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| author | Ulrich Drepper <drepper@redhat.com> | 2001-02-19 09:09:18 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2001-02-19 09:09:18 +0000 |
| commit | 8da2915d5dcfa51cb5f9e55f7716b49858c1d59d (patch) | |
| tree | aa219472cc41fcb82789b12723628cb6a33cc774 /sysdeps/ia64/fpu/e_pow.S | |
| parent | e208f556cad11f729533385e46e4191fcc49aa0a (diff) | |
| download | glibc-8da2915d5dcfa51cb5f9e55f7716b49858c1d59d.tar.gz glibc-8da2915d5dcfa51cb5f9e55f7716b49858c1d59d.tar.xz glibc-8da2915d5dcfa51cb5f9e55f7716b49858c1d59d.zip | |
Update.
2001-02-19 Ulrich Drepper <drepper@redhat.com> * libio/iogetline.c: Move return until after last statement. * localedata/show-ucs-data.c: Don't show < > for better readability. * sysdeps/ia64/fpu/Dist: New file. * sysdeps/ia64/fpu/Makefile: New file. * sysdeps/ia64/fpu/Versions: New file. * sysdeps/ia64/fpu/e_acos.S: New file. * sysdeps/ia64/fpu/e_acosf.S: New file. * sysdeps/ia64/fpu/e_acosl.S: New file. * sysdeps/ia64/fpu/e_asin.S: New file. * sysdeps/ia64/fpu/e_asinf.S: New file. * sysdeps/ia64/fpu/e_asinl.S: New file. * sysdeps/ia64/fpu/e_atan2.S: New file. * sysdeps/ia64/fpu/e_atan2f.S: New file. * sysdeps/ia64/fpu/e_atan2l.c: New file. * sysdeps/ia64/fpu/e_cosh.S: New file. * sysdeps/ia64/fpu/e_coshf.S: New file. * sysdeps/ia64/fpu/e_coshl.S: New file. * sysdeps/ia64/fpu/e_exp.S: New file. * sysdeps/ia64/fpu/e_expf.S: New file. * sysdeps/ia64/fpu/e_expl.c: New file. * sysdeps/ia64/fpu/e_fmod.S: New file. * sysdeps/ia64/fpu/e_fmodf.S: New file. * sysdeps/ia64/fpu/e_fmodl.S: New file. * sysdeps/ia64/fpu/e_hypot.S: New file. * sysdeps/ia64/fpu/e_hypotf.S: New file. * sysdeps/ia64/fpu/e_hypotl.S: New file. * sysdeps/ia64/fpu/e_log.S: New file. * sysdeps/ia64/fpu/e_log10.c: New file. * sysdeps/ia64/fpu/e_log10f.c: New file. * sysdeps/ia64/fpu/e_log10l.c: New file. * sysdeps/ia64/fpu/e_logf.S: New file. * sysdeps/ia64/fpu/e_logl.c: New file. * sysdeps/ia64/fpu/e_pow.S: New file. * sysdeps/ia64/fpu/e_powf.S: New file. * sysdeps/ia64/fpu/e_powl.S: New file. * sysdeps/ia64/fpu/e_rem_pio2.c: New file. * sysdeps/ia64/fpu/e_rem_pio2f.c: New file. * sysdeps/ia64/fpu/e_remainder.S: New file. * sysdeps/ia64/fpu/e_remainderf.S: New file. * sysdeps/ia64/fpu/e_remainderl.S: New file. * sysdeps/ia64/fpu/e_scalb.S: New file. * sysdeps/ia64/fpu/e_scalbf.S: New file. * sysdeps/ia64/fpu/e_scalbl.S: New file. * sysdeps/ia64/fpu/e_sinh.S: New file. * sysdeps/ia64/fpu/e_sinhf.S: New file. * sysdeps/ia64/fpu/e_sinhl.S: New file. * sysdeps/ia64/fpu/e_sqrt.S: New file. * sysdeps/ia64/fpu/e_sqrtf.S: New file. * sysdeps/ia64/fpu/e_sqrtl.S: New file. * sysdeps/ia64/fpu/k_rem_pio2.c: New file. * sysdeps/ia64/fpu/k_rem_pio2f.c: New file. * sysdeps/ia64/fpu/k_rem_pio2l.c: New file. * sysdeps/ia64/fpu/libm_atan2_reg.S: New file. * sysdeps/ia64/fpu/libm_error.c: New file. * sysdeps/ia64/fpu/libm_frexp4.S: New file. * sysdeps/ia64/fpu/libm_frexp4f.S: New file. * sysdeps/ia64/fpu/libm_frexp4l.S: New file. * sysdeps/ia64/fpu/libm_reduce.S: New file. * sysdeps/ia64/fpu/libm_support.h: New file. * sysdeps/ia64/fpu/libm_tan.S: New file. * sysdeps/ia64/fpu/s_atan.S: New file. * sysdeps/ia64/fpu/s_atanf.S: New file. * sysdeps/ia64/fpu/s_atanl.S: New file. * sysdeps/ia64/fpu/s_cbrt.S: New file. * sysdeps/ia64/fpu/s_cbrtf.S: New file. * sysdeps/ia64/fpu/s_cbrtl.S: New file. * sysdeps/ia64/fpu/s_ceil.S: New file. * sysdeps/ia64/fpu/s_ceilf.S: New file. * sysdeps/ia64/fpu/s_ceill.S: New file. * sysdeps/ia64/fpu/s_cos.S: New file. * sysdeps/ia64/fpu/s_cosf.S: New file. * sysdeps/ia64/fpu/s_cosl.S: New file. * sysdeps/ia64/fpu/s_expm1.S: New file. * sysdeps/ia64/fpu/s_expm1f.S: New file. * sysdeps/ia64/fpu/s_expm1l.S: New file. * sysdeps/ia64/fpu/s_floor.S: New file. * sysdeps/ia64/fpu/s_floorf.S: New file. * sysdeps/ia64/fpu/s_floorl.S: New file. * sysdeps/ia64/fpu/s_frexp.c: New file. * sysdeps/ia64/fpu/s_frexpf.c: New file. * sysdeps/ia64/fpu/s_frexpl.c: New file. * sysdeps/ia64/fpu/s_ilogb.S: New file. * sysdeps/ia64/fpu/s_ilogbf.S: New file. * sysdeps/ia64/fpu/s_ilogbl.S: New file. * sysdeps/ia64/fpu/s_ldexp.S: New file. * sysdeps/ia64/fpu/s_ldexpf.S: New file. * sysdeps/ia64/fpu/s_ldexpl.S: New file. * sysdeps/ia64/fpu/s_log1p.S: New file. * sysdeps/ia64/fpu/s_log1pf.S: New file. * sysdeps/ia64/fpu/s_log1pl.S: New file. * sysdeps/ia64/fpu/s_logb.S: New file. * sysdeps/ia64/fpu/s_logbf.S: New file. * sysdeps/ia64/fpu/s_logbl.S: New file. * sysdeps/ia64/fpu/s_matherrf.c: New file. * sysdeps/ia64/fpu/s_matherrl.c: New file. * sysdeps/ia64/fpu/s_modf.S: New file. * sysdeps/ia64/fpu/s_modff.S: New file. * sysdeps/ia64/fpu/s_modfl.S: New file. * sysdeps/ia64/fpu/s_nearbyint.S: New file. * sysdeps/ia64/fpu/s_nearbyintf.S: New file. * sysdeps/ia64/fpu/s_nearbyintl.S: New file. * sysdeps/ia64/fpu/s_rint.S: New file. * sysdeps/ia64/fpu/s_rintf.S: New file. * sysdeps/ia64/fpu/s_rintl.S: New file. * sysdeps/ia64/fpu/s_round.S: New file. * sysdeps/ia64/fpu/s_roundf.S: New file. * sysdeps/ia64/fpu/s_roundl.S: New file. * sysdeps/ia64/fpu/s_scalbn.S: New file. * sysdeps/ia64/fpu/s_scalbnf.S: New file. * sysdeps/ia64/fpu/s_scalbnl.S: New file. * sysdeps/ia64/fpu/s_significand.S: New file. * sysdeps/ia64/fpu/s_significandf.S: New file. * sysdeps/ia64/fpu/s_significandl.S: New file. * sysdeps/ia64/fpu/s_sin.c: New file. * sysdeps/ia64/fpu/s_sincos.c: New file. * sysdeps/ia64/fpu/s_sincosf.c: New file. * sysdeps/ia64/fpu/s_sincosl.c: New file. * sysdeps/ia64/fpu/s_sinf.c: New file. * sysdeps/ia64/fpu/s_sinl.c: New file. * sysdeps/ia64/fpu/s_tan.S: New file. * sysdeps/ia64/fpu/s_tanf.S: New file. * sysdeps/ia64/fpu/s_tanl.S: New file. * sysdeps/ia64/fpu/s_trunc.S: New file. * sysdeps/ia64/fpu/s_truncf.S: New file. * sysdeps/ia64/fpu/s_truncl.S: New file. * sysdeps/ia64/fpu/w_acos.c: New file. * sysdeps/ia64/fpu/w_acosf.c: New file. * sysdeps/ia64/fpu/w_acosl.c: New file. * sysdeps/ia64/fpu/w_asin.c: New file. * sysdeps/ia64/fpu/w_asinf.c: New file. * sysdeps/ia64/fpu/w_asinl.c: New file. * sysdeps/ia64/fpu/w_atan2.c: New file. * sysdeps/ia64/fpu/w_atan2f.c: New file. * sysdeps/ia64/fpu/w_atan2l.c: New file. * sysdeps/ia64/fpu/w_cosh.c: New file. * sysdeps/ia64/fpu/w_coshf.c: New file. * sysdeps/ia64/fpu/w_coshl.c: New file. * sysdeps/ia64/fpu/w_exp.c: New file. * sysdeps/ia64/fpu/w_expf.c: New file. * sysdeps/ia64/fpu/w_fmod.c: New file. * sysdeps/ia64/fpu/w_fmodf.c: New file. * sysdeps/ia64/fpu/w_fmodl.c: New file. * sysdeps/ia64/fpu/w_hypot.c: New file. * sysdeps/ia64/fpu/w_hypotf.c: New file. * sysdeps/ia64/fpu/w_hypotl.c: New file. * sysdeps/ia64/fpu/w_log.c: New file. * sysdeps/ia64/fpu/w_log10.c: New file. * sysdeps/ia64/fpu/w_log10f.c: New file. * sysdeps/ia64/fpu/w_log10l.c: New file. * sysdeps/ia64/fpu/w_logf.c: New file. * sysdeps/ia64/fpu/w_logl.c: New file. * sysdeps/ia64/fpu/w_pow.c: New file. * sysdeps/ia64/fpu/w_powf.c: New file. * sysdeps/ia64/fpu/w_powl.c: New file. * sysdeps/ia64/fpu/w_remainder.c: New file. * sysdeps/ia64/fpu/w_remainderf.c: New file. * sysdeps/ia64/fpu/w_remainderl.c: New file. * sysdeps/ia64/fpu/w_scalb.c: New file. * sysdeps/ia64/fpu/w_scalbf.c: New file. * sysdeps/ia64/fpu/w_scalbl.c: New file. * sysdeps/ia64/fpu/w_sqrt.c: New file. * sysdeps/ia64/fpu/w_sqrtf.c: New file. * sysdeps/ia64/fpu/w_sqrtl.c: New file. * sysdeps/ia64/fpu/libm-test-ulps: Adjust for long double implementation. * sysdeps/ia64/fpu/bits/mathdef.h: Correct float_t and double_t types. Change FP_ILOGBNAN for new implementation. * Verions.def: Add 2.2.3 versions.
