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Hardfloat + maintainers and gitdm

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Merge remote-tracking branch 'remotes/stsquad/tags/pull-hardfloat-and-gitdm-171218-3' into staging

Hardfloat + maintainers and gitdm

# gpg: Signature made Mon 17 Dec 2018 10:55:19 GMT
# gpg:                using RSA key FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>"
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8  DF35 FBD0 DB09 5A9E 2A44

* remotes/stsquad/tags/pull-hardfloat-and-gitdm-171218-3:
  hardfloat: implement float32/64 comparison
  hardfloat: implement float32/64 square root
  hardfloat: implement float32/64 fused multiply-add
  hardfloat: implement float32/64 division
  hardfloat: implement float32/64 multiplication
  hardfloat: implement float32/64 addition and subtraction
  fpu: introduce hardfloat
  tests/fp: add fp-bench
  softfloat: add float{32,64}_is_zero_or_normal
  softfloat: rename canonicalize to sf_canonicalize
  target/tricore: use float32_is_denormal
  softfloat: add float{32,64}_is_{de,}normal
  fp-test: pick TARGET_ARM to get its specialization
  MAINTAINERS: update status of FPU emulation
  contrib: add a basic gitdm config

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-12-17 23:46:05 +00:00
commit ec3c927f3d
18 changed files with 1794 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
MAINTAINERS
View File

@ -127,9 +127,11 @@ F: include/sysemu/cpus.h
FPU emulation
M: Aurelien Jarno <aurelien@aurel32.net>
M: Peter Maydell <peter.maydell@linaro.org>
S: Odd Fixes
M: Alex Bennée <alex.bennee@linaro.org>
S: Maintained
F: fpu/
F: include/fpu/
F: tests/fp/
Alpha
M: Richard Henderson <rth@twiddle.net>

27
contrib/gitdm/aliases Normal file
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@ -0,0 +1,27 @@
#
# This is the email aliases file, mapping secondary addresses
# onto a single, canonical address. Duplicates some info from .mailmap
#
# weird commits
balrog@c046a42c-6fe2-441c-8c8c-71466251a162 balrogg@gmail.com
aliguori@c046a42c-6fe2-441c-8c8c-71466251a162 anthony@codemonkey.ws
aurel32@c046a42c-6fe2-441c-8c8c-71466251a162 aurelien@aurel32.net
blueswir1@c046a42c-6fe2-441c-8c8c-71466251a162 blauwirbel@gmail.com
edgar_igl@c046a42c-6fe2-441c-8c8c-71466251a162 edgar.iglesias@gmail.com
bellard@c046a42c-6fe2-441c-8c8c-71466251a162 fabrice@bellard.org
j_mayer@c046a42c-6fe2-441c-8c8c-71466251a162 l_indien@magic.fr
pbrook@c046a42c-6fe2-441c-8c8c-71466251a162 paul@codesourcery.com
ths@c046a42c-6fe2-441c-8c8c-71466251a162 ths@networkno.de
malc@c046a42c-6fe2-441c-8c8c-71466251a162 av1474@comtv.ru
# There is also a:
# (no author) <(no author)@c046a42c-6fe2-441c-8c8c-71466251a162>
# for the cvs2svn initialization commit e63c3dc74bf.
# Next, translate a few commits where mailman rewrote the From: line due
# to strict SPF, although we prefer to avoid adding more entries like that.
"Ed Swierk via Qemu-devel" eswierk@skyportsystems.com
"Ian McKellar via Qemu-devel" ianloic@google.com
"Julia Suvorova via Qemu-devel" jusual@mail.ru
"Justin Terry (VM) via Qemu-devel" juterry@microsoft.com

19
contrib/gitdm/domain-map Normal file
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@ -0,0 +1,19 @@
#
# QEMU gitdm domain-map
#
# This maps email domains to nice easy to read company names
#
amd.com AMD
greensocs.com GreenSocs
ibm.com IBM
igalia.com Igalia
linaro.org Linaro
oracle.com Oracle
redhat.com Red Hat
siemens.com Siemens
sifive.com SiFive
suse.de SUSE
virtuozzo.com Virtuozzo
wdc.com Western Digital
xilinx.com Xilinx

