2009年09鐃緒申10鐃緒申
gcc鐃緒申NEON鐃緒申SIMD命鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃祝�
鐃緒申鐃塾居申鐃緒申鐃叔わ申gcc 4.4.0鐃緒申鐃緒申僂鐃緒申討鐃緒申泙鐃緒申鐃緒申鐃獣と随申鐃緒申鐃緒申gcc鐃塾常申鐃熟わ申鐃緒申鐃初。
2013年06鐃緒申27鐃緒申 ARM鐃緒申NEON鐃緒申SIMD命鐃緒申鐃�gcc鐃塾ワ申鐃緒申鐃夙ベワ申鐃緒申鐃初イ鐃緒申鐃塾削申適鐃緒申鐃叔使わ申鐃緒申法
Android鐃緒申SDK鐃緒申goldfish鐃緒申CPU鐃緒申cortex-A8鐃緒申鐃瞬わ申鐃緒申鐃緒申鐃緒申NEON鐃緒申SIMD命鐃緒申鐃庶す(鐃緒申鐃緒申2) 鐃塾とわ申鐃祝わ申arm_neon.h鐃緒申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃緒申intrinsics鐃緒申箸辰鐃�NEON鐃緒申SIMD命鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃祝￥申鐃緒申鐃�NEON鐃緒申命鐃緒申砲弔鐃緒申鴇楮戮鐃緒申里辰討鐃緒申覆鐃緒申鐃出なわ申泙鐃緒申鵑掘鐃緒申覆砲鐃緒申發緒申離廛鐃緒申鐃緒申鐃準がNEON鐃祝逸申存鐃緒申鐃緒申鐃緒申里砲覆辰討鐃緒申泙鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申魯鐃緒申鐃術ワ申鐃緒申虜鐃重�鐃緒申鐃塾居申能鐃緒申箸辰鐃�NEON鐃緒申SIMD命鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申襯鰹申弔鐃述介しまわ申鐃緒申
鐃緒申鐃緒申鐃緒申SIMD鐃初算鐃塾ワ申鐃緒申廛鐃夙わ申鐃銃わ申鐃緒申淵廛鐃緒申鐃緒申鐃緒申鐃書きまわ申鐃緒申鐃緒申
void vmla(float* a, float* x, float* y, float* z)
{
a[0] = x[0] * y[0] + z[0];
a[1] = x[1] * y[1] + z[1];
a[2] = x[2] * y[2] + z[2];
a[3] = x[3] * y[3] + z[3];
}
鐃緒申鐃緒申鐃緒申伴尊櫃砲鐃�NEON鐃緒申SIMD命鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃殉わ申鐃藷が￥申鐃緒申鐃緒申鐃緒申鐃緒申辰判鐃縦常申鐃緒申鐃�NEON鐃緒申SIMD命鐃潤が鐃緒申鐃緒申鐃緒申鐃緒申鐃処う鐃祝なわ申泙鐃緒申鐃�
鐃楯ワ申鐃緒申箸鐃�
- 鐃緒申鐃緒申鐃暑ー鐃竣で使わ申鐃緒申鐃夙￥申
- 鐃緒申鐃緒申鐃緒申鐃緒申離櫂鐃緒申鵐燭鐃� __restrict鐃緒申鐃緒申属鐃緒申鐃緒申鐃縦わ申鐃銃わ申鐃暑こ鐃夙￥申
鐃塾よう鐃叔わ申鐃緒申
__restrict 鐃熟わ申鐃塾ポワ申鐃藷タわ申他鐃緒申鐃術随申鐃夙重なってわ申鐃淑わ申鐃緒申鐃夙をコワ申僖鐃緒申鐃緒申鐃塾らせ鐃暑た鐃緒申里鐃塾でわ申鐃緒申
鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾わ申鐃淑駕申鐃塾プワ申鐃緒申鐃緒申鐃叔わ申鐃緒申
void vmla2(float* __restrict a, float* __restrict x, float* __restrict y, float* __restrict z)
{
int i;
for (i=0; i< 4; i++) {
a[i] = x[i] * y[i] + z[i];
}
}
鐃緒申鐃緒申鐃�neon0.c 鐃夙わ申鐃緒申鐃春ワ申鐃緒申鐃緒申乏鐃叔種申鐃緒申泙鐃緒申鐃�
鐃緒申鐃藷コワ申僖鐃緒申鐃緒申gcc 4.4.0鐃緒申箸辰討鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申僖鐃緒申襯�鐃竣ワ申鐃緒申鐃熟以駕申鐃塾わ申里鐃縦わ申鐃殉わ申鐃緒申
