diff options
| author | Martin Storsjö <martin@martin.st> | 2019-11-13 12:09:05 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2020-03-26 13:31:23 +0300 |
| commit | 641ef4cc9fa2a12d53be2e75e9690e7b8ff4e605 (patch) | |
| tree | dc7291072b0ebab231380c20cb4761747d02745a /src/arm | |
| parent | ba64f052353906398cf78e79bab7fbb8c468b002 (diff) | |
arm64: ipred: Avoid data dependencies with consecutive dup instructions
This is around one cycle faster.
Diffstat (limited to 'src/arm')
| -rw-r--r-- | src/arm/64/ipred.S | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/src/arm/64/ipred.S b/src/arm/64/ipred.S index 96e88f4..6b77535 100644 --- a/src/arm/64/ipred.S +++ b/src/arm/64/ipred.S @@ -608,7 +608,7 @@ L(ipred_dc_w32): cmp w4, #32 add v0.4h, v0.4h, v1.4h add v0.4h, v0.4h, v2.4h - ushl v0.4h, v0.4h, v17.4h + ushl v4.4h, v0.4h, v17.4h b.eq 1f // h = 8/16/64 cmp w4, #8 @@ -616,10 +616,10 @@ L(ipred_dc_w32): mov w17, #(0x5556/2) csel w16, w16, w17, eq dup v16.4h, w16 - sqdmulh v0.4h, v0.4h, v16.4h + sqdmulh v4.4h, v4.4h, v16.4h 1: - dup v0.16b, v0.b[0] - dup v1.16b, v0.b[0] + dup v0.16b, v4.b[0] + dup v1.16b, v4.b[0] 2: st1 {v0.16b, v1.16b}, [x0], x1 st1 {v0.16b, v1.16b}, [x6], x1 @@ -656,19 +656,19 @@ L(ipred_dc_w64): cmp w4, #64 add v0.4h, v0.4h, v1.4h add v0.4h, v0.4h, v3.4h - ushl v0.4h, v0.4h, v17.4h + ushl v4.4h, v0.4h, v17.4h b.eq 1f // h = 16/32 mov w16, #(0x5556/2) movk w16, #(0x3334/2), lsl #16 lsr w16, w16, w4 dup v16.4h, w16 - sqdmulh v0.4h, v0.4h, v16.4h + sqdmulh v4.4h, v4.4h, v16.4h 1: - dup v0.16b, v0.b[0] - dup v1.16b, v0.b[0] - dup v2.16b, v0.b[0] - dup v3.16b, v0.b[0] + dup v0.16b, v4.b[0] + dup v1.16b, v4.b[0] + dup v2.16b, v4.b[0] + dup v3.16b, v4.b[0] 2: st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x0], x1 st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [x6], x1 |