Diffstat (limited to 'sysdeps/ia64/fpu/e_pow.S')
| -rw-r--r-- | sysdeps/ia64/fpu/e_pow.S | 2309 |
1 files changed, 2309 insertions, 0 deletions
diff --git a/sysdeps/ia64/fpu/e_pow.S b/sysdeps/ia64/fpu/e_pow.S new file mode 100644 index 0000000000..acc3ed8371 --- /dev/null +++ b/sysdeps/ia64/fpu/e_pow.S @@ -0,0 +1,2309 @@ +.file "pow.s" + +// Copyright (c) 2000, 2001, Intel Corporation +// All rights reserved. +// +// Contributed 2/2/2000 by John Harrison, Ted Kubaska, Bob Norin, Shane Story, +// and Ping Tak Peter Tang of the Computational Software Lab, Intel Corporation. +// +// WARRANTY DISCLAIMER +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS +// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY +// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING +// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +// +// Intel Corporation is the author of this code, and requests that all +// problem reports or change requests be submitted to it directly at +// http://developer.intel.com/opensource. +// +// History +//============================================================== +// 2/02/00 Initial version +// 2/03/00 Added p12 to definite over/under path. With odd power we did not +// maintain the sign of x in this path. +// 4/04/00 Unwind support added +// 4/19/00 pow(+-1,inf) now returns NaN +// pow(+-val, +-inf) returns 0 or inf, but now does not call error support +// Added s1 to fcvt.fx because invalid flag was incorrectly set. +// 8/15/00 Bundle added after call to __libm_error_support to properly +// set [the previously overwritten] GR_Parameter_RESULT. +// 9/07/00 Improved performance by eliminating bank conflicts and other stalls, +// and tweaking the critical path +// 9/08/00 Per c99, pow(+-1,inf) now returns 1, and pow(+1,nan) returns 1 +// 9/28/00 Updated NaN**0 path +// 1/20/01 Fixed denormal flag settings. +// 2/12/01 Improved speed. +// +// API +//============================================================== +// double pow(double) +// float powf(float) +// +// Overview of operation +//============================================================== +// +// Three steps... +// 1. Log(x) +// 2. y Log(x) +// 3. exp(y log(x)) +// +// This means we work with the absolute value of x and merge in the sign later. +// Log(x) = G + delta + r -rsq/2 + p +// G,delta depend on the exponent of x and table entries. The table entries are +// indexed by the exponent of x, called K. +// +// The G and delta come out of the reduction; r is the reduced x. +// +// B = frcpa(x) +// xB-1 is small means that B is the approximate inverse of x. +// +// Log(x) = Log( (1/B)(Bx) ) +// = Log(1/B) + Log(Bx) +// = Log(1/B) + Log( 1 + (Bx-1)) +// +// x = 2^K 1.x_1x_2.....x_52 +// B= frcpa(x) = 2^-k Cm +// Log(1/B) = Log(1/(2^-K Cm)) +// Log(1/B) = Log((2^K/ Cm)) +// Log(1/B) = K Log(2) + Log(1/Cm) +// +// Log(x) = K Log(2) + Log(1/Cm) + Log( 1 + (Bx-1)) +// +// If you take the significand of x, set the exponent to true 0, then Cm is +// the frcpa. We tabulate the Log(1/Cm) values. There are 256 of them. +// The frcpa table is indexed by 8 bits, the x_1 thru x_8. +// m = x_1x_2...x_8 is an 8-bit index. +// +// Log(1/Cm) = log(1/frcpa(1+m/256)) where m goes from 0 to 255. +// +// We tabluate as two doubles, T and t, where T +t is the value itself. +// +// Log(x) = (K Log(2)_hi + T) + (Log(2)_hi + t) + Log( 1 + (Bx-1)) +// Log(x) = G + delta + Log( 1 + (Bx-1)) +// +// The Log( 1 + (Bx-1)) can be calculated as a series in r = Bx-1. +// +// Log( 1 + (Bx-1)) = r - rsq/2 + p +// +// Then, +// +// yLog(x) = yG + y delta + y(r-rsq/2) + yp +// yLog(x) = Z1 + e3 + Z2 + Z3 + (e2 + e3) +// +// +// exp(yLog(x)) = exp(Z1 + Z2 + Z3) exp(e1 + e2 + e3) +// +// +// exp(Z3) is another series. +// exp(e1 + e2 + e3) is approximated as f3 = 1 + (e1 + e2 + e3) +// +// Z1 (128/log2) = number of log2/128 in Z1 is N1 +// Z2 (128/log2) = number of log2/128 in Z2 is N2 +// +// s1 = Z1 - N1 log2/128 +// s2 = Z2 - N2 log2/128 +// +// s = s1 + s2 +// N = N1 + N2 +// +// exp(Z1 + Z2) = exp(Z) +// exp(Z) = exp(s) exp(N log2/128) +// +// exp(r) = exp(Z - N log2/128) +// +// r = s + d = (Z - N (log2/128)_hi) -N (log2/128)_lo +// = Z - N (log2/128) +// +// Z = s+d +N (log2/128) +// +// exp(Z) = exp(s) (1+d) exp(N log2/128) +// +// N = M 128 + n +// +// N log2/128 = M log2 + n log2/128 +// +// n is 8 binary digits = n_7n_6...n_1 +// +// n log2/128 = n_7n_6n_5 16 log2/128 + n_4n_3n_2n_1 log2/128 +// n log2/128 = n_7n_6n_5 log2/8 + n_4n_3n_2n_1 log2/128 +// n log2/128 = I2 log2/8 + I1 log2/128 +// +// N log2/128 = M log2 + I2 log2/8 + I1 log2/128 +// +// exp(Z) = exp(s) (1+d) exp(log(2^M) + log(2^I2/8) + log(2^I1/128)) +// exp(Z) = exp(s) (1+d1) (1+d2)(2^M) 2^I2/8 2^I1/128 +// exp(Z) = exp(s) f1 f2 (2^M) 2^I2/8 2^I1/128 +// +// I1, I2 are table indices. Use a series for exp(s). +// Then get exp(Z) +// +// exp(yLog(x)) = exp(Z1 + Z2 + Z3) exp(e1 + e2 + e3) +// exp(yLog(x)) = exp(Z) exp(Z3) f3 +// exp(yLog(x)) = exp(Z)f3 exp(Z3) +// exp(yLog(x)) = A exp(Z3) +// +// We actually calculate exp(Z3) -1. +// Then, +// exp(yLog(x)) = A + A( exp(Z3) -1) +// + +// Table Generation +//============================================================== + +// The log values +// ============== +// The operation (K*log2_hi) must be exact. K is the true exponent of x. +// If we allow gradual underflow (denormals), K can be represented in 12 bits +// (as a two's complement number). We assume 13 bits as an engineering precaution. +// +// +------------+----------------+-+ +// | 13 bits | 50 bits | | +// +------------+----------------+-+ +// 0 1 66 +// 2 34 +// +// So we want the lsb(log2_hi) to be 2^-50 +// We get log2 as a quad-extended (15-bit exponent, 128-bit significand) +// +// 0 fffe b17217f7d1cf79ab c9e3b39803f2f6af (4...) +// +// Consider numbering the bits left to right, starting at 0 thru 127. +// Bit 0 is the 2^-1 bit; bit 49 is the 2^-50 bit. +// +// ...79ab +// 0111 1001 1010 1011 +// 44 +// 89 +// +// So if we shift off the rightmost 14 bits, then (shift back only +// the top half) we get +// +// 0 fffe b17217f7d1cf4000 e6af278ece600fcb dabc000000000000 +// +// Put the right 64-bit signficand in an FR register, convert to double; +// it is exact. Put the next 128 bits into a quad register and round to double. +// The true exponent of the low part is -51. +// +// hi is 0 fffe b17217f7d1cf4000 +// lo is 0 ffcc e6af278ece601000 +// +// Convert to double memory format and get +// +// hi is 0x3fe62e42fefa39e8 +// lo is 0x3cccd5e4f1d9cc02 +// +// log2_hi + log2_lo is an accurate value for log2. +// +// +// The T and t values +// ================== +// A similar method is used to generate the T and t values. +// +// K * log2_hi + T must be exact. +// +// Smallest T,t +// ---------- +// The smallest T,t is +// T t +// data8 0x3f60040155d58800, 0x3c93bce0ce3ddd81 log(1/frcpa(1+0/256))= +1.95503e-003 +// +// The exponent is 0x3f6 (biased) or -9 (true). +// For the smallest T value, what we want is to clip the significand such that +// when it is shifted right by 9, its lsb is in the bit for 2^-51. The 9 is the specific +// for the first entry. In general, it is 0xffff - (biased 15-bit exponent). + +// Independently, what we have calculated is the table value as a quad precision number. +// Table entry 1 is +// 0 fff6 80200aaeac44ef38 338f77605fdf8000 +// +// We store this quad precision number in a data structure that is +// sign: 1 +// exponent: 15 +// signficand_hi: 64 (includes explicit bit) +// signficand_lo: 49 +// Because the explicit bit is included, the significand is 113 bits. +// +// Consider significand_hi for table entry 1. +// +// +// +-+--- ... -------+--------------------+ +// | | +// +-+--- ... -------+--------------------+ +// 0 1 4444444455555555556666 +// 2345678901234567890123 +// +// Labeled as above, bit 0 is 2^0, bit 1 is 2^-1, etc. +// Bit 42 is 2^-42. If we shift to the right by 9, the bit in +// bit 42 goes in 51. +// +// So what we want to do is shift bits 43 thru 63 into significand_lo. +// This is shifting bit 42 into bit 63, taking care to retain the shifted-off bits. +// Then shifting (just with signficaand_hi) back into bit 42. +// +// The shift_value is 63-42 = 21. In general, this is +// 63 - (51 -(0xffff - 0xfff6)) +// For this example, it is +// 63 - (51 - 9) = 63 - 42 = 21 +// +// This means we are shifting 21 bits into significand_lo. We must maintain more +// that a 128-bit signficand not to lose bits. So before the shift we put the 128-bit +// significand into a 256-bit signficand and then shift. +// The 256-bit significand has four parts: hh, hl, lh, and ll. +// +// Start off with +// hh hl lh ll +// <64> <49><15_0> <64_0> <64_0> +// +// After shift by 21 (then return for significand_hi), +// <43><21_0> <21><43> <6><58_0> <64_0> +// +// Take the hh part and convert to a double. There is no rounding here. +// The conversion is exact. The true exponent of the high part is the same as the +// true exponent of the input quad. +// +// We have some 64 plus significand bits for the low part. In this example, we have +// 70 bits. We want to round this to a double. Put them in a quad and