diff options
| author | Martin Storsjö <martin@martin.st> | 2020-03-24 00:59:41 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2020-03-26 13:31:23 +0300 |
| commit | 801966ca946661881755a8078661e1c880995e46 (patch) | |
| tree | b87c216a0b7dfb79e3557e845eb175ab60283db8 /src/arm/64 | |
| parent | f481d69b0ffac087504036375d505f4323d7ef5e (diff) | |
arm64: ipred: Use rounded shifts instead of a separate addition
Diffstat (limited to 'src/arm/64')
| -rw-r--r-- | src/arm/64/ipred.S | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/src/arm/64/ipred.S b/src/arm/64/ipred.S index 00a9112..4bd1f8a 100644 --- a/src/arm/64/ipred.S +++ b/src/arm/64/ipred.S @@ -1962,14 +1962,11 @@ function ipred_cfl_ac_420_neon, export=1 clz w9, w9 // ctz(width) clz w10, w10 // ctz(height) add w9, w9, w10 // log2sz - movi v16.4s, #1 add x10, x1, x2 lsl x2, x2, #1 - dup v17.4s, w9 - sshl v16.4s, v16.4s, v17.4s // 1 << log2sz - neg v17.4s, v17.4s // -log2sz - ushr v16.4s, v16.4s, #1 // 1 << (log2sz - 1) + dup v31.4s, w9 mov w9, w6 + neg v31.4s, v31.4s // -log2sz br x7 L(ipred_cfl_ac_420_w4): @@ -2009,8 +2006,7 @@ L(ipred_cfl_ac_420_w4_hpad): add v0.8h, v0.8h, v1.8h uaddlv s0, v0.8h // sum sub x0, x0, w9, uxtw #3 - add v0.2s, v0.2s, v16.2s // sum += 1 << (log2sz - 1) - ushl v4.2s, v0.2s, v17.2s // sum >>= log2sz + urshl v4.2s, v0.2s, v31.2s // (sum + (1 << (log2sz - 1))) >>= log2sz dup v4.8h, v4.h[0] 6: // Subtract dc from ac ld1 {v0.8h, v1.8h}, [x0] @@ -2092,8 +2088,7 @@ L(ipred_cfl_ac_420_w8_calc_subtract_dc): add v0.4s, v0.4s, v2.4s addv s0, v0.4s // sum sub x0, x0, w9, uxtw #4 - add v0.2s, v0.2s, v16.2s // sum += 1 << (log2sz - 1) - ushl v4.2s, v0.2s, v17.2s // sum >>= log2sz + urshl v4.2s, v0.2s, v31.2s // (sum + (1 << (log2sz - 1))) >>= log2sz dup v4.8h, v4.h[0] 6: // Subtract dc from ac ld1 {v0.8h, v1.8h, v2.8h, v3.8h}, [x0] @@ -2269,14 +2264,11 @@ function ipred_cfl_ac_422_neon, export=1 clz w9, w9 // ctz(width) clz w10, w10 // ctz(height) add w9, w9, w10 // log2sz - movi v16.4s, #1 add x10, x1, x2 lsl x2, x2, #1 - dup v17.4s, w9 - sshl v16.4s, v16.4s, v17.4s // 1 << log2sz - neg v17.4s, v17.4s // -log2sz - ushr v16.4s, v16.4s, #1 // 1 << (log2sz - 1) + dup v31.4s, w9 mov w9, w6 + neg v31.4s, v31.4s // -log2sz br x7 L(ipred_cfl_ac_422_w4): |