This knocks off one instruction per row. The effect is probably too small to
be measurable, but might as well be included. The second occurrence of this
sequence doesn't actually benefit at all, but is changed for consistency.
---
pixman/pixman-arm-simd-asm.h | 11 ++++-------
1 files changed, 4 insertions(+), 7 deletions(-)
diff --git a/pixman/pixman-arm-simd-asm.h b/pixman/pixman-arm-simd-asm.h
index 74400c1..3a2c250 100644
--- a/pixman/pixman-arm-simd-asm.h
+++ b/pixman/pixman-arm-simd-asm.h
@@ -741,12 +741,9 @@ fname:
preload_leading_step1 mask_bpp, WK2, MASK
preload_leading_step1 dst_r_bpp, WK3, DST
- tst DST, #15
+ ands WK0, DST, #15
beq 154f
- rsb WK0, DST, #0 /* bits 0-3 = number of leading bytes until
destination aligned */
- .if (src_bpp != 0 && src_bpp != 2*dst_w_bpp) || (mask_bpp != 0 && mask_bpp
!= 2*dst_w_bpp)
- PF and, WK0, WK0, #15
- .endif
+ rsb WK0, WK0, #16 /* bits 0-3 = number of leading bytes until
destination aligned */
preload_leading_step2 src_bpp, src_bpp_shift, WK1, SRC
preload_leading_step2 mask_bpp, mask_bpp_shift, WK2, MASK
@@ -787,9 +784,9 @@ fname:
preload_line 0, dst_r_bpp, dst_bpp_shift, DST
sub X, X, #128/dst_w_bpp /* simplifies inner loop termination
*/
- tst DST, #15
+ ands WK0, DST, #15
beq 164f
- rsb WK0, DST, #0 /* bits 0-3 = number of leading bytes until
destination aligned */
+ rsb WK0, WK0, #16 /* bits 0-3 = number of leading bytes until
destination aligned */
leading_15bytes process_head, process_tail
--
1.7.5.4
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