[Pixman] [PATCH 11/32] armv6: Add in_8888_8 fast path
Ben Avison
bavison at riscosopen.org
Thu Aug 7 09:50:07 PDT 2014
This is used instead of the equivalent C fast path.
lowlevel-blt-bench results, compared to no fast path at all:
Before After
Mean StdDev Mean StdDev Confidence Change
L1 12.4 0.1 117.5 2.3 100.0% +851.2%
L2 9.5 0.1 46.9 2.4 100.0% +393.8%
M 9.6 0.0 61.9 0.9 100.0% +544.0%
HT 7.9 0.0 26.6 0.5 100.0% +238.6%
VT 7.7 0.0 24.2 0.4 100.0% +212.5%
R 7.4 0.0 22.4 0.4 100.0% +204.5%
RT 4.1 0.0 8.7 0.2 100.0% +109.4%
---
pixman/pixman-arm-simd-asm.S | 111 ++++++++++++++++++++++++++++++++++++++++++
pixman/pixman-arm-simd.c | 4 ++
2 files changed, 115 insertions(+), 0 deletions(-)
diff --git a/pixman/pixman-arm-simd-asm.S b/pixman/pixman-arm-simd-asm.S
index 08d6709..6c77fd3 100644
--- a/pixman/pixman-arm-simd-asm.S
+++ b/pixman/pixman-arm-simd-asm.S
@@ -1291,3 +1291,114 @@ generate_composite_function \
over_n_0565_process_tail
/******************************************************************************/
+
+.macro in_8888_8_init
+ SRC0 .req Y
+ SRC1 .req STRIDE_D
+ SRC2 .req STRIDE_S
+ SRC3 .req MASK
+ HALF .req STRIDE_M
+ TMP .req ORIG_W
+ line_saved_regs Y, STRIDE_D, STRIDE_S, ORIG_W
+ ldr SCRATCH, =0x00800080
+ mov HALF, #0x80
+ /* Set GE[3:0] to 0101 so SEL instructions do what we want */
+ uadd8 SCRATCH, SCRATCH, SCRATCH
+ /* Offset the source pointer: we only need the alpha bytes */
+ add SRC, SRC, #3
+.endm
+
+.macro in_8888_8_cleanup
+ .unreq SRC0
+ .unreq SRC1
+ .unreq SRC2
+ .unreq SRC3
+ .unreq HALF
+ .unreq TMP
+.endm
+
+.macro in_8888_8_4pixels_head dst
+ ldr TMP, [DST], #4
+ ldrb SRC0, [SRC], #12
+ ldrb SRC3, [SRC], #-4
+ ldrb SRC2, [SRC], #-4
+ uxtb16 WK&dst, TMP
+ uxtb16 TMP, TMP, ror #8
+ ldrb SRC1, [SRC], #12
+ smlabb SRC0, SRC0, WK&dst, HALF
+ smlabt SRC3, SRC3, TMP, HALF
+ smlabt SRC2, SRC2, WK&dst, HALF
+ smlabb SRC1, SRC1, TMP, HALF
+ orr WK&dst, SRC0, SRC2, lsl #16
+ /* There'd be a stall here if immediately followed by orr, so
+ * fill it with something like a preload if possible */
+.endm
+
+.macro in_8888_8_4pixels_tail dst
+ orr TMP, SRC1, SRC3, lsl #16
+ uxtab16 WK&dst, WK&dst, WK&dst, ror #8
+ uxtab16 TMP, TMP, TMP, ror #8
+ mov WK&dst, WK&dst, ror #8
+ sel WK&dst, WK&dst, TMP
+.endm
+
+.macro in_8888_8_process_head cond, numbytes, firstreg, unaligned_src, unaligned_mask, preload
+ .if numbytes == 1
+ ldrb WK3, [DST], #1
+ ldrb SRC0, [SRC], #4
+ .elseif numbytes == 2
+ ldrb WK3, [DST], #1
+ ldrb SRC0, [SRC], #4
+ ldrb TMP, [DST], #1
+ ldrb SRC1, [SRC], #4
