313 lines
12 KiB
Rust
313 lines
12 KiB
Rust
use inkwell::{values::{BasicValueEnum, CallSiteValue}, AddressSpace, AtomicOrdering};
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use itertools::Either;
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use nac3core::codegen::CodeGenContext;
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/// Functions for manipulating the timeline.
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pub trait TimeFns {
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/// Emits LLVM IR for `now_mu`.
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fn emit_now_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>) -> BasicValueEnum<'ctx>;
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/// Emits LLVM IR for `at_mu`.
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fn emit_at_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>, t: BasicValueEnum<'ctx>);
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/// Emits LLVM IR for `delay_mu`.
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fn emit_delay_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>, dt: BasicValueEnum<'ctx>);
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}
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pub struct NowPinningTimeFns64 {}
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// For FPGA design reasons, on VexRiscv with 64-bit data bus, the "now" CSR is split into two 32-bit
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// values that are each padded to 64-bits.
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impl TimeFns for NowPinningTimeFns64 {
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fn emit_now_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>) -> BasicValueEnum<'ctx> {
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let i64_type = ctx.ctx.i64_type();
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let i32_type = ctx.ctx.i32_type();
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_hiptr = ctx.builder
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.build_bitcast(now, i32_type.ptr_type(AddressSpace::default()), "now.hi.addr")
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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let now_loptr = unsafe {
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ctx.builder.build_gep(now_hiptr, &[i32_type.const_int(2, false)], "now.lo.addr")
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}.unwrap();
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let now_hi = ctx.builder.build_load(now_hiptr, "now.hi")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let now_lo = ctx.builder.build_load(now_loptr, "now.lo")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let zext_hi = ctx.builder.build_int_z_extend(now_hi, i64_type, "").unwrap();
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let shifted_hi = ctx.builder
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.build_left_shift(zext_hi, i64_type.const_int(32, false), "")
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.unwrap();
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let zext_lo = ctx.builder.build_int_z_extend(now_lo, i64_type, "").unwrap();
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ctx.builder.build_or(shifted_hi, zext_lo, "now_mu").map(Into::into).unwrap()
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}
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fn emit_at_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>, t: BasicValueEnum<'ctx>) {
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let i32_type = ctx.ctx.i32_type();
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let i64_type = ctx.ctx.i64_type();
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let i64_32 = i64_type.const_int(32, false);
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let time = t.into_int_value();
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let time_hi = ctx.builder
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.build_int_truncate(
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ctx.builder.build_right_shift(time, i64_32, false, "time.hi").unwrap(),
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i32_type,
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"",
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)
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.unwrap();
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let time_lo = ctx.builder.build_int_truncate(time, i32_type, "time.lo").unwrap();
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_hiptr = ctx.builder
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.build_bitcast(now, i32_type.ptr_type(AddressSpace::default()), "now.hi.addr")
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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let now_loptr = unsafe {
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ctx.builder.build_gep(now_hiptr, &[i32_type.const_int(2, false)], "now.lo.addr")
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}.unwrap();
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ctx.builder
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.build_store(now_hiptr, time_hi)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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ctx.builder
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.build_store(now_loptr, time_lo)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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}
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fn emit_delay_mu<'ctx>(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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dt: BasicValueEnum<'ctx>,
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) {
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let i64_type = ctx.ctx.i64_type();
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let i32_type = ctx.ctx.i32_type();
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_hiptr = ctx.builder
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.build_bitcast(now, i32_type.ptr_type(AddressSpace::default()), "now.hi.addr")
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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let now_loptr = unsafe {
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ctx.builder.build_gep(now_hiptr, &[i32_type.const_int(2, false)], "now.lo.addr")
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}.unwrap();
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let now_hi = ctx.builder.build_load(now_hiptr, "now.hi")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let now_lo = ctx.builder.build_load(now_loptr, "now.lo")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let dt = dt.into_int_value();
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let zext_hi = ctx.builder.build_int_z_extend(now_hi, i64_type, "").unwrap();
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let shifted_hi = ctx.builder
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.build_left_shift(zext_hi, i64_type.const_int(32, false), "")
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.unwrap();
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let zext_lo = ctx.builder.build_int_z_extend(now_lo, i64_type, "").unwrap();
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let now_val = ctx.builder.build_or(shifted_hi, zext_lo, "now").unwrap();
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let time = ctx.builder.build_int_add(now_val, dt, "time").unwrap();
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let time_hi = ctx.builder
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.build_int_truncate(
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ctx.builder.build_right_shift(
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time,
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i64_type.const_int(32, false),
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false,
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"",
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).unwrap(),
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i32_type,
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"time.hi",
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)
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.unwrap();
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let time_lo = ctx.builder.build_int_truncate(time, i32_type, "time.lo").unwrap();
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ctx.builder
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.build_store(now_hiptr, time_hi)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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ctx.builder
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.build_store(now_loptr, time_lo)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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}
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}
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pub static NOW_PINNING_TIME_FNS_64: NowPinningTimeFns64 = NowPinningTimeFns64 {};
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pub struct NowPinningTimeFns {}
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impl TimeFns for NowPinningTimeFns {
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fn emit_now_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>) -> BasicValueEnum<'ctx> {
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let i64_type = ctx.ctx.i64_type();
