On 4/24/24 12:22, Robin Dapp wrote:
> The dynamic icounts looks sane (vs. Apr 10 snapshot) except for a
>> regression in x264 which is likely independent of the chaos going on.
>>
>> Apr 10 | Apr 23 |
>> 109f1b28fc94 | 6f0a646dd2fc |
>> ----------------+-----------------+--------
>> 276,584,692,883 | 277,816,987,018 | -0.45%
>> 913,452,236,000 | 927,291,935,180 | -1.52%
>> 903,916,092,805 | 915,364,006,176 | -1.27%
> x264 uses widening arithmetic so it could be the reverts.
> Can you compare the hot functions (e.g. x264_pixel_sad_16x16)
Function old new delta
x264_pixel_sad_x4_16x8.lto_priv 5188 5288 +100
x264_pixel_sad_x4_8x16.lto_priv 5844 5924 +80
x264_pixel_sad_x3_16x8.lto_priv 3904 3980 +76
x264_pixel_sad_x4_16x16.lto_priv 834 898 +64
x264_pixel_sad_x3_8x16.lto_priv 4408 4468 +60
x264_pixel_sad_x4_8x8.lto_priv 3010 3058 +48
x264_pixel_sad_x3_8x8.lto_priv 2290 2338 +48
...
...
x264_pixel_sad_x4_4x8.lto_priv 1366 1362 -4
x264_pixel_sad_x4_4x4.lto_priv 716 712 -4
x264_pixel_sad_4x8.lto_priv 332 328 -4
x264_pixel_sad_4x4.lto_priv 172 168 -4
hpel_filter.lto_priv 984 980 -4
> if anything stands out surrounding the vwadd.wv for example?
Yeah it does: not specifically in the routine you mentioned above but
in its various brethren: see attached objdump for
x264_pixel_sad_x4_16x16 () for the 2 cases.
-Vineet
0000000000021872 <x264_pixel_sad_x4_16x16.lto_priv.0>:
21872: vsetivli zero,4,e32,m1,ta,ma
21876: vmv.v.i v5,0
2187a: add sp,sp,-32
2187c: add t4,a0,4
21880: vmv1r.v v7,v5
21884: vmv1r.v v8,v5
21888: vmv1r.v v9,v5
2188c: vmv1r.v v6,v5
21890: add t5,a0,8
21894: add t6,a0,12
21898: sd s0,24(sp)
2189a: sd s1,16(sp)
2189c: mv s0,a6
2189e: sd s2,8(sp)
218a0: sd s3,0(sp)
218a2: mv a6,t4
218a4: mv t2,t5
218a6: mv t0,t6
218a8: mv t1,a0
218aa: add a7,a0,256
218ae: mv t3,a0
218b0: vsetvli zero,zero,e8,mf4,ta,ma
218b4: add s3,a1,4
218b8: add s2,a1,8
218bc: vle8.v v3,(s3)
218c0: vle8.v v14,(a6)
218c4: vle8.v v2,(s2)
218c8: vle8.v v13,(t2)
218cc: add s1,a1,12
218d0: vle8.v v12,(t0)
218d4: vle8.v v11,(t3)
218d8: vle8.v v10,(a1)
218dc: vle8.v v1,(s1)
218e0: vwsubu.vv v4,v14,v3
218e4: vwsubu.vv v3,v13,v2
218e8: add t3,t3,16
