[Patch libgcc] Enable HCmode multiply and divide (mulhc3/divhc3)

This patch arranges for half-precision complex multiply and divide
routines to be built if __LIBGCC_HAS_HF_MODE__.  This will be true
if the target supports the _Float16 type.

libgcc/

	PR target/63250
	*  Makefile.in (lib2funcs): Build _mulhc3 and _divhc3.
	* libgcc2.h (LIBGCC_HAS_HF_MODE): Conditionally define.
	(HFtype): Likewise.
	(HCtype): Likewise.
	(__divhc3): Likewise.
	(__mulhc3): Likewise.
	* libgcc2.c: Support _mulhc3 and _divhc3.

From-SVN: r240043

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index acbe274200d8befd3009722425837f5212955955..73e3a4f6d6f48029bb332e3589b1fc375adcffe1 100644 (file)
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,14 @@
+2016-09-09  James Greenhalgh  <james.greenhalgh@arm.com>
+
+       PR target/63250
+       *  Makefile.in (lib2funcs): Build _mulhc3 and _divhc3.
+       * libgcc2.h (LIBGCC_HAS_HF_MODE): Conditionally define.
+       (HFtype): Likewise.
+       (HCtype): Likewise.
+       (__divhc3): Likewise.
+       (__mulhc3): Likewise.
+       * libgcc2.c: Support _mulhc3 and _divhc3.
+
 2016-09-07  Joseph Myers  <joseph@codesourcery.com>
 
        PR libgcc/77519

diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index ba37c657baf3658e9d779886567e374b2f8ab275..53e3ea20b12aead9ccaad0ede7a6e14ac7673323 100644 (file)
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -414,8 +414,9 @@ lib2funcs = _muldi3 _negdi2 _lshrdi3 _ashldi3 _ashrdi3 _cmpdi2 _ucmpdi2        \
            _negvsi2 _negvdi2 _ctors _ffssi2 _ffsdi2 _clz _clzsi2 _clzdi2  \
            _ctzsi2 _ctzdi2 _popcount_tab _popcountsi2 _popcountdi2        \
            _paritysi2 _paritydi2 _powisf2 _powidf2 _powixf2 _powitf2      \
-           _mulsc3 _muldc3 _mulxc3 _multc3 _divsc3 _divdc3 _divxc3        \
-           _divtc3 _bswapsi2 _bswapdi2 _clrsbsi2 _clrsbdi2
+           _mulhc3 _mulsc3 _muldc3 _mulxc3 _multc3 _divhc3 _divsc3        \
+           _divdc3 _divxc3 _divtc3 _bswapsi2 _bswapdi2 _clrsbsi2          \
+           _clrsbdi2
 
 # The floating-point conversion routines that involve a single-word integer.
 # XX stands for the integer mode.

diff --git a/libgcc/libgcc2.c b/libgcc/libgcc2.c
index 4f0e19901dc513f0f560b2129aa927809c5f28d0..9fb150b2dd5fc415736a110ff5f979edd5ad1b6b 100644 (file)
--- a/libgcc/libgcc2.c
+++ b/libgcc/libgcc2.c
@@ -1852,7 +1852,8 @@ NAME (TYPE x, int m)
 
 #endif
 \f
-#if ((defined(L_mulsc3) || defined(L_divsc3)) && LIBGCC2_HAS_SF_MODE) \
+#if((defined(L_mulhc3) || defined(L_divhc3)) && LIBGCC2_HAS_HF_MODE) \
+    || ((defined(L_mulsc3) || defined(L_divsc3)) && LIBGCC2_HAS_SF_MODE) \
     || ((defined(L_muldc3) || defined(L_divdc3)) && LIBGCC2_HAS_DF_MODE) \
     || ((defined(L_mulxc3) || defined(L_divxc3)) && LIBGCC2_HAS_XF_MODE) \
     || ((defined(L_multc3) || defined(L_divtc3)) && LIBGCC2_HAS_TF_MODE)
@@ -1861,7 +1862,13 @@ NAME (TYPE x, int m)
 #undef double
 #undef long
 
-#if defined(L_mulsc3) || defined(L_divsc3)
+#if defined(L_mulhc3) || defined(L_divhc3)
+# define MTYPE HFtype
+# define CTYPE HCtype
+# define MODE  hc
+# define CEXT  __LIBGCC_HF_FUNC