| .file "tancotf.s" |
| |
| |
| // Copyright (c) 2000 - 2005, Intel Corporation |
| // All rights reserved. |
| // |
| // Contributed 2000 by the Intel Numerics Group, Intel Corporation |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // |
| // * The name of Intel Corporation may not be used to endorse or promote |
| // products derived from this software without specific prior written |
| // permission. |
| |
| // 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://www.intel.com/software/products/opensource/libraries/num.htm. |
| // |
| // History |
| //============================================================== |
| // 02/02/00 Initial version |
| // 04/04/00 Unwind support added |
| // 12/27/00 Improved speed |
| // 02/21/01 Updated to call tanl |
| // 05/30/02 Improved speed, added cotf. |
| // 11/25/02 Added explicit completer on fnorm |
| // 02/10/03 Reordered header: .section, .global, .proc, .align |
| // 04/17/03 Eliminated redundant stop bits |
| // 03/31/05 Reformatted delimiters between data tables |
| // |
| // APIs |
| //============================================================== |
| // float tanf(float) |
| // float cotf(float) |
| // |
| // Algorithm Description for tanf |
| //============================================================== |
| // The tanf function computes the principle value of the tangent of x, |
| // where x is radian argument. |
| // |
| // There are 5 paths: |
| // 1. x = +/-0.0 |
| // Return tanf(x) = +/-0.0 |
| // |
| // 2. x = [S,Q]NaN |
| // Return tanf(x) = QNaN |
| // |
| // 3. x = +/-Inf |
| // Return tanf(x) = QNaN |
| // |
| // 4. x = r + (Pi/2)*N, N = RoundInt(x*(2/Pi)), N is even, |r|<Pi/4 |
| // Return tanf(x) = P19(r) = A1*r + A3*r^3 + A5*r^5 + ... + A19*r^19 = |
| // = r*(A1 + A3*t + A5*t^2 + ... + A19*t^9) = r*P9(t), where t = r^2 |
| // |
| // 5. x = r + (Pi/2)*N, N = RoundInt(x*(2/Pi)), N is odd, |r|<Pi/4 |
| // Return tanf(x) = -1/r + P11(r) = -1/r + B1*r + B3*r^3 + ... + B11*r^11 = |
| // = -1/r + r*(B1 + B3*t + B5*t^2 + ... + B11*t^5) = -1/r + r*P11(t), |
| // where t = r^2 |
| // |
| // Algorithm Description for cotf |
| //============================================================== |
| // The cotf function computes the principle value of the cotangent of x, |
| // where x is radian argument. |
| // |
| // There are 5 paths: |
| // 1. x = +/-0.0 |
| // Return cotf(x) = +/-Inf and error handling is called |
| // |
| // 2. x = [S,Q]NaN |
| // Return cotf(x) = QNaN |
| // |
| // 3. x = +/-Inf |
| // Return cotf(x) = QNaN |
| // |
| // 4. x = r + (Pi/2)*N, N = RoundInt(x*(2/Pi)), N is odd, |r|<Pi/4 |
| // Return cotf(x) = P19(-r) = A1*(-r) + A3*(-r^3) + ... + A19*(-r^19) = |
| // = -r*(A1 + A3*t + A5*t^2 + ... + A19*t^9) = -r*P9(t), where t = r^2 |
| // |
| // 5. x = r + (Pi/2)*N, N = RoundInt(x*(2/Pi)), N is even, |r|<Pi/4 |
| // Return cotf(x) = 1/r + P11(-r) = 1/r + B1*(-r) + ... + B11*(-r^11) = |
| // = 1/r - r*(B1 + B3*t + B5*t^2 + ... + B11*t^5) = 1/r - r*P11(t), |