218ea: add a6,a6,16
218ec: add t2,t2,16
218ee: vwsubu.vv v2,v12,v1
218f2: vwsubu.vv v1,v11,v10
218f6: vsetvli zero,zero,e16,mf2,ta,mu
218fa: vmsle.vi v0,v4,-1
218fe: vmsle.vi v12,v3,-1
21902: vmsle.vi v11,v2,-1
21906: vneg.v v4,v4,v0.t
2190a: vmv1r.v v0,v12
2190e: vmsle.vi v10,v1,-1
21912: vwadd.wv v9,v9,v4
21916: vneg.v v3,v3,v0.t
2191a: vmv1r.v v0,v11
2191e: add t0,t0,16
21920: vwadd.wv v8,v8,v3
21924: vneg.v v2,v2,v0.t
21928: vmv1r.v v0,v10
2192c: add a1,a1,a5
2192e: vwadd.wv v7,v7,v2
21932: vneg.v v1,v1,v0.t
21936: vwadd.wv v6,v6,v1
2193a: bne t3,a7,218b0 <x264_pixel_sad_x4_16x16.lto_priv.0+0x3e>
2193e: vsetvli zero,zero,e32,m1,ta,ma
21942: vadd.vv v1,v6,v9
21946: li a6,0
21948: vmv.s.x v2,a6
2194c: vadd.vv v1,v1,v8
21950: vmv1r.v v9,v5
21954: vmv1r.v v8,v5
21958: vadd.vv v1,v1,v7
2195c: vmv1r.v v6,v5
21960: vmv1r.v v7,v5
21964: vredsum.vs v1,v1,v2
21968: mv t2,t6
2196a: mv t0,t5
2196c: mv t3,t4
2196e: mv a1,a0
21970: vmv.x.s a6,v1
21974: sw a6,0(s0)
21978: vsetvli zero,zero,e8,mf4,ta,ma
2197c: add s2,a2,4
21980: add s1,a2,8
21984: vle8.v v3,(s2)
21988: vle8.v v14,(t3)
2198c: vle8.v v2,(s1)
21990: vle8.v v13,(t0)
21994: add a6,a2,12
21998: vle8.v v12,(t2)
2199c: vle8.v v11,(a1)
219a0: vle8.v v10,(a2)
219a4: vle8.v v1,(a6)
219a8: vwsubu.vv v4,v14,v3
219ac: vwsubu.vv v3,v13,v2
219b0: add a1,a1,16
219b2: add t3,t3,16
219b4: add t0,t0,16
219b6: vwsubu.vv v2,v12,v1
219ba: vwsubu.vv v1,v11,v10
219be: vsetvli zero,zero,e16,mf2,ta,mu
219c2: vmsle.vi v0,v4,-1
219c6: vmsle.vi v12,v3,-1
219ca: vmsle.vi v11,v2,-1
219ce: vneg.v v4,v4,v0.t
219d2: vmv1r.v v0,v12
219d6: vmsle.vi v10,v1,-1
219da: vwadd.wv v9,v9,v4
219de: vneg.v v3,v3,v0.t
219e2: vmv1r.v v0,v11
219e6: add t2,t2,16
219e8: vwadd.wv v7,v7,v3
219ec: vneg.v v2,v2,v0.t
219f0: vmv1r.v v0,v10
219f4: add a2,a2,a5
219f6: vwadd.wv v8,v8,v2
219fa: vneg.v v1,v1,v0.t
219fe: vwadd.wv v6,v6,v1
21a02: bne a1,a7,21978 <x264_pixel_sad_x4_16x16.lto_priv.0+0x106>
21a06: vsetvli zero,zero,e32,m1,ta,ma
21a0a: vadd.vv v1,v6,v9
21a0e: li a1,0
21a10: vmv.s.x v2,a1
21a14: vadd.vv v1,v1,v7
21a18: vmv1r.v v9,v5
21a1c: vmv1r.v v7,v5
21a20: vadd.vv v1,v1,v8
21a24: vmv1r.v v6,v5
21a28: vmv1r.v v8,v5
