PowerPC floating point little-endian [12 of 15]

http://sourceware.org/ml/libc-alpha/2013-08/msg00087.html

Fixes for little-endian in 32-bit assembly.

	* sysdeps/powerpc/sysdep.h (LOWORD, HIWORD, HISHORT): Define.
	* sysdeps/powerpc/powerpc32/fpu/s_copysign.S: Load little-endian
	words of double from correct stack offsets.
	* sysdeps/powerpc/powerpc32/fpu/s_copysignl.S: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_lrint.S: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_lround.S: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S: Likewise.
	* sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S: Likewise.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S: Likewise.
	* sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S: Likewise.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S: Likewise.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S: Likewise.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S: Likewise.
	* sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S: Likewise.
	* sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S: Likewise.
	* sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S: Likewise.
	* sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S: Likewise.
	* sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S: Use HISHORT.
	* sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S: Likewise.

20 files changed, 71 insertions, 38 deletions

diff --git a/ChangeLog b/ChangeLog
index cdee05cce3..10c2e80b9b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,28 @@
 2013-10-04  Alan Modra  <amodra@gmail.com>
 
+	* sysdeps/powerpc/sysdep.h (LOWORD, HIWORD, HISHORT): Define.
+	* sysdeps/powerpc/powerpc32/fpu/s_copysign.S: Load little-endian
+	words of double from correct stack offsets.
+	* sysdeps/powerpc/powerpc32/fpu/s_copysignl.S: Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_lrint.S: Likewise.
+	* sysdeps/powerpc/powerpc32/fpu/s_lround.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S: Likewise.
+	* sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S: Likewise.
+	* sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S: Use HISHORT.
+	* sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S: Likewise.
+
+2013-10-04  Alan Modra  <amodra@gmail.com>
+
 	* sysdeps/powerpc/fpu_control.h (_FPU_GETCW): Rewrite using
 	64-bit int/double union.
 	(_FPU_SETCW): Likewise.
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_copysign.S b/sysdeps/powerpc/powerpc32/fpu/s_copysign.S
index 840891f1c3..1da24f492e 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_copysign.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_copysign.S
@@ -29,7 +29,7 @@ ENTRY(__copysign)
 	stwu	r1,-16(r1)
 	cfi_adjust_cfa_offset (16)
 	stfd	fp2,8(r1)
-	lwz	r3,8(r1)
+	lwz	r3,8+HIWORD(r1)
 	cmpwi   r3,0
 	addi    r1,r1,16
 	cfi_adjust_cfa_offset (-16)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_copysignl.S b/sysdeps/powerpc/powerpc32/fpu/s_copysignl.S
index 4ec8389b5d..2ad6de273d 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_copysignl.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_copysignl.S
@@ -30,7 +30,7 @@ ENTRY(__copysignl)
 	fmr	fp0,fp1
 	fabs	fp1,fp1
 	fcmpu	cr7,fp0,fp1
-	lwz	r3,8(r1)
+	lwz	r3,8+HIWORD(r1)
 	cmpwi	cr6,r3,0
 	addi	r1,r1,16
 	cfi_adjust_cfa_offset (-16)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_lrint.S b/sysdeps/powerpc/powerpc32/fpu/s_lrint.S
index 27881f8cc7..249fda501f 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_lrint.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_lrint.S
@@ -24,10 +24,10 @@ ENTRY (__lrint)
 	stwu	r1,-16(r1)
 	fctiw	fp13,fp1
 	stfd	fp13,8(r1)
-	nop	/* Insure the following load is in a different dispatch group */
+	nop	/* Ensure the following load is in a different dispatch group */
 	nop	/* to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r3,12(r1)
+	lwz	r3,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__lrint)
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_lround.S b/sysdeps/powerpc/powerpc32/fpu/s_lround.S
index 92dc3787d6..6309f864b7 100644
--- a/sysdeps/powerpc/powerpc32/fpu/s_lround.S
+++ b/sysdeps/powerpc/powerpc32/fpu/s_lround.S
@@ -67,7 +67,7 @@ ENTRY (__lround)
 	nop	/* Ensure the following load is in a different dispatch  */
 	nop	/* group to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r3,12(r1)	/* Load return as integer.  */
+	lwz	r3,8+LOWORD(r1)	/* Load return as integer.  */
 .Lout:
 	addi	r1,r1,16
 	blr
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S b/sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S
index 55b2850fd1..e7a88feb4b 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/s_llrint.S
@@ -29,8 +29,8 @@ ENTRY (__llrint)
 	nop	/* Insure the following load is in a different dispatch group */
 	nop	/* to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r3,8(r1)
-	lwz	r4,12(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llrint)
diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S b/sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S
index cc80fcb02a..da24ad38d3 100644
--- a/sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S
+++ b/sysdeps/powerpc/powerpc32/power4/fpu/s_llrintf.S
@@ -28,8 +28,8 @@ ENTRY (__llrintf)