then do a quad fnorm. +// For this example the true exponent of the low part is +// true_exponent_of_high - 43 = true_exponent_of_high - (64-21) +// In general, this is +// true_exponent_of_high - (64 - shift_value) +// +// +// Largest T,t +// ---------- +// The largest T,t is +// data8 0x3fe62643fecf9742, 0x3c9e3147684bd37d log(1/frcpa(1+255/256))= +6.92171e-001 +// +// Table entry 256 is +// 0 fffe b1321ff67cba178c 51da12f4df5a0000 +// +// The shift value is +// 63 - (51 -(0xffff - 0xfffe)) = 13 +// +// The true exponent of the low part is +// true_exponent_of_high - (64 - shift_value) +// -1 - (64-13) = -52 +// Biased as a double, this is 0x3cb +// +// +// +// So then lsb(T) must be >= 2^-51 +// msb(Klog2_hi) <= 2^12 +// +// +--------+---------+ +// | 51 bits | <== largest T +// +--------+---------+ +// | 9 bits | 42 bits | <== smallest T +// +------------+----------------+-+ +// | 13 bits | 50 bits | | +// +------------+----------------+-+ + + + +// Special Cases +//============================================================== + +// double float +// overflow error 24 30 + +// underflow error 25 31 + +// X zero Y zero +// +0 +0 +1 error 26 32 +// -0 +0 +1 error 26 32 +// +0 -0 +1 error 26 32 +// -0 -0 +1 error 26 32 + +// X zero Y negative +// +0 -odd integer +inf error 27 33 divide-by-zero +// -0 -odd integer -inf error 27 33 divide-by-zero +// +0 !-odd integer +inf error 27 33 divide-by-zero +// -0 !-odd integer +inf error 27 33 divide-by-zero +// +0 -inf +inf error 27 33 divide-by-zero +// -0 -inf +inf error 27 33 divide-by-zero + +// X zero Y positve +// +0 +odd integer +0 +// -0 +odd integer -0 +// +0 !+odd integer +0 +// -0 !+odd integer +0 +// +0 +inf +0 +// -0 +inf +0 +// +0 Y NaN quiet Y invalid if Y SNaN +// -0 Y NaN quiet Y invalid if Y SNaN + +// X one +// -1 Y inf +1 +// -1 Y NaN quiet Y invalid if Y SNaN +// +1 Y NaN +1 invalid if Y SNaN +// +1 Y any else +1 + +// X - Y not integer QNAN error 28 34 invalid + +// X NaN Y 0 +1 error 29 35 +// X NaN Y NaN quiet X invalid if X or Y SNaN +// X NaN Y any else quiet X invalid if X SNaN +// X !+1 Y NaN quiet Y invalid if Y SNaN + + +// X +inf Y >0 +inf +// X -inf Y >0, !odd integer +inf +// X -inf Y >0, odd integer -inf + +// X +inf Y <0 +0 +// X -inf Y <0, !odd integer +0 +// X -inf Y <0, odd integer -0 + +// X +inf Y =0 +1 +// X -inf Y =0 +1 + +// |X|<1 Y +inf +0 +// |X|<1 Y -inf +inf +// |X|>1 Y +inf +inf +// |X|>1 Y -inf +0 + +// X any Y =0 +1 + +#include "libm_support.h" + +// Assembly macros +//============================================================== + +// integer registers used + +pow_AD_Tt = r33 +pow_GR_FFF7 = r34 +pow_GR_exp_Y = r34 // duplicate +pow_GR_17ones = r35 + +pow_AD_P = r36 +pow_AD_Q = r37 +pow_AD_tbl1 = r38 +pow_AD_tbl2 = r39 +pow_GR_exp_X = r40 +pow_GR_true_exp_X = r40 // duplicate + +pow_GR_offset = r41 +pow_GR_exp_Xm1 = r42 +pow_GR_sig_X = r43 +pow_GR_signexp_X = r44 + +pow_GR_signexp_Xm1 = r46 +pow_GR_int_W1 = r47 +pow_GR_int_W2 = r48 +pow_GR_int_N = r49 +pow_GR_index1 = r50 + +pow_GR_index2 = r51 +pow_AD_T1 = r52 +pow_AD_T2 = r53 +pow_GR_gt_ln = r53 // duplicate +pow_int_GR_M = r54 +pow_GR_10033 = r55 + +pow_GR_16ones = r56 +pow_GR_sig_int_Y = r57 +pow_GR_sign_Y_Gpr = r58 +pow_GR_17ones_m1 = r59 +pow_GR_one = r60 +pow_GR_sign_Y = r60 + +pow_GR_signexp_Y_Gpr = r61 +pow_GR_exp_Y_Gpr = r62 +pow_GR_true_exp_Y_Gpr = r63 +pow_GR_signexp_Y = r64 + +GR_SAVE_B0 = r65 +GR_SAVE_GP = r66 +GR_SAVE_PFS = r67 + +GR_Parameter_X = r68 +GR_Parameter_Y = r69 +GR_Parameter_RESULT = r70 +pow_GR_tag = r71 + + +// floating point registers used + +POW_B = f32 +POW_NORM_X = f33 +POW_Xm1 = f34 +POW_r1 = f34 +POW_P4 = f35 + +POW_P5 = f36 +POW_NORM_Y = f37 +POW_Q2 = f38 +POW_Q3 = f39 +POW_P2 = f40 + +POW_P3 = f41 +POW_P0 = f42 +POW_log2_lo = f43 +POW_r = f44 +POW_Q0_half = f45 + +POW_Q1 = f46 +POW_log2_hi = f48 +POW_Q4 = f49 +POW_P1 = f50 + +POW_log2_by_128_hi = f51 +POW_inv_log2_by_128 = f52 +POW_rsq = f53 +POW_Yrcub = f54 +POW_log2_by_128_lo = f55 + +POW_v6 = f56 +POW_v4 = f58 +POW_v2 = f59 +POW_T = f60 + +POW_Tt = f61 +POW_RSHF = f62 +POW_v21ps = f63 +POW_s4 = f64 + +POW_U = f66 +POW_G = f67 +POW_delta = f68 +POW_v3 = f69 +POW_V = f70 + +POW_p = f71 +POW_Z1 = f72 +POW_e3 = f73 +POW_e2 = f74 +POW_Z2 = f75 + +POW_e1 = f76 +POW_W1 = f77 +POW_UmZ2 = f78 +POW_W2 = f79 +POW_Z3 = f80 + +POW_int_W1 = f81 +POW_e12 = f82 +POW_int_W2 = f83 +POW_UmZ2pV = f84 +POW_Z3sq = f85 + +POW_e123 = f86 +POW_N1float = f87 +POW_N2float = f88 +POW_f3 = f89 +POW_q = f90 + +POW_s1 = f91 +POW_Nfloat = f92 +POW_s2 = f93 +POW_f2 = f94 +POW_f1 = f95 + +POW_T1 = f96 +POW_T2 = f97 +POW_2M = f98 +POW_s = f99 +POW_f12 = f100 + +POW_ssq = f101 +POW_T1T2 = f102 +POW_1ps = f103 +POW_A = f104 +POW_es = f105 + +POW_int_K = f107 +POW_K = f108 +POW_f123 = f109 +POW_Gpr = f110 + +POW_Y_Gpr = f111 +POW_int_Y = f112 + +POW_float_int_Y = f116 +POW_ftz_urm_f8 = f117 +POW_wre_urm_f8 = f118 +POW_abs_A = f119 +POW_gt_pln = f120 + +POW_xsq = f121 + +POW_twoV = f122 +POW_Xp1 = f123 + +// Data tables +//============================================================== + +#ifdef _LIBC +.rodata +#else +.data +#endif + +.align 16 + +pow_table_P: +ASM_TYPE_DIRECTIVE(pow_table_P,@object) +data8 0x8000F7B249FF332D, 0x0000BFFC // P_5 +data8 0xAAAAAAA9E7902C7F, 0x0000BFFC // P_3 +data8 0x80000000000018E5, 0x0000BFFD // P_1 +data8 0xb8aa3b295c17f0bc, 0x00004006 // inv_ln2_by_128 + + +data8 0x3FA5555555554A9E // Q_2 +data8 0x3F8111124F4DD9F9 // Q_3 +data8 0x3FE0000000000000 // Q_0 +data8 0x3FC5555555554733 // Q_1 +data8 0x3F56C16D9360FFA0 // Q_4 +data8 0x43e8000000000000 // Right shift constant for exp +data8 0xc9e3b39803f2f6af, 0x00003fb7 // ln2_by_128_lo +data8 0x0000000000000000 // pad to eliminate bank conflicts with pow_table_Q +data8 0x0000000000000000 // pad to eliminate bank conflicts with pow_table_Q +ASM_SIZE_DIRECTIVE(pow_table_P) + +pow_table_Q: +ASM_TYPE_DIRECTIVE(pow_table_Q,@object) +data8 0x9249FE7F0DC423CF, 0x00003FFC // P_4 +data8 0xCCCCCCCC4ED2BA7F, 0x00003FFC // P_2 +data8 0xAAAAAAAAAAAAB505, 0x00003FFD // P_0 +data8 0x3fe62e42fefa39e8, 0x3cccd5e4f1d9cc02 // log2 hi lo = +6.93147e-001 +data8 0xb17217f7d1cf79ab, 0x00003ff7 // ln2_by_128_hi +ASM_SIZE_DIRECTIVE(pow_table_Q) + + +pow_Tt: +ASM_TYPE_DIRECTIVE(pow_Tt,@object) +data8 0x3f60040155d58800, 0x3c93bce0ce3ddd81 // log(1/frcpa(1+0/256))= +1.95503e-003 +data8 0x3f78121214586a00, 0x3cb540e0a5cfc9bc // log(1/frcpa(1+1/256))= +5.87661e-003 +data8 0x3f841929f9683200, 0x3cbdf1d57404da1f // log(1/frcpa(1+2/256))= +9.81362e-003 +data8 0x3f8c317384c75f00, 0x3c69806208c04c22 // log(1/frcpa(1+3/256))= +1.37662e-002 +data8 0x3f91a6b91ac73380, 0x3c7874daa716eb32 // log(1/frcpa(1+4/256))= +1.72376e-002 +data8 0x3f95ba9a5d9ac000, 0x3cacbb84e08d78ac // log(1/frcpa(1+5/256))= +2.12196e-002 +data8 0x3f99d2a807432580, 0x3cbcf80538b441e1 // log(1/frcpa(1+6/256))= +2.52177e-002 +data8 0x3f9d6b2725979800, 0x3c6095e5c8f8f359 // log(1/frcpa(1+7/256))= +2.87291e-002 +data8 0x3fa0c58fa19dfa80, 0x3cb4c5d4e9d0dda2 // log(1/frcpa(1+8/256))= +3.27573e-002 +data8 0x3fa2954c78cbce00, 0x3caa932b860ab8d6 // log(1/frcpa(1+9/256))= +3.62953e-002 +data8 0x3fa4a94d2da96c40, 0x3ca670452b76bbd5 // log(1/frcpa(1+10/256))= +4.03542e-002 +data8 0x3fa67c94f2d4bb40, 0x3ca84104f9941798 // log(1/frcpa(1+11/256))= +4.39192e-002 +data8 0x3fa85188b630f040, 0x3cb40a882cbf0153 // log(1/frcpa(1+12/256))= +4.74971e-002 +data8 0x3faa6b8abe73af40, 0x3c988d46e25c9059 // log(1/frcpa(1+13/256))= +5.16017e-002 +data8 0x3fac441e06f72a80, 0x3cae3e930a1a2a96 // log(1/frcpa(1+14/256))= +5.52072e-002 +data8 0x3fae1e6713606d00, 0x3c8a796f6283b580 // log(1/frcpa(1+15/256))= +5.88257e-002 +data8 0x3faffa6911ab9300, 0x3c5193070351e88a // log(1/frcpa(1+16/256))= +6.24574e-002 +data8 0x3fb0ec139c5da600, 0x3c623f2a75eb992d // log(1/frcpa(1+17/256))= +6.61022e-002 +data8 0x3fb1dbd2643d1900, 0x3ca649b2ef8927f0 // log(1/frcpa(1+18/256))= +6.97605e-002 +data8 0x3fb2cc7284fe5f00, 0x3cbc5e86599513e2 // log(1/frcpa(1+19/256))= +7.34321e-002 +data8 0x3fb3bdf5a7d1ee60, 0x3c90bd4bb69dada3 // log(1/frcpa(1+20/256))= +7.71173e-002 +data8 0x3fb4b05d7aa012e0, 0x3c54e377c9b8a54f // log(1/frcpa(1+21/256))= +8.08161e-002 +data8 0x3fb580db7ceb5700, 0x3c7fdb2f98354cde // log(1/frcpa(1+22/256))= +8.39975e-002 +data8 0x3fb674f089365a60, 0x3cb9994c9d3301c1 // log(1/frcpa(1+23/256))= +8.77219e-002 +data8 0x3fb769ef2c6b5680, 0x3caaec639db52a79 // log(1/frcpa(1+24/256))= +9.14602e-002 +data8 0x3fb85fd927506a40, 0x3c9f9f99a3cf8e25 // log(1/frcpa(1+25/256))= +9.52125e-002 +data8 0x3fb9335e5d594980, 0x3ca15c3abd47d99a // log(1/frcpa(1+26/256))= +9.84401e-002 +data8 0x3fba2b0220c8e5e0, 0x3cb4ca639adf6fc3 // log(1/frcpa(1+27/256))= +1.02219e-001 +data8 0x3fbb0004ac1a86a0, 0x3ca7cb81bf959a59 // log(1/frcpa(1+28/256))= +1.05469e-001 +data8 0x3fbbf968769fca00, 0x3cb0c646c121418e // log(1/frcpa(1+29/256))= +1.09274e-001 +data8 0x3fbccfedbfee13a0, 0x3ca0465fce24ab4b // log(1/frcpa(1+30/256))= +1.12548e-001 +data8 0x3fbda727638446a0, 0x3c82803f4e2e6603 // log(1/frcpa(1+31/256))= +1.15832e-001 +data8 0x3fbea3257fe10f60, 0x3cb986a3f2313d1a // log(1/frcpa(1+32/256))= +1.19677e-001 +data8 