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cosmopolitan/tool/build/lib/sse.c
Justine Tunney f4f4caab0e Add x86_64-linux-gnu emulator 
I wanted a tiny scriptable meltdown proof way to run userspace programs
and visualize how program execution impacts memory. It helps to explain
how things like Actually Portable Executable works. It can show you how
the GCC generated code is going about manipulating matrices and more. I
didn't feel fully comfortable with Qemu and Bochs because I'm not smart
enough to understand them. I wanted something like gVisor but with much
stronger levels of assurances. I wanted a single binary that'll run, on
all major operating systems with an embedded GPL barrier ZIP filesystem
that is tiny enough to transpile to JavaScript and run in browsers too.

https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 04:43:42 -07:00

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/pabsb.h"
#include "libc/intrin/pabsd.h"
#include "libc/intrin/pabsw.h"
#include "libc/intrin/packssdw.h"
#include "libc/intrin/packsswb.h"
#include "libc/intrin/packuswb.h"
#include "libc/intrin/paddb.h"
#include "libc/intrin/paddd.h"
#include "libc/intrin/paddq.h"
#include "libc/intrin/paddsb.h"
#include "libc/intrin/paddsw.h"
#include "libc/intrin/paddusb.h"
#include "libc/intrin/paddusw.h"
#include "libc/intrin/paddw.h"
#include "libc/intrin/palignr.h"
#include "libc/intrin/pand.h"
#include "libc/intrin/pandn.h"
#include "libc/intrin/pavgb.h"
#include "libc/intrin/pavgw.h"
#include "libc/intrin/pcmpeqb.h"
#include "libc/intrin/pcmpeqd.h"
#include "libc/intrin/pcmpeqw.h"
#include "libc/intrin/pcmpgtb.h"
#include "libc/intrin/pcmpgtd.h"
#include "libc/intrin/pcmpgtw.h"
#include "libc/intrin/phaddd.h"
#include "libc/intrin/phaddsw.h"
#include "libc/intrin/phaddw.h"
#include "libc/intrin/phsubd.h"
#include "libc/intrin/phsubsw.h"
#include "libc/intrin/phsubw.h"
#include "libc/intrin/pmaddubsw.h"
#include "libc/intrin/pmaddwd.h"
#include "libc/intrin/pmaxsw.h"
#include "libc/intrin/pmaxub.h"
#include "libc/intrin/pminsw.h"
#include "libc/intrin/pminub.h"
#include "libc/intrin/pmulhrsw.h"
#include "libc/intrin/pmulhuw.h"
#include "libc/intrin/pmulhw.h"
#include "libc/intrin/pmulld.h"
#include "libc/intrin/pmullw.h"
#include "libc/intrin/pmuludq.h"
#include "libc/intrin/por.h"
#include "libc/intrin/psadbw.h"
#include "libc/intrin/pshufb.h"
#include "libc/intrin/psignb.h"
#include "libc/intrin/psignd.h"
#include "libc/intrin/psignw.h"
#include "libc/intrin/pslld.h"
#include "libc/intrin/pslldq.h"
#include "libc/intrin/psllq.h"
#include "libc/intrin/psllw.h"
#include "libc/intrin/psrad.h"
#include "libc/intrin/psraw.h"
#include "libc/intrin/psrld.h"
#include "libc/intrin/psrldq.h"
#include "libc/intrin/psrlq.h"
#include "libc/intrin/psrlw.h"
#include "libc/intrin/psubb.h"
#include "libc/intrin/psubd.h"
#include "libc/intrin/psubq.h"
#include "libc/intrin/psubsb.h"
#include "libc/intrin/psubsw.h"
#include "libc/intrin/psubusb.h"
#include "libc/intrin/psubusw.h"