 	nop	/* Insure the following load is in a different dispatch group */
 	nop	/* to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r3,8(r1)
-	lwz	r4,12(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llrintf)
diff --git a/sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S b/sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S
index ecd37c3cd2..49c8a08661 100644
--- a/sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S
+++ b/sysdeps/powerpc/powerpc32/power5+/fpu/s_llround.S
@@ -39,8 +39,8 @@ ENTRY (__llround)
 	nop	/* Ensure the following load is in a different dispatch  */
 	nop	/* group to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r4,12(r1)
-	lwz	r3,8(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llround)
diff --git a/sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S b/sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S
index d4da625bb7..780dd9ca41 100644
--- a/sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S
+++ b/sysdeps/powerpc/powerpc32/power5+/fpu/s_lround.S
@@ -38,7 +38,7 @@ ENTRY (__lround)
 	nop	/* Ensure the following load is in a different dispatch  */
 	nop	/* group to avoid pipe stall on POWER4&5.  */
 	nop
-	lwz	r3,12(r1)
+	lwz	r3,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__lround)
diff --git a/sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S b/sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S
index f2417fdf41..5f7ba43a2a 100644
--- a/sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S
+++ b/sysdeps/powerpc/powerpc32/power5/fpu/s_isnan.S
@@ -27,8 +27,8 @@ EALIGN (__isnan, 4, 0)
 	ori	r1,r1,0
 	stfd	fp1,24(r1)	/* copy FPR to GPR */
 	ori	r1,r1,0
-	lwz	r4,24(r1)
-	lwz	r5,28(r1)
+	lwz	r4,24+HIWORD(r1)
+	lwz	r5,24+LOWORD(r1)
 	lis	r0,0x7ff0	/* const long r0 0x7ff00000 00000000 */
 	clrlwi	r4,r4,1		/* x = fabs(x) */
 	cmpw	cr7,r4,r0	/* if (fabs(x) =< inf) */
diff --git a/sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S b/sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S
index 2c095db1d4..3ea18589c8 100644
--- a/sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S
+++ b/sysdeps/powerpc/powerpc32/power6/fpu/s_isnan.S
@@ -27,8 +27,8 @@ EALIGN (__isnan, 4, 0)
 	ori	r1,r1,0
 	stfd	fp1,24(r1)	/* copy FPR to GPR */
 	ori	r1,r1,0
-	lwz	r4,24(r1)
-	lwz	r5,28(r1)
+	lwz	r4,24+HIWORD(r1)
+	lwz	r5,24+LOWORD(r1)
 	lis	r0,0x7ff0	/* const long r0 0x7ff00000 00000000 */
 	clrlwi	r4,r4,1		/* x = fabs(x) */
 	cmpw	cr7,r4,r0	/* if (fabs(x) =< inf) */
diff --git a/sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S b/sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S
index 3344b312e2..c0660cf6ec 100644
--- a/sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S
+++ b/sysdeps/powerpc/powerpc32/power6/fpu/s_llrint.S
@@ -29,8 +29,8 @@ ENTRY (__llrint)
 /* Insure the following load is in a different dispatch group by
    inserting "group ending nop".  */
 	ori	r1,r1,0
-	lwz	r3,8(r1)
-	lwz	r4,12(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llrint)
diff --git a/sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S b/sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S
index 7f64f8d12b..ce298905c1 100644
--- a/sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S
+++ b/sysdeps/powerpc/powerpc32/power6/fpu/s_llrintf.S
@@ -28,8 +28,8 @@ ENTRY (__llrintf)
 /* Insure the following load is in a different dispatch group by
    inserting "group ending nop".  */
 	ori	r1,r1,0
-	lwz	r3,8(r1)
-	lwz	r4,12(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llrintf)
diff --git a/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S b/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S
index 0ff04cb718..abb0840d18 100644
--- a/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S
+++ b/sysdeps/powerpc/powerpc32/power6/fpu/s_llround.S
@@ -39,8 +39,8 @@ ENTRY (__llround)
 /* Insure the following load is in a different dispatch group by
    inserting "group ending nop".  */
 	ori	r1,r1,0
-	lwz	r4,12(r1)
-	lwz	r3,8(r1)
+	lwz	r3,8+HIWORD(r1)
+	lwz	r4,8+LOWORD(r1)
 	addi	r1,r1,16
 	blr
 	END (__llround)
diff --git a/sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S b/sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S
index b2ab5bfe7b..095c15547a 100644
--- a/sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S
+++ b/sysdeps/powerpc/powerpc32/power7/fpu/s_finite.S
@@ -54,9 +54,8 @@ ENTRY (__finite)
 	stfd    fp1,8(r1)     /* Transfer FP to GPR's.  */
 
 	ori	2,2,0	      /* Force a new dispatch group.  */
-	lhz     r0,8(r1)      /* Fetch the upper portion of the high word of
-			      the FP value (where the exponent and sign bits
-			      are).  */
+	lhz	r0,8+HISHORT(r1) /* Fetch the upper 16 bits of the FP value
+				    (biased exponent and sign bit).  */
 	clrlwi	r0,r0,17      /* r0 = abs(r0).  */
 	addi	r1,r1,16      /* Reset the stack pointer.  */
 	cmpwi	cr7,r0,0x7ff0 /* r4 == 0x7ff0?.  */
diff --git a/sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S b/sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S
index 3f8af60a55..0101c8fa17 100644
--- a/sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S
+++ b/sysdeps/powerpc/powerpc32/power7/fpu/s_isinf.S
@@ -48,14 +48,13 @@ ENTRY (__isinf)
 	li	r3,0
 	bflr    29	      /* If not INF, return.  */
 
