74 lines
2.2 KiB
NASM
74 lines
2.2 KiB
NASM
;******************************************************************************
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;* x86 optimized Format Conversion Utils
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;* Copyright (c) 2008 Loren Merritt
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;*
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;* This file is part of Libav.
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;*
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;* Libav 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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;*
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;* Libav 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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;*
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;* You should have received a copy of the GNU Lesser General Public
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;* License along with Libav; if not, write to the Free Software
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;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;******************************************************************************
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%include "libavutil/x86/x86util.asm"
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SECTION .text
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;------------------------------------------------------------------------------
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; void ff_int32_to_float_fmul_scalar(float *dst, const int32_t *src, float mul,
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; int len);
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;------------------------------------------------------------------------------
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%macro INT32_TO_FLOAT_FMUL_SCALAR 1
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%if UNIX64
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cglobal int32_to_float_fmul_scalar, 3, 3, %1, dst, src, len
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%else
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cglobal int32_to_float_fmul_scalar, 4, 4, %1, dst, src, mul, len
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%endif
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%if WIN64
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SWAP 0, 2
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%elif ARCH_X86_32
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movss m0, mulm
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%endif
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%if ARCH_X86_64
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movsxd lenq, lend
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%endif
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SPLATD m0
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shl lenq, 2
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add srcq, lenq
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add dstq, lenq
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neg lenq
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.loop:
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%if cpuflag(sse2)
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cvtdq2ps m1, [srcq+lenq ]
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cvtdq2ps m2, [srcq+lenq+16]
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%else
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cvtpi2ps m1, [srcq+lenq ]
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cvtpi2ps m3, [srcq+lenq+ 8]
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cvtpi2ps m2, [srcq+lenq+16]
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cvtpi2ps m4, [srcq+lenq+24]
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movlhps m1, m3
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movlhps m2, m4
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%endif
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mulps m1, m0
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mulps m2, m0
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mova [dstq+lenq ], m1
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mova [dstq+lenq+16], m2
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add lenq, 32
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jl .loop
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REP_RET
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%endmacro
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INIT_XMM sse
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INT32_TO_FLOAT_FMUL_SCALAR 5
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INIT_XMM sse2
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INT32_TO_FLOAT_FMUL_SCALAR 3
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