0x3fbf7be9fedbfde0, 0x3c97d16a6a621cf4 // log(1/frcpa(1+33/256))= +1.22985e-001 +data8 0x3fc02ab352ff25f0, 0x3c9cc6baad365600 // log(1/frcpa(1+34/256))= +1.26303e-001 +data8 0x3fc097ce579d2040, 0x3cb9ba16d329440b // log(1/frcpa(1+35/256))= +1.29633e-001 +data8 0x3fc1178e8227e470, 0x3cb7bc671683f8e6 // log(1/frcpa(1+36/256))= +1.33531e-001 +data8 0x3fc185747dbecf30, 0x3c9d1116f66d2345 // log(1/frcpa(1+37/256))= +1.36885e-001 +data8 0x3fc1f3b925f25d40, 0x3c8162c9ef939ac6 // log(1/frcpa(1+38/256))= +1.40250e-001 +data8 0x3fc2625d1e6ddf50, 0x3caad3a1ec384fc3 // log(1/frcpa(1+39/256))= +1.43627e-001 +data8 0x3fc2d1610c868130, 0x3cb3ad997036941b // log(1/frcpa(1+40/256))= +1.47015e-001 +data8 0x3fc340c597411420, 0x3cbc2308262c7998 // log(1/frcpa(1+41/256))= +1.50414e-001 +data8 0x3fc3b08b6757f2a0, 0x3cb2170d6cdf0526 // log(1/frcpa(1+42/256))= +1.53825e-001 +data8 0x3fc40dfb08378000, 0x3c9bb453c4f7b685 // log(1/frcpa(1+43/256))= +1.56677e-001 +data8 0x3fc47e74e8ca5f70, 0x3cb836a48fdfce9d // log(1/frcpa(1+44/256))= +1.60109e-001 +data8 0x3fc4ef51f6466de0, 0x3ca07a43919aa64b // log(1/frcpa(1+45/256))= +1.63553e-001 +data8 0x3fc56092e02ba510, 0x3ca85006899d97b0 // log(1/frcpa(1+46/256))= +1.67010e-001 +data8 0x3fc5d23857cd74d0, 0x3ca30a5ba6e7abbe // log(1/frcpa(1+47/256))= +1.70478e-001 +data8 0x3fc6313a37335d70, 0x3ca905586f0ac97e // log(1/frcpa(1+48/256))= +1.73377e-001 +data8 0x3fc6a399dabbd380, 0x3c9b2c6657a96684 // log(1/frcpa(1+49/256))= +1.76868e-001 +data8 0x3fc70337dd3ce410, 0x3cb50bc52f55cdd8 // log(1/frcpa(1+50/256))= +1.79786e-001 +data8 0x3fc77654128f6120, 0x3cad2eb7c9a39efe // log(1/frcpa(1+51/256))= +1.83299e-001 +data8 0x3fc7e9d82a0b0220, 0x3cba127e90393c01 // log(1/frcpa(1+52/256))= +1.86824e-001 +data8 0x3fc84a6b759f5120, 0x3cbd7fd52079f706 // log(1/frcpa(1+53/256))= +1.89771e-001 +data8 0x3fc8ab47d5f5a300, 0x3cbfae141751a3de // log(1/frcpa(1+54/256))= +1.92727e-001 +data8 0x3fc91fe490965810, 0x3cb69cf30a1c319e // log(1/frcpa(1+55/256))= +1.96286e-001 +data8 0x3fc981634011aa70, 0x3ca5bb3d208bc42a // log(1/frcpa(1+56/256))= +1.99261e-001 +data8 0x3fc9f6c407089660, 0x3ca04d68658179a0 // log(1/frcpa(1+57/256))= +2.02843e-001 +data8 0x3fca58e729348f40, 0x3c99f5411546c286 // log(1/frcpa(1+58/256))= +2.05838e-001 +data8 0x3fcabb55c31693a0, 0x3cb9a5350eb327d5 // log(1/frcpa(1+59/256))= +2.08842e-001 +data8 0x3fcb1e104919efd0, 0x3c18965fcce7c406 // log(1/frcpa(1+60/256))= +2.11855e-001 +data8 0x3fcb94ee93e367c0, 0x3cb503716da45184 // log(1/frcpa(1+61/256))= +2.15483e-001 +data8 0x3fcbf851c0675550, 0x3cbdf1b3f7ab5378 // log(1/frcpa(1+62/256))= +2.18516e-001 +data8 0x3fcc5c0254bf23a0, 0x3ca7aab9ed0b1d7b // log(1/frcpa(1+63/256))= +2.21558e-001 +data8 0x3fccc000c9db3c50, 0x3c92a7a2a850072a // log(1/frcpa(1+64/256))= +2.24609e-001 +data8 0x3fcd244d99c85670, 0x3c9f6019120edf4c // log(1/frcpa(1+65/256))= +2.27670e-001 +data8 0x3fcd88e93fb2f450, 0x3c6affb96815e081 // log(1/frcpa(1+66/256))= +2.30741e-001 +data8 0x3fcdedd437eaef00, 0x3c72553595897976 // log(1/frcpa(1+67/256))= +2.33820e-001 +data8 0x3fce530effe71010, 0x3c90913b020fa182 // log(1/frcpa(1+68/256))= +2.36910e-001 +data8 0x3fceb89a1648b970, 0x3c837ba4045bfd25 // log(1/frcpa(1+69/256))= +2.40009e-001 +data8 0x3fcf1e75fadf9bd0, 0x3cbcea6d13e0498d // log(1/frcpa(1+70/256))= +2.43117e-001 +data8 0x3fcf84a32ead7c30, 0x3ca5e3a67b3c6d77 // log(1/frcpa(1+71/256))= +2.46235e-001 +data8 0x3fcfeb2233ea07c0, 0x3cba0c6f0049c5a6 // log(1/frcpa(1+72/256))= +2.49363e-001 +data8 0x3fd028f9c7035c18, 0x3cb0a30b06677ff6 // log(1/frcpa(1+73/256))= +2.52501e-001 +data8 0x3fd05c8be0d96358, 0x3ca0f1c77ccb5865 // log(1/frcpa(1+74/256))= +2.55649e-001 +data8 0x3fd085eb8f8ae790, 0x3cbd513f45fe7a97 // log(1/frcpa(1+75/256))= +2.58174e-001 +data8 0x3fd0b9c8e32d1910, 0x3c927449047ca006 // log(1/frcpa(1+76/256))= +2.61339e-001 +data8 0x3fd0edd060b78080, 0x3c89b52d8435f53e // log(1/frcpa(1+77/256))= +2.64515e-001 +data8 0x3fd122024cf00638, 0x3cbdd976fabda4bd // log(1/frcpa(1+78/256))= +2.67701e-001 +data8 0x3fd14be2927aecd0, 0x3cb02f90ad0bc471 // log(1/frcpa(1+79/256))= +2.70257e-001 +data8 0x3fd180618ef18ad8, 0x3cbd003792c71a98 // log(1/frcpa(1+80/256))= +2.73461e-001 +data8 0x3fd1b50bbe2fc638, 0x3ca9ae64c6403ead // log(1/frcpa(1+81/256))= +2.76675e-001 +data8 0x3fd1df4cc7cf2428, 0x3cb43f0455f7e395 // log(1/frcpa(1+82/256))= +2.79254e-001 +data8 0x3fd214456d0eb8d0, 0x3cb0fbd748d75d30 // log(1/frcpa(1+83/256))= +2.82487e-001 +data8 0x3fd23ec5991eba48, 0x3c906edd746b77e2 // log(1/frcpa(1+84/256))= +2.85081e-001 +data8 0x3fd2740d9f870af8, 0x3ca9802e6a00a670 // log(1/frcpa(1+85/256))= +2.88333e-001 +data8 0x3fd29ecdabcdfa00, 0x3cacecef70890cfa // log(1/frcpa(1+86/256))= +2.90943e-001 +data8 0x3fd2d46602adcce8, 0x3cb97911955f3521 // log(1/frcpa(1+87/256))= +2.94214e-001 +data8 0x3fd2ff66b04ea9d0, 0x3cb12dabe191d1c9 // log(1/frcpa(1+88/256))= +2.96838e-001 +data8 0x3fd335504b355a30, 0x3cbdf9139df924ec // log(1/frcpa(1+89/256))= +3.00129e-001 +data8 0x3fd360925ec44f58, 0x3cb253e68977a1e3 // log(1/frcpa(1+90/256))= +3.02769e-001 +data8 0x3fd38bf1c3337e70, 0x3cb3d283d2a2da21 // log(1/frcpa(1+91/256))= +3.05417e-001 +data8 0x3fd3c25277333180, 0x3cadaa5b035eae27 // log(1/frcpa(1+92/256))= +3.08735e-001 +data8 0x3fd3edf463c16838, 0x3cb983d680d3c108 // log(1/frcpa(1+93/256))= +3.11399e-001 +data8 0x3fd419b423d5e8c0, 0x3cbc86dd921c139d // log(1/frcpa(1+94/256))= +3.14069e-001 +data8 0x3fd44591e0539f48, 0x3c86a76d6dc2782e // log(1/frcpa(1+95/256))= +3.16746e-001 +data8 0x3fd47c9175b6f0a8, 0x3cb59a2e013c6b5f // log(1/frcpa(1+96/256))= +3.20103e-001 +data8 0x3fd4a8b341552b08, 0x3c93f1e86e468694 // log(1/frcpa(1+97/256))= +3.22797e-001 +data8 0x3fd4d4f390890198, 0x3cbf5e4ea7c5105a // log(1/frcpa(1+98/256))= +3.25498e-001 +data8 0x3fd501528da1f960, 0x3cbf58da53e9ad10 // log(1/frcpa(1+99/256))= +3.28206e-001 +data8 0x3fd52dd06347d4f0, 0x3cb98a28cebf6eef // log(1/frcpa(1+100/256))= +3.30921e-001 +data8 0x3fd55a6d3c7b8a88, 0x3c9c76b67c2d1fd4 // log(1/frcpa(1+101/256))= +3.33644e-001 +data8 0x3fd5925d2b112a58, 0x3c9029616a4331b8 // log(1/frcpa(1+102/256))= +3.37058e-001 +data8 0x3fd5bf406b543db0, 0x3c9fb8292ecfc820 // log(1/frcpa(1+103/256))= +3.39798e-001 +data8 0x3fd5ec433d5c35a8, 0x3cb71a1229d17eec // log(1/frcpa(1+104/256))= +3.42545e-001 +data8 0x3fd61965cdb02c18, 0x3cbba94fe1dbb8d2 // log(1/frcpa(1+105/256))= +3.45300e-001 +data8 0x3fd646a84935b2a0, 0x3c9ee496d2c9ae57 // log(1/frcpa(1+106/256))= +3.48063e-001 +data8 0x3fd6740add31de90, 0x3cb1da3a6c7a9dfd // log(1/frcpa(1+107/256))= +3.50833e-001 +data8 0x3fd6a18db74a58c0, 0x3cb494c257add8dc // log(1/frcpa(1+108/256))= +3.53610e-001 +data8 0x3fd6cf31058670e8, 0x3cb0b244a70a8da9 // log(1/frcpa(1+109/256))= +3.56396e-001 +data8 0x3fd6f180e852f0b8, 0x3c9db7aefa866720 // log(1/frcpa(1+110/256))= +3.58490e-001 +data8 0x3fd71f5d71b894e8, 0x3cbe91c4bf324957 // log(1/frcpa(1+111/256))= +3.61289e-001 +data8 0x3fd74d5aefd66d58, 0x3cb06b3d9bfac023 // log(1/frcpa(1+112/256))= +3.64096e-001 +data8 0x3fd77b79922bd378, 0x3cb727d8804491f4 // log(1/frcpa(1+113/256))= +3.66911e-001 +data8 0x3fd7a9b9889f19e0, 0x3ca2ef22df5bc543 // log(1/frcpa(1+114/256))= +3.69734e-001 +data8 0x3fd7d81b037eb6a0, 0x3cb8fd3ba07a7ece // log(1/frcpa(1+115/256))= +3.72565e-001 +data8 0x3fd8069e33827230, 0x3c8bd1e25866e61a // log(1/frcpa(1+116/256))= +3.75404e-001 +data8 0x3fd82996d3ef8bc8, 0x3ca5aab9f5928928 // log(1/frcpa(1+117/256))= +3.77538e-001 +data8 0x3fd85855776dcbf8, 0x3ca56f33337789d6 // log(1/frcpa(1+118/256))= +3.80391e-001 +data8 0x3fd8873658327cc8, 0x3cbb8ef0401db49d // log(1/frcpa(1+119/256))= +3.83253e-001 +data8 0x3fd8aa75973ab8c8, 0x3cbb9961f509a680 // log(1/frcpa(1+120/256))= +3.85404e-001 +data8 0x3fd8d992dc8824e0, 0x3cb220512a53732d // log(1/frcpa(1+121/256))= +3.88280e-001 +data8 0x3fd908d2ea7d9510, 0x3c985f0e513bfb5c // log(1/frcpa(1+122/256))= +3.91164e-001 +data8 0x3fd92c59e79c0e50, 0x3cb82e073fd30d63 // log(1/frcpa(1+123/256))= +3.93332e-001 +data8 0x3fd95bd750ee3ed0, 0x3ca4aa7cdb6dd8a8 // log(1/frcpa(1+124/256))= +3.96231e-001 +data8 0x3fd98b7811a3ee58, 0x3caa93a5b660893e // log(1/frcpa(1+125/256))= +3.99138e-001 +data8 0x3fd9af47f33d4068, 0x3cac294b3b3190ba // log(1/frcpa(1+126/256))= +4.01323e-001 +data8 0x3fd9df270c1914a0, 0x3cbe1a58fd0cd67e // log(1/frcpa(1+127/256))= +4.04245e-001 +data8 0x3fda0325ed14fda0, 0x3cb1efa7950fb57e // log(1/frcpa(1+128/256))= +4.06442e-001 +data8 0x3fda33440224fa78, 0x3c8915fe75e7d477 // log(1/frcpa(1+129/256))= +4.09379e-001 +data8 0x3fda57725e80c380, 0x3ca72bd1062b1b7f // log(1/frcpa(1+130/256))= +4.11587e-001 +data8 0x3fda87d0165dd198, 0x3c91f7845f58dbad // log(1/frcpa(1+131/256))= +4.14539e-001 +data8 0x3fdaac2e6c03f890, 0x3cb6f237a911c509 // log(1/frcpa(1+132/256))= +4.16759e-001 +data8 0x3fdadccc6fdf6a80, 0x3c90ddc4b7687169 // log(1/frcpa(1+133/256))= +4.19726e-001 +data8 0x3fdb015b3eb1e790, 0x3c692dd7d90e1e8e // log(1/frcpa(1+134/256))= +4.21958e-001 +data8 0x3fdb323a3a635948, 0x3c6f85655cbe14de // log(1/frcpa(1+135/256))= +4.24941e-001 +data8 0x3fdb56fa04462908, 0x3c95252d841994de // log(1/frcpa(1+136/256))= +4.27184e-001 +data8 0x3fdb881aa659bc90, 0x3caa53a745a3642f // log(1/frcpa(1+137/256))= +4.30182e-001 +data8 0x3fdbad0bef3db160, 0x3cb32f2540dcc16a // log(1/frcpa(1+138/256))= +4.32437e-001 +data8 0x3fdbd21297781c28, 0x3cbd8e891e106f1d // log(1/frcpa(1+139/256))= +4.34697e-001 +data8 0x3fdc039236f08818, 0x3c809435af522ba7 // log(1/frcpa(1+140/256))= +4.37718e-001 +data8 0x3fdc28cb1e4d32f8, 0x3cb3944752fbd81e // log(1/frcpa(1+141/256))= +4.39990e-001 +data8 0x3fdc4e19b84723c0, 0x3c9a465260cd3fe5 // log(1/frcpa(1+142/256))= +4.42267e-001 +data8 0x3fdc7ff9c74554c8, 0x3c92447d5b6ca369 // log(1/frcpa(1+143/256))= +4.45311e-001 +data8 0x3fdca57b64e9db00, 0x3cb44344a8a00c82 // log(1/frcpa(1+144/256))= +4.47600e-001 +data8 0x3fdccb130a5ceba8, 0x3cbefaddfb97b73f // log(1/frcpa(1+145/256))= +4.49895e-001 +data8 0x3fdcf0c0d18f3268, 0x3cbd3e7bfee57898 // log(1/frcpa(1+146/256))= +4.52194e-001 +data8 0x3fdd232075b5a200, 0x3c9222599987447c // log(1/frcpa(1+147/256))= +4.55269e-001 +data8 0x3fdd490246defa68, 0x3cabafe9a767a80d // log(1/frcpa(1+148/256))= +4.57581e-001 +data8 0x3fdd6efa918d25c8, 0x3cb58a2624e1c6fd // log(1/frcpa(1+149/256))= +4.59899e-001 +data8 0x3fdd9509707ae528, 0x3cbdc3babce578e7 // log(1/frcpa(1+150/256))= +4.62221e-001 +data8 0x3fddbb2efe92c550, 0x3cb0ac0943c434a4 // log(1/frcpa(1+151/256))= +4.64550e-001 +data8 0x3fddee2f3445e4a8, 0x3cbba9d07ce820e8 // log(1/frcpa(1+152/256))= +4.67663e-001 +data8 0x3fde148a1a2726c8, 0x3cb6537e3375b205 // log(1/frcpa(1+153/256))= +4.70004e-001 +data8 0x3fde3afc0a49ff38, 0x3cbfed5518dbc20e // log(1/frcpa(1+154/256))= +4.72350e-001 +data8 0x3fde6185206d5168, 0x3cb6572601f73d5c // log(1/frcpa(1+155/256))= +4.74702e-001 +data8 0x3fde882578823d50, 0x3c9b24abd4584d1a // log(1/frcpa(1+156/256))= +4.77060e-001 +data8 0x3fdeaedd2eac9908, 0x3cb0ceb5e4d2c8f7 // log(1/frcpa(1+157/256))= +4.79423e-001 +data8 0x3fded5ac5f436be0, 0x3ca72f21f1f5238e // log(1/frcpa(1+158/256))= +4.81792e-001 +data8 0x3fdefc9326d16ab8, 0x3c85081a1639a45c // log(1/frcpa(1+159/256))= +4.84166e-001 +data8 0x3fdf2391a21575f8, 0x3cbf11015bdd297a // log(1/frcpa(1+160/256))= +4.86546e-001 +data8 0x3fdf4aa7ee031928, 0x3cb3795bc052a2d1 // log(1/frcpa(1+161/256))= +4.88932e-001 +data8 0x3fdf71d627c30bb0, 0x3c35c61f0f5a88f3 // log(1/frcpa(1+162/256))= +4.91323e-001 +data8 0x3fdf991c6cb3b378, 0x3c97d99419be6028 // log(1/frcpa(1+163/256))= +4.93720e-001 +data8 0x3fdfc07ada69a908, 0x3cbfe9341ded70b1 // log(1/frcpa(1+164/256))= +4.96123e-001 +data8 0x3fdfe7f18eb03d38, 0x3cb85718a640c33f // log(1/frcpa(1+165/256))= +4.98532e-001 +data8 0x3fe007c053c5002c, 0x3cb3addc9c065f09 // log(1/frcpa(1+166/256))= +5.00946e-001 +data8 0x3fe01b942198a5a0, 0x3c9d5aa4c77da6ac // log(1/frcpa(1+167/256))= +5.03367e-001 +data8 0x3fe02f74400c64e8, 0x3cb5a0ee4450ef52 // log(1/frcpa(1+168/256))= +5.05793e-001 +data8 0x3fe04360be7603ac, 0x3c9dd00c35630fe0 // log(1/frcpa(1+169/256))= +5.08225e-001 +data8 0x3fe05759ac47fe30, 0x3cbd063e1f0bd82c // log(1/frcpa(1+170/256))= +5.10663e-001 +data8 0x3fe06b5f1911cf50, 0x3cae8da674af5289 // log(1/frcpa(1+171/256))= +5.13107e-001 +data8 0x3fe078bf0533c568, 0x3c62241edf5fd1f7 // log(1/frcpa(1+172/256))= +5.14740e-001 +data8 0x3fe08cd9687e7b0c, 0x3cb3007febcca227 // log(1/frcpa(1+173/256))= +5.17194e-001 +data8 0x3fe0a10074cf9018, 0x3ca496e84603816b // log(1/frcpa(1+174/256))= +5.19654e-001 +data8 0x3fe0b5343a234474, 0x3cb46098d14fc90a // log(1/frcpa(1+175/256))= +5.22120e-001 +data8 0x3fe0c974c89431cc, 0x3cac0a7cdcbb86c6 // log(1/frcpa(1+176/256))= +5.24592e-001 +data8 0x3fe0ddc2305b9884, 0x3cb2f753210410ff // log(1/frcpa(1+177/256))= +5.27070e-001 +data8 0x3fe0eb524bafc918, 0x3c88affd6682229e // log(1/frcpa(1+178/256))= +5.28726e-001 +data8 0x3fe0ffb54213a474, 0x3cadeefbab9af993 // log(1/frcpa(1+179/256))= +5.31214e-001 +data8 0x3fe114253da97d9c, 0x3cbaf1c2b8bc160a // log(1/frcpa(1+180/256))= +5.33709e-001 +data8 0x3fe128a24f1d9afc, 0x3cb9cf4df375e650 // log(1/frcpa(1+181/256))= +5.36210e-001 +data8 0x3fe1365252bf0864, 0x3c985a621d4be111 // log(1/frcpa(1+182/256))= +5.37881e-001 +data8 0x3fe14ae558b4a92c, 0x3ca104c4aa8977d1 // log(1/frcpa(1+183/256))= +5.40393e-001 +data8 0x3fe15f85a19c7658, 0x3cbadf26e540f375 // log(1/frcpa(1+184/256))= +5.42910e-001 +data8 0x3fe16d4d38c119f8, 0x3cb3aea11caec416 // log(1/frcpa(1+185/256))= +5.44592e-001 +data8 0x3fe18203c20dd130, 0x3cba82d1211d1d6d // log(1/frcpa(1+186/256))= +5.47121e-001 +data8 0x3fe196c7bc4b1f38, 0x3cb6267acc4f4f4a // log(1/frcpa(1+187/256))= +5.49656e-001 +data8 0x3fe1a4a738b7a33c, 0x3c858930213c987d // log(1/frcpa(1+188/256))= +5.51349e-001 +data8 0x3fe1b981c0c9653c, 0x3c9bc2a4a30f697b // log(1/frcpa(1+189/256))= +5.53895e-001 +data8 0x3fe1ce69e8bb1068, 0x3cb7ae6199cf2a00 // log(1/frcpa(1+190/256))= +5.56447e-001 +data8 0x3fe1dc619de06944, 0x3c6b50bb38388177 // log(1/frcpa(1+191/256))= +5.58152e-001 +data8 0x3fe1f160a2ad0da0, 0x3cbd05b2778a5e1d // log(1/frcpa(1+192/256))= +5.60715e-001 +data8 0x3fe2066d7740737c, 0x3cb32e828f9c6bd6 // log(1/frcpa(1+193/256))= +5.63285e-001 +data8 0x3fe2147dba47a390, 0x3cbd579851b8b672 // log(1/frcpa(1+194/256))= +5.65001e-001 +data8 0x3fe229a1bc5ebac0, 0x3cbb321be5237ce8 // log(1/frcpa(1+195/256))= +5.67582e-001 +data8 0x3fe237c1841a502c, 0x3cb3b56e0915ea64 // log(1/frcpa(1+196/256))= +5.69306e-001 +data8 0x3fe24cfce6f80d98, 0x3cb34a4d1a422919 // log(1/frcpa(1+197/256))= +5.71898e-001 +data8 0x3fe25b2c55cd5760, 0x3cb237401ea5015e // log(1/frcpa(1+198/256))= +5.73630e-001 +data8 0x3fe2707f4d5f7c40, 0x3c9d30f20acc8341 // log(1/frcpa(1+199/256))= +5.76233e-001 +data8 0x3fe285e0842ca380, 0x3cbc4d866d5f21c0 // log(1/frcpa(1+200/256))= +5.78842e-001 +data8 0x3fe294294708b770, 0x3cb85e14d5dc54fa // log(1/frcpa(1+201/256))= +5.80586e-001 +data8 0x3fe2a9a2670aff0c, 0x3c7e6f8f468bbf91 // log(1/frcpa(1+202/256))= +5.83207e-001 +data8 0x3fe2b7fb2c8d1cc0, 0x3c930ffcf63c8b65 // log(1/frcpa(1+203/256))= +5.84959e-001 +data8 0x3fe2c65a6395f5f4, 0x3ca0afe20b53d2d2 // log(1/frcpa(1+204/256))= +5.86713e-001 +data8 0x3fe2dbf557b0df40, 0x3cb646be1188fbc9 // log(1/frcpa(1+205/256))= +5.89350e-001 +data8 0x3fe2ea64c3f97654, 0x3c96516fa8df33b2 // log(1/frcpa(1+206/256))= +5.91113e-001 +data8 0x3fe3001823684d70, 0x3cb96d64e16d1360 // log(1/frcpa(1+207/256))= +5.93762e-001 +data8 0x3fe30e97e9a8b5cc, 0x3c98ef96bc97cca0 // log(1/frcpa(1+208/256))= +5.95531e-001 +data8 0x3fe32463ebdd34e8, 0x3caef1dc9a56c1bf // log(1/frcpa(1+209/256))= +5.98192e-001 +data8 0x3fe332f4314ad794, 0x3caa4f0ac5d5fa11 // log(1/frcpa(1+210/256))= +5.99970e-001 +data8 0x3fe348d90e7464cc, 0x3cbe7889f0516acd // log(1/frcpa(1+211/256))= +6.02643e-001 +data8 0x3fe35779f8c43d6c, 0x3ca96bbab7245411 // log(1/frcpa(1+212/256))= +6.04428e-001 +data8 0x3fe36621961a6a98, 0x3ca31f32262db9fb // log(1/frcpa(1+213/256))= +6.06217e-001 +data8 0x3fe37c299f3c3668, 0x3cb15c72c107ee29 // log(1/frcpa(1+214/256))= +6.08907e-001 +data8 0x3fe38ae2171976e4, 0x3cba42a2554b2dd4 // log(1/frcpa(1+215/256))= +6.10704e-001 +data8 0x3fe399a157a603e4, 0x3cb99c62286d8919 // log(1/frcpa(1+216/256))= +6.12504e-001 +data8 0x3fe3afccfe77b9d0, 0x3ca11048f96a43bd // log(1/frcpa(1+217/256))= +6.15210e-001 +data8 0x3fe3be9d503533b4, 0x3ca4022f47588c3e // log(1/frcpa(1+218/256))= +6.17018e-001 +data8 0x3fe3cd7480b4a8a0, 0x3cb4ba7afc2dc56a // log(1/frcpa(1+219/256))= +6.18830e-001 +data8 0x3fe3e3c43918f76c, 0x3c859673d064b8ba // log(1/frcpa(1+220/256))= +6.21554e-001 +data8 0x3fe3f2acb27ed6c4, 0x3cb55c6b452a16a8 // log(1/frcpa(1+221/256))= +6.23373e-001 +data8 0x3fe4019c2125ca90, 0x3cb8c367879c5a31 // log(1/frcpa(1+222/256))= +6.25197e-001 +data8 0x3fe4181061389720, 0x3cb2c17a79c5cc6c // log(1/frcpa(1+223/256))= +6.27937e-001 +data8 0x3fe42711518df544, 0x3ca5f38d47012fc5 // log(1/frcpa(1+224/256))= +6.29769e-001 +data8 0x3fe436194e12b6bc, 0x3cb9854d65a9b426 // log(1/frcpa(1+225/256))= +6.31604e-001 +data8 0x3fe445285d68ea68, 0x3ca3ff9b3a81cd81 // log(1/frcpa(1+226/256))= +6.33442e-001 +data8 0x3fe45bcc464c8938, 0x3cb0a2d8011a6c05 // log(1/frcpa(1+227/256))= +6.36206e-001 +data8 0x3fe46aed21f117fc, 0x3c8a2be41f8e9f3d // log(1/frcpa(1+228/256))= +6.38053e-001 +data8 0x3fe47a1527e8a2d0, 0x3cba4a83594fab09 // log(1/frcpa(1+229/256))= +6.39903e-001 +data8 0x3fe489445efffcc8, 0x3cbf306a23dcbcde // log(1/frcpa(1+230/256))= +6.41756e-001 +data8 0x3fe4a018bcb69834, 0x3ca46c9285029fd1 // log(1/frcpa(1+231/256))= +6.44543e-001 +data8 0x3fe4af5a0c9d65d4, 0x3cbbc1db897580e3 // log(1/frcpa(1+232/256))= +6.46405e-001 +data8 0x3fe4bea2a5bdbe84, 0x3cb84d880d7ef775 // log(1/frcpa(1+233/256))= +6.48271e-001 +data8 0x3fe4cdf28f10ac44, 0x3cb3ec4b7893ce1f // log(1/frcpa(1+234/256))= +6.50140e-001 +data8 0x3fe4dd49cf994058, 0x3c897224d59d3408 // log(1/frcpa(1+235/256))= +6.52013e-001 +data8 0x3fe4eca86e64a680, 0x3cbccf620f24f0cd // log(1/frcpa(1+236/256))= +6.53889e-001 +data8 0x3fe503c43cd8eb68, 0x3c3f872c65971084 // log(1/frcpa(1+237/256))= +6.56710e-001 +data8 0x3fe513356667fc54, 0x3cb9ca64cc3d52c8 // log(1/frcpa(1+238/256))= +6.58595e-001 +data8 0x3fe522ae0738a3d4, 0x3cbe708164c75968 // log(1/frcpa(1+239/256))= +6.60483e-001 +data8 0x3fe5322e26867854, 0x3cb9988ba4aea615 // log(1/frcpa(1+240/256))= +6.62376e-001 +data8 0x3fe541b5cb979808, 