increase from 3 to 11 floating registers

R=rsc OCL=32947 CL=32947

increase from 3 to 11 floating registers
R=rsc OCL=32947 CL=32947
60238e25 · Ken Thompson · 34f76b5d · 60238e25 · 60238e25
Commit 60238e25 authored Aug 09, 2009 by Ken Thompson
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src/cmd/6g/reg.c src/cmd/6g/reg.c +4 -4

src/cmd/6l/6.out.h src/cmd/6l/6.out.h +1 -1

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--- a/src/cmd/6g/reg.c
+++ b/src/cmd/6g/reg.c
@@ -1439,9 +1439,9 @@ BtoR(int32 b)

 /*
 *	bit	reg
- *	16	X5
- *	17	X6
- *	18	X7
+ *	16	X5 (FREGMIN)
+ *	...
+ *	26	X15 (FREGEXT)
 */
 int32
 FtoB(int f)
@@ -1455,7 +1455,7 @@ int
 BtoF(int32 b)
 {

-	b &= 0x70000L;
+	b &= 0xFF0000L;
 	if(b == 0)
 		return 0;
 	return bitno(b) - 16 + FREGMIN;

--- a/src/cmd/6l/6.out.h
+++ b/src/cmd/6l/6.out.h
@@ -839,7 +839,7 @@ enum
 	REGTMP		= D_DI,
 	REGEXT		= D_R15,	/* compiler allocates external registers R15 down */
 	FREGMIN		= D_X0+5,	/* first register variable */
-	FREGEXT		= D_X0+7	/* first external register */
+	FREGEXT		= D_X0+15	/* first external register */
 };

 /*