| // where t = r^2 |
| // |
| // We set p10 and clear p11 if computing tanf, vice versa for cotf. |
| // |
| // |
| // Registers used |
| //============================================================== |
| // Floating Point registers used: |
| // f8, input |
| // f32 -> f80 |
| // |
| // General registers used: |
| // r14 -> r23, r32 -> r39 |
| // |
| // Predicate registers used: |
| // p6 -> p13 |
| // |
| // Assembly macros |
| //============================================================== |
| // integer registers |
| rExp = r14 |
| rSignMask = r15 |
| rRshf = r16 |
| rScFctrExp = r17 |
| rIntN = r18 |
| rSigRcpPiby2 = r19 |
| rScRshf = r20 |
| rCoeffA = r21 |
| rCoeffB = r22 |
| rExpCut = r23 |
| |
| GR_SAVE_B0 = r33 |
| GR_SAVE_PFS = r34 |
| GR_SAVE_GP = r35 |
| GR_Parameter_X = r36 |
| GR_Parameter_Y = r37 |
| GR_Parameter_RESULT = r38 |
| GR_Parameter_Tag = r39 |
| |
| //============================================================== |
| // floating point registers |
| fScRcpPiby2 = f32 |
| fScRshf = f33 |
| fNormArg = f34 |
| fScFctr = f35 |
| fRshf = f36 |
| fShiftedN = f37 |
| fN = f38 |
| fR = f39 |
| fA01 = f40 |
| fA03 = f41 |
| fA05 = f42 |
| fA07 = f43 |
| fA09 = f44 |
| fA11 = f45 |
| fA13 = f46 |
| fA15 = f47 |
| fA17 = f48 |
| fA19 = f49 |
| fB01 = f50 |
| fB03 = f51 |
| fB05 = f52 |
| fB07 = f53 |
| fB09 = f54 |
| fB11 = f55 |
| fA03_01 = f56 |
| fA07_05 = f57 |
| fA11_09 = f58 |
| fA15_13 = f59 |
| fA19_17 = f60 |
| fA11_05 = f61 |
| fA19_13 = f62 |
| fA19_05 = f63 |
| fRbyA03_01 = f64 |
| fB03_01 = f65 |
| fB07_05 = f66 |
| fB11_09 = f67 |
| fB11_05 = f68 |
| fRbyB03_01 = f69 |
| fRbyB11_01 = f70 |
| fRp2 = f71 |
| fRp4 = f72 |
| fRp8 = f73 |
| fRp5 = f74 |
| fY0 = f75 |
| fY1 = f76 |
| fD = f77 |
| fDp2 = f78 |
| fInvR = f79 |
| fPiby2 = f80 |
| //============================================================== |
| |
| |
| RODATA |
| .align 16 |
| |
| LOCAL_OBJECT_START(coeff_A) |
| data8 0x3FF0000000000000 // A1 = 1.00000000000000000000e+00 |
| data8 0x3FD5555556BCE758 // A3 = 3.33333334641442641606e-01 |
| data8 0x3FC111105C2DAE48 // A5 = 1.33333249100689099175e-01 |
| data8 0x3FABA1F876341060 // A7 = 5.39701122561673229739e-02 |
| data8 0x3F965FB86D12A38D // A9 = 2.18495194027670719750e-02 |
| data8 0x3F8265F62415F9D6 // A11 = 8.98353860497717439465e-03 |
| data8 0x3F69E3AE64CCF58D // A13 = 3.16032468108912746342e-03 |
| data8 0x3F63920D09D0E6F6 // A15 = 2.38897844840557235331e-03 |
| LOCAL_OBJECT_END(coeff_A) |
| |
| LOCAL_OBJECT_START(coeff_B) |
| data8 0xC90FDAA22168C235, 0x3FFF // pi/2 |
| data8 0x3FD55555555358DB // B1 = 3.33333333326107426583e-01 |
| data8 0x3F96C16C252F643F // B3 = 2.22222230621336129239e-02 |
| data8 0x3F61566243AB3C60 // B5 = 2.11638633968606896785e-03 |
| data8 0x3F2BC1169BD4438B // B7 = 2.11748132564551094391e-04 |
| data8 0x3EF611B4CEA056A1 // B9 = 2.10467959860990200942e-05 |
| data8 0x3EC600F9E32194BF // B11 = 2.62305891234274186608e-06 |
| data8 0xBF42BA7BCC177616 // A17 =-5.71546981685324877205e-04 |