0x3ca1662e3a6b95f5 // log(1/frcpa(1+241/256))= +6.64271e-001 +data8 0x3fe55144fdbcbd60, 0x3cb3acd4ca45c1e0 // log(1/frcpa(1+242/256))= +6.66171e-001 +data8 0x3fe560dbc45153c4, 0x3cb4988947959fed // log(1/frcpa(1+243/256))= +6.68074e-001 +data8 0x3fe5707a26bb8c64, 0x3cb3017fe6607ba9 // log(1/frcpa(1+244/256))= +6.69980e-001 +data8 0x3fe587f60ed5b8fc, 0x3cbe7a3266366ed4 // log(1/frcpa(1+245/256))= +6.72847e-001 +data8 0x3fe597a7977c8f30, 0x3ca1e12b9959a90e // log(1/frcpa(1+246/256))= +6.74763e-001 +data8 0x3fe5a760d634bb88, 0x3cb7c365e53d9602 // log(1/frcpa(1+247/256))= +6.76682e-001 +data8 0x3fe5b721d295f10c, 0x3cb716c2551ccbf0 // log(1/frcpa(1+248/256))= +6.78605e-001 +data8 0x3fe5c6ea94431ef8, 0x3ca02b2ed0e28261 // log(1/frcpa(1+249/256))= +6.80532e-001 +data8 0x3fe5d6bb22ea86f4, 0x3caf43a8bbb2f974 // log(1/frcpa(1+250/256))= +6.82462e-001 +data8 0x3fe5e6938645d38c, 0x3cbcedc98821b333 // log(1/frcpa(1+251/256))= +6.84397e-001 +data8 0x3fe5f673c61a2ed0, 0x3caa385eef5f2789 // log(1/frcpa(1+252/256))= +6.86335e-001 +data8 0x3fe6065bea385924, 0x3cb11624f165c5b4 // log(1/frcpa(1+253/256))= +6.88276e-001 +data8 0x3fe6164bfa7cc068, 0x3cbad884f87073fa // log(1/frcpa(1+254/256))= +6.90222e-001 +data8 0x3fe62643fecf9740, 0x3cb78c51da12f4df // log(1/frcpa(1+255/256))= +6.92171e-001 +ASM_SIZE_DIRECTIVE(pow_Tt) + + +// Table 1 is 2^(index_1/128) where +// index_1 goes from 0 to 15 +pow_tbl1: +ASM_TYPE_DIRECTIVE(pow_tbl1,@object) +data8 0x8000000000000000 , 0x00003FFF +data8 0x80B1ED4FD999AB6C , 0x00003FFF +data8 0x8164D1F3BC030773 , 0x00003FFF +data8 0x8218AF4373FC25EC , 0x00003FFF +data8 0x82CD8698AC2BA1D7 , 0x00003FFF +data8 0x8383594EEFB6EE37 , 0x00003FFF +data8 0x843A28C3ACDE4046 , 0x00003FFF +data8 0x84F1F656379C1A29 , 0x00003FFF +data8 0x85AAC367CC487B15 , 0x00003FFF +data8 0x8664915B923FBA04 , 0x00003FFF +data8 0x871F61969E8D1010 , 0x00003FFF +data8 0x87DB357FF698D792 , 0x00003FFF +data8 0x88980E8092DA8527 , 0x00003FFF +data8 0x8955EE03618E5FDD , 0x00003FFF +data8 0x8A14D575496EFD9A , 0x00003FFF +data8 0x8AD4C6452C728924 , 0x00003FFF +ASM_SIZE_DIRECTIVE(pow_tbl1) + + +// Table 2 is 2^(index_1/8) where +// index_2 goes from 0 to 7 +pow_tbl2: +ASM_TYPE_DIRECTIVE(pow_tbl2,@object) +data8 0x8000000000000000 , 0x00003FFF +data8 0x8B95C1E3EA8BD6E7 , 0x00003FFF +data8 0x9837F0518DB8A96F , 0x00003FFF +data8 0xA5FED6A9B15138EA , 0x00003FFF +data8 0xB504F333F9DE6484 , 0x00003FFF +data8 0xC5672A115506DADD , 0x00003FFF +data8 0xD744FCCAD69D6AF4 , 0x00003FFF +data8 0xEAC0C6E7DD24392F , 0x00003FFF +ASM_SIZE_DIRECTIVE(pow_tbl2) + +.global pow + +.section .text +.proc pow +.align 32 + +pow: + +{ .mfi + alloc r32=ar.pfs,1,35,4,0 + fms.s1 POW_Xm1 = f8,f1,f1 // Will be used for r1 if x>0 + mov pow_GR_17ones = 0x1FFFF +} +{ .mfi +(p0) addl pow_AD_P = @ltoff(pow_table_P), gp + fma.s1 POW_Xp1 = f8,f1,f1 // Will be used for r1 if x<0 + nop.i 999 +;; +} + + +// Get exponent of x. Will be used to calculate K. +{ .mfi + getf.exp pow_GR_signexp_X = f8 + frcpa.s1 POW_B, p6 = f1,f8 + nop.i 999 +} +{ .mfi + ld8 pow_AD_P = [pow_AD_P] + fma.s1 POW_NORM_X = f8,f1,f0 + mov pow_GR_FFF7 = 0xFFF7 +} +;; + + + +// Get significand of x. Will be used to get index to fetch T, Tt. +// p13 = TRUE ==> X is unorm +// DOUBLE 0x10033 exponent limit at which y is an integer +// SINGLE 0x10016 +{ .mfi + getf.sig pow_GR_sig_X = f8 + fclass.m p13,p0 = f8, 0x0b // Test for x unorm + addl pow_GR_10033 = 0x10033, r0 +} +{ .mfi + mov pow_GR_16ones = 0xFFFF + fma.s1 POW_NORM_Y = f9,f1,f0 + nop.i 999 +} +;; + + +// p14 = TRUE ==> X is ZERO +{ .mfi + adds pow_AD_Tt = pow_Tt - pow_table_P, pow_AD_P + fclass.m p14,p15 = f8, 0x07 + and pow_GR_exp_X = pow_GR_signexp_X, pow_GR_17ones +} +{ .mfi + adds pow_AD_Q = pow_table_Q - pow_table_P, pow_AD_P + nop.f 999 + nop.i 999 +} +;; + +{ .mfi + ldfe POW_P5 = [pow_AD_P], 16 + fcmp.lt.s1 p8,p9 = f8, f0 // Test for x<0 + shl pow_GR_offset = pow_GR_sig_X, 1 +} +{ .mib + ldfe POW_P4 = [pow_AD_Q], 16 + sub pow_GR_true_exp_X = pow_GR_exp_X, pow_GR_16ones +(p13) br.cond.spnt L(POW_X_DENORM) +} +;; + + +// Continue normal and denormal paths here +L(POW_COMMON): +// p11 = TRUE ==> Y is a NAN +{ .mfi + ldfe POW_P3 = [pow_AD_P], 16 + fclass.m.unc p11,p0 = f9, 0xc3 + shr.u pow_GR_offset = pow_GR_offset,56 +} +{ .mfi + ldfe POW_P2 = [pow_AD_Q], 16 + nop.f 999 + nop.i 999 +} +;; + + + +// Compute xsq to decide later if |x|=1 +// p11 = TRUE ==> Y is a NaN +{ .mfi + setf.sig POW_int_K = pow_GR_true_exp_X +(p15) fms.s1 POW_r = POW_B, POW_NORM_X,f1 + shladd pow_AD_Tt = pow_GR_offset, 4, pow_AD_Tt +} +{ .mfi + nop.m 999 +(p8) fnma.s1 POW_Xm1 = POW_Xp1,f1,f0 + nop.i 999 +} +;; + + + +// p12 = TRUE ==> X is ZERO and Y is ZERO +{ .mfi + ldfe POW_P1 = [pow_AD_P], 16 +(p14) fclass.m.unc p12,p0 = f9, 0x07 + nop.i 999 +} +{ .mfb + ldfe POW_P0 = [pow_AD_Q], 16 + fma.s1 POW_xsq = POW_NORM_X, POW_NORM_X, f0 +(p11) br.cond.spnt L(POW_Y_NAN) +} +;; + + +.pred.rel "mutex",p8,p9 +// Get exponent of |x|-1 to use in comparison to 2^-8 +{ .mmf +(p8) getf.exp pow_GR_signexp_Xm1 = POW_Xp1 +(p9) getf.exp pow_GR_signexp_Xm1 = POW_Xm1 + fcvt.fx.s1 POW_int_Y = POW_NORM_Y +} +;; + + +// p11 = TRUE ==> X is a NAN +{ .mfi + ldfpd POW_log2_hi, POW_log2_lo = [pow_AD_Q], 16 + fclass.m.unc p11,p0 = f8, 0xc3 + nop.i 999 +} +{ .mib + ldfpd POW_T, POW_Tt = [pow_AD_Tt], 16 + nop.i 999 +(p12) br.cond.spnt L(POW_X_0_Y_0) +} +;; + + +// p14 = TRUE ==> X is zero +// p15 = TRUE ==> X is zero AND Y is negative +// p10 = TRUE ==> X is zero AND Y is >= zero +{ .mfi + ldfe POW_inv_log2_by_128 = [pow_AD_P], 16 +(p14) fcmp.lt.unc.s1 p15, p10 = f9,f0 + nop.i 999 +} +{ .mfi + nop.m 999 + nop.f 999 + and pow_GR_exp_Xm1 = pow_GR_signexp_Xm1, pow_GR_17ones +} +;; + + +// Determine if we will use the |x| near 1 path (p6) or normal path (p7) +// p12 = TRUE ==> X is a NAN and Y is a zero +// p13 = TRUE ==> X is a NAN and Y is anything else +{ .mfi + getf.exp pow_GR_signexp_Y = POW_NORM_Y +(p11) fclass.m.unc p12,p13 = f9, 0x07 + cmp.lt.unc p6,p7 = pow_GR_exp_Xm1, pow_GR_FFF7 +} +{ .mfi + ldfpd POW_Q2, POW_Q3 = [pow_AD_P], 16 + fma.s1 POW_rsq = POW_r, POW_r,f0 + nop.i 999 +;; +} + +// If on the x near 1 path, assign r1 to r and r1*r1 to rsq +{ .mfi + ldfpd POW_Q0_half, POW_Q1 = [pow_AD_P], 16 +(p6) fma.s1 POW_r = POW_r1, f1, f0 + nop.i 999 +} +{ .mfi + nop.m 999 +(p6) fma.s1 POW_rsq = POW_r1, POW_r1, f0 + nop.i 999 +;; +} + + +{ .mfi + ldfpd POW_Q4, POW_RSHF = [pow_AD_P], 16 +(p7) fma.s1 POW_v6 = POW_r, POW_P5, POW_P4 + and pow_GR_exp_Y = pow_GR_signexp_Y, pow_GR_17ones +} +{ .mfb + nop.m 999 +(p6) fma.s1 POW_v6 = POW_r1, POW_P5, POW_P4 +(p12) br.cond.spnt L(POW_X_NAN_Y_0) +} +;; + + +{ .mfi + nop.m 999 +(p7) fma.s1 POW_v4 = POW_P3, POW_r, POW_P2 + andcm pow_GR_sign_Y = pow_GR_signexp_Y, pow_GR_17ones +} +{ .mfb + nop.m 999 +(p6) fma.s1 POW_v4 = POW_P3, POW_r1, POW_P2 +(p12) br.cond.spnt L(POW_X_NAN_Y_0) +} +;; + +{ .mfi + nop.m 999 + fcvt.xf POW_K = POW_int_K + nop.i 999 +} +{ .mfb + nop.m 999 +(p13) fma.d f8 = f8,f1,f0 +(p13) br.ret.spnt b0 // Exit if x nan, y anything but zero +} +;; + +// p10 = TRUE ==> X is zero AND Y is positive +// p8 = TRUE ==> X is zero AND Y is outside integer range (treat as even int) +// return +0 +// p9 = TRUE ==> X is zero AND Y is within integer range (may not be integer) +{ .mfi +(p10) cmp.gt.unc p8,p9 = pow_GR_exp_Y, pow_GR_10033 +(p6) fmerge.s POW_delta = f0,f0 + nop.i 999 +} +{ .mfi + nop.m 999 +(p6) fma.s1 POW_G = f0,f0,f0 + nop.i 999 +} +;; + +{ .mfi + getf.sig pow_GR_sig_int_Y = POW_int_Y + fnma.s1 POW_twoV = POW_NORM_Y, POW_rsq,f0 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_U = POW_NORM_Y,POW_r,f0 + nop.i 999 +} +;; + +{ .mfi + ldfe POW_log2_by_128_lo = [pow_AD_P], 16 +(p6) fma.s1 POW_v2 = POW_P1, POW_r1, POW_P0 + nop.i 999 +} +{ .mfi + ldfe POW_log2_by_128_hi = [pow_AD_Q], 16 +(p7) fma.s1 POW_v2 = POW_P1, POW_r, POW_P0 + nop.i 999 +} +;; + + +{ .mfi + nop.m 999 + fcvt.xf POW_float_int_Y = POW_int_Y + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_v3 = POW_v6, POW_rsq, POW_v4 + adds pow_AD_tbl1 = pow_tbl1 - pow_Tt, pow_AD_Q +} +;; + +{ .mfi + nop.m 999 +(p7) fma.s1 POW_delta = POW_K, POW_log2_lo, POW_Tt + nop.i 999 +} +{ .mfi + nop.m 999 +(p7) fma.s1 POW_G = POW_K, POW_log2_hi, POW_T + adds pow_AD_tbl2 = pow_tbl2 - pow_tbl1, pow_AD_tbl1 +} +;; + + +{ .mfi + nop.m 999 + fms.s1 POW_e2 = POW_NORM_Y, POW_r, POW_U + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_Z2 = POW_twoV, POW_Q0_half, POW_U + nop.i 999 +} +;; + +// p11 = TRUE ==> X is NEGATIVE +// p8 = TRUE ==> X is zero AND Y is outside intger range (treat as even int) +// return +0 +{ .mfi + nop.m 999 + fclass.m.unc p11,p0 = f8, 0x1a + nop.i 999 +} +{ .mfb + nop.m 999 +(p8) fma.d f8 = f0,f0,f0 +(p8) br.ret.spnt b0 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_Yrcub = POW_rsq, POW_U, f0 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_p = POW_rsq, POW_v3, POW_v2 + nop.i 999 +} +;; + + +// p11 = TRUE ==> X is NEGATIVE +// p12 = TRUE ==> X is NEGATIVE AND Y already int +// p13 = TRUE ==> X is NEGATIVE AND Y possible int +{ .mfi + nop.m 999 + fma.s1 POW_Z1 = POW_NORM_Y, POW_G, f0 +(p11) cmp.ge.unc p12,p13 = pow_GR_exp_Y, pow_GR_10033 +} +{ .mfi + nop.m 999 + fma.s1 POW_e3 = POW_NORM_Y, POW_delta, f0 + nop.i 999 +} +;; + +// p9 = TRUE ==> X is zero AND Y is within integer range (may not be integer) +// p6 = TRUE ==> X is zero AND Y is an integer (may be even or odd) +// p7 = TRUE ==> X is zero AND Y is NOT an integer, return +0 +{ .mfi + nop.m 999 +(p9) fcmp.eq.unc.s1 p6,p7 = POW_float_int_Y, POW_NORM_Y + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_Gpr = POW_G, f1, POW_r + nop.i 999 +} +;; + +// By adding RSHF (1.1000...