+ .else
+ .if numbytes >= 8
+ .if numbytes == 16
+ in_8888_8_4pixels_head 0
+ in_8888_8_4pixels_tail 0
+ in_8888_8_4pixels_head 1
+ .if preload
+ PF bic, SCRATCH, SRC, #31
+ PF pld, [SCRATCH, #32*prefetch_distance]
+ .endif
+ in_8888_8_4pixels_tail 1
+ .endif
+ in_8888_8_4pixels_head 2
+ in_8888_8_4pixels_tail 2
+ .endif
+ in_8888_8_4pixels_head 3
+ .endif
+.endm
+
+.macro in_8888_8_process_tail cond, numbytes, firstreg
+ .if numbytes == 1
+ smlabb WK3, SRC0, WK3, HALF
+ add WK3, WK3, WK3, lsr #8
+ mov WK3, WK3, lsr #8
+ strb WK3, [DST, #-1]
+ .elseif numbytes == 2
+ smlabb WK3, SRC0, WK3, HALF
+ smlabb TMP, SRC1, TMP, HALF
+ add WK3, WK3, WK3, lsr #8
+ add TMP, TMP, TMP, lsr #8
+ mov WK3, WK3, lsr #8
+ mov TMP, TMP, lsr #8
+ strb WK3, [DST, #-2]
+ strb TMP, [DST, #-1]
+ .else
+ in_8888_8_4pixels_tail 3
+ pixst , numbytes, (4-numbytes/4), DST
+ .endif
+.endm
+
+generate_composite_function \
+ pixman_composite_in_8888_8_asm_armv6, 32, 0, 8, \
+ FLAG_DST_READWRITE | FLAG_BRANCH_OVER | FLAG_PROCESS_DOES_STORE | FLAG_SPILL_LINE_VARS, \
+ 3, /* prefetch distance */ \
+ in_8888_8_init, \
+ nop_macro, /* newline */ \
+ in_8888_8_cleanup, \
+ in_8888_8_process_head, \
+ in_8888_8_process_tail
+
+/******************************************************************************/
diff --git a/pixman/pixman-arm-simd.c b/pixman/pixman-arm-simd.c
index 31f960d..76770bc 100644
--- a/pixman/pixman-arm-simd.c
+++ b/pixman/pixman-arm-simd.c
@@ -48,6 +48,8 @@ PIXMAN_ARM_BIND_FAST_PATH_SRC_DST (armv6, add_8_8,
uint8_t, 1, uint8_t, 1)
PIXMAN_ARM_BIND_FAST_PATH_SRC_DST (armv6, over_8888_8888,
uint32_t, 1, uint32_t, 1)
+PIXMAN_ARM_BIND_FAST_PATH_SRC_DST (armv6, in_8888_8,
+ uint32_t, 1, uint8_t, 1)
PIXMAN_ARM_BIND_FAST_PATH_SRC_DST (armv6, in_reverse_8888_8888,
uint32_t, 1, uint32_t, 1)
@@ -260,6 +262,8 @@ static const pixman_fast_path_t arm_simd_fast_paths[] =
PIXMAN_STD_FAST_PATH (OVER, solid, a8, a8b8g8r8, armv6_composite_over_n_8_8888),
PIXMAN_STD_FAST_PATH (OVER, solid, a8, x8b8g8r8, armv6_composite_over_n_8_8888),
+ PIXMAN_STD_FAST_PATH (IN, a8r8g8b8, null, a8, armv6_composite_in_8888_8),
+ PIXMAN_STD_FAST_PATH (IN, a8b8g8r8, null, a8, armv6_composite_in_8888_8),
PIXMAN_STD_FAST_PATH (IN_REVERSE, a8r8g8b8, null, a8r8g8b8, armv6_composite_in_reverse_8888_8888),
PIXMAN_STD_FAST_PATH (IN_REVERSE, a8r8g8b8, null, x8r8g8b8, armv6_composite_in_reverse_8888_8888),
PIXMAN_STD_FAST_PATH (IN_REVERSE, a8b8g8r8, null, a8b8g8r8, armv6_composite_in_reverse_8888_8888),
--
1.7.5.4
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