21a2c: vredsum.vs v1,v1,v2
21a30: mv a2,a0
21a32: mv t3,t6
21a34: mv a0,t5
21a36: mv a1,t4
21a38: vmv.x.s a6,v1
21a3c: sw a6,4(s0)
21a40: vsetvli zero,zero,e8,mf4,ta,ma
21a44: add t2,a3,4
21a48: add t0,a3,8
21a4c: vle8.v v3,(t2)
21a50: vle8.v v14,(a1)
21a54: vle8.v v2,(t0)
21a58: vle8.v v13,(a0)
21a5c: add a6,a3,12
21a60: vle8.v v12,(t3)
21a64: vle8.v v11,(a2)
21a68: vle8.v v10,(a3)
21a6c: vle8.v v1,(a6)
21a70: vwsubu.vv v4,v14,v3
21a74: vwsubu.vv v3,v13,v2
21a78: add a2,a2,16
21a7a: add a1,a1,16
21a7c: add a0,a0,16
21a7e: vwsubu.vv v2,v12,v1
21a82: vwsubu.vv v1,v11,v10
21a86: vsetvli zero,zero,e16,mf2,ta,mu
21a8a: vmsle.vi v0,v4,-1
21a8e: vmsle.vi v12,v3,-1
21a92: vmsle.vi v11,v2,-1
21a96: vneg.v v4,v4,v0.t
21a9a: vmv1r.v v0,v12
21a9e: vmsle.vi v10,v1,-1
21aa2: vwadd.wv v9,v9,v4
21aa6: vneg.v v3,v3,v0.t
21aaa: vmv1r.v v0,v11
21aae: add t3,t3,16
21ab0: vwadd.wv v8,v8,v3
21ab4: vneg.v v2,v2,v0.t
21ab8: vmv1r.v v0,v10
21abc: add a3,a3,a5
21abe: vwadd.wv v7,v7,v2
21ac2: vneg.v v1,v1,v0.t
21ac6: vwadd.wv v6,v6,v1
21aca: bne a7,a2,21a40 <x264_pixel_sad_x4_16x16.lto_priv.0+0x1ce>
21ace: vsetvli zero,zero,e32,m1,ta,ma
21ad2: vadd.vv v1,v6,v9
21ad6: li a2,0
21ad8: vmv.s.x v2,a2
21adc: vadd.vv v1,v1,v8
21ae0: vmv1r.v v6,v5
21ae4: vmv1r.v v8,v5
21ae8: vadd.vv v1,v1,v7
21aec: vmv1r.v v7,v5
21af0: vredsum.vs v1,v1,v2
21af4: vmv.x.s a3,v1
21af8: sw a3,8(s0)
21afa: vsetvli zero,zero,e8,mf4,ta,ma
21afe: add a1,a4,4
21b02: add a2,a4,8
21b06: vle8.v v3,(a1)
21b0a: vle8.v v13,(t4)
21b0e: vle8.v v2,(a2)
21b12: vle8.v v12,(t5)
21b16: add a3,a4,12
21b1a: vle8.v v11,(t6)
21b1e: vle8.v v10,(t1)
21b22: vle8.v v9,(a4)
21b26: vle8.v v1,(a3)
21b2a: vwsubu.vv v4,v13,v3
21b2e: vwsubu.vv v3,v12,v2
21b32: add t1,t1,16
21b34: add t4,t4,16
21b36: add t5,t5,16
21b38: vwsubu.vv v2,v11,v1
21b3c: vwsubu.vv v1,v10,v9
21b40: vsetvli zero,zero,e16,mf2,ta,mu
21b44: vmsle.vi v0,v4,-1
21b48: vmsle.vi v11,v3,-1
21b4c: vmsle.vi v10,v2,-1
21b50: vneg.v v4,v4,v0.t
21b54: vmv1r.v v0,v11
21b58: vmsle.vi v9,v1,-1
21b5c: vwadd.wv v8,v8,v4
21b60: vneg.v v3,v3,v0.t
21b64: vmv1r.v v0,v10
21b68: add t6,t6,16
21b6a: vwadd.wv v7,v7,v3
21b6e: vneg.v v2,v2,v0.t
21b72: vmv1r.v v0,v9