*2^63) we put integer part in rightmost significand +{ .mfi + nop.m 999 + fma.s1 POW_W2 = POW_Z2, POW_inv_log2_by_128, POW_RSHF + nop.i 999 +} +{ .mfi + nop.m 999 + fms.s1 POW_UmZ2 = POW_U, f1, POW_Z2 + nop.i 999 +} +;; + + +// If x=0 and y>0, test y and flag denormal +// p6 = TRUE ==> X is zero AND Y is an integer (may be even or odd) +// p8 = TRUE ==> X is zero AND Y is an odd integer +// p9 = TRUE ==> X is zero AND Y is an even integer +{ .mfi + nop.m 999 +(p10) fcmp.eq.s0 p15,p0 = f9,f0 +(p6) tbit.nz.unc p8,p9 = pow_GR_sig_int_Y,0 +} +{ .mfi + nop.m 999 + fma.s1 POW_Z3 = POW_p, POW_Yrcub, f0 + nop.i 999 +} +;; + +// By adding RSHF (1.1000...*2^63) we put integer part in rightmost significand +{ .mfi + nop.m 999 + fms.s1 POW_e1 = POW_NORM_Y, POW_G, POW_Z1 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_W1 = POW_Z1, POW_inv_log2_by_128, POW_RSHF + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p7) fma.d f8 = f0,f0,f0 // Result +0 if x zero and y not integer + nop.i 999 +} +{ .mfb + nop.m 999 + fma.s1 POW_Y_Gpr = POW_NORM_Y, POW_Gpr, f0 +(p8) br.ret.spnt b0 // Exit if x zero and y odd integer +} +;; + +// By subtracting RSHF we get rounded integer POW_N2float +// p15 = TRUE ==> X_0_Y_NEG +{ .mfi + nop.m 999 + fms.s1 POW_N2float = POW_W2, f1, POW_RSHF + nop.i 999 +} +{ .mfb + nop.m 999 + fma.s1 POW_UmZ2pV = POW_twoV,POW_Q0_half,POW_UmZ2 +(p15) br.cond.spnt L(POW_X_0_Y_NEG) +} +;; + + + +{ .mfi + nop.m 999 + fma.s1 POW_Z3sq = POW_Z3, POW_Z3, f0 + nop.i 999 +} +{ .mfb + nop.m 999 + fma.s1 POW_v4 = POW_Z3, POW_Q3, POW_Q2 +(p7) br.ret.spnt b0 // Exit if x zero and y not an integer +} +;; + + + +// Extract rounded integer from rightmost significand of POW_W2 +// By subtracting RSHF we get rounded integer POW_N1float +{ .mfi + getf.sig pow_GR_int_W2 = POW_W2 + fms.s1 POW_N1float = POW_W1, f1, POW_RSHF + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_v2 = POW_Z3, POW_Q1, POW_Q0_half + nop.i 999 +} +;; + + + + +// p13 = TRUE ==> X is NEGATIVE AND Y possible int +// p10 = TRUE ==> X is NEG and Y is an int +// p12 = TRUE ==> X is NEG and Y is not an int +{ .mfi + nop.m 999 +(p13) fcmp.eq.unc.s1 p10,p12 = POW_float_int_Y, POW_NORM_Y + nop.i 999 +} +{ .mfb + nop.m 999 +(p9) fma.d f8 = f0,f0,f0 // Result +0 if x zero and y even integer +(p9) br.ret.spnt b0 // Exit if x zero and y even integer +} +;; + + +{ .mfi + nop.m 999 + fnma.s1 POW_s2 = POW_N2float, POW_log2_by_128_hi, POW_Z2 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_e2 = POW_e2,f1,POW_UmZ2pV + nop.i 999 +} +;; + +// Extract rounded integer from rightmost significand of POW_W1 +// Test if x inf +{ .mfi + getf.sig pow_GR_int_W1 = POW_W1 + fclass.m.unc p15,p0 = POW_NORM_X, 0x23 + nop.i 999 +} +{ .mfb + nop.m 999 + fnma.s1 POW_f2 = POW_N2float, POW_log2_by_128_lo, f1 +(p12) br.cond.spnt L(POW_X_NEG_Y_NONINT) // Branch if x neg, y not integer +} +;; + +// p12 = TRUE ==> X is NEGATIVE AND Y is an odd integer +{ .mfi + getf.exp pow_GR_signexp_Y_Gpr = POW_Y_Gpr + fma.s1 POW_v3 = POW_Z3sq, POW_Q4, POW_v4 +(p10) tbit.nz.unc p12,p0 = pow_GR_sig_int_Y,0 +} +;; + + +{ .mfi + add pow_GR_int_N = pow_GR_int_W1, pow_GR_int_W2 + fnma.s1 POW_f1 = POW_N1float, POW_log2_by_128_lo, f1 + nop.i 999 +} +{ .mfb + nop.m 999 + fnma.s1 POW_s1 = POW_N1float, POW_log2_by_128_hi, POW_Z1 +(p15) br.cond.spnt L(POW_X_INF) +} +;; + + +// Test x and y and flag denormal +{ .mfi + and pow_GR_index1 = 0x0f, pow_GR_int_N + fcmp.eq.s0 p15,p0 = f8,f9 + shr r2 = pow_GR_int_N, 7 +} +{ .mfi + and pow_GR_exp_Y_Gpr = pow_GR_signexp_Y_Gpr, pow_GR_17ones + nop.f 999 + and pow_GR_index2 = 0x70, pow_GR_int_N +} +;; + + + +{ .mfi + shladd pow_AD_T1 = pow_GR_index1, 4, pow_AD_tbl1 + fcmp.eq.s1 p7,p0 = POW_NORM_Y, f1 // Test for y=1.0 + sub pow_GR_true_exp_Y_Gpr = pow_GR_exp_Y_Gpr, pow_GR_16ones +} +{ .mfi + addl pow_int_GR_M = 0xFFFF, r2 + fma.s1 POW_e12 = POW_e1,f1,POW_e2 + add pow_AD_T2 = pow_AD_tbl2, pow_GR_index2 +} +;; + + +{ .mmi + ldfe POW_T1 = [pow_AD_T1],16 + setf.exp POW_2M = pow_int_GR_M + andcm pow_GR_sign_Y_Gpr = pow_GR_signexp_Y_Gpr, pow_GR_17ones +} +;; + + +{ .mfb + ldfe POW_T2 = [pow_AD_T2],16 + fma.s1 POW_q = POW_Z3sq, POW_v3, POW_v2 +(p7) br.ret.spnt b0 // Early exit if y=1.0, result is x +} +;; + + +// double: p8 TRUE ==> |Y(G + r)| >= 10 +// single: p8 TRUE ==> |Y(G + r)| >= 7 + +// double +// -2^10 -2^9 2^9 2^10 +// -----+-----+----+ ... +-----+-----+----- +// p8 | p9 | p8 +// | | p10 | | +// single +// -2^7 -2^6 2^6 2^7 +// -----+-----+----+ ... +-----+-----+----- +// p8 | p9 | p8 +// | | p10 | | + + +{ .mfi +(p0) cmp.le.unc p8,p9 = 10, pow_GR_true_exp_Y_Gpr + fma.s1 POW_s = POW_s1, f1, POW_s2 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_f12 = POW_f1, POW_f2,f0 + nop.i 999 +} +;; + + +{ .mfi + nop.f 999 +(p9) cmp.le.unc p0,p10 = 9, pow_GR_true_exp_Y_Gpr +} +;; + + + +{ .mfb + nop.m 999 + fma.s1 POW_e123 = POW_e12, f1, POW_e3 +(p8) br.cond.spnt L(POW_OVER_UNDER_X_NOT_INF) +} +;; + + +{ .mmf + fma.s1 POW_q = POW_Z3sq, POW_q, POW_Z3 +} +;; + + +{ .mfi + nop.m 999 + fma.s1 POW_ssq = POW_s, POW_s, f0 + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_v4 = POW_s, POW_Q3, POW_Q2 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_v2 = POW_s, POW_Q1, POW_Q0_half + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_1ps = f1,f1,POW_s + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_f3 = POW_e123,f1,f1 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_T1T2 = POW_T1, POW_T2, f0 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_v3 = POW_ssq, POW_Q4, POW_v4 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_v21ps = POW_ssq, POW_v2, POW_1ps + nop.i 999 +} +{ .mfi + nop.m 999 + fma.s1 POW_s4 = POW_ssq, POW_ssq, f0 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_f123 = POW_f12, POW_f3, f0 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_A = POW_2M, POW_T1T2, f0 + nop.i 999 +} +;; + + + +{ .mfi + nop.m 999 +(p12) fmerge.s POW_f123 = f8,POW_f123 // if x neg, y odd int + nop.i 999 +} +{ .mfi + nop.m 999 +// fma.s1 POW_es = POW_ssq, POW_v3, POW_v2 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fma.s1 POW_es = POW_s4, POW_v3, POW_v21ps + nop.i 999 +} +;; + + +{ .mfi + nop.m 999 + fma.s1 POW_A = POW_A, POW_f123, f0 + nop.i 999 +} +{ .mfi + nop.m 999 +// fma.s1 POW_es = POW_es, POW_ssq, POW_1ps + nop.i 999 +} +;; + + +{ .mfi + nop.m 999 + fma.s1 POW_A = POW_A, POW_es,f0 + nop.i 999 +} +;; + + + +{ .mfb + nop.m 999 +(p10) fma.d f8 = POW_A, POW_q, POW_A +(p10) br.ret.sptk b0 +} +;; + + + + + +// POSSIBLE_OVER_UNDER +// p6 = TRUE ==> Y negative + +{ .mfi + nop.m 999 + fmerge.s POW_abs_A = f0, POW_A + cmp.eq.unc p0,p6 = pow_GR_sign_Y, r0 +} +;; + +{ .mib + nop.m 999 + nop.i 999 +(p6) br.cond.spnt L(POW_POSSIBLE_UNDER) +} +;; + +// POSSIBLE_OVER +// We got an answer. +// overflow is a possibility, not a certainty + + +// We define an overflow when the answer with +// WRE set +// user-defined rounding mode + +// double +// Largest double is 7FE (biased double) +// 7FE - 3FF + FFFF = 103FE +// Create + largest_double_plus_ulp +// Create - largest_double_plus_ulp +// Calculate answer with WRE set. + +// single +// Largest single is FE (biased double) +// FE - 7F + FFFF = 1007E +// Create + largest_single_plus_ulp +// Create - largest_single_plus_ulp +// Calculate answer with WRE set. + +// Cases when answer is ldn+1 are as follows: +// ldn ldn+1 +// --+----------|----------+------------ +// | +// +inf +inf -inf +// RN RN +// RZ + + +// Put in s2 (td set, wre set) +{ .mfi + mov pow_GR_gt_ln = 0x103ff + fsetc.s2 0x7F,0x42 + nop.i 999 +} +;; + + +{ .mfi + setf.exp POW_gt_pln = pow_GR_gt_ln + fma.d.s2 POW_wre_urm_f8 = POW_abs_A, POW_q, POW_abs_A + nop.i 999 ;; +} + +// Return s2 to default +{ .mfi + nop.m 999 + fsetc.s2 0x7F,0x40 + nop.i 999 +} +;; + + +// p7 = TRUE ==> yes, we have an overflow +{ .mfi + nop.m 999 + fcmp.ge.unc.s1 p7, p0 = POW_wre_urm_f8, POW_gt_pln + nop.i 999 +} +;; + + + +{ .mfb +(p7) mov pow_GR_tag = 24 + fma.d f8 = POW_A, POW_q, POW_A +(p7) br.cond.spnt __libm_error_region +} +{ .mfb + nop.m 999 + nop.f 999 +(p0) br.ret.sptk b0 +} +;; + + +L(POW_POSSIBLE_UNDER): +// We got an answer. input was < -2^9 but > -2^10 (double) +// We got an answer. input was < -2^6 but > -2^7 (float) +// underflow is a possibility, not a certainty + +// We define an underflow when the answer with +// ftz set +// is zero (tiny numbers become zero) +// Notice (from below) that if we have an unlimited exponent range, +// then there is an extra machine number E between the largest denormal and +// the smallest normal. +// So if with unbounded exponent we round to E or below, then we are +// tiny