#include "libc/intrin/psubw.h"
#include "libc/intrin/punpckhbw.h"
#include "libc/intrin/punpckhdq.h"
#include "libc/intrin/punpckhqdq.h"
#include "libc/intrin/punpckhwd.h"
#include "libc/intrin/punpcklbw.h"
#include "libc/intrin/punpckldq.h"
#include "libc/intrin/punpcklqdq.h"
#include "libc/intrin/punpcklwd.h"
#include "libc/intrin/pxor.h"
#include "libc/macros.h"
#include "libc/str/str.h"
#include "tool/build/lib/case.h"
#include "tool/build/lib/machine.h"
#include "tool/build/lib/memory.h"
#include "tool/build/lib/modrm.h"
#include "tool/build/lib/sse.h"
union MachineVector {
float f32[4];
double f64[2];
int8_t i8[16];
int16_t i16[8];
int32_t i32[4];
int64_t i64[2];
uint8_t u8[16];
uint16_t u16[8];
uint32_t u32[4];
uint64_t u64[2];
};
void OpSse(struct Machine *m, enum OpSseKernel kernel) {
int i;
uint8_t *p;
union MachineVector x, y, t;
p = GetModrmRegisterXmmPointerRead16(m);
if (Prefix66(m->xedd)) {
memcpy(&y, p, 16);
} else {
memset(&t, 0, 16);
memcpy(&t, p, 8);
memcpy(&y, &t, 16);
}
memcpy(&x, XmmRexrReg(m), 16);
switch (kernel) {
CASE(kOpSsePsubb, psubb(x.i8, x.i8, y.i8));
CASE(kOpSsePaddb, paddb(x.i8, x.i8, y.i8));
CASE(kOpSsePsubw, psubw(x.i16, x.i16, y.i16));
CASE(kOpSsePaddw, paddw(x.i16, x.i16, y.i16));
CASE(kOpSsePsubd, psubd(x.i32, x.i32, y.i32));
CASE(kOpSsePaddd, paddd(x.i32, x.i32, y.i32));
CASE(kOpSsePaddq, paddq(x.i64, x.i64, y.i64));
CASE(kOpSsePsubq, psubq(x.i64, x.i64, y.i64));
CASE(kOpSsePsubsb, psubsb(x.i8, x.i8, y.i8));
CASE(kOpSsePsubsw, psubsw(x.i16, x.i16, y.i16));
CASE(kOpSsePaddsb, paddsb(x.i8, x.i8, y.i8));
CASE(kOpSsePaddsw, paddsw(x.i16, x.i16, y.i16));
CASE(kOpSsePaddusb, paddusb(x.u8, x.u8, y.u8));
CASE(kOpSsePaddusw, paddusw(x.u16, x.u16, y.u16));
CASE(kOpSsePor, por(x.u64, x.u64, y.u64));
CASE(kOpSsePxor, pxor(x.u64, x.u64, y.u64));
CASE(kOpSsePand, pand(x.u64, x.u64, y.u64));
CASE(kOpSsePandn, pandn(x.u64, x.u64, y.u64));
CASE(kOpSsePsubusb, psubusb(x.u8, x.u8, y.u8));
CASE(kOpSsePsubusw, psubusw(x.u16, x.u16, y.u16));
CASE(kOpSsePminub, pminub(x.u8, x.u8, y.u8));
CASE(kOpSsePmaxub, pmaxub(x.u8, x.u8, y.u8));
CASE(kOpSsePminsw, pminsw(x.i16, x.i16, y.i16));
CASE(kOpSsePmaxsw, pmaxsw(x.i16, x.i16, y.i16));
CASE(kOpSsePunpcklbw, punpcklbw(x.u8, x.u8, y.u8));
CASE(kOpSsePunpckhbw, punpckhbw(x.u8, x.u8, y.u8));
CASE(kOpSsePunpcklwd, punpcklwd(x.u16, x.u16, y.u16));
CASE(kOpSsePunpckldq, punpckldq(x.u32, x.u32, y.u32));
CASE(kOpSsePunpckhwd, punpckhwd(x.u16, x.u16, y.u16));
CASE(kOpSsePunpckhdq, punpckhdq(x.u32, x.u32, y.u32));
CASE(kOpSsePunpcklqdq, punpcklqdq(x.u64, x.u64, y.u64));
CASE(kOpSsePunpckhqdq, punpckhqdq(x.u64, x.u64, y.u64));
CASE(kOpSsePacksswb, packsswb(x.i8, x.i16, y.i16));
CASE(kOpSsePackuswb, packuswb(x.u8, x.i16, y.i16));
CASE(kOpSsePackssdw, packssdw(x.i16, x.i32, y.i32));
CASE(kOpSsePcmpgtb, pcmpgtb(x.i8, x.i8, y.i8));
CASE(kOpSsePcmpgtw, pcmpgtw(x.i16, x.i16, y.i16));
CASE(kOpSsePcmpgtd, pcmpgtd(x.i32, x.i32, y.i32));
CASE(kOpSsePcmpeqb, pcmpeqb(x.u8, x.u8, y.u8));
