| 1 | /* PowerPC64 __mpn_addmul_1 -- Multiply a limb vector with a limb and add |
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| 2 | the result to a second limb vector. |
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| 3 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
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| 4 | This file is part of the GNU C Library. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, see |
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| 18 | <https://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #include <sysdep.h> |
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| 21 | |
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| 22 | #ifdef USE_AS_SUBMUL |
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| 23 | # define FUNC __mpn_submul_1 |
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| 24 | # define ADDSUBC subfe |
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| 25 | # define ADDSUB subfc |
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| 26 | #else |
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| 27 | # define FUNC __mpn_addmul_1 |
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| 28 | # define ADDSUBC adde |
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| 29 | # define ADDSUB addc |
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| 30 | #endif |
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| 31 | |
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| 32 | #define RP r3 |
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| 33 | #define UP r4 |
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| 34 | #define N r5 |
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| 35 | #define VL r6 |
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| 36 | |
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| 37 | #define R27SAVE (-40) |
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| 38 | #define R28SAVE (-32) |
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| 39 | #define R29SAVE (-24) |
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| 40 | #define R30SAVE (-16) |
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| 41 | #define R31SAVE (-8) |
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| 42 | |
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| 43 | ENTRY_TOCLESS (FUNC, 5) |
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| 44 | std r31, R31SAVE(r1) |
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| 45 | rldicl. r0, N, 0, 62 |
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| 46 | std r30, R30SAVE(r1) |
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| 47 | cmpdi VL, r0, 2 |
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| 48 | std r29, R29SAVE(r1) |
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| 49 | addi N, N, 3 |
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| 50 | std r28, R28SAVE(r1) |
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| 51 | srdi N, N, 2 |
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| 52 | std r27, R27SAVE(r1) |
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| 53 | cfi_offset(r31, R31SAVE) |
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| 54 | cfi_offset(r30, R30SAVE) |
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| 55 | cfi_offset(r29, R29SAVE) |
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| 56 | cfi_offset(r28, R28SAVE) |
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| 57 | cfi_offset(r27, R27SAVE) |
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| 58 | mtctr N |
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| 59 | beq cr0, L(b00) |
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| 60 | blt cr6, L(b01) |
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| 61 | beq cr6, L(b10) |
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| 62 | |
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| 63 | L(b11): ld r9, 0(UP) |
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| 64 | ld r28, 0(RP) |
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| 65 | mulld r0, r9, VL |
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| 66 | mulhdu r12, r9, VL |
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| 67 | ADDSUB r0, r0, r28 |
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| 68 | std r0, 0(RP) |
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| 69 | addi RP, RP, 8 |
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| 70 | ld r9, 8(UP) |
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| 71 | ld r27, 16(UP) |
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| 72 | addi UP, UP, 24 |
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| 73 | #ifdef USE_AS_SUBMUL |
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| 74 | subfe r11, r11, r11 |
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| 75 | #endif |
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| 76 | b L(bot) |
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| 77 | |
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| 78 | .align 4 |
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| 79 | L(b00): ld r9, 0(UP) |
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| 80 | ld r27, 8(UP) |
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| 81 | ld r28, 0(RP) |
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| 82 | ld r29, 8(RP) |
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| 83 | mulld r0, r9, VL |
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| 84 | mulhdu N, r9, VL |
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| 85 | mulld r7, r27, VL |
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| 86 | mulhdu r8, r27, VL |
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| 87 | addc r7, r7, N |
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| 88 | addze r12, r8 |
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| 89 | ADDSUB r0, r0, r28 |
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| 90 | std r0, 0(RP) |
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| 91 | ADDSUBC r7, r7, r29 |
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| 92 | std r7, 8(RP) |
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| 93 | addi RP, RP, 16 |
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| 94 | ld r9, 16(UP) |
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| 95 | ld r27, 24(UP) |
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| 96 | addi UP, UP, 32 |
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| 97 | #ifdef USE_AS_SUBMUL |
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| 98 | subfe r11, r11, r11 |
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| 99 | #endif |
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| 100 | b L(bot) |
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| 101 | |
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| 102 | .align 4 |
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| 103 | L(b01): bdnz L(gt1) |
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| 104 | ld r9, 0(UP) |
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| 105 | ld r11, 0(RP) |
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| 106 | mulld r0, r9, VL |
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| 107 | mulhdu r8, r9, VL |
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| 108 | ADDSUB r0, r0, r11 |
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| 109 | std r0, 0(RP) |
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| 110 | #ifdef USE_AS_SUBMUL |
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| 111 | subfe r11, r11, r11 |
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| 112 | addic r11, r11, 1 |
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| 113 | #endif |
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| 114 | addze RP, r8 |
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| 115 | blr |
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| 116 | |
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| 117 | L(gt1): ld r9, 0(UP) |
