BIAS + 128], %f16 + fcmpd %fcc3, %f14, %f16 + fmovduge %fcc3, ZERO, %f14 + fand %f0, SIGN_BIT, SIGN_BIT + fdtox %f14, %f14 + fxtod %f14, %f14 + faddd %f0, ZERO, %f18 + fmovduge %fcc3, %f18, %f14 + retl + for %f14, SIGN_BIT, %f0 +END (__trunc) +weak_alias (__trunc, trunc) diff --git a/sysdeps/sparc/sparc64/fpu/s_truncf.S b/sysdeps/sparc/sparc64/fpu/s_truncf.S new file mode 100644 index 0000000000..e25a1f595e --- /dev/null +++ b/sysdeps/sparc/sparc64/fpu/s_truncf.S @@ -0,0 +1,54 @@ +/* Truncate argument to nearest integral value not larger than + the argument, sparc64 version. + + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David S. Miller <davem@davemloft.net>, 2013. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + /* We pop constants into the FPU registers using the incoming + argument stack slots, since this avoid having to use any PIC + references. We also thus avoid having to allocate a register + window. + + VIS instructions are used to facilitate the formation of + easier constants, and the propagation of the sign bit. */ + +#define TWO_TWENTYTHREE 0x4b000000 /* 2**23 */ + +#define ZERO %f10 /* 0.0 */ +#define SIGN_BIT %f12 /* -0.0 */ + +ENTRY (__truncf) + sethi %hi(TWO_TWENTYTHREE), %o2 + fzeros ZERO + fnegs ZERO, SIGN_BIT + st %o2, [%sp + STACK_BIAS + 128] + fabss %f1, %f14 + ld [%sp + STACK_BIAS + 128], %f16 + fcmps %fcc3, %f14, %f16 + fmovsuge %fcc3, ZERO, %f14 + fands %f1, SIGN_BIT, SIGN_BIT + fstoi %f14, %f14 + fitos %f14, %f14 + fadds %f1, ZERO, %f18 + fmovsuge %fcc3, %f18, %f14 + retl + fors %f14, SIGN_BIT, %f0 +END (__truncf) +weak_alias (__truncf, truncf) |