2021-01-10 21:30:48 +00:00
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 sw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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2020-06-15 14:18:57 +00:00
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#include "libc/macros.h"
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2021-01-10 21:30:48 +00:00
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#include "libc/nexgen32e/x86feature.h"
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2020-06-15 14:18:57 +00:00
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2021-02-08 17:19:00 +00:00
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// Broadcast byte literal to vector, e.g.
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//
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// # xmm0=0x12121212121212121212121212121212
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// .bcblit $0x12,%al,%eax,%xmm0
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//
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// @param reg and regSI need to be the same register
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2020-06-15 14:18:57 +00:00
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.macro .bcblit lit:req reg:req regSI:req xmm:req
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mov \lit,\reg
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movd \regSI,\xmm
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pbroadcastb \xmm
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.endm
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2021-02-08 17:19:00 +00:00
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// Broadcast word literal to vector, e.g.
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//
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// # xmm0=0x01230123012301230123012301230123
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// .bcwlit $0x123,%ax,%eax,%xmm0
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//
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// @param reg and regSI need to be the same register
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2020-06-15 14:18:57 +00:00
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.macro .bcwlit lit:req reg:req regSI:req xmm:req
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mov \lit,\reg
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movd \regSI,\xmm
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pbroadcastw \xmm
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.endm
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2021-02-08 17:19:00 +00:00
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// Broadcast int16 from register to vector.
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2020-06-15 14:18:57 +00:00
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.macro .bcwreg regSI:req xmm:req
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movd \regSI,\xmm
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pbroadcastw \xmm
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.endm
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2021-02-08 17:19:00 +00:00
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// Sets all bytes in XMM register to first byte, e.g.
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//
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// mov $0x11,%eax
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// movd %eax,%xmm0
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// pbroadcastb %xmm0
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//
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// 11000000000000000000000000000000
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// → 11111111111111111111111111111111
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//
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// @param xmm can be %xmm0,%xmm1,etc.
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2020-06-15 14:18:57 +00:00
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.macro pbroadcastb xmm:req
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#if X86_NEED(AVX2)
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vpbroadcastb \xmm,\xmm
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#else
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punpcklbw \xmm,\xmm
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punpcklwd \xmm,\xmm
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pshufd $0,\xmm,\xmm
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#endif
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.endm
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2021-02-08 17:19:00 +00:00
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// Sets all words in XMM register to first word, e.g.
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//
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// mov $0x1234,%eax
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// movd %eax,%xmm0
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// pbroadcastw %xmm0
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//
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// 12340000000000000000000000000000
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// → 12341234123412341234123412341234
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//
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// @param xmm can be %xmm0,%xmm1,etc.
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2020-06-15 14:18:57 +00:00
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.macro pbroadcastw xmm:req
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#if X86_NEED(AVX2)
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vpbroadcastw \xmm,\xmm
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#else
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punpcklwd \xmm,\xmm
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pshufd $0,\xmm,\xmm
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#endif
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.endm
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