/*
- * Copyright (C) 2012, 2013
+ * Copyright (C) 2012, 2013, 2014
* Dale Weiler
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
}
static ast_expression *intrin_shift_variant(intrin_t *intrin, const char *name, size_t instr) {
- ast_value *value = NULL;
- ast_call *callpow = ast_call_new (intrin_ctx(intrin), intrin_func_self(intrin, "pow", name));
- ast_value *a = ast_value_new(intrin_ctx(intrin), "a", TYPE_FLOAT);
- ast_value *b = ast_value_new(intrin_ctx(intrin), "b", TYPE_FLOAT);
- ast_block *body = ast_block_new(intrin_ctx(intrin));
- ast_function *func = intrin_value(intrin, &value, name, TYPE_FLOAT);
+ /*
+ * float [shift] (float a, float b) {
+ * return floor(a [instr] pow(2, b));
+ */
+ ast_value *value = NULL;
+ ast_call *callpow = ast_call_new (intrin_ctx(intrin), intrin_func_self(intrin, "pow", name));
+ ast_call *callfloor = ast_call_new (intrin_ctx(intrin), intrin_func_self(intrin, "floor", name));
+ ast_value *a = ast_value_new(intrin_ctx(intrin), "a", TYPE_FLOAT);
+ ast_value *b = ast_value_new(intrin_ctx(intrin), "b", TYPE_FLOAT);
+ ast_block *body = ast_block_new(intrin_ctx(intrin));
+ ast_function *func = intrin_value(intrin, &value, name, TYPE_FLOAT);
vec_push(value->expression.params, a);
vec_push(value->expression.params, b);
+ /* <callpow> = pow(2, b) */
vec_push(callpow->params, (ast_expression*)intrin->fold->imm_float[3]);
vec_push(callpow->params, (ast_expression*)b);
+ /* <callfloor> = floor(a [instr] <callpow>) */
+ vec_push(
+ callfloor->params,
+ (ast_expression*)ast_binary_new(
+ intrin_ctx(intrin),
+ instr,
+ (ast_expression*)a,
+ (ast_expression*)callpow
+ )
+ );
+
+ /* return <callfloor> */
vec_push(body->exprs,
(ast_expression*)ast_return_new(
intrin_ctx(intrin),
- (ast_expression*)ast_binary_new(
- intrin_ctx(intrin),
- instr,
- (ast_expression*)a,
- (ast_expression*)callpow
- )
+ (ast_expression*)callfloor
)
);