MIPS: math-emu: Add z argument macros

Introduce macros for handling the "z" argument to maddf & msubf, making
its handling consistent with that of the "x" & "y" arguments rather than
open-coding equivalents.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13156/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/math-emu/dp_maddf.c

@@ -36,16 +36,15 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
 
 	COMPXDP;
 	COMPYDP;
-
-	u64 zm; int ze; int zs __maybe_unused; int zc;
+	COMPZDP;
 
 	EXPLODEXDP;
 	EXPLODEYDP;
-	EXPLODEDP(z, zc, zs, ze, zm)
+	EXPLODEZDP;
 
 	FLUSHXDP;
 	FLUSHYDP;
-	FLUSHDP(z, zc, zs, ze, zm);
+	FLUSHZDP;
 
 	ieee754_clearcx();
 
@@ -54,7 +53,7 @@ static union ieee754dp _dp_maddf(union ieee754dp z, union ieee754dp x,
 		ieee754_setcx(IEEE754_INVALID_OPERATION);
 		return ieee754dp_nanxcpt(z);
 	case IEEE754_CLASS_DNORM:
-		DPDNORMx(zm, ze);
+		DPDNORMZ;
 	/* QNAN is handled separately below */
 	}
 

arch/mips/math-emu/ieee754dp.h

@@ -60,6 +60,7 @@ static inline int ieee754dp_finite(union ieee754dp x)
 	while ((m >> DP_FBITS) == 0) { m <<= 1; e--; }
 #define DPDNORMX	DPDNORMx(xm, xe)
 #define DPDNORMY	DPDNORMx(ym, ye)
+#define DPDNORMZ	DPDNORMx(zm, ze)
 
 static inline union ieee754dp builddp(int s, int bx, u64 m)
 {

arch/mips/math-emu/ieee754int.h

@@ -55,6 +55,9 @@ static inline int ieee754_class_nan(int xc)
 #define COMPYSP \
 	unsigned ym; int ye; int ys; int yc
 
+#define COMPZSP \
+	unsigned zm; int ze; int zs; int zc
+
 #define EXPLODESP(v, vc, vs, ve, vm)					\
 {									\
 	vs = SPSIGN(v);							\
@@ -81,6 +84,7 @@ static inline int ieee754_class_nan(int xc)
 }
 #define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
 #define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
+#define EXPLODEZSP EXPLODESP(z, zc, zs, ze, zm)
 
 
 #define COMPXDP \
@@ -89,6 +93,9 @@ static inline int ieee754_class_nan(int xc)
 #define COMPYDP \
 	u64 ym; int ye; int ys; int yc
 
+#define COMPZDP \
+	u64 zm; int ze; int zs; int zc
+
 #define EXPLODEDP(v, vc, vs, ve, vm)					\
 {									\
 	vm = DPMANT(v);							\
@@ -115,6 +122,7 @@ static inline int ieee754_class_nan(int xc)
 }
 #define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
 #define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
+#define EXPLODEZDP EXPLODEDP(z, zc, zs, ze, zm)
 
 #define FLUSHDP(v, vc, vs, ve, vm)					\
 	if (vc==IEEE754_CLASS_DNORM) {					\
@@ -140,7 +148,9 @@ static inline int ieee754_class_nan(int xc)
 
 #define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
 #define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
+#define FLUSHZDP FLUSHDP(z, zc, zs, ze, zm)
 #define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
 #define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
+#define FLUSHZSP FLUSHSP(z, zc, zs, ze, zm)
 
 #endif /* __IEEE754INT_H  */

arch/mips/math-emu/ieee754sp.h

@@ -65,6 +65,7 @@ static inline int ieee754sp_finite(union ieee754sp x)
 	while ((m >> SP_FBITS) == 0) { m <<= 1; e--; }
 #define SPDNORMX	SPDNORMx(xm, xe)
 #define SPDNORMY	SPDNORMx(ym, ye)
+#define SPDNORMZ	SPDNORMx(zm, ze)
 
 static inline union ieee754sp buildsp(int s, int bx, unsigned m)
 {

arch/mips/math-emu/sp_maddf.c

@@ -36,15 +36,15 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
 
 	COMPXSP;
 	COMPYSP;
-	u32 zm; int ze; int zs __maybe_unused; int zc;
+	COMPZSP;
 
 	EXPLODEXSP;
 	EXPLODEYSP;
-	EXPLODESP(z, zc, zs, ze, zm)
+	EXPLODEZSP;
 
 	FLUSHXSP;
 	FLUSHYSP;
-	FLUSHSP(z, zc, zs, ze, zm);
+	FLUSHZSP;
 
 	ieee754_clearcx();
 
@@ -53,7 +53,7 @@ static union ieee754sp _sp_maddf(union ieee754sp z, union ieee754sp x,
 		ieee754_setcx(IEEE754_INVALID_OPERATION);
 		return ieee754sp_nanxcpt(z);
 	case IEEE754_CLASS_DNORM:
-		SPDNORMx(zm, ze);
+		SPDNORMZ;
 	/* QNAN is handled separately below */
 	}