and underflow has occurred. +// But notice that you can be in a situation where we are tiny, namely +// rounded to E, but when the exponent is bounded we round to smallest +// normal. So the answer can be the smallest normal with underflow. +// E +// -----+--------------------+--------------------+----- +// | | | +// 1.1...10 2^-3fff 1.1...11 2^-3fff 1.0...00 2^-3ffe +// 0.1...11 2^-3ffe (biased, 1) +// largest dn smallest normal + + +// Put in s2 (td set, ftz set) +{ .mfi + nop.m 999 + fsetc.s2 0x7F,0x41 + nop.i 999 +} +;; + + + +{ .mfi + nop.m 999 + fma.d.s2 POW_ftz_urm_f8 = POW_A, POW_q, POW_A + nop.i 999 +} +;; + + +// Return s2 to default +{ .mfi + nop.m 999 + fsetc.s2 0x7F,0x40 + nop.i 999 +} +;; + + +// p7 = TRUE ==> yes, we have an underflow +{ .mfi + nop.m 999 + fcmp.eq.unc.s1 p7, p0 = POW_ftz_urm_f8, f0 + nop.i 999 +} +;; + + + + +{ .mfb +(p7) mov pow_GR_tag = 25 + fma.d f8 = POW_A, POW_q, POW_A +(p7) br.cond.spnt __libm_error_region +} +;; + + +{ .mfb + nop.m 999 + nop.f 999 + br.ret.sptk b0 +} +;; + + +L(POW_X_DENORM): +// Here if x unorm. Use the NORM_X for getf instructions, and the back +// to normal path +{ .mfi + getf.exp pow_GR_signexp_X = POW_NORM_X + nop.f 999 + nop.i 999 +} +;; + +{ .mfi + getf.sig pow_GR_sig_X = POW_NORM_X + nop.f 999 + nop.i 999 +} +;; + +{ .mfi + and pow_GR_exp_X = pow_GR_signexp_X, pow_GR_17ones + nop.f 999 +} +;; + +{ .mib + sub pow_GR_true_exp_X = pow_GR_exp_X, pow_GR_16ones + shl pow_GR_offset = pow_GR_sig_X, 1 + br.cond.sptk L(POW_COMMON) +} +;; + + +L(POW_X_0_Y_0): +// When X is +-0 and Y is +-0, IEEE returns 1.0 +// We call error support with this value + +{ .mfb + mov pow_GR_tag = 26 + fma.d f8 = f1,f1,f0 + br.cond.sptk __libm_error_region +} +;; + + + + +L(POW_X_INF): +// When X is +-inf and Y is +-, IEEE returns + +// overflow +// X +inf Y +inf +inf +// X -inf Y +inf +inf + +// X +inf Y >0 +inf +// X -inf Y >0, !odd integer +inf <== (-inf)^0.5 = +inf !! +// X -inf Y >0, odd integer -inf + +// underflow +// X +inf Y -inf +0 +// X -inf Y -inf +0 + +// X +inf Y <0 +0 +// X -inf Y <0, !odd integer +0 +// X -inf Y <0, odd integer -0 + +// X + inf Y=+0 +1 +// X + inf Y=-0 +1 +// X - inf Y=+0 +1 +// X - inf Y=-0 +1 + +// p13 == Y negative +// p14 == Y positive + +// p6 == Y is a floating point number outside the integer. +// Hence it is an integer and is even. +// p13 == (Y negative) +// return +inf +// p14 == (Y positive) +// return +0 + + + +// p7 == Y is a floating point number within the integer range. +// p9 == (int_Y = NORM_Y), Y is an integer, which may be odd or even. +// p11 odd +// p13 == (Y negative) +// return (sign_of_x)inf +// p14 == (Y positive) +// return (sign_of_x)0 +// pxx even +// p13 == (Y negative) +// return +inf +// p14 == (Y positive) +// return +0 + +// pxx == Y is not an integer +// p13 == (Y negative) +// return +inf +// p14 == (Y positive) +// return +0 +// + +// If x=inf, test y and flag denormal +{ .mfi + nop.m 999 + fcmp.eq.s0 p10,p11 = f9,f0 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 + fcmp.lt p13,p14 = POW_NORM_Y,f0 + cmp.gt.unc p6,p7 = pow_GR_exp_Y, pow_GR_10033 +} +{ .mfi + nop.m 999 + fclass.m p12,p0 = f9, 0x23 + nop.i 999 +} +;; + + +{ .mfi + nop.m 999 + fclass.m p15,p0 = f9, 0x07 //@zero + nop.i 999 +} +;; + +{ .mfb + nop.m 999 +(p15) fmerge.s f8 = f1,f1 +(p15) br.ret.spnt b0 +} +;; + + +{ .mfi +(p13) mov pow_GR_tag = 25 +(p14) frcpa.s1 f8,p10 = f1,f0 + nop.i 999 +} +{ .mfb +(p14) mov pow_GR_tag = 24 +(p13) fma.s1 f8 = f0,f0,f0 +(p12) br.ret.spnt b0 +} +;; + + + +{ .mfb + nop.m 999 +(p7) fcmp.eq.unc.s1 p9,p0 = POW_float_int_Y, POW_NORM_Y + nop.b 999 +} +;; + +{ .mfi + nop.m 999 + nop.f 999 +(p9) tbit.nz.unc p11,p0 = pow_GR_sig_int_Y,0 +} +;; + +{ .mfb + nop.m 999 +(p11) fmerge.s f8 = POW_NORM_X,f8 + br.ret.sptk b0 +} +;; + + + +L(POW_X_0_Y_NEG): +// When X is +-0 and Y is negative, IEEE returns +// X Y answer +// +0 -odd int +inf +// -0 -odd int -inf + +// +0 !-odd int +inf +// -0 !-odd int +inf + + +// p6 == Y is a floating point number outside the integer. +// Hence it is an integer and is even. +// return +inf + +// p7 == Y is a floating point number within the integer range. +// p9 == (int_Y = NORM_Y), Y is an integer, which may be odd or even. +// p11 odd +// return (sign_of_x)inf +// p12 even +// return +inf +// p10 == Y is not an integer +// return +inf +// +// + +{ .mfi + nop.m 999 + nop.f 999 + cmp.gt.unc p6,p7 = pow_GR_exp_Y, pow_GR_10033 +} +;; + + +{ .mfi + mov pow_GR_tag = 27 +(p7) fcmp.eq.unc.s1 p9,p10 = POW_float_int_Y, POW_NORM_Y + nop.i 999 +} +;; + + +{ .mfb + nop.m 999 +(p6) frcpa.s0 f8,p13 = f1, f0 +(p6) br.cond.sptk __libm_error_region +} +;; + +{ .mfb + nop.m 999 +(p10) frcpa.s0 f8,p13 = f1, f0 +(p10) br.cond.sptk __libm_error_region +} +;; + + + +{ .mib + nop.m 999 +(p9) tbit.nz.unc p11,p12 = pow_GR_sig_int_Y,0 + nop.b 999 +} +;; + + + +{ .mfi + nop.m 999 +(p12) frcpa.s0 f8,p13 = f1,f0 + nop.i 999 +} +;; + +{ .mfb + nop.m 999 +(p11) frcpa f8,p13 = f1,f8 + br.cond.sptk __libm_error_region +} +;; + + + + +L(POW_X_NEG_Y_NONINT): +// When X is negative and Y is a non-integer, IEEE +// returns a qnan indefinite. +// We call error support with this value + +{ .mfb + mov pow_GR_tag = 28 + frcpa f8,p6 = f0,f0 + br.cond.sptk __libm_error_region +} +;; + + + + +L(POW_X_NAN_Y_0): +// When X is a NAN and Y is zero, IEEE returns 1. +// We call error support with this value. + +{ .mfi + nop.m 0 + fma.d.s0 f10 = f8,f1,f0 + nop.i 0 +} +{ .mfb + mov pow_GR_tag = 29 + fma.d.s0 f8 = f0,f0,f1 + br.cond.sptk __libm_error_region +} +;; + + +L(POW_OVER_UNDER_X_NOT_INF): + +// p8 is TRUE for overflow +// p9 is TRUE for underflow + +// if y is infinity, we should not over/underflow + + +{ .mfi + nop.m 999 + fcmp.eq.unc.s1 p14, p13 = POW_xsq,f1 + cmp.eq.unc p8,p9 = pow_GR_sign_Y_Gpr, r0 +} +;; + +{ .mfi + nop.m 999 +(p14) fclass.m.unc p15, p0 = f9, 0x23 + nop.i 999 +} +{ .mfi + nop.m 999 +(p13) fclass.m.unc p11,p0 = f9, 0x23 + nop.i 999 +} +;; + +// p15 = TRUE if |x|=1, y=inf, return +1 +{ .mfb + nop.m 999 +(p15) fma.d f8 = f1,f1,f0 +(p15) br.ret.spnt b0 +} +;; + +.pred.rel "mutex",p8,p9 +{ .mfb +(p8) setf.exp f8 = pow_GR_17ones +(p9) fmerge.s f8 = f0,f0 +(p11) br.ret.sptk b0 +} + +{ .mfb + nop.m 999 + nop.f 999 + br.cond.sptk L(POW_OVER_UNDER_ERROR) +} +;; + +L(POW_Y_NAN): + +// Is x = +1 then result is +1, else result is quiet Y +{ .mfi + nop.m 999 + fcmp.eq.s1 p10,p9 = POW_NORM_X, f1 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p10) fcmp.eq.s0 p6,p0 = f9,f1 // Set invalid, even if x=+1 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p10) fma.d f8 = f1,f1,f0 + nop.i 999 +} +{ .mfb + nop.m 999 +(p9) fma.d f8 = f9,f8,f0 + br.ret.sptk b0 +} +;; + + +L(POW_OVER_UNDER_ERROR): + +{ .mfi + nop.m 999 + fmerge.s f10 = POW_NORM_X,POW_NORM_X + nop.i 999 +} +{ .mfi + sub pow_GR_17ones_m1 = pow_GR_17ones, r0, 1 + nop.f 999 + mov pow_GR_one = 0x1 +} +;; + +// overflow +{ .mmb +(p8) mov pow_GR_tag = 24 +(p8) setf.exp f11 = pow_GR_17ones_m1 + nop.b 999 +} +;; + + +// underflow +{ .mmi +(p9) mov pow_GR_tag = 25 +(p9) setf.exp f11 = pow_GR_one + nop.i 999 +} +;; + + +// p12 x is negative and y is an odd integer + + +{ .mfi + nop.m 999 + fma.d f8 = f11, f11, f0 + nop.i 999 +} +;; + +{ .mfi + nop.m 999 +(p12) fmerge.ns f8 = f8, f8 + nop.i 999 +} +;; + + +.endp pow +ASM_SIZE_DIRECTIVE(pow) + + +// Stack operations when calling error support. +// (1) (2) (3) (call) (4) +// sp -> + psp -> + psp -> + sp -> + +// | | | | +// | | <- GR_Y R3 ->| <- GR_RESULT | -> f8 +// | | | | +// | <-GR_Y Y2->| Y2 ->| <- GR_Y | +// | | | | +// | | <- GR_X X1 ->| | +// | | | | +// sp-64 -> + sp -> + sp -> + + +// save ar.pfs save b0 restore gp +// save gp restore ar.pfs + + + +.proc __libm_error_region +__libm_error_region: + +// Answer is inf for overflow and 0 for underflow. +.prologue +// (1) +{ .mfi + add GR_Parameter_Y=-32,sp // Parameter 2 value + nop.f 0 +.save ar.pfs,GR_SAVE_PFS + mov GR_SAVE_PFS=ar.pfs // Save ar.pfs +} +{ .mfi +.fframe 64 + add sp=-64,sp // Create new stack + nop.f 0 + mov GR_SAVE_GP=gp // Save gp +};; + + +// (2) +{ .mmi + stfd [GR_Parameter_Y] = POW_NORM_Y,16 // STORE Parameter 2 on stack + add GR_Parameter_X = 16,sp // Parameter 1 address +.save b0, GR_SAVE_B0 + mov GR_SAVE_B0=b0 // Save b0 +};; + +.body +// (3) +{ .mib + stfd [GR_Parameter_X] = POW_NORM_X // STORE Parameter 1 on stack + add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address + nop.b 0 +} +{ .mib + stfd [GR_Parameter_Y] = f8 // STORE Parameter 3 on stack + add GR_Parameter_Y = -16,GR_Parameter_Y + br.call.sptk b0=__libm_error_support# // Call error handling function +};; +{ .mmi + nop.m 0 + nop.m 0 + add GR_Parameter_RESULT = 48,sp +};; + +// (4) +{ .mmi + ldfd f8 = [GR_Parameter_RESULT] // Get return result off stack +.restore sp + add sp = 64,sp // Restore stack pointer + mov b0 = GR_SAVE_B0 // Restore return address +};; +{ .mib + mov gp = GR_SAVE_GP // Restore gp + mov ar.pfs = GR_SAVE_PFS // Restore ar.pfs + br.ret.sptk b0 // Return +};; + +.endp __libm_error_region +ASM_SIZE_DIRECTIVE(__libm_error_region) + +.type __libm_error_support#,@function +.global __libm_error_support# |