21b76: add a4,a4,a5
21b78: vwadd.wv v5,v5,v2
21b7c: vneg.v v1,v1,v0.t
21b80: vwadd.wv v6,v6,v1
21b84: bne a7,t1,21afa <x264_pixel_sad_x4_16x16.lto_priv.0+0x288>
21b88: vsetvli zero,zero,e32,m1,ta,ma
21b8c: vadd.vv v1,v6,v8
21b90: li a4,0
21b92: vmv.s.x v2,a4
21b96: vadd.vv v1,v1,v7
21b9a: vadd.vv v1,v1,v5
21b9e: vredsum.vs v1,v1,v2
21ba2: vmv.x.s a5,v1
21ba6: sw a5,12(s0)
21ba8: ld s0,24(sp)
21baa: ld s1,16(sp)
21bac: ld s2,8(sp)
21bae: ld s3,0(sp)
21bb0: add sp,sp,32
21bb2: ret
0000000000021892 <x264_pixel_sad_x4_16x16.lto_priv.0>:
21892: vsetivli zero,4,e32,m1,ta,ma
21896: vmv.v.i v5,0
2189a: add sp,sp,-32
2189c: add t4,a0,4
218a0: vmv1r.v v7,v5
218a4: vmv1r.v v8,v5
218a8: vmv1r.v v9,v5
218ac: vmv1r.v v6,v5
218b0: add t5,a0,8
218b4: add t6,a0,12
218b8: sd s0,24(sp)
218ba: sd s1,16(sp)
218bc: mv s0,a6
218be: sd s2,8(sp)
218c0: sd s3,0(sp)
218c2: mv a6,t4
218c4: mv t2,t5
218c6: mv t0,t6
218c8: mv t1,a0
218ca: add a7,a0,256
218ce: mv t3,a0
218d0: vsetvli zero,zero,e8,mf4,ta,ma
218d4: add s3,a1,4
218d8: add s2,a1,8
218dc: vle8.v v3,(s3)
218e0: vle8.v v14,(a6)
218e4: vle8.v v2,(s2)
218e8: vle8.v v13,(t2)
218ec: add s1,a1,12
218f0: vle8.v v12,(t0)
218f4: vle8.v v11,(t3)
218f8: vle8.v v10,(a1)
218fc: vle8.v v1,(s1)
21900: vwsubu.vv v4,v14,v3
21904: vwsubu.vv v3,v13,v2
21908: add t3,t3,16
2190a: add a6,a6,16
2190c: add t2,t2,16
2190e: vwsubu.vv v2,v12,v1
21912: vwsubu.vv v1,v11,v10
21916: vsetvli zero,zero,e16,mf2,ta,mu
2191a: vmsle.vi v0,v4,-1
2191e: vmsle.vi v12,v3,-1
21922: vmsle.vi v11,v2,-1
21926: vneg.v v4,v4,v0.t
2192a: vmv1r.v v0,v12
2192e: vmsle.vi v10,v1,-1
21932: add t0,t0,16
21934: vneg.v v3,v3,v0.t
21938: vmv1r.v v0,v11
2193c: add a1,a1,a5
2193e: vneg.v v2,v2,v0.t
21942: vmv1r.v v0,v10
21946: vmv1r.v v10,v9
2194a: vneg.v v1,v1,v0.t
2194e: vwadd.wv v9,v10,v4
21952: vmv1r.v v4,v8
21956: vwadd.wv v8,v4,v3
2195a: vmv1r.v v3,v7
2195e: vwadd.wv v7,v3,v2
21962: vmv1r.v v2,v6
21966: vwadd.wv v6,v2,v1
2196a: bne t3,a7,218d0 <x264_pixel_sad_x4_16x16.lto_priv.0+0x3e>
2196e: vsetvli zero,zero,e32,m1,ta,ma
21972: vadd.vv v1,v6,v9
21976: li a6,0
21978: vmv.s.x v2,a6
2197c: vadd.vv v1,v1,v8
21980: vmv1r.v v9,v5