arm-eabi-gcc -O2 -march=armv7-a -ftree-vectorize -mhard-float -mfloat-abi=softfp -mfpu=neon -mvectorize-with-neon-quad -S neon0.c
鐃緒申鐃緒申鐃緒申鐃曙た鐃緒申鐃緒申鐃宿は以駕申鐃塾とわ申鐃所。
.align 2
.global vmla2
.type vmla2, %function
vmla2:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
orr ip, r1, r0
orr ip, r2, ip
orr ip, r3, ip
tst ip, #15
str r4, [sp, #-4]!
bne .L4
vldmia r1, {d18-d19}
vldmia r2, {d16-d17}
vmul.f32 q8, q9, q8
vldmia r3, {d18-d19}
vadd.f32 q8, q8, q9
vstmia r0, {d16-d17}
.L7:
ldmfd sp!, {r4}
bx lr
.L4:
mov ip, #0
.L6:
add r4, r1, ip
flds s13, [r4, #0]
add r4, r2, ip
flds s14, [r4, #0]
add r4, r3, ip
flds s15, [r4, #0]
fmacs s15, s13, s14
fmrs r4, s15
str r4, [r0, ip] @ float
add ip, ip, #4
cmp ip, #16
bne .L6
b .L7
.size vmla2, .-vmla2
NEON鐃緒申SIMD命鐃潤が鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縮随申鐃叔なわ申鐃緒申鐃処算鐃夙加誌申鐃緒申分鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申離廛鐃緒申鐃緒申鐃緒申任鐃縦常申鐃緒申縫鐃緒申蠅�鐃緒申鐃緒申鐃緒申匹鐃緒申討鐃緒申鐃塾で￥申鐃緒申鐃塾ワ申鐃緒申鐃宿わ申鐃駿縁申鐃緒申慮鐃緒申鐃緒申箸鐃緒申鐃緒申鐃緒申鐃渋�鐃緒申鐃塾わ申鐃盾し鐃緒申泙鐃緒申鵝�まわ申鐃緒申3鐃縦のワ申鐃准ワ申鐃宿のワ申鐃初イ鐃緒申鐃夙わ申鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃�3鐃縦とわ申16鐃出ワ申鐃夙駈申鐃緒申鐃祝わ申鐃緒申箸鐃緒申里鐃�NEON命鐃緒申鐃夙わ申鐃処う鐃祝なってわ申鐃殉わ申鐃緒申鐃緒申味鐃緒申鐃緒申鐃叔わ申鐃緒申
鐃緒申鐃塾ワ申鐃緒申鐃緒申鐃薯参考にわ申鐃緒申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃殉わ申鐃緒申鐃緒申
鐃夙ワ申奪鐃緒申丱奪鐃�URL
鐃夙ワ申奪鐃緒申丱奪鐃緒申鐃緒申鐃�
鐃緒申鐃緒申鐃夙逸申鐃緒申
鐃緒申鐃縦も興味鐃緒申鐃緒申鐃述醐申鐃緒申鐃緒申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃殉わ申鐃緒申
鐃潤イ鐃緒申鐃緒申鐃緒申鐃夙わ申鐃緒申討鐃緒申洞鐃緒申未任鐃緒申鐃�
> -mhard-float -mfloat-abi=softfp
鐃緒申 "-mhard-float" 鐃塾誌申鐃緒申鐃緒申鐃緒申廚任呂覆鐃緒申任鐃緒申腓�鐃緒申鐃緒申
gcc-4.3鐃緒申man鐃薯参照わ申鐃緒申函鐃�
> -mfloat-abi=name
> Specifies which ABI to use for floating point values. Permissible values are: soft, softfp and hard.