146
contrib/gitdm/filetypes.txt Normal file
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@ -0,0 +1,146 @@
# -*- coding:utf-8 -*-
# Copyright (C) 2006 Libresoft
#
# 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; either version 2 of the License, or
# (at your option any later version.
#
# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Authors : Gregorio Robles <grex@gsyc.escet.urjc.es>
# Authors : Germán Póo-Caamaño <gpoo@gnome.org>
#
# This QEMU version is a cut-down version of what originally shipped
# in the gitdm sample-config directory.
#
# This file contains associations parameters regarding filetypes
# (documentation, develompent, multimedia, images...)
#
# format:
# filetype <type> <regex> [<comment>]
#
# Order:
# The list should keep an order, so filetypes can be counted properly.
# ie. we want ltmain.sh -> 'build' instead of 'code'.
#
# If there is an filetype which is not in order but has values, it will
# be added at the end.
#
order build,tests,code,documentation,devel-doc,blobs
#
#
# Code files (headers and the like included
# (most common languages first
#
filetype code \.c$ # C
filetype code \.inc.c$ # C
filetype code \.C$ # C++
filetype code \.cpp$ # C++
filetype code \.c\+\+$ # C++
filetype code \.cxx$ # C++
filetype code \.cc$ # C++
filetype code \.h$ # C or C++ header
filetype code \.hh$ # C++ header
filetype code \.hpp$ # C++ header
filetype code \.hxx$ # C++ header
filetype code \.sh$ # Shell
filetype code \.pl$ # Perl
filetype code \.py$ # Python
filetype code \.s$ # Assembly
filetype code \.S$ # Assembly
filetype code \.asm$ # Assembly
filetype code \.awk$ # awk
filetype code ^common$ # script fragements
filetype code ^common.*$ # script fragements
filetype code (qom|qmp)-\w+$ # python script fragments
#
# Interface/api files
#
filetype interface \.json$ # json
filetype interface \.hx$ # documented options
#
# Test related blobs (unfortunately we can't filter out test code)
#
filetype tests \.hex$
filetype tests \d{2,3}$ # test data 00-999
filetype tests ^[A-Z]{4}$ # ACPI test data
filetype tests ^[A-Z]{4}\.*$ # ACPI test data
filetype tests \.out$
filetype tests \.out\.nocache$
filetype tests \.err$
filetype tests \.exit$ # bad-if-FOO.exit etc
filetype tests \.decode$
filetype tests \.yml$ # travis/shippable config
#
# Development documentation files (for hacking generally)
#
filetype devel-doc ^readme.*$
filetype devel-doc ^changelog.*
filetype devel-doc ^hacking.*$
filetype devel-doc ^licen(s|c)e.*$
filetype devel-doc ^copying.*$
filetype devel-doc ^MAINTAINERS$
filetype devel-doc ^BSD-2-Clause$
filetype devel-doc ^BSD-3-Clause$
filetype devel-doc ^GPL-2.0$
filetype devel-doc \.txt$
filetype devel-doc \.rst$
filetype devel-doc \.texi$
filetype devel-doc \.pod$
#
# Building, compiling, and configuration admin files
#
filetype build configure.*$
filetype build Makefile$
filetype build Makefile\.*$
filetype build config$
filetype build conf$
filetype build \.cfg$
filetype build \.mk$
filetype build \.mak$
filetype build \.docker$
filetype build \.pre$
filetype build ^.gitignore$
filetype build ^.gitmodules$
filetype build ^.gitpublish$
filetype build ^.mailmap$
filetype build ^.dir-locals.el$
filetype build ^.editorconfig$
filetype build ^.exrc$
filetype build ^.gdbinit$
filetype build \.cocci$ # Coccinelle semantic patches
#
# Misc blobs
#
filetype blobs \.bin$
filetype blobs \.dtb$
filetype blobs \.dts$
filetype blobs \.rom$
filetype blobs \.img$
filetype blobs \.ndrv$
filetype blobs \.bmp$
filetype blobs \.svg$
filetype blobs ^pi_10.com$
#
# Documentation files
#
filetype documentation \.html$
filetype documentation \.txt$
filetype documentation \.texi$
filetype documentation \.po$ # translation files