CASE(kOpSsePcmpeqw, pcmpeqw(x.i16, x.i16, y.i16));
CASE(kOpSsePcmpeqd, pcmpeqd(x.i32, x.i32, y.i32));
CASE(kOpSsePsrawv, psrawv(x.i16, x.i16, y.u64));
CASE(kOpSsePsrlwv, psrlwv(x.u16, x.u16, y.u64));
CASE(kOpSsePsllwv, psllwv(x.u16, x.u16, y.u64));
CASE(kOpSsePsradv, psradv(x.i32, x.i32, y.u64));
CASE(kOpSsePsrldv, psrldv(x.u32, x.u32, y.u64));
CASE(kOpSsePslldv, pslldv(x.u32, x.u32, y.u64));
CASE(kOpSsePsrlqv, psrlqv(x.u64, x.u64, y.u64));
CASE(kOpSsePsllqv, psllqv(x.u64, x.u64, y.u64));
CASE(kOpSsePavgb, pavgb(x.u8, x.u8, y.u8));
CASE(kOpSsePavgw, pavgw(x.u16, x.u16, y.u16));
CASE(kOpSsePsadbw, psadbw(x.u64, x.u8, y.u8));
CASE(kOpSsePmaddwd, pmaddwd(x.i32, x.i16, y.i16));
CASE(kOpSsePmulhuw, pmulhuw(x.u16, x.u16, y.u16));
CASE(kOpSsePmulhw, pmulhw(x.i16, x.i16, y.i16));
CASE(kOpSsePmuludq, pmuludq(x.u64, x.u32, y.u32));
CASE(kOpSsePmullw, pmullw(x.i16, x.i16, y.i16));
CASE(kOpSsePmulld, pmulld(x.i32, x.i32, y.i32));
CASE(kOpSsePshufb, pshufb(x.u8, x.u8, y.u8));
CASE(kOpSsePhaddw, phaddw(x.i16, x.i16, y.i16));
CASE(kOpSsePhaddd, phaddd(x.i32, x.i32, y.i32));
CASE(kOpSsePhaddsw, phaddsw(x.i16, x.i16, y.i16));
CASE(kOpSsePmaddubsw, pmaddubsw(x.i16, x.u8, y.i8));
CASE(kOpSsePhsubw, phsubw(x.i16, x.i16, y.i16));
CASE(kOpSsePhsubd, phsubd(x.i32, x.i32, y.i32));
CASE(kOpSsePhsubsw, phsubsw(x.i16, x.i16, y.i16));
CASE(kOpSsePsignb, psignb(x.i8, x.i8, y.i8));
CASE(kOpSsePsignw, psignw(x.i16, x.i16, y.i16));
CASE(kOpSsePsignd, psignd(x.i32, x.i32, y.i32));
CASE(kOpSsePmulhrsw, pmulhrsw(x.i16, x.i16, y.i16));
CASE(kOpSsePabsb, pabsb(x.u8, x.i8));
CASE(kOpSsePabsw, pabsw(x.u16, x.i16));
CASE(kOpSsePabsd, pabsd(x.u32, x.i32));
default:
unreachable;
}
if (Prefix66(m->xedd)) {
memcpy(XmmRexrReg(m), &x, 16);
} else {
memcpy(XmmRexrReg(m), &x, 8);
}
}
void OpSseUdqIb(struct Machine *m, enum OpSseUdqIbKernel kernel) {
uint8_t i;
union MachineVector x;
i = m->xedd->op.uimm0;
memcpy(&x, XmmRexbRm(m), 16);
switch (kernel) {
CASE(kOpSseUdqIbPsrlw, (psrlw)(x.u16, x.u16, i));
CASE(kOpSseUdqIbPsraw, (psraw)(x.i16, x.i16, i));
CASE(kOpSseUdqIbPsllw, (psllw)(x.u16, x.u16, i));
CASE(kOpSseUdqIbPsrld, (psrld)(x.u32, x.u32, i));
CASE(kOpSseUdqIbPsrad, (psrad)(x.i32, x.i32, i));
CASE(kOpSseUdqIbPslld, (pslld)(x.u32, x.u32, i));
CASE(kOpSseUdqIbPsrlq, (psrlq)(x.u64, x.u64, i));
CASE(kOpSseUdqIbPsrldq, (psrldq)(x.u8, x.u8, i));
CASE(kOpSseUdqIbPsllq, (psllq)(x.u64, x.u64, i));
CASE(kOpSseUdqIbPslldq, (pslldq)(x.u8, x.u8, i));
default:
unreachable;
}
if (Prefix66(m->xedd)) {
memcpy(XmmRexbRm(m), &x, 16);
} else {
memcpy(XmmRexbRm(m), &x, 8);
}
}
static void OpSsePalignrMmx(struct Machine *m) {
char t[24];
memcpy(t, GetModrmRegisterXmmPointerRead8(m), 8);
memcpy(t + 8, XmmRexrReg(m), 8);
memset(t + 16, 0, 8);
memcpy(XmmRexrReg(m), t + MIN(m->xedd->op.uimm0, 16), 8);
}
void OpSsePalignr(struct Machine *m) {
if (Prefix66(m->xedd)) {
palignr(XmmRexrReg(m), XmmRexrReg(m), GetModrmRegisterXmmPointerRead8(m),
m->xedd->op.uimm0);
} else {
OpSsePalignrMmx(m);
}
}
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