scc

commit f66f017585239582175ccc52b9c110a90f60f07b
parent 8013c0388602bef2e589f867a9bff8fa196247c7
Author: Roberto E. Vargas Caballero <Roberto E. Vargas Caballero>
Date:   Fri, 22 Apr 2016 21:04:30 +0200

[cc2-qbe] Add conversions from float to float

These conversions were lost in the previous commit, and they
were dealt like float to int conversions.

Diffstat:
M
cc2/arch/qbe/arch.h
 | 
5
++++-
M
cc2/arch/qbe/cgen.c
 | 
9
++++++++-
M
cc2/arch/qbe/code.c
 | 
3
+++

3 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/cc2/arch/qbe/arch.h b/cc2/arch/qbe/arch.h
@@ -124,5 +124,8 @@ enum asmop {
 	ASSWTOD,
 	ASSWTOS,
 	ASSLTOD,
-	ASSLTOS
+	ASSLTOS,
+
+	ASEXTS,
+	ASTRUNCD
 };
diff --git a/cc2/arch/qbe/cgen.c b/cc2/arch/qbe/cgen.c
@@ -168,6 +168,10 @@ cast(Node *nd, Node *ns)
 		default:
 			abort();
 		}
+		/*
+		 * unsigned version of operations are always +1 the
+		 * signed version
+		 */
 		op += (td->flags & SIGNF) == 0;
 	} else if (disint) {
 		/* conversion from float to int */
@@ -182,7 +186,7 @@ cast(Node *nd, Node *ns)
 			abort();
 		}
 		/* TODO: Add signess */
-	} else {
+	} else if (sisint) {
 		/* conversion from int to float */
 		switch (ts->size) {
 		case 1:
@@ -201,6 +205,9 @@ cast(Node *nd, Node *ns)
 			abort();
 		}
 		/* TODO: Add signess */
+	} else {
+		/* conversion from float to float */
+		op = (td->size == 4) ? ASEXTS : ASTRUNCD;
 	}
 	code(op, tmpnode(nd), ns, NULL);
 	return nd;
diff --git a/cc2/arch/qbe/code.c b/cc2/arch/qbe/code.c
@@ -118,6 +118,9 @@ static struct opdata {
 	[ASSWTOS] = {.fun = unary, .txt = "swtof", .letter = 's'},
 	[ASSLTOD] = {.fun = unary, .txt = "sltof", .letter = 'd'},
 	[ASSLTOS] = {.fun = unary, .txt = "sltof", .letter = 's'},
+
+	[ASEXTS] = {.fun = unary, .txt = "exts", .letter = 'd'},
+	[ASSLTOS]= {.fun = unary, .txt = "truncd", .letter = 's'},
 };
 
 /*