14
contrib/gitdm/group-map-academics Normal file
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@ -0,0 +1,14 @@
#
# QEMU is quite often used for academic research purposes and we like
# it even better when the work is up-streamed so the project can
# benefit.
#
# We group our academic contributors here
#
# Institute for System Programming of Russian Academy of Science
ispras.ru
# Columbia University
cs.columbia.edu
cota@braap.org

3
contrib/gitdm/group-map-cadence Normal file
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@ -0,0 +1,3 @@
# Cadence Design Systems
jcmvbkbc@gmail.com

1
contrib/gitdm/group-map-codeweavers Normal file
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@ -0,0 +1 @@
sergio.g.delreal@gmail.com

6
contrib/gitdm/group-map-ibm Normal file
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@ -0,0 +1,6 @@
#
# Some IBM contributors submit via another domain
#
clg@kaod.org
groug@kaod.org

10
contrib/gitdm/group-map-individuals Normal file
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@ -0,0 +1,10 @@
#
# Individual and personal contributors
#
# This is simply to allow prolific developers with no company
# affiliations to be grouped together in the summary stats.
#
f4bug@amsat.org
mjt@tls.msk.ru
mark.cave-ayland@ilande.co.uk

7
contrib/gitdm/group-map-redhat Normal file
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@ -0,0 +1,7 @@
#
# Red Hat contributors using non-corporate email
#
david@gibson.dropbear.id.au
laurent@vivier.eu
pjp@fedoraproject.org

18
contrib/gitdm/group-map-wavecomp Normal file
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@ -0,0 +1,18 @@
#
# Wave Computing acquired MIPS in June 2018. Also, from February 2013
# to October 2017, MIPS was owned by Imagination Technologies.
#
aleksandar.markovic@imgtec.com
aleksandar.markovic@mips.com
amarkovic@wavecomp.com
arikalo@wavecomp.com
dnikolic@wavecomp.com
james.hogan@mips.com
matthew.fortune@mips.com
paul.burton@imgtec.com
pburton@wavecomp.com
smarkovic@wavecomp.com
yongbok.kim@imgtec.com
yongbok.kim@mips.com
ysu@wavecomp.com

871
fpu/softfloat.c
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File diff suppressed because it is too large Load Diff

50
gitdm.config Normal file
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@ -0,0 +1,50 @@
#
# This is the gitdm configuration file for QEMU.
#
# It is to be used with LWN's git dataminer tool for generating
# reports about development activity in the QEMU repo. The LWN gitdm
# tool can be found at:
#
# git://git.lwn.net/gitdm.git
#
# A run to generate a report for the last year of activity would be
#
# git log --numstat --since "Last Year" | gitdm -n -l 10
#
# EmailAliases lets us cope with developers who use more
# than one address or have changed addresses. This duplicates some of
# the information in the existing .mailmap but in a slightly different
# form.
#
EmailAliases contrib/gitdm/aliases
#
# EmailMap does the main work of mapping addresses onto
# employers.
#
EmailMap contrib/gitdm/domain-map
#
# Use GroupMap to map a file full of addresses to the
# same employer. This is used for people that don't post from easily
# identifiable corporate emails.
#
GroupMap contrib/gitdm/group-map-redhat Red Hat
GroupMap contrib/gitdm/group-map-wavecomp Wave Computing
GroupMap contrib/gitdm/group-map-cadence Cadence Design Systems
GroupMap contrib/gitdm/group-map-codeweavers CodeWeavers
GroupMap contrib/gitdm/group-map-ibm IBM
# Also group together our prolific individual contributors
# and those working under academic auspices
GroupMap contrib/gitdm/group-map-individuals (None)
GroupMap contrib/gitdm/group-map-academics Academics (various)
#
#
# Use FileTypeMap to map a file types to file names using regular
# regular expressions.
#
FileTypeMap contrib/gitdm/filetypes.txt