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_raw = ctx.builder.build_load(now.as_pointer_value(), "now")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let i64_32 = i64_type.const_int(32, false);
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let now_lo = ctx.builder.build_left_shift(now_raw, i64_32, "now.lo").unwrap();
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let now_hi = ctx.builder.build_right_shift(now_raw, i64_32, false, "now.hi").unwrap();
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ctx.builder.build_or(now_lo, now_hi, "now_mu")
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.map(Into::into)
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.unwrap()
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}
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fn emit_at_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>, t: BasicValueEnum<'ctx>) {
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let i32_type = ctx.ctx.i32_type();
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let i64_type = ctx.ctx.i64_type();
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let i64_32 = i64_type.const_int(32, false);
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let time = t.into_int_value();
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let time_hi = ctx.builder
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.build_int_truncate(
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ctx.builder.build_right_shift(time, i64_32, false, "").unwrap(),
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i32_type,
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"time.hi",
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)
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.unwrap();
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let time_lo = ctx.builder.build_int_truncate(time, i32_type, "now_trunc").unwrap();
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_hiptr = ctx.builder
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.build_bitcast(now, i32_type.ptr_type(AddressSpace::default()), "now.hi.addr")
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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let now_loptr = unsafe {
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ctx.builder.build_gep(now_hiptr, &[i32_type.const_int(1, false)], "now.lo.addr")
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}.unwrap();
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ctx.builder
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.build_store(now_hiptr, time_hi)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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ctx.builder
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.build_store(now_loptr, time_lo)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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}
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fn emit_delay_mu<'ctx>(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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dt: BasicValueEnum<'ctx>,
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) {
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let i32_type = ctx.ctx.i32_type();
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let i64_type = ctx.ctx.i64_type();
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let i64_32 = i64_type.const_int(32, false);
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let now = ctx
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.module
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.get_global("now")
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.unwrap_or_else(|| ctx.module.add_global(i64_type, None, "now"));
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let now_raw = ctx.builder
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.build_load(now.as_pointer_value(), "")
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.map(BasicValueEnum::into_int_value)
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.unwrap();
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let dt = dt.into_int_value();
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let now_lo = ctx.builder.build_left_shift(now_raw, i64_32, "now.lo").unwrap();
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let now_hi = ctx.builder.build_right_shift(now_raw, i64_32, false, "now.hi").unwrap();
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let now_val = ctx.builder.build_or(now_lo, now_hi, "now_val").unwrap();
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let time = ctx.builder.build_int_add(now_val, dt, "time").unwrap();
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let time_hi = ctx.builder
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.build_int_truncate(
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ctx.builder.build_right_shift(time, i64_32, false, "time.hi").unwrap(),
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i32_type,
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"now_trunc",
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)
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.unwrap();
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let time_lo = ctx.builder.build_int_truncate(time, i32_type, "time.lo").unwrap();
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let now_hiptr = ctx.builder
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.build_bitcast(now, i32_type.ptr_type(AddressSpace::default()), "now.hi.addr")
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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let now_loptr = unsafe {
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ctx.builder.build_gep(now_hiptr, &[i32_type.const_int(1, false)], "now.lo.addr")
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}.unwrap();
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ctx.builder
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.build_store(now_hiptr, time_hi)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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ctx.builder
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.build_store(now_loptr, time_lo)
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.unwrap()
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.set_atomic_ordering(AtomicOrdering::SequentiallyConsistent)
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.unwrap();
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}
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}
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pub static NOW_PINNING_TIME_FNS: NowPinningTimeFns = NowPinningTimeFns {};
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pub struct ExternTimeFns {}
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impl TimeFns for ExternTimeFns {
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fn emit_now_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>) -> BasicValueEnum<'ctx> {
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let now_mu = ctx.module.get_function("now_mu").unwrap_or_else(|| {
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ctx.module.add_function("now_mu", ctx.ctx.i64_type().fn_type(&[], false), None)
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});
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ctx.builder.build_call(now_mu, &[], "now_mu")
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.map(CallSiteValue::try_as_basic_value)
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.map(Either::unwrap_left)
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.unwrap()
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}
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fn emit_at_mu<'ctx>(&self, ctx: &mut CodeGenContext<'ctx, '_>, t: BasicValueEnum<'ctx>) {
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let at_mu = ctx.module.get_function("at_mu").unwrap_or_else(|| {
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ctx.module.add_function(
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"at_mu",
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ctx.ctx.void_type().fn_type(&[ctx.ctx.i64_type().into()], false),
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None,
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)
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});
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ctx.builder.build_call(at_mu, &[t.into()], "at_mu").unwrap();
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}
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fn emit_delay_mu<'ctx>(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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dt: BasicValueEnum<'ctx>,
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) {
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let delay_mu = ctx.module.get_function("delay_mu").unwrap_or_else(|| {
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ctx.module.add_function(
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"delay_mu",
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ctx.ctx.void_type().fn_type(&[ctx.ctx.i64_type().into()], false),
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None,
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)
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});
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ctx.builder.build_call(delay_mu, &[dt.into()], "delay_mu").unwrap();
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}
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}
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pub static EXTERN_TIME_FNS: ExternTimeFns = ExternTimeFns {};
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