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Fix byte swapping for endian specific types in -llvm-api

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This commit is contained in:
gingerBill
2021-03-27 12:48:29 +00:00
parent 01c2662de4
commit 0ccf103160
2 changed files with 24 additions and 4 deletions
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17
core/runtime/internal.odin
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@@ -9,24 +9,33 @@ bswap_32 :: proc "none" (x: u32) -> u32 {
}
bswap_64 :: proc "none" (x: u64) -> u64 {
return u64(bswap_32(u32(x))) | u64(bswap_32(u32(x>>32)));
z := x;
z = (z & 0x00000000ffffffff) << 32 | (z & 0xffffffff00000000) >> 32;
z = (z & 0x0000ffff0000ffff) << 16 | (z & 0xffff0000ffff0000) >> 16;
z = (z & 0x00ff00ff00ff00ff) << 8 | (z & 0xff00ff00ff00ff00) >> 8;
return z;
}
bswap_128 :: proc "none" (x: u128) -> u128 {
return u128(bswap_64(u64(x))) | u128(bswap_64(u64(x>>64)));
z := transmute([4]u32)x;
z[0] = bswap_32(z[3]);
z[1] = bswap_32(z[2]);
z[2] = bswap_32(z[1]);
z[3] = bswap_32(z[0]);
return transmute(u128)z;
}
bswap_f32 :: proc "none" (f: f32) -> f32 {
x := transmute(u32)f;
z := x>>24 | (x>>8)&0xff00 | (x<<8)&0xff0000 | x<<24;
z := bswap_32(x);
return transmute(f32)z;
}
bswap_f64 :: proc "none" (f: f64) -> f64 {
x := transmute(u64)f;
z := u64(bswap_32(u32(x))) | u64(bswap_32(u32(x>>32)));
z := bswap_64(x);
return transmute(f64)z;
}

11
src/llvm_backend.cpp
View File

@@ -6886,6 +6886,17 @@ lbValue lb_emit_conv(lbProcedure *p, lbValue value, Type *t) {
i64 sz = type_size_of(default_type(src));
i64 dz = type_size_of(default_type(dst));
if (sz == dz) {
if (dz > 1 && !types_have_same_internal_endian(src, dst)) {
return lb_emit_byte_swap(p, value, t);
}
lbValue res = {};
res.value = value.value;
res.type = t;
return res;
}
if (sz > 1 && is_type_different_to_arch_endianness(src)) {
Type *platform_src_type = integer_endian_type_to_platform_type(src);
value = lb_emit_byte_swap(p, value, platform_src_type);