30
include/fpu/softfloat.h
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@ -464,6 +464,21 @@ static inline int float32_is_zero_or_denormal(float32 a)
return (float32_val(a) & 0x7f800000) == 0;
}
static inline bool float32_is_normal(float32 a)
{
return ((float32_val(a) + 0x00800000) & 0x7fffffff) >= 0x01000000;
}
static inline bool float32_is_denormal(float32 a)
{
return float32_is_zero_or_denormal(a) && !float32_is_zero(a);
}
static inline bool float32_is_zero_or_normal(float32 a)
{
return float32_is_normal(a) || float32_is_zero(a);
}
static inline float32 float32_set_sign(float32 a, int sign)
{
return make_float32((float32_val(a) & 0x7fffffff) | (sign << 31));
@ -605,6 +620,21 @@ static inline int float64_is_zero_or_denormal(float64 a)
return (float64_val(a) & 0x7ff0000000000000LL) == 0;
}
static inline bool float64_is_normal(float64 a)
{
return ((float64_val(a) + (1ULL << 52)) & -1ULL >> 1) >= 1ULL << 53;
}
static inline bool float64_is_denormal(float64 a)
{
return float64_is_zero_or_denormal(a) && !float64_is_zero(a);
}
static inline bool float64_is_zero_or_normal(float64 a)
{
return float64_is_normal(a) || float64_is_zero(a);
}
static inline float64 float64_set_sign(float64 a, int sign)
{
return make_float64((float64_val(a) & 0x7fffffffffffffffULL)

9
target/tricore/fpu_helper.c
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@ -44,11 +44,6 @@ static inline uint8_t f_get_excp_flags(CPUTriCoreState *env)
| float_flag_inexact);
}
static inline bool f_is_denormal(float32 arg)
{
return float32_is_zero_or_denormal(arg) && !float32_is_zero(arg);
}
static inline float32 f_maddsub_nan_result(float32 arg1, float32 arg2,
float32 arg3, float32 result,
uint32_t muladd_negate_c)
@ -260,8 +255,8 @@ uint32_t helper_fcmp(CPUTriCoreState *env, uint32_t r1, uint32_t r2)
set_flush_inputs_to_zero(0, &env->fp_status);
result = 1 << (float32_compare_quiet(arg1, arg2, &env->fp_status) + 1);
result |= f_is_denormal(arg1) << 4;
result |= f_is_denormal(arg2) << 5;
result |= float32_is_denormal(arg1) << 4;
result |= float32_is_denormal(arg2) << 5;
flags = f_get_excp_flags(env);
if (flags) {

1
tests/fp/.gitignore vendored
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@ -1 +1,2 @@
fp-test
fp-bench

8
tests/fp/Makefile
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@ -29,6 +29,9 @@ QEMU_INCLUDES += -I$(TF_SOURCE_DIR)
# work around TARGET_* poisoning
QEMU_CFLAGS += -DHW_POISON_H
# define a target to match testfloat's implementation-defined choices, such as
# whether to raise the invalid flag when dealing with NaNs in muladd.
QEMU_CFLAGS += -DTARGET_ARM
# capstone has a platform.h file that clashes with softfloat's
QEMU_CFLAGS := $(filter-out %capstone, $(QEMU_CFLAGS))
@ -550,7 +553,7 @@ TF_OBJS_LIB += $(TF_OBJS_WRITECASE)
TF_OBJS_LIB += testLoops_common.o
TF_OBJS_LIB += $(TF_OBJS_TEST)
BINARIES := fp-test$(EXESUF)
BINARIES := fp-test$(EXESUF) fp-bench$(EXESUF)
# everything depends on config-host.h because platform.h includes it
all: $(BUILD_DIR)/config-host.h
@ -587,10 +590,13 @@ $(TF_OBJS_LIB) slowfloat.o: %.o: $(TF_SOURCE_DIR)/%.c
libtestfloat.a: $(TF_OBJS_LIB)
fp-bench$(EXESUF): fp-bench.o $(QEMU_SOFTFLOAT_OBJ) $(LIBQEMUUTIL)
clean:
rm -f *.o *.d $(BINARIES)
rm -f *.gcno *.gcda *.gcov
rm -f fp-test$(EXESUF)
rm -f fp-bench$(EXESUF)
rm -f libsoftfloat.a
rm -f libtestfloat.a

