ref: 83c627165ae5991ac664f5d4d2c6aa7a772ee9a8
parent: f4dac1a30b3893d0ff555d8d87a0be7c4b69866a
author: Martin Storsjö <martin@martin.st>
date: Tue Mar 3 09:49:33 EST 2020
arm64: mc: Use more intuitive lane specifications for loads/stores For loads where we load/store a full or half register (instead of a lanewise load/store), the lane specification in itself doesn't matter, only its size. This doesn't change the generated code, but makes it more readable.
--- a/src/arm/64/mc.S
+++ b/src/arm/64/mc.S
@@ -434,7 +434,7 @@
lsl w1, w1, #1
br x6
4:
- ld1 {v2.d}[0], [x5], #8+ ld1 {v2.8b}, [x5], #8 ld1 {v1.d}[0], [x2], #8 ld1 {v0.s}[0], [x0]subs w4, w4, #2
@@ -448,8 +448,8 @@
b.gt 4b
ret
8:
- ld1 {v2.2d}, [x5], #16- ld1 {v1.2d}, [x2], #16+ ld1 {v2.16b}, [x5], #16+ ld1 {v1.16b}, [x2], #16 ld1 {v0.d}[0], [x0] ld1 {v0.d}[1], [x8]sub v3.16b, v4.16b, v2.16b
@@ -465,13 +465,13 @@
b.gt 8b
ret
16:
- ld1 {v1.2d, v2.2d}, [x5], #32- ld1 {v5.2d, v6.2d}, [x2], #32- ld1 {v0.2d}, [x0]+ ld1 {v1.16b, v2.16b}, [x5], #32+ ld1 {v5.16b, v6.16b}, [x2], #32+ ld1 {v0.16b}, [x0]subs w4, w4, #2
sub v7.16b, v4.16b, v1.16b
sub v20.16b, v4.16b, v2.16b
- ld1 {v3.2d}, [x8]+ ld1 {v3.16b}, [x8]umull v16.8h, v5.8b, v1.8b
umlal v16.8h, v0.8b, v7.8b
umull2 v17.8h, v5.16b, v1.16b
@@ -484,16 +484,16 @@
rshrn2 v18.16b, v17.8h, #6
rshrn v19.8b, v21.8h, #6
rshrn2 v19.16b, v22.8h, #6
- st1 {v18.2d}, [x0], x1- st1 {v19.2d}, [x8], x1+ st1 {v18.16b}, [x0], x1+ st1 {v19.16b}, [x8], x1b.gt 16b
ret
32:
- ld1 {v0.2d, v1.2d, v2.2d, v3.2d}, [x5], #64- ld1 {v16.2d, v17.2d, v18.2d, v19.2d}, [x2], #64- ld1 {v20.2d, v21.2d}, [x0]+ ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x5], #64+ ld1 {v16.16b, v17.16b, v18.16b, v19.16b}, [x2], #64+ ld1 {v20.16b, v21.16b}, [x0]subs w4, w4, #2
- ld1 {v22.2d, v23.2d}, [x8]+ ld1 {v22.16b, v23.16b}, [x8]sub v5.16b, v4.16b, v0.16b
sub v6.16b, v4.16b, v1.16b
sub v30.16b, v4.16b, v2.16b
@@ -522,8 +522,8 @@
rshrn2 v27.16b, v1.8h, #6
rshrn v28.8b, v29.8h, #6
rshrn2 v28.16b, v21.8h, #6
- st1 {v24.2d, v25.2d}, [x0], x1- st1 {v27.2d, v28.2d}, [x8], x1+ st1 {v24.16b, v25.16b}, [x0], x1+ st1 {v27.16b, v28.16b}, [x8], x1b.gt 32b
ret
L(blend_tbl):
@@ -563,7 +563,7 @@
ret
4:
ld2r {v0.8b, v1.8b}, [x5], #2- ld1 {v2.2s}, [x2], #8+ ld1 {v2.8b}, [x2], #8subs w4, w4, #2
ext v0.8b, v0.8b, v1.8b, #4
ld1 {v3.s}[0], [x0]