21984: vmv1r.v v8,v5
21988: vadd.vv v1,v1,v7
2198c: vmv1r.v v6,v5
21990: vmv1r.v v7,v5
21994: vredsum.vs v1,v1,v2
21998: mv t2,t6
2199a: mv t0,t5
2199c: mv t3,t4
2199e: mv a1,a0
219a0: vmv.x.s a6,v1
219a4: sw a6,0(s0)
219a8: vsetvli zero,zero,e8,mf4,ta,ma
219ac: add s2,a2,4
219b0: add s1,a2,8
219b4: vle8.v v3,(s2)
219b8: vle8.v v14,(t3)
219bc: vle8.v v2,(s1)
219c0: vle8.v v13,(t0)
219c4: add a6,a2,12
219c8: vle8.v v12,(t2)
219cc: vle8.v v11,(a1)
219d0: vle8.v v10,(a2)
219d4: vle8.v v1,(a6)
219d8: vwsubu.vv v4,v14,v3
219dc: vwsubu.vv v3,v13,v2
219e0: add a1,a1,16
219e2: add t3,t3,16
219e4: add t0,t0,16
219e6: vwsubu.vv v2,v12,v1
219ea: vwsubu.vv v1,v11,v10
219ee: vsetvli zero,zero,e16,mf2,ta,mu
219f2: vmsle.vi v0,v4,-1
219f6: vmsle.vi v12,v3,-1
219fa: vmsle.vi v11,v2,-1
219fe: vneg.v v4,v4,v0.t
21a02: vmv1r.v v0,v12
21a06: vmsle.vi v10,v1,-1
21a0a: add t2,t2,16
21a0c: vneg.v v3,v3,v0.t
21a10: vmv1r.v v0,v11
21a14: add a2,a2,a5
21a16: vneg.v v2,v2,v0.t
21a1a: vmv1r.v v0,v10
21a1e: vmv1r.v v10,v9
21a22: vneg.v v1,v1,v0.t
21a26: vwadd.wv v9,v10,v4
21a2a: vmv1r.v v4,v7
21a2e: vwadd.wv v7,v4,v3
21a32: vmv1r.v v3,v8
21a36: vwadd.wv v8,v3,v2
21a3a: vmv1r.v v2,v6
21a3e: vwadd.wv v6,v2,v1
21a42: bne a1,a7,219a8 <x264_pixel_sad_x4_16x16.lto_priv.0+0x116>
21a46: vsetvli zero,zero,e32,m1,ta,ma
21a4a: vadd.vv v1,v6,v9
21a4e: li a1,0
21a50: vmv.s.x v2,a1
21a54: vadd.vv v1,v1,v7
21a58: vmv1r.v v9,v5
21a5c: vmv1r.v v7,v5
21a60: vadd.vv v1,v1,v8
21a64: vmv1r.v v6,v5
21a68: vmv1r.v v8,v5
21a6c: vredsum.vs v1,v1,v2
21a70: mv a2,a0
21a72: mv t3,t6
21a74: mv a0,t5
21a76: mv a1,t4
21a78: vmv.x.s a6,v1
21a7c: sw a6,4(s0)
21a80: vsetvli zero,zero,e8,mf4,ta,ma
21a84: add t2,a3,4
21a88: add t0,a3,8
21a8c: vle8.v v3,(t2)
21a90: vle8.v v14,(a1)
21a94: vle8.v v2,(t0)
21a98: vle8.v v13,(a0)
21a9c: add a6,a3,12
21aa0: vle8.v v12,(t3)
21aa4: vle8.v v11,(a2)
21aa8: vle8.v v10,(a3)
21aac: vle8.v v1,(a6)
21ab0: vwsubu.vv v4,v14,v3
21ab4: vwsubu.vv v3,v13,v2
21ab8: add a2,a2,16
21aba: add a1,a1,16
21abc: add a0,a0,16
21abe: vwsubu.vv v2,v12,v1
21ac2: vwsubu.vv v1,v11,v10
21ac6: vsetvli zero,zero,e16,mf2,ta,mu
21aca: vmsle.vi v0,v4,-1
21ace: vmsle.vi v12,v3,-1
