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skia2/tests/sksl/runtime/SampleWithConstantMatrix.skvm

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add fast_mul(F32,F32) This is just like mul(F32,F32) but optimizes 0*x == 0. Use it in SkSLVMGenerator; sksl already applies this optimization. PS2 has a sneaky version using % as a fast_mul() operator, and PS3 has a sneakier version using ** instead. We could of course write this all out using fast_mul() the long way, but I found that quickly became difficult to read. Change-Id: Iae35ce54411abc00e7729e178eb6a10f151a5304 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368838 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
2021-02-10 22:13:35 +00:00
9 registers, 24 instructions:
rename Arg to Ptr This makes almost all existing code read more clearly. Change-Id: I314331d9aa2ecb4664557efc7972e1a820afc250 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/352085 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
2021-01-08 19:45:42 +00:00
0 r0 = uniform32 ptr0 0
1 r1 = uniform32 ptr0 C
add fast_mul(F32,F32) This is just like mul(F32,F32) but optimizes 0*x == 0. Use it in SkSLVMGenerator; sksl already applies this optimization. PS2 has a sneaky version using % as a fast_mul() operator, and PS3 has a sneakier version using ** instead. We could of course write this all out using fast_mul() the long way, but I found that quickly became difficult to read. Change-Id: Iae35ce54411abc00e7729e178eb6a10f151a5304 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368838 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
2021-02-10 22:13:35 +00:00
2 r2 = splat 40000000 (2)
3 r0 = trunc r0
4 r1 = mul_i32 r0 r1
5 r0 = splat 1 (1.4012985e-45)
6 r3 = splat 2 (2.8025969e-45)
7 r4 = splat 3 (4.2038954e-45)
Add .rte -> .skvm unit test framework Includes a handful of test cases to exercise the system Change-Id: I98e73a8bca063f475d2ddb51778e395697392ddb Reviewed-on: https://skia-review.googlesource.com/c/skia/+/346637 Reviewed-by: John Stiles <johnstiles@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
2020-12-22 16:28:59 +00:00
loop:
add fast_mul(F32,F32) This is just like mul(F32,F32) but optimizes 0*x == 0. Use it in SkSLVMGenerator; sksl already applies this optimization. PS2 has a sneaky version using % as a fast_mul() operator, and PS3 has a sneakier version using ** instead. We could of course write this all out using fast_mul() the long way, but I found that quickly became difficult to read. Change-Id: Iae35ce54411abc00e7729e178eb6a10f151a5304 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368838 Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Mike Klein <mtklein@google.com>
2021-02-10 22:13:35 +00:00
8 r5 = index
9 r5 = mul_f32 r2 r5
10 r5 = trunc r5
11 r5 = add_i32 r5 r1
12 r5 = shl_i32 r5 2
13 r6 = gather32 ptr0 4 r5
14 r7 = add_i32 r5 r0
15 r7 = gather32 ptr0 4 r7
16 r8 = add_i32 r5 r3
17 r8 = gather32 ptr0 4 r8
18 r5 = add_i32 r5 r4
19 r5 = gather32 ptr0 4 r5
20 store32 ptr1 r6
21 store32 ptr2 r7
22 store32 ptr3 r8
23 store32 ptr4 r5
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