109 lines
2.5 KiB
Zig
109 lines
2.5 KiB
Zig
// Ported from:
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//
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// https://github.com/llvm/llvm-project/commit/d674d96bc56c0f377879d01c9d8dfdaaa7859cdb/compiler-rt/lib/builtins/arm/aeabi_fcmp.S
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const compiler_rt_armhf_target = false; // TODO
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const ConditionalOperator = enum {
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Eq,
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Lt,
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Le,
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Ge,
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Gt,
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};
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pub nakedcc fn __aeabi_fcmpeq() noreturn {
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@setRuntimeSafety(false);
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@call(.{ .modifier = .always_inline }, aeabi_fcmp, .{.Eq});
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unreachable;
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}
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pub nakedcc fn __aeabi_fcmplt() noreturn {
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@setRuntimeSafety(false);
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@call(.{ .modifier = .always_inline }, aeabi_fcmp, .{.Lt});
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unreachable;
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}
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pub nakedcc fn __aeabi_fcmple() noreturn {
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@setRuntimeSafety(false);
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@call(.{ .modifier = .always_inline }, aeabi_fcmp, .{.Le});
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unreachable;
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}
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pub nakedcc fn __aeabi_fcmpge() noreturn {
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@setRuntimeSafety(false);
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@call(.{ .modifier = .always_inline }, aeabi_fcmp, .{.Ge});
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unreachable;
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}
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pub nakedcc fn __aeabi_fcmpgt() noreturn {
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@setRuntimeSafety(false);
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@call(.{ .modifier = .always_inline }, aeabi_fcmp, .{.Gt});
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unreachable;
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}
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inline fn convert_fcmp_args_to_sf2_args() void {
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asm volatile (
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\\ vmov s0, r0
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\\ vmov s1, r1
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);
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}
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fn aeabi_fcmp(comptime cond: ConditionalOperator) void {
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@setRuntimeSafety(false);
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asm volatile (
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\\ push { r4, lr }
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);
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if (compiler_rt_armhf_target) {
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convert_fcmp_args_to_sf2_args();
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}
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switch (cond) {
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.Eq => asm volatile (
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\\ bl __eqsf2
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\\ cmp r0, #0
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\\ beq 1f
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\\ movs r0, #0
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\\ pop { r4, pc }
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\\ 1:
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),
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.Lt => asm volatile (
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\\ bl __ltsf2
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\\ cmp r0, #0
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\\ blt 1f
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\\ movs r0, #0
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\\ pop { r4, pc }
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\\ 1:
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),
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.Le => asm volatile (
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\\ bl __lesf2
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\\ cmp r0, #0
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\\ ble 1f
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\\ movs r0, #0
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\\ pop { r4, pc }
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\\ 1:
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),
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.Ge => asm volatile (
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\\ bl __ltsf2
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\\ cmp r0, #0
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\\ bge 1f
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\\ movs r0, #0
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\\ pop { r4, pc }
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\\ 1:
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),
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.Gt => asm volatile (
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\\ bl __gtsf2
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\\ cmp r0, #0
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\\ bgt 1f
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\\ movs r0, #0
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\\ pop { r4, pc }
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\\ 1:
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),
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}
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asm volatile (
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\\ movs r0, #1
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\\ pop { r4, pc }
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);
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}
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