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[simd] Use portable swizzles

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gcc and clang have rather different swizzle builtins, but both do a nice
job of optimizing the intuitive initializer swizzle (I think gcc 8(?)
didn't do such a good job thus my use of __builtin_shuffle).
This commit is contained in:
Bill Currie 2022-03-31 02:25:33 +09:00
parent 7305406f46
commit 7a6ca0ebcb
6 changed files with 42 additions and 673 deletions
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6
libs/gamecode/swizzle.py
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@ -19,7 +19,7 @@ def print_ref(i, j, k, l):
print(f"\t\t&&{label(i, j, k, l)},")
def print_op(i, j, k, l):
print(f"\t{label(i, j, k, l)}: vec = swizzle (vec, (pr_ivec4_t) {{ {l}, {k}, {j}, {i} }}); goto negate;")
print(f"\t{label(i, j, k, l)}: vec = ({optype}) {{ vec[{l}], vec[{k}], vec[{j}], vec[{i}] }}; goto negate;")
def print_data(i, j, k, l):
print(f"\t{{ {l+1:2}, {k+1:2}, {j+1:2}, {i+1:2} }},")
@ -78,6 +78,10 @@ types = ["f", "d"]
tests = ["swizzle", "neg", "zero"]
if sys.argv[1] == "case":
if sys.argv[2] == "int":
optype = "pr_ivec4_t"
elif sys.argv[2] == "long":
optype = "pr_lvec4_t"
iter(print_op)
print("\tstatic void *swizzle_table[256] = {")
iter(print_ref)