motiejus/zig
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support casting between floats

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This commit is contained in:
Andrew Kelley
2016-01-31 21:22:05 -07:00
parent e74a7264ad
commit a4e19f94f1
4 changed files with 47 additions and 14 deletions
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30
src/codegen.cpp
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@@ -349,20 +349,36 @@ static LLVMValueRef gen_enum_value_expr(CodeGen *g, AstNode *node, TypeTableEntr
static LLVMValueRef gen_widen_or_shorten(CodeGen *g, AstNode *source_node, TypeTableEntry *actual_type,
TypeTableEntry *wanted_type, LLVMValueRef expr_val)
{
assert(actual_type->id == wanted_type->id);
if (actual_type->size_in_bits == wanted_type->size_in_bits) {
return expr_val;
} else if (actual_type->size_in_bits < wanted_type->size_in_bits) {
if (actual_type->data.integral.is_signed) {
if (actual_type->id == TypeTableEntryIdFloat) {
add_debug_source_node(g, source_node);
return LLVMBuildSExt(g->builder, expr_val, wanted_type->type_ref, "");
return LLVMBuildFPExt(g->builder, expr_val, wanted_type->type_ref, "");
} else if (actual_type->id == TypeTableEntryIdInt) {
if (actual_type->data.integral.is_signed) {
add_debug_source_node(g, source_node);
return LLVMBuildSExt(g->builder, expr_val, wanted_type->type_ref, "");
} else {
add_debug_source_node(g, source_node);
return LLVMBuildZExt(g->builder, expr_val, wanted_type->type_ref, "");
}
} else {
zig_unreachable();
}
} else if (actual_type->size_in_bits > wanted_type->size_in_bits) {
if (actual_type->id == TypeTableEntryIdFloat) {
add_debug_source_node(g, source_node);
return LLVMBuildZExt(g->builder, expr_val, wanted_type->type_ref, "");
return LLVMBuildFPTrunc(g->builder, expr_val, wanted_type->type_ref, "");
} else if (actual_type->id == TypeTableEntryIdInt) {
add_debug_source_node(g, source_node);
return LLVMBuildTrunc(g->builder, expr_val, wanted_type->type_ref, "");
} else {
zig_unreachable();
}
} else {
assert(actual_type->size_in_bits > wanted_type->size_in_bits);
add_debug_source_node(g, source_node);
return LLVMBuildTrunc(g->builder, expr_val, wanted_type->type_ref, "");
zig_unreachable();
}
}
@@ -455,7 +471,7 @@ static LLVMValueRef gen_cast_expr(CodeGen *g, AstNode *node) {
case CastOpPointerReinterpret:
add_debug_source_node(g, node);
return LLVMBuildBitCast(g->builder, expr_val, wanted_type->type_ref, "");
case CastOpIntWidenOrShorten:
case CastOpWidenOrShorten:
return gen_widen_or_shorten(g, node, actual_type, wanted_type, expr_val);
case CastOpToUnknownSizeArray:
{