| data8 0x3F4F2614BC6D3BB8 // A19 = 9.50584530849832782542e-04 |
| LOCAL_OBJECT_END(coeff_B) |
| |
| |
| .section .text |
| |
| LOCAL_LIBM_ENTRY(cotf) |
| |
| { .mlx |
| getf.exp rExp = f8 // ***** Get 2ˆ17 * s + E |
| movl rSigRcpPiby2= 0xA2F9836E4E44152A // significand of 2/Pi |
| } |
| { .mlx |
| addl rCoeffA = @ltoff(coeff_A), gp |
| movl rScRshf = 0x47e8000000000000 // 1.5*2^(63+63+1) |
| } |
| ;; |
| |
| { .mfi |
| alloc r32 = ar.pfs, 0, 4, 4, 0 |
| fclass.m p9, p0 = f8, 0xc3 // Test for x=nan |
| cmp.eq p11, p10 = r0, r0 // if p11=1 we compute cotf |
| } |
| { .mib |
| ld8 rCoeffA = [rCoeffA] |
| mov rExpCut = 0x10009 // cutoff for exponent |
| br.cond.sptk Common_Path |
| } |
| ;; |
| |
| LOCAL_LIBM_END(cotf) |
| |
| |
| GLOBAL_IEEE754_ENTRY(tanf) |
| |
| { .mlx |
| getf.exp rExp = f8 // ***** Get 2ˆ17 * s + E |
| movl rSigRcpPiby2= 0xA2F9836E4E44152A // significand of 2/Pi |
| } |
| { .mlx |
| addl rCoeffA = @ltoff(coeff_A), gp |
| movl rScRshf = 0x47e8000000000000 // 1.5*2^(63+63+1) |
| } |
| ;; |
| |
| { .mfi |
| alloc r32 = ar.pfs, 0, 4, 4, 0 |
| fclass.m p9, p0 = f8, 0xc3 // Test for x=nan |
| cmp.eq p10, p11 = r0, r0 // if p10=1 we compute tandf |
| } |
| { .mib |
| ld8 rCoeffA = [rCoeffA] |
| mov rExpCut = 0x10009 // cutoff for exponent |
| nop.b 0 |
| } |
| ;; |
| |
| // Below is common path for both tandf and cotdf |
| Common_Path: |
| { .mfi |
| setf.sig fScRcpPiby2 = rSigRcpPiby2 // 2^(63+1)*(2/Pi) |
| fclass.m p8, p0 = f8, 0x23 // Test for x=inf |
| mov rSignMask = 0x1ffff // mask for sign bit |
| } |
| { .mlx |
| setf.d fScRshf = rScRshf // 1.5*2^(63+63+1) |
| movl rRshf = 0x43e8000000000000 // 1.5 2^63 for right shift |
| } |
| ;; |
| |
| { .mfi |
| and rSignMask = rSignMask, rExp // clear sign bit |
| (p10) fclass.m.unc p7, p0 = f8, 0x07 // Test for x=0 (for tanf) |
| mov rScFctrExp = 0xffff-64 // exp of scaling factor |
| } |
| { .mfb |
| adds rCoeffB = coeff_B - coeff_A, rCoeffA |
| (p9) fma.s.s0 f8 = f8, f1, f8 // Set qnan if x=nan |
| (p9) br.ret.spnt b0 // Exit for x=nan |
| } |
| ;; |
| |
| { .mfi |
| cmp.ge p6, p0 = rSignMask, rExpCut // p6 = (E => 0x10009) |
| (p8) frcpa.s0 f8, p0 = f0, f0 // Set qnan indef if x=inf |
| mov GR_Parameter_Tag = 227 // (cotf) |
| } |
| { .mbb |
| ldfe fPiby2 = [rCoeffB], 16 |
| (p8) br.ret.spnt b0 // Exit for x=inf |
| (p6) br.cond.spnt Huge_Argument // Branch if |x|>=2^10 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p11) fclass.m.unc p6, p0 = f8, 0x07 // Test for x=0 (for cotf) |
| nop.i 0 |
| } |
| { .mfb |
| nop.m 0 |
| fnorm.s0 fNormArg = f8 |
| (p7) br.ret.spnt b0 // Exit for x=0 (for tanf) |
| } |
| ;; |
| |
| { .mmf |
| ldfpd fA01, fA03 = [rCoeffA], 16 |
| ldfpd fB01, fB03 = [rCoeffB], 16 |
| fmerge.s f10 = f8, f8 // Save input for error call |
| } |
| ;; |
| |
| { .mmf |
| setf.exp fScFctr = rScFctrExp // get as real |
| setf.d fRshf = rRshf // get right shifter as real |
| (p6) frcpa.s0 f8, p0 = f1, f8 // cotf(+-0) = +-Inf |
| } |
| ;; |
| |
