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This commit is contained in:
Nick Lewycky
2019-07-18 13:40:24 -07:00
parent ea93b68165
commit 3e009c5971
3 changed files with 67 additions and 22 deletions
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47
lib/llvm-backend/src/code.rs
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@ -114,14 +114,22 @@ fn trunc_sat(
let int_min_value = splat_vector(
builder,
intrinsics,
ivec_ty.get_element_type().into_int_type().const_int(int_min_value, is_signed).as_basic_value_enum(),
ivec_ty
.get_element_type()
.into_int_type()
.const_int(int_min_value, is_signed)
.as_basic_value_enum(),
ivec_ty,
"",
);
let int_max_value = splat_vector(
builder,
intrinsics,
ivec_ty.get_element_type().into_int_type().const_int(int_max_value, is_signed).as_basic_value_enum(),
ivec_ty
.get_element_type()
.into_int_type()
.const_int(int_max_value, is_signed)
.as_basic_value_enum(),
ivec_ty,
"",
);
@ -183,10 +191,15 @@ fn trunc_sat(
"",
);
let nan_cmp = builder.build_float_compare(FloatPredicate::UNO, value, zero, "nan");
let above_upper_bound_cmp = builder.build_float_compare(FloatPredicate::OGT, value, upper_bound, "above_upper_bound");
let below_lower_bound_cmp = builder.build_float_compare(FloatPredicate::OLT, value, lower_bound, "below_lower_bound");
let not_representable = builder
.build_or(builder.build_or(nan_cmp, above_upper_bound_cmp, ""), below_lower_bound_cmp, "not_representable_as_int");
let above_upper_bound_cmp =
builder.build_float_compare(FloatPredicate::OGT, value, upper_bound, "above_upper_bound");
let below_lower_bound_cmp =
builder.build_float_compare(FloatPredicate::OLT, value, lower_bound, "below_lower_bound");
let not_representable = builder.build_or(
builder.build_or(nan_cmp, above_upper_bound_cmp, ""),
below_lower_bound_cmp,
"not_representable_as_int",
);
let value = builder
.build_select(not_representable, zero, value, "safe_to_convert")
.into_vector_value();
@ -4120,10 +4133,24 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
let idx = builder
.build_extract_element(v2, intrinsics.i32_ty.const_int(i, false), "idx")
.into_int_value();
let idx_out_of_range = builder.build_int_compare(IntPredicate::UGE, idx, lanes, "idx_out_of_range");
let idx_clamped = builder.build_select(idx_out_of_range, intrinsics.i32_zero, idx, "idx_clamped").into_int_value();
let elem = builder.build_extract_element(v1, idx_clamped, "elem").into_int_value();
let elem_or_zero = builder.build_select(idx_out_of_range, intrinsics.i32_zero, elem, "elem_or_zero");
let idx_out_of_range = builder.build_int_compare(
IntPredicate::UGE,
idx,
lanes,
"idx_out_of_range",
);
let idx_clamped = builder
.build_select(idx_out_of_range, intrinsics.i32_zero, idx, "idx_clamped")
.into_int_value();
let elem = builder
.build_extract_element(v1, idx_clamped, "elem")
.into_int_value();
let elem_or_zero = builder.build_select(
idx_out_of_range,
intrinsics.i32_zero,
elem,
"elem_or_zero",
);
res = builder.build_insert_element(
res,
elem_or_zero,