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| 118 | ld r27, 8(UP) |
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| 119 | mulld r0, r9, VL |
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| 120 | mulhdu N, r9, VL |
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| 121 | mulld r7, r27, VL |
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| 122 | mulhdu r8, r27, VL |
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| 123 | ld r9, 16(UP) |
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| 124 | ld r28, 0(RP) |
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| 125 | ld r29, 8(RP) |
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| 126 | ld r30, 16(RP) |
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| 127 | mulld r11, r9, VL |
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| 128 | mulhdu r10, r9, VL |
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| 129 | addc r7, r7, N |
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| 130 | adde r11, r11, r8 |
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| 131 | addze r12, r10 |
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| 132 | ADDSUB r0, r0, r28 |
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| 133 | std r0, 0(RP) |
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| 134 | ADDSUBC r7, r7, r29 |
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| 135 | std r7, 8(RP) |
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| 136 | ADDSUBC r11, r11, r30 |
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| 137 | std r11, 16(RP) |
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| 138 | addi RP, RP, 24 |
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| 139 | ld r9, 24(UP) |
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| 140 | ld r27, 32(UP) |
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| 141 | addi UP, UP, 40 |
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| 142 | #ifdef USE_AS_SUBMUL |
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| 143 | subfe r11, r11, r11 |
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| 144 | #endif |
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| 145 | b L(bot) |
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| 146 | |
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| 147 | L(b10): addic r0, r0, r0 |
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| 148 | li r12, 0 |
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| 149 | ld r9, 0(UP) |
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| 150 | ld r27, 8(UP) |
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| 151 | bdz L(end) |
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| 152 | addi UP, UP, 16 |
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| 153 | |
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| 154 | .align 4 |
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| 155 | L(top): mulld r0, r9, VL |
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| 156 | mulhdu N, r9, VL |
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| 157 | mulld r7, r27, VL |
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| 158 | mulhdu r8, r27, VL |
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| 159 | ld r9, 0(UP) |
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| 160 | ld r28, 0(RP) |
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| 161 | ld r27, 8(UP) |
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| 162 | ld r29, 8(RP) |
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| 163 | adde r0, r0, r12 |
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| 164 | adde r7, r7, N |
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| 165 | mulld N, r9, VL |
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| 166 | mulhdu r10, r9, VL |
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| 167 | mulld r11, r27, VL |
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| 168 | mulhdu r12, r27, VL |
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| 169 | ld r9, 16(UP) |
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| 170 | ld r30, 16(RP) |
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| 171 | ld r27, 24(UP) |
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| 172 | ld r31, 24(RP) |
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| 173 | adde N, N, r8 |
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| 174 | adde r11, r11, r10 |
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| 175 | addze r12, r12 |
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| 176 | ADDSUB r0, r0, r28 |
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| 177 | std r0, 0(RP) |
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| 178 | ADDSUBC r7, r7, r29 |
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| 179 | std r7, 8(RP) |
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| 180 | ADDSUBC N, N, r30 |
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| 181 | std N, 16(RP) |
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| 182 | ADDSUBC r11, r11, r31 |
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| 183 | std r11, 24(RP) |
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| 184 | addi UP, UP, 32 |
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| 185 | #ifdef USE_AS_SUBMUL |
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| 186 | subfe r11, r11, r11 |
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| 187 | #endif |
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| 188 | addi RP, RP, 32 |
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| 189 | L(bot): |
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| 190 | #ifdef USE_AS_SUBMUL |
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| 191 | addic r11, r11, 1 |
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| 192 | #endif |
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| 193 | bdnz L(top) |
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| 194 | |
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| 195 | L(end): mulld r0, r9, VL |
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| 196 | mulhdu N, r9, VL |
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| 197 | mulld r7, r27, VL |
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| 198 | mulhdu r8, r27, VL |
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| 199 | ld r28, 0(RP) |
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| 200 | ld r29, 8(RP) |
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| 201 | adde r0, r0, r12 |
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| 202 | adde r7, r7, N |
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| 203 | addze r8, r8 |
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| 204 | ADDSUB r0, r0, r28 |
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| 205 | std r0, 0(RP) |
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| 206 | ADDSUBC r7, r7, r29 |
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| 207 | std r7, 8(RP) |
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| 208 | #ifdef USE_AS_SUBMUL |
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| 209 | subfe r11, r11, r11 |
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| 210 | addic r11, r11, 1 |
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| 211 | #endif |
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| 212 | addze RP, r8 |
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| 213 | ld r31, R31SAVE(r1) |
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| 214 | ld r30, R30SAVE(r1) |
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| 215 | ld r29, R29SAVE(r1) |
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| 216 | ld r28, R28SAVE(r1) |
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| 217 | ld r27, R27SAVE(r1) |
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| 218 | blr |
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| 219 | END(FUNC) |
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| 220 | |
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