| { .mmb |
| ldfpd fA05, fA07 = [rCoeffA], 16 |
| ldfpd fB05, fB07 = [rCoeffB], 16 |
| (p6) br.cond.spnt __libm_error_region // call error support if cotf(+-0) |
| } |
| ;; |
| |
| { .mmi |
| ldfpd fA09, fA11 = [rCoeffA], 16 |
| ldfpd fB09, fB11 = [rCoeffB], 16 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| fma.s1 fShiftedN = fNormArg,fScRcpPiby2,fScRshf // x*2^70*(2/Pi)+ScRshf |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| fms.s1 fN = fShiftedN, fScFctr, fRshf // N = Y*2^(-70) - Rshf |
| nop.i 0 |
| } |
| ;; |
| |
| .pred.rel "mutex", p10, p11 |
| { .mfi |
| getf.sig rIntN = fShiftedN // get N as integer |
| (p10) fnma.s1 fR = fN, fPiby2, fNormArg // R = x - (Pi/2)*N (tanf) |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p11) fms.s1 fR = fN, fPiby2, fNormArg // R = (Pi/2)*N - x (cotf) |
| nop.i 0 |
| } |
| ;; |
| |
| { .mmi |
| ldfpd fA13, fA15 = [rCoeffA], 16 |
| ldfpd fA17, fA19 = [rCoeffB], 16 |
| nop.i 0 |
| } |
| ;; |
| |
| Return_From_Huges: |
| { .mfi |
| nop.m 0 |
| fma.s1 fRp2 = fR, fR, f0 // R^2 |
| (p11) add rIntN = 0x1, rIntN // N = N + 1 (cotf) |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| frcpa.s1 fY0, p0 = f1, fR // Y0 ~ 1/R |
| tbit.z p8, p9 = rIntN, 0 // p8=1 if N is even |
| } |
| ;; |
| |
| // Below are mixed polynomial calculations (mixed for even and odd N) |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fB03_01 = fRp2, fB03, fB01 // R^2*B3 + B1 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| fma.s1 fRp4 = fRp2, fRp2, f0 // R^4 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA15_13 = fRp2, fA15, fA13 // R^2*A15 + A13 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA19_17 = fRp2, fA19, fA17 // R^2*A19 + A17 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA07_05 = fRp2, fA07, fA05 // R^2*A7 + A5 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA11_09 = fRp2, fA11, fA09 // R^2*A11 + A9 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fB07_05 = fRp2, fB07, fB05 // R^2*B7 + B5 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fB11_09 = fRp2, fB11, fB09 // R^2*B11 + B9 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p9) fnma.s1 fD = fR, fY0, f1 // D = 1 - R*Y0 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA03_01 = fRp2, fA03, fA01 // R^2*A3 + A1 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| fma.s1 fRp8 = fRp4, fRp4, f0 // R^8 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| fma.s1 fRp5 = fR, fRp4, f0 // R^5 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA11_05 = fRp4, fA11_09, fA07_05 // R^4*(R^2*A11 + A9) + ... |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p8) fma.s1 fA19_13 = fRp4, fA19_17, fA15_13 // R^4*(R^2*A19 + A17) + .. |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fB11_05 = fRp4, fB11_09, fB07_05 // R^4*(R^2*B11 + B9) + ... |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fRbyB03_01 = fR, fB03_01, f0 // R*(R^2*B3 + B1) |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fY1 = fY0, fD, fY0 // Y1 = Y0*D + Y0 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p9) fma.s1 fDp2 = fD, fD, f0 // D^2 |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| // R^8*(R^6*A19 + R^4*A17 + R^2*A15 + A13) + R^6*A11 + R^4*A9 + R^2*A7 + A5 |
