From: Michael Beck <beck@ipd.info.uni-karlsruhe.de>
Date: Mon, 23 Jul 2007 22:03:47 +0000 (+0000)
Subject: sc_div() returns non-zero if divide without remainder
X-Git-Url: http://nsz.repo.hu/git/?a=commitdiff_plain;h=cd1f3f0c19a95d30b112f81cf0653904290f8c49;p=libfirm

sc_div() returns non-zero if divide without remainder

[r15301]
---

diff --git a/ir/tv/strcalc.c b/ir/tv/strcalc.c
index ab8e896c6..e6326a631 100644
--- a/ir/tv/strcalc.c
+++ b/ir/tv/strcalc.c
@@ -1579,9 +1579,9 @@ void sc_mul(const void *value1, const void *value2, void *buffer) {
 	}
 }
 
-void sc_div(const void *value1, const void *value2, void *buffer) {
+int sc_div(const void *value1, const void *value2, void *buffer) {
 	/* temp buffer holding unused result of divmod */
-	char *unused_res = alloca(calc_buffer_size);
+	char *mod_res = alloca(calc_buffer_size);
 
 	CLEAR_BUFFER(calc_buffer);
 	carry_flag = 0;
@@ -1589,13 +1589,14 @@ void sc_div(const void *value1, const void *value2, void *buffer) {
 	DEBUGPRINTF_COMPUTATION(("%s / ", sc_print_hex(value1)));
 	DEBUGPRINTF_COMPUTATION(("%s -> ", sc_print_hex(value2)));
 
-	_divmod(value1, value2, calc_buffer, unused_res);
+	_divmod(value1, value2, calc_buffer, mod_res);
 
 	DEBUGPRINTF_COMPUTATION(("%s\n", sc_print_hex(calc_buffer)));
 
 	if ((buffer != NULL) && (buffer != calc_buffer)) {
 		memcpy(buffer, calc_buffer, calc_buffer_size);
 	}
+	return sc_is_zero(mod_res);
 }
 
 void sc_mod(const void *value1, const void *value2, void *buffer) {
diff --git a/ir/tv/strcalc.h b/ir/tv/strcalc.h
index 01fee7efc..cd0c002d2 100644
--- a/ir/tv/strcalc.h
+++ b/ir/tv/strcalc.h
@@ -87,23 +87,77 @@ enum base_t {
   SC_BIN    /**< binary output */
 };
 
-/*
- * Interface
+/**
+ * buffer = value1 + value2
  */
 void sc_add(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = value1 - value2
+ */
 void sc_sub(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = -value
+ */
 void sc_neg(const void *value, void *buffer);
+
+/**
+ * buffer = value1 & value2
+ */
 void sc_and(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = value1 | value2
+ */
 void sc_or(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = value1 ^ value2
+ */
 void sc_xor(const void *value1, const void *value2, void *buffer);
-void sc_not(const void *value1, void *buffer);
+
+/**
+ * buffer = ~value
+ */
+void sc_not(const void *value, void *buffer);
+
+/**
+ * buffer = value1 * value2
+ */
 void sc_mul(const void *value1, const void *value2, void *buffer);
-void sc_div(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = value1 / value2
+ *
+ * @return non-zero if the remainder is null.
+ */
+int sc_div(const void *value1, const void *value2, void *buffer);
+
+/**
+ * buffer = value1 % value2
+ */
 void sc_mod(const void *value1, const void *value2, void *buffer);
-void sc_shl(const void *val1, const void *val2, int radius, int sign, void *buffer);
-void sc_shr(const void *val1, const void *val2, int radius, int sign, void *buffer);
-void sc_shrs(const void *val1, const void *val2, int radius, int sign, void *buffer);
-void sc_rot(const void *val1, const void *val2, int radius, int sign, void *buffer);
+
+/**
+ * buffer = value1 << value2
+ */
+void sc_shl(const void *value1, const void *value2, int radius, int sign, void *buffer);
+
+/**
+ * buffer = value1 >>u value2
+ */
+void sc_shr(const void *value1, const void *value2, int radius, int sign, void *buffer);
+
+/**
+ * buffer = value1 >>s value2
+ */
+void sc_shrs(const void *value1, const void *value2, int radius, int sign, void *buffer);
+
+/**
+ * buffer = value1 <<>> value2
+ */
+void sc_rot(const void *value1, const void *value2, int radius, int sign, void *buffer);
 
 /*
  * function declarations
@@ -127,6 +181,9 @@ long sc_val_to_long(const void *val);
 void sc_min_from_bits(unsigned int num_bits, unsigned int sign, void *buffer);
 void sc_max_from_bits(unsigned int num_bits, unsigned int sign, void *buffer);
 
+/**
+ * Compares val1 and val2
+ */
 int  sc_comp(const void *val1, const void *val2);
 
 int sc_get_highest_set_bit(const void *value);