>
> soft and hard are equivalent to -msoft-float and -mhard-float respectively.
鐃夙書いてわ申鐃緒申里如鐃�"-mhard-float" 鐃緒申 "-mfloat-abi=hard" 鐃緒申同鐃緒申鐃緒申鐃夙わ申鐃緒申鐃処う鐃緒申鐃緒申鐃薯してわ申鐃殉わ申鐃緒申
-mhard-float鐃熟￥申(Android鐃叔のデフワ申鐃緒申箸任鐃緒申鐃�)鐃緒申-msoft-float鐃夙わ申鐃緒申鐃緒申琉鐃縮ｏ申鐃緒申鐃緒申鐃重�鐃祝誌申鐃所し鐃銃わ申鐃殉わ申鐃緒申
鐃縦わ申鐃叔わ申鐃獣をすわ申函鐃�
-mhard-float鐃緒申弔鐃緒申鐃夙逸申鐃循のわ申鐃緒申鐃緒申 -mfloat-abi=hard 鐃祝なわ申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃�ARM鐃塾ワ申鐃緒申僖鐃緒申鐃叔わ申float鐃緒申ABI鐃緒申hard鐃熟ワ申鐃楯￥申鐃夙わ申鐃緒申討鐃緒申泙鐃緒申鵝�なので￥申必鐃緒申 -mhard-float 鐃緒申鐃緒申蠅件申鐃緒申蕁�-mfloat-abi=softfp 鐃緒申鐃緒申蠅刻申鐃宿�鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃�
鐃緒申鐃祝でてわ申鐃緒申gcc 4.5 鐃叔わ申ARM鐃叔わ申-mfloat-api=hard鐃緒申鐃緒申鐃楯￥申鐃夙わ申鐃緒申鐃処う鐃叔わ申鐃緒申
鐃夙わ申鐃緒申鐃塾は￥申鐃淑駕申鐃塾よう鐃緒申 "-mhard-float" 鐃緒申弔鐃緒申謄鐃緒申鐃術ワ申鐃暑す鐃緒申肇鐃緒申蕁種申砲覆襪鰹申箸鐃緒申鐃盾、分鐃緒申鐃緒申泙鐃緒申鐃�
$ arm-linux-gnueabi-gcc -mhard-float sample.c
sample.c:1: sorry, unimplemented: -mfloat-abi=hard and VFP
> 鐃淑ので￥申必鐃緒申 -mhard-float 鐃緒申鐃緒申蠅件申鐃緒申蕁�-mfloat-abi=softfp 鐃緒申鐃緒申蠅刻申鐃宿�鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃�
鐃夙わ申鐃緒申鐃塾わ申鐃緒申分鐃緒申鐃緒申覆鐃緒申任鐃緒申鐃�
鐃淑駕申鐃塾よう鐃祝￥申"-mfloat-abi=softfp" 鐃緒申 "-mhard-float" 鐃塾緒申鐃瞬わ申鐃緒申鐃緒申鐃舜わ申鐃銃￥申"-mhard-float" 鐃緒申鐃緒申鐃祝誌申鐃獣てわ申鐃緒申函鐃�"-mhard-float"鐃緒申鐃緒申鐃緒申鐃緒申蠅件申鐃緒申箸鐃緒申鐃銃縁申鐃緒申鐃緒申蕁種申砲覆鐃殉わ申鐃緒申