| (p8) fma.d.s1 fA19_05 = fRp8, fA19_13, fA11_05 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| (p8) fma.d.s1 fRbyA03_01 = fR, fA03_01, f0 // R*(R^2*A3 + A1) |
| nop.i 0 |
| } |
| ;; |
| |
| { .mfi |
| nop.m 0 |
| (p9) fma.d.s1 fInvR = fY1, fDp2, fY1 // 1/R = Y1*D^2 + Y1 |
| nop.i 0 |
| } |
| { .mfi |
| nop.m 0 |
| // R^5*(R^6*B11 + R^4*B9 + R^2*B7 + B5) + R^3*B3 + R*B1 |
| (p9) fma.d.s1 fRbyB11_01 = fRp5, fB11_05, fRbyB03_01 |
| nop.i 0 |
| } |
| ;; |
| |
| .pred.rel "mutex", p8, p9 |
| { .mfi |
| nop.m 0 |
| // Result = R^5*(R^14*A19 + R^12*A17 + R^10*A15 + ...) + R^3*A3 + R*A1 |
| (p8) fma.s.s0 f8 = fRp5, fA19_05, fRbyA03_01 |
| nop.i 0 |
| } |
| { .mfb |
| nop.m 0 |
| // Result = -1/R + R^11*B11 + R^9*B9 + R^7*B7 + R^5*B5 + R^3*B3 + R*B1 |
| (p9) fnma.s.s0 f8 = f1, fInvR, fRbyB11_01 |
| br.ret.sptk b0 // exit for main path |
| } |
| ;; |
| |
| GLOBAL_IEEE754_END(tanf) |
| |
| |
| LOCAL_LIBM_ENTRY(__libm_callout) |
| Huge_Argument: |
| .prologue |
| |
| { .mfi |
| nop.m 0 |
| fmerge.s f9 = f0,f0 |
| .save ar.pfs,GR_SAVE_PFS |
| mov GR_SAVE_PFS=ar.pfs |
| } |
| ;; |
| |
| { .mfi |
| mov GR_SAVE_GP=gp |
| nop.f 0 |
| .save b0, GR_SAVE_B0 |
| mov GR_SAVE_B0=b0 |
| } |
| |
| .body |
| { .mmb |
| nop.m 999 |
| nop.m 999 |
| (p10) br.cond.sptk.many call_tanl ;; |
| } |
| |
| // Here if we should call cotl (p10=0, p11=1) |
| { .mmb |
| nop.m 999 |
| nop.m 999 |
| br.call.sptk.many b0=__libm_cotl# ;; |
| } |
| |
| { .mfi |
| mov gp = GR_SAVE_GP |
| fnorm.s.s0 f8 = f8 |
| mov b0 = GR_SAVE_B0 |
| } |
| ;; |
| |
| { .mib |
| nop.m 999 |
| mov ar.pfs = GR_SAVE_PFS |
| br.ret.sptk b0 |
| ;; |
| } |
| |
| // Here if we should call tanl (p10=1, p11=0) |
| call_tanl: |
| { .mmb |
| nop.m 999 |
| nop.m 999 |
| br.call.sptk.many b0=__libm_tanl# ;; |
| } |
| |
| { .mfi |
| mov gp = GR_SAVE_GP |
| fnorm.s.s0 f8 = f8 |
| mov b0 = GR_SAVE_B0 |
| } |
| ;; |
| |
| { .mib |
| nop.m 999 |
| mov ar.pfs = GR_SAVE_PFS |
| br.ret.sptk b0 |
| ;; |
| } |
| |
| LOCAL_LIBM_END(__libm_callout) |
| |
| .type __libm_tanl#,@function |
| .global __libm_tanl# |
| .type __libm_cotl#,@function |
| .global __libm_cotl# |
| |
| |
| LOCAL_LIBM_ENTRY(__libm_error_region) |
| .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 |
| stfs [GR_Parameter_Y] = f1,16 // 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 |
| stfs [GR_Parameter_X] = f10 // STORE Parameter 1 on stack |
| add GR_Parameter_RESULT = 0,GR_Parameter_Y // Parameter 3 address |
| nop.b 0 |
| } |
| { .mib |
| stfs [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 |
| ldfs 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 |
| };; |
| |
| LOCAL_LIBM_END(__libm_error_region) |
| |
| .type __libm_error_support#,@function |
| .global __libm_error_support# |
| |
