2013-11-22 12:38:03 +00:00
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/* PowerPC64 __mpn_addmul_1 -- Multiply a limb vector with a limb and add
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the result to a second limb vector.
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2014-01-01 11:03:15 +00:00
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Copyright (C) 1999-2014 Free Software Foundation, Inc.
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2013-11-22 12:38:03 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#ifdef USE_AS_SUBMUL
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# define FUNC __mpn_submul_1
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# define ADDSUBC subfe
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# define ADDSUB subfc
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#else
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# define FUNC __mpn_addmul_1
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# define ADDSUBC adde
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# define ADDSUB addc
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#endif
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#define RP r3
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#define UP r4
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#define N r5
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#define VL r6
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EALIGN(FUNC, 5, 0)
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std r31, -8(r1)
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rldicl. r0, N, 0, 62
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std r30, -16(r1)
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cmpdi VL, r0, 2
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std r29, -24(r1)
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addi N, N, 3
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std r28, -32(r1)
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srdi N, N, 2
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std r27, -40(r1)
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mtctr N
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beq cr0, L(b00)
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blt cr6, L(b01)
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beq cr6, L(b10)
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L(b11): ld r9, 0(UP)
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ld r28, 0(RP)
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mulld r0, r9, VL
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mulhdu r12, r9, VL
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ADDSUB r0, r0, r28
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std r0, 0(RP)
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addi RP, RP, 8
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ld r9, 8(UP)
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ld r27, 16(UP)
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addi UP, UP, 24
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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#endif
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b L(bot)
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.align 4
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L(b00): ld r9, 0(UP)
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ld r27, 8(UP)
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ld r28, 0(RP)
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ld r29, 8(RP)
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mulld r0, r9, VL
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mulhdu N, r9, VL
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mulld r7, r27, VL
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mulhdu r8, r27, VL
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addc r7, r7, N
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addze r12, r8
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ADDSUB r0, r0, r28
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std r0, 0(RP)
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ADDSUBC r7, r7, r29
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std r7, 8(RP)
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addi RP, RP, 16
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ld r9, 16(UP)
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ld r27, 24(UP)
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addi UP, UP, 32
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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#endif
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b L(bot)
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.align 4
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L(b01): bdnz L(gt1)
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ld r9, 0(UP)
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ld r11, 0(RP)
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mulld r0, r9, VL
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mulhdu r8, r9, VL
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ADDSUB r0, r0, r11
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std r0, 0(RP)
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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addic r11, r11, 1
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#endif
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addze RP, r8
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blr
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L(gt1): ld r9, 0(UP)
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ld r27, 8(UP)
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mulld r0, r9, VL
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mulhdu N, r9, VL
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mulld r7, r27, VL
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mulhdu r8, r27, VL
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ld r9, 16(UP)
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ld r28, 0(RP)
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ld r29, 8(RP)
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ld r30, 16(RP)
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mulld r11, r9, VL
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mulhdu r10, r9, VL
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addc r7, r7, N
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adde r11, r11, r8
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addze r12, r10
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ADDSUB r0, r0, r28
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std r0, 0(RP)
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ADDSUBC r7, r7, r29
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std r7, 8(RP)
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ADDSUBC r11, r11, r30
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std r11, 16(RP)
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addi RP, RP, 24
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ld r9, 24(UP)
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ld r27, 32(UP)
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addi UP, UP, 40
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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#endif
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b L(bot)
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L(b10): addic r0, r0, r0
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li r12, 0
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ld r9, 0(UP)
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ld r27, 8(UP)
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bdz L(end)
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addi UP, UP, 16
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.align 4
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L(top): mulld r0, r9, VL
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mulhdu N, r9, VL
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mulld r7, r27, VL
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mulhdu r8, r27, VL
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ld r9, 0(UP)
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ld r28, 0(RP)
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ld r27, 8(UP)
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ld r29, 8(RP)
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adde r0, r0, r12
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adde r7, r7, N
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mulld N, r9, VL
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mulhdu r10, r9, VL
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mulld r11, r27, VL
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mulhdu r12, r27, VL
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ld r9, 16(UP)
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ld r30, 16(RP)
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ld r27, 24(UP)
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ld r31, 24(RP)
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adde N, N, r8
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adde r11, r11, r10
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addze r12, r12
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ADDSUB r0, r0, r28
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std r0, 0(RP)
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ADDSUBC r7, r7, r29
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std r7, 8(RP)
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ADDSUBC N, N, r30
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std N, 16(RP)
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ADDSUBC r11, r11, r31
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std r11, 24(RP)
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addi UP, UP, 32
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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#endif
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addi RP, RP, 32
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L(bot):
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#ifdef USE_AS_SUBMUL
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addic r11, r11, 1
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#endif
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bdnz L(top)
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L(end): mulld r0, r9, VL
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mulhdu N, r9, VL
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mulld r7, r27, VL
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mulhdu r8, r27, VL
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ld r28, 0(RP)
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ld r29, 8(RP)
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adde r0, r0, r12
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adde r7, r7, N
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addze r8, r8
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ADDSUB r0, r0, r28
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std r0, 0(RP)
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ADDSUBC r7, r7, r29
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std r7, 8(RP)
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#ifdef USE_AS_SUBMUL
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subfe r11, r11, r11
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addic r11, r11, 1
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#endif
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addze RP, r8
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ld r31, -8(r1)
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ld r30, -16(r1)
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ld r29, -24(r1)
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ld r28, -32(r1)
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ld r27, -40(r1)
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blr
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END(FUNC)
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