mirror of https://github.com/rust-lang/rust
108 lines
2.5 KiB
Rust
108 lines
2.5 KiB
Rust
//@ run-pass
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// Checks if the correct registers are being used to pass arguments
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// when the sysv64 ABI is specified.
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//@ ignore-android
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//@ ignore-arm
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//@ ignore-aarch64
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//@ needs-asm-support
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#[cfg(target_arch = "x86_64")]
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pub extern "sysv64" fn all_the_registers(
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rdi: i64,
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rsi: i64,
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rdx: i64,
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rcx: i64,
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r8: i64,
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r9: i64,
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xmm0: f32,
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xmm1: f32,
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xmm2: f32,
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xmm3: f32,
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xmm4: f32,
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xmm5: f32,
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xmm6: f32,
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xmm7: f32,
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) -> i64 {
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assert_eq!(rdi, 1);
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assert_eq!(rsi, 2);
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assert_eq!(rdx, 3);
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assert_eq!(rcx, 4);
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assert_eq!(r8, 5);
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assert_eq!(r9, 6);
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assert_eq!(xmm0, 1.0f32);
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assert_eq!(xmm1, 2.0f32);
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assert_eq!(xmm2, 4.0f32);
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assert_eq!(xmm3, 8.0f32);
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assert_eq!(xmm4, 16.0f32);
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assert_eq!(xmm5, 32.0f32);
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assert_eq!(xmm6, 64.0f32);
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assert_eq!(xmm7, 128.0f32);
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42
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}
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// this struct contains 8 i64's, while only 6 can be passed in registers.
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#[cfg(target_arch = "x86_64")]
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#[derive(PartialEq, Eq, Debug)]
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pub struct LargeStruct(i64, i64, i64, i64, i64, i64, i64, i64);
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#[cfg(target_arch = "x86_64")]
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#[inline(never)]
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#[allow(improper_ctypes_definitions)]
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pub extern "sysv64" fn large_struct_by_val(mut foo: LargeStruct) -> LargeStruct {
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foo.0 *= 1;
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foo.1 *= 2;
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foo.2 *= 3;
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foo.3 *= 4;
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foo.4 *= 5;
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foo.5 *= 6;
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foo.6 *= 7;
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foo.7 *= 8;
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foo
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}
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#[cfg(target_arch = "x86_64")]
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pub fn main() {
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use std::arch::asm;
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let result: i64;
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unsafe {
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asm!("mov rdi, 1",
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"mov rsi, 2",
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"mov rdx, 3",
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"mov rcx, 4",
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"mov r8, 5",
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"mov r9, 6",
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"mov eax, 0x3F800000",
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"movd xmm0, eax",
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"mov eax, 0x40000000",
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"movd xmm1, eax",
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"mov eax, 0x40800000",
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"movd xmm2, eax",
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"mov eax, 0x41000000",
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"movd xmm3, eax",
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"mov eax, 0x41800000",
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"movd xmm4, eax",
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"mov eax, 0x42000000",
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"movd xmm5, eax",
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"mov eax, 0x42800000",
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"movd xmm6, eax",
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"mov eax, 0x43000000",
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"movd xmm7, eax",
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"call {0}",
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sym all_the_registers,
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out("rax") result,
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clobber_abi("sysv64"),
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);
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}
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assert_eq!(result, 42);
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assert_eq!(
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large_struct_by_val(LargeStruct(1, 2, 3, 4, 5, 6, 7, 8)),
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LargeStruct(1, 4, 9, 16, 25, 36, 49, 64)
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);
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}
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#[cfg(not(target_arch = "x86_64"))]
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pub fn main() {}
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