$ arm-linux-gnueabi-gcc -mhard-float -mfloat-abi=softfp sample.c
(鐃緒申鐃初ー鐃淑わ申)
$ arm-linux-gnueabi-gcc -mfloat-abi=softfp -mhard-float sample.c
sample.c:1: sorry, unimplemented: -mfloat-abi=hard and VFP
単鐃祝￥申鐃緒申鐃緒申暴颪い鐃緒申鐃緒申廛鐃緒申鐃緒申望鐃書きわ申鐃緒申討鐃緒申鐃緒申鐃緒申鐃緒申鐃夙思ってわ申鐃緒申鐃塾でわ申鐃緒申鐃緒申鐃緒申鐃緒申
-mhard-float鐃緒申-msoft-float鐃塾わ申鐃曙ぞ鐃緒申法鐃�(float鐃緒申ABI鐃夙わ申鐃緒申)-mfloat-abi=softfp鐃緒申鐃楯わ申鐃緒申存鐃淳わ申鐃緒申
鐃塾ではなわ申鐃緒申
-float-abi=hard or soft or softfp 鐃塾誌申鐃緒申鐃緒申鐃�
鐃緒申鐃緒申鐃緒申鐃薯してわ申鐃緒申里任鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃祝器申鐃純い鐃緒申鐃銃わ申鐃緒申任鐃緒申腓�鐃緒申鐃緒申
鐃緒申鐃緒申鐃緒申鐃緒申鐃宿って醐申鐃緒申个呂辰鐃緒申蠅刻申襪鰹申箸任鐃緒申鐃緒申鐃�gcc鐃塾ワ申鐃緒申鐃緒申鐃銃ワ申鐃緒申鐃純共鐃縮わ申鐃緒申分鐃塾緒申鐃緒申鐃夙わ申鐃緒申 -mhard-float鐃塾ワ申鐃竣ワ申鐃緒申鐃緒申鐃潤し鐃緒申鐃夙わ申鐃緒申鐃緒申鐃緒申的鐃緒申float-abi鐃塾フラグ鐃緒申hard鐃祝ワ申鐃獣トわ申鐃銃わ申鐃銃￥申ARM鐃緒申鐃緒申鐃緒申鐃銃ワ申鐃緒申鐃緒申鐃粛�鐃緒申鐃緒申分鐃塾緒申鐃緒申鐃緒申-mhard-float鐃緒申float-abi=hard鐃緒申鐃夙み刻申錣誌申鬟┘蕁種申砲鐃緒申討鐃緒申鐃緒申鐃緒申鐃緒申鐃夙￥申鐃緒申鐃塾ワ申鐃初ー鐃緒申鐃緒申鐃獣ワ申鐃塾とわ申鐃緒申鐃叔わ申鐃緒申鐃緒申的鐃緒申-mfloat-abi=鐃塾ワ申鐃竣ワ申鐃緒申鐃叔誌申鐃所さ鐃曙た鐃塾わ申鐃緒申鐃緒申的鐃緒申鐃緒申鐃所さ鐃曙た鐃塾わ申鐃熟醐申鐃銃わ申鐃淑わ申鐃淑まわ申鐃熟わ申鐃塾誌申鐃緒申鐃叔は常申鐃藷が残ってわ申鐃淑わ申鐃祝のでわ申鐃順う鐃緒申
PowerPC鐃緒申MIPS鐃叔わ申-mhard-float鐃塾誌申鐃緒申鐃熟�動鐃緒申鐃緒申float-abi=hard鐃祝なわ申曚鐃緒申鐃緒申垤腓�鐃処い鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申蠅�鐃淑わ申鐃塾でわ申鐃緒申鐃緒申ARM鐃緒申鐃緒申鐃緒申鐃獣種申任鐃巡こ鐃緒申鐃緒申鐃緒申鐃夙になってわ申鐃殉わ申鐃緒申