630
tests/fp/fp-bench.c Normal file
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@ -0,0 +1,630 @@
/*
* fp-bench.c - A collection of simple floating point microbenchmarks.
*
* Copyright (C) 2018, Emilio G. Cota <cota@braap.org>
*
* License: GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_POISON_H
#error Must define HW_POISON_H to work around TARGET_* poisoning
#endif
#include "qemu/osdep.h"
#include <math.h>
#include <fenv.h>
#include "qemu/timer.h"
#include "fpu/softfloat.h"
/* amortize the computation of random inputs */
#define OPS_PER_ITER 50000
#define MAX_OPERANDS 3
#define SEED_A 0xdeadfacedeadface
#define SEED_B 0xbadc0feebadc0fee
#define SEED_C 0xbeefdeadbeefdead
enum op {
OP_ADD,
OP_SUB,
OP_MUL,
OP_DIV,
OP_FMA,
OP_SQRT,
OP_CMP,
OP_MAX_NR,
};
static const char * const op_names[] = {
[OP_ADD] = "add",
[OP_SUB] = "sub",
[OP_MUL] = "mul",
[OP_DIV] = "div",
[OP_FMA] = "mulAdd",
[OP_SQRT] = "sqrt",
[OP_CMP] = "cmp",
[OP_MAX_NR] = NULL,
};
enum precision {
PREC_SINGLE,
PREC_DOUBLE,
PREC_FLOAT32,
PREC_FLOAT64,
PREC_MAX_NR,
};
enum rounding {
ROUND_EVEN,
ROUND_ZERO,
ROUND_DOWN,
ROUND_UP,
ROUND_TIEAWAY,
N_ROUND_MODES,
};
static const char * const round_names[] = {
[ROUND_EVEN] = "even",
[ROUND_ZERO] = "zero",
[ROUND_DOWN] = "down",
[ROUND_UP] = "up",
[ROUND_TIEAWAY] = "tieaway",
};
enum tester {
TESTER_SOFT,
TESTER_HOST,
TESTER_MAX_NR,
};
static const char * const tester_names[] = {
[TESTER_SOFT] = "soft",
[TESTER_HOST] = "host",
[TESTER_MAX_NR] = NULL,
};
union fp {
float f;
double d;
float32 f32;
float64 f64;
uint64_t u64;
};
struct op_state;
typedef float (*float_func_t)(const struct op_state *s);
typedef double (*double_func_t)(const struct op_state *s);
union fp_func {
float_func_t float_func;
double_func_t double_func;
};
typedef void (*bench_func_t)(void);
struct op_desc {
const char * const name;
};
#define DEFAULT_DURATION_SECS 1
static uint64_t random_ops[MAX_OPERANDS] = {
SEED_A, SEED_B, SEED_C,
};
static float_status soft_status;
static enum precision precision;
static enum op operation;
static enum tester tester;
static uint64_t n_completed_ops;
static unsigned int duration = DEFAULT_DURATION_SECS;
static int64_t ns_elapsed;
/* disable optimizations with volatile */
static volatile union fp res;
/*
* From: https://en.wikipedia.org/wiki/Xorshift
* This is faster than rand_r(), and gives us a wider range (RAND_MAX is only
* guaranteed to be >= INT_MAX).
*/
static uint64_t xorshift64star(uint64_t x)
{
x ^= x >> 12; /* a */
x ^= x << 25; /* b */
x ^= x >> 27; /* c */
return x * UINT64_C(2685821657736338717);
}
static void update_random_ops(int n_ops, enum precision prec)
{
int i;
for (i = 0; i < n_ops; i++) {
uint64_t r = random_ops[i];
if (prec == PREC_SINGLE || PREC_FLOAT32) {
do {
r = xorshift64star(r);
} while (!float32_is_normal(r));
} else if (prec == PREC_DOUBLE || PREC_FLOAT64) {
do {
r = xorshift64star(r);
} while (!float64_is_normal(r));
} else {
g_assert_not_reached();
}
random_ops[i] = r;
}
}
static void fill_random(union fp *ops, int n_ops, enum precision prec,
bool no_neg)
{
int i;
for (i = 0; i < n_ops; i++) {
switch (prec) {
case PREC_SINGLE:
case PREC_FLOAT32:
ops[i].f32 = make_float32(random_ops[i]);
if (no_neg && float32_is_neg(ops[i].f32)) {
ops[i].f32 = float32_chs(ops[i].f32);
}
/* raise the exponent to limit the frequency of denormal results */
ops[i].f32 |= 0x40000000;
break;
case PREC_DOUBLE:
case PREC_FLOAT64:
ops[i].f64 = make_float64(random_ops[i]);
if (no_neg && float64_is_neg(ops[i].f64)) {
ops[i].f64 = float64_chs(ops[i].f64);
}
/* raise the exponent to limit the frequency of denormal results */
ops[i].f64 |= LIT64(0x4000000000000000);
break;
default:
g_assert_not_reached();
}
}
}
/*
* The main benchmark function. Instead of (ab)using macros, we rely
* on the compiler to unfold this at compile-time.
*/
static void bench(enum precision prec, enum op op, int n_ops, bool no_neg)
{
int64_t tf = get_clock() + duration * 1000000000LL;
while (get_clock() < tf) {
union fp ops[MAX_OPERANDS];
int64_t t0;
int i;
update_random_ops(n_ops, prec);
switch (prec) {
case PREC_SINGLE:
fill_random(ops, n_ops, prec, no_neg);
t0 = get_clock();
for (i = 0; i < OPS_PER_ITER; i++) {
float a = ops[0].f;
float b = ops[1].f;
float c = ops[2].f;
switch (op) {
case OP_ADD:
res.f = a + b;
break;
case OP_SUB:
res.f = a - b;
break;
case OP_MUL:
res.f = a * b;
break;
case OP_DIV:
res.f = a / b;
break;
case OP_FMA:
res.f = fmaf(a, b, c);
break;
case OP_SQRT:
res.f = sqrtf(a);
break;
case OP_CMP:
res.u64 = isgreater(a, b);
break;
default:
g_assert_not_reached();
}
}
break;
case PREC_DOUBLE:
fill_random(ops, n_ops, prec, no_neg);
t0 = get_clock();
for (i = 0; i < OPS_PER_ITER; i++) {
double a = ops[0].d;
double b = ops[1].d;
double c = ops[2].d;
switch (op) {
case OP_ADD:
res.d = a + b;
break;
case OP_SUB:
res.d = a - b;
break;
case OP_MUL:
res.d = a * b;
break;
case OP_DIV:
res.d = a / b;
break;
case OP_FMA:
res.d = fma(a, b, c);
break;
case OP_SQRT:
res.d = sqrt(a);
break;
case OP_CMP:
res.u64 = isgreater(a, b);
break;
default:
g_assert_not_reached();
}
}
break;
case PREC_FLOAT32:
fill_random(ops, n_ops, prec, no_neg);
t0 = get_clock();
for (i = 0; i < OPS_PER_ITER; i++) {
float32 a = ops[0].f32;
float32 b = ops[1].f32;
float32 c = ops[2].f32;
switch (op) {
case OP_ADD:
res.f32 = float32_add(a, b, &soft_status);
break;
case OP_SUB:
res.f32 = float32_sub(a, b, &soft_status);
break;
case OP_MUL:
res.f = float32_mul(a, b, &soft_status);
break;
case OP_DIV:
res.f32 = float32_div(a, b, &soft_status);
break;
case OP_FMA:
res.f32 = float32_muladd(a, b, c, 0, &soft_status);
break;
case OP_SQRT:
res.f32 = float32_sqrt(a, &soft_status);
break;
case OP_CMP:
res.u64 = float32_compare_quiet(a, b, &soft_status);
break;
default:
g_assert_not_reached();
}
}
break;
case PREC_FLOAT64:
fill_random(ops, n_ops, prec, no_neg);
t0 = get_clock();
for (i = 0; i < OPS_PER_ITER; i++) {
float64 a = ops[0].f64;
float64 b = ops[1].f64;
float64 c = ops[2].f64;
switch (op) {
case OP_ADD:
res.f64 = float64_add(a, b, &soft_status);
break;
case OP_SUB:
res.f64 = float64_sub(a, b, &soft_status);
break;
case OP_MUL:
res.f = float64_mul(a, b, &soft_status);
break;
case OP_DIV:
res.f64 = float64_div(a, b, &soft_status);
break;
case OP_FMA:
res.f64 = float64_muladd(a, b, c, 0, &soft_status);
break;
case OP_SQRT:
res.f64 = float64_sqrt(a, &soft_status);
break;
case OP_CMP:
res.u64 = float64_compare_quiet(a, b, &soft_status);
break;
default:
g_assert_not_reached();
}
}
break;
default:
g_assert_not_reached();
}
ns_elapsed += get_clock() - t0;
n_completed_ops += OPS_PER_ITER;
}
}
#define GEN_BENCH(name, type, prec, op, n_ops) \
static void __attribute__((flatten)) name(void) \
{ \
bench(prec, op, n_ops, false); \
}
#define GEN_BENCH_NO_NEG(name, type, prec, op, n_ops) \
static void __attribute__((flatten)) name(void) \
{ \
bench(prec, op, n_ops, true); \
}
#define GEN_BENCH_ALL_TYPES(opname, op, n_ops) \
GEN_BENCH(bench_ ## opname ## _float, float, PREC_SINGLE, op, n_ops) \
GEN_BENCH(bench_ ## opname ## _double, double, PREC_DOUBLE, op, n_ops) \
GEN_BENCH(bench_ ## opname ## _float32, float32, PREC_FLOAT32, op, n_ops) \
GEN_BENCH(bench_ ## opname ## _float64, float64, PREC_FLOAT64, op, n_ops)
GEN_BENCH_ALL_TYPES(add, OP_ADD, 2)
GEN_BENCH_ALL_TYPES(sub, OP_SUB, 2)
GEN_BENCH_ALL_TYPES(mul, OP_MUL, 2)
GEN_BENCH_ALL_TYPES(div, OP_DIV, 2)
GEN_BENCH_ALL_TYPES(fma, OP_FMA, 3)
GEN_BENCH_ALL_TYPES(cmp, OP_CMP, 2)
#undef GEN_BENCH_ALL_TYPES
#define GEN_BENCH_ALL_TYPES_NO_NEG(name, op, n) \
GEN_BENCH_NO_NEG(bench_ ## name ## _float, float, PREC_SINGLE, op, n) \
GEN_BENCH_NO_NEG(bench_ ## name ## _double, double, PREC_DOUBLE, op, n) \
GEN_BENCH_NO_NEG(bench_ ## name ## _float32, float32, PREC_FLOAT32, op, n) \
GEN_BENCH_NO_NEG(bench_ ## name ## _float64, float64, PREC_FLOAT64, op, n)
GEN_BENCH_ALL_TYPES_NO_NEG(sqrt, OP_SQRT, 1)
#undef GEN_BENCH_ALL_TYPES_NO_NEG
#undef GEN_BENCH_NO_NEG
#undef GEN_BENCH
#define GEN_BENCH_FUNCS(opname, op) \
[op] = { \
[PREC_SINGLE] = bench_ ## opname ## _float, \
[PREC_DOUBLE] = bench_ ## opname ## _double, \
[PREC_FLOAT32] = bench_ ## opname ## _float32, \
[PREC_FLOAT64] = bench_ ## opname ## _float64, \
}
static const bench_func_t bench_funcs[OP_MAX_NR][PREC_MAX_NR] = {
GEN_BENCH_FUNCS(add, OP_ADD),
GEN_BENCH_FUNCS(sub, OP_SUB),
GEN_BENCH_FUNCS(mul, OP_MUL),
GEN_BENCH_FUNCS(div, OP_DIV),
GEN_BENCH_FUNCS(fma, OP_FMA),
GEN_BENCH_FUNCS(sqrt, OP_SQRT),
GEN_BENCH_FUNCS(cmp, OP_CMP),
};
#undef GEN_BENCH_FUNCS
static void run_bench(void)
{
bench_func_t f;
f = bench_funcs[operation][precision];
g_assert(f);
f();
}
/* @arr must be NULL-terminated */
static int find_name(const char * const *arr, const char *name)
{
int i;
for (i = 0; arr[i] != NULL; i++) {
if (strcmp(name, arr[i]) == 0) {
return i;
}
}
return -1;
}
static void usage_complete(int argc, char *argv[])
{
gchar *op_list = g_strjoinv(", ", (gchar **)op_names);
gchar *tester_list = g_strjoinv(", ", (gchar **)tester_names);
fprintf(stderr, "Usage: %s [options]\n", argv[0]);
fprintf(stderr, "options:\n");
fprintf(stderr, " -d = duration, in seconds. Default: %d\n",
DEFAULT_DURATION_SECS);
fprintf(stderr, " -h = show this help message.\n");
fprintf(stderr, " -o = floating point operation (%s). Default: %s\n",
op_list, op_names[0]);
fprintf(stderr, " -p = floating point precision (single, double). "
"Default: single\n");
fprintf(stderr, " -r = rounding mode (even, zero, down, up, tieaway). "
"Default: even\n");