21ad2: vmsle.vi v11,v2,-1
21ad6: vneg.v v4,v4,v0.t
21ada: vmv1r.v v0,v12
21ade: vmsle.vi v10,v1,-1
21ae2: add t3,t3,16
21ae4: vneg.v v3,v3,v0.t
21ae8: vmv1r.v v0,v11
21aec: add a3,a3,a5
21aee: vneg.v v2,v2,v0.t
21af2: vmv1r.v v0,v10
21af6: vmv1r.v v10,v9
21afa: vneg.v v1,v1,v0.t
21afe: vwadd.wv v9,v10,v4
21b02: vmv1r.v v4,v8
21b06: vwadd.wv v8,v4,v3
21b0a: vmv1r.v v3,v7
21b0e: vwadd.wv v7,v3,v2
21b12: vmv1r.v v2,v6
21b16: vwadd.wv v6,v2,v1
21b1a: bne a7,a2,21a80 <x264_pixel_sad_x4_16x16.lto_priv.0+0x1ee>
21b1e: vsetvli zero,zero,e32,m1,ta,ma
21b22: vadd.vv v1,v6,v9
21b26: li a2,0
21b28: vmv.s.x v2,a2
21b2c: vadd.vv v1,v1,v8
21b30: vmv1r.v v6,v5
21b34: vmv1r.v v8,v5
21b38: vadd.vv v1,v1,v7
21b3c: vmv1r.v v7,v5
21b40: vredsum.vs v1,v1,v2
21b44: vmv.x.s a3,v1
21b48: sw a3,8(s0)
21b4a: vsetvli zero,zero,e8,mf4,ta,ma
21b4e: add a1,a4,4
21b52: add a2,a4,8
21b56: vle8.v v3,(a1)
21b5a: vle8.v v13,(t4)
21b5e: vle8.v v2,(a2)
21b62: vle8.v v12,(t5)
21b66: add a3,a4,12
21b6a: vle8.v v11,(t6)
21b6e: vle8.v v10,(t1)
21b72: vle8.v v9,(a4)
21b76: vle8.v v1,(a3)
21b7a: vwsubu.vv v4,v13,v3
21b7e: vwsubu.vv v3,v12,v2
21b82: add t1,t1,16
21b84: add t4,t4,16
21b86: add t5,t5,16
21b88: vwsubu.vv v2,v11,v1
21b8c: vwsubu.vv v1,v10,v9
21b90: vsetvli zero,zero,e16,mf2,ta,mu
21b94: vmsle.vi v0,v4,-1
21b98: vmsle.vi v11,v3,-1
21b9c: vmsle.vi v10,v2,-1
21ba0: vneg.v v4,v4,v0.t
21ba4: vmv1r.v v0,v11
21ba8: vmsle.vi v9,v1,-1
21bac: add t6,t6,16
21bae: vneg.v v3,v3,v0.t
21bb2: vmv1r.v v0,v10
21bb6: add a4,a4,a5
21bb8: vneg.v v2,v2,v0.t
21bbc: vmv1r.v v0,v9
21bc0: vmv1r.v v9,v8
21bc4: vneg.v v1,v1,v0.t
21bc8: vwadd.wv v8,v9,v4
21bcc: vmv1r.v v4,v7
21bd0: vwadd.wv v7,v4,v3
21bd4: vmv1r.v v3,v5
21bd8: vwadd.wv v5,v3,v2
21bdc: vmv1r.v v2,v6
21be0: vwadd.wv v6,v2,v1
21be4: bne a7,t1,21b4a <x264_pixel_sad_x4_16x16.lto_priv.0+0x2b8>
21be8: vsetvli zero,zero,e32,m1,ta,ma
21bec: vadd.vv v1,v6,v8
21bf0: li a4,0
21bf2: vmv.s.x v2,a4
21bf6: vadd.vv v1,v1,v7
21bfa: vadd.vv v1,v1,v5
21bfe: vredsum.vs v1,v1,v2
21c02: vmv.x.s a5,v1
21c06: sw a5,12(s0)
21c08: ld s0,24(sp)
21c0a: ld s1,16(sp)
21c0c: ld s2,8(sp)
21c0e: ld s3,0(sp)
21c10: add sp,sp,32
21c12: ret