-	/* Either we have -INF/+INF or a denormal.  */
+	/* Either we have +INF or -INF.  */
 
 	stwu    r1,-16(r1)    /* Allocate stack space.  */
 	stfd    fp1,8(r1)     /* Transfer FP to GPR's.  */
 	ori	2,2,0	      /* Force a new dispatch group.  */
-	lhz	r4,8(r1)      /* Fetch the upper portion of the high word of
-			      the FP value (where the exponent and sign bits
-			      are).  */
+	lhz	r4,8+HISHORT(r1) /* Fetch the upper 16 bits of the FP value
+				    (biased exponent and sign bit).  */
 	addi	r1,r1,16      /* Reset the stack pointer.  */
 	cmpwi	cr7,r4,0x7ff0 /* r4 == 0x7ff0?  */
 	li	r3,1
diff --git a/sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S b/sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S
index 99ff126961..0ad1dcf1f7 100644
--- a/sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S
+++ b/sysdeps/powerpc/powerpc32/power7/fpu/s_isnan.S
@@ -53,8 +53,8 @@ ENTRY (__isnan)
 	stwu	r1,-16(r1)    /* Allocate stack space.  */
 	stfd	fp1,8(r1)     /* Transfer FP to GPR's.  */
 	ori	2,2,0	      /* Force a new dispatch group.  */
-	lwz     r4,8(r1)      /* Load the upper half of the FP value.  */
-	lwz     r5,12(r1)     /* Load the lower half of the FP value.  */
+	lwz     r4,8+HIWORD(r1) /* Load the upper half of the FP value.  */
+	lwz     r5,8+LOWORD(r1) /* Load the lower half of the FP value.  */
 	addi	r1,r1,16      /* Reset the stack pointer.  */
 	lis     r0,0x7ff0     /* Load the upper portion for an INF/NaN.  */
 	clrlwi  r4,r4,1	      /* r4 = abs(r4).  */
diff --git a/sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S b/sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S
index d0071c7658..ebec0e0bad 100644
--- a/sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S
+++ b/sysdeps/powerpc/powerpc64/power7/fpu/s_finite.S
@@ -39,10 +39,8 @@ EALIGN (__finite, 4, 0)
 
 	stfd    fp1,-16(r1)   /* Transfer FP to GPR's.  */
 	ori	2,2,0	      /* Force a new dispatch group.  */
-
-	lhz     r4,-16(r1)    /* Fetch the upper portion of the high word of
-			      the FP value (where the exponent and sign bits
-			      are).  */
+	lhz     r4,-16+HISHORT(r1)  /* Fetch the upper 16 bits of the FP value
+				    (biased exponent and sign bit).  */
 	clrlwi  r4,r4,17      /* r4 = abs(r4).  */
 	cmpwi   cr7,r4,0x7ff0 /* r4 == 0x7ff0?  */
 	bltlr   cr7	      /* LT means finite, other non-finite.  */
diff --git a/sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S b/sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S
index 1aea12383f..8d088db5af 100644
--- a/sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S
+++ b/sysdeps/powerpc/powerpc64/power7/fpu/s_isinf.S
@@ -38,9 +38,8 @@ EALIGN (__isinf, 4, 0)
 
 	stfd    fp1,-16(r1)   /* Transfer FP to GPR's.  */
 	ori	2,2,0	      /* Force a new dispatch group.  */
-	lhz	r4,-16(r1)    /* Fetch the upper portion of the high word of
-			      the FP value (where the exponent and sign bits
-			      are).  */
+	lhz	r4,-16+HISHORT(r1)  /* Fetch the upper 16 bits of the FP value
+				    (biased exponent and sign bit).  */
 	cmpwi	cr7,r4,0x7ff0 /* r4 == 0x7ff0?  */
 	li	r3,1
 	beqlr   cr7	      /* EQ means INF, otherwise -INF.  */
diff --git a/sysdeps/powerpc/sysdep.h b/sysdeps/powerpc/sysdep.h
index 1b5334ad34..bc2cb6681a 100644
--- a/sysdeps/powerpc/sysdep.h
+++ b/sysdeps/powerpc/sysdep.h
@@ -144,6 +144,21 @@
 
 #define VRSAVE	256
 
+/* The 32-bit words of a 64-bit dword are at these offsets in memory.  */
+#if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN
+# define LOWORD 0
+# define HIWORD 4
+#else
+# define LOWORD 4
+# define HIWORD 0
+#endif
+
+/* The high 16-bit word of a 64-bit dword is at this offset in memory.  */
+#if defined __LITTLE_ENDIAN__ || defined _LITTLE_ENDIAN
+# define HISHORT 6
+#else
+# define HISHORT 0
+#endif
 
 /* This seems to always be the case on PPC.  */
 #define ALIGNARG(log2) log2