fprintf(stderr, " -t = tester (%s). Default: %s\n",
tester_list, tester_names[0]);
fprintf(stderr, " -z = flush inputs to zero (soft tester only). "
"Default: disabled\n");
fprintf(stderr, " -Z = flush output to zero (soft tester only). "
"Default: disabled\n");
g_free(tester_list);
g_free(op_list);
}
static int round_name_to_mode(const char *name)
{
int i;
for (i = 0; i < N_ROUND_MODES; i++) {
if (!strcmp(round_names[i], name)) {
return i;
}
}
return -1;
}
static void QEMU_NORETURN die_host_rounding(enum rounding rounding)
{
fprintf(stderr, "fatal: '%s' rounding not supported on this host\n",
round_names[rounding]);
exit(EXIT_FAILURE);
}
static void set_host_precision(enum rounding rounding)
{
int rhost;
switch (rounding) {
case ROUND_EVEN:
rhost = FE_TONEAREST;
break;
case ROUND_ZERO:
rhost = FE_TOWARDZERO;
break;
case ROUND_DOWN:
rhost = FE_DOWNWARD;
break;
case ROUND_UP:
rhost = FE_UPWARD;
break;
case ROUND_TIEAWAY:
die_host_rounding(rounding);
return;
default:
g_assert_not_reached();
}
if (fesetround(rhost)) {
die_host_rounding(rounding);
}
}
static void set_soft_precision(enum rounding rounding)
{
signed char mode;
switch (rounding) {
case ROUND_EVEN:
mode = float_round_nearest_even;
break;
case ROUND_ZERO:
mode = float_round_to_zero;
break;
case ROUND_DOWN:
mode = float_round_down;
break;
case ROUND_UP:
mode = float_round_up;
break;
case ROUND_TIEAWAY:
mode = float_round_ties_away;
break;
default:
g_assert_not_reached();
}
soft_status.float_rounding_mode = mode;
}
static void parse_args(int argc, char *argv[])
{
int c;
int val;
int rounding = ROUND_EVEN;
for (;;) {
c = getopt(argc, argv, "d:ho:p:r:t:zZ");
if (c < 0) {
break;
}
switch (c) {
case 'd':
duration = atoi(optarg);
break;
case 'h':
usage_complete(argc, argv);
exit(EXIT_SUCCESS);
case 'o':
val = find_name(op_names, optarg);
if (val < 0) {
fprintf(stderr, "Unsupported op '%s'\n", optarg);
exit(EXIT_FAILURE);
}
operation = val;
break;
case 'p':
if (!strcmp(optarg, "single")) {
precision = PREC_SINGLE;
} else if (!strcmp(optarg, "double")) {
precision = PREC_DOUBLE;
} else {
fprintf(stderr, "Unsupported precision '%s'\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 'r':
rounding = round_name_to_mode(optarg);
if (rounding < 0) {
fprintf(stderr, "fatal: invalid rounding mode '%s'\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 't':
val = find_name(tester_names, optarg);
if (val < 0) {
fprintf(stderr, "Unsupported tester '%s'\n", optarg);
exit(EXIT_FAILURE);
}
tester = val;
break;
case 'z':
soft_status.flush_inputs_to_zero = 1;
break;
case 'Z':
soft_status.flush_to_zero = 1;
break;
}
}
/* set precision and rounding mode based on the tester */
switch (tester) {
case TESTER_HOST:
set_host_precision(rounding);
break;
case TESTER_SOFT:
set_soft_precision(rounding);
switch (precision) {
case PREC_SINGLE:
precision = PREC_FLOAT32;
break;
case PREC_DOUBLE:
precision = PREC_FLOAT64;
break;
default:
g_assert_not_reached();
}
break;
default:
g_assert_not_reached();
}
}
static void pr_stats(void)
{
printf("%.2f MFlops\n", (double)n_completed_ops / ns_elapsed * 1e3);
}
int main(int argc, char *argv[])
{
parse_args(argc, argv);
run_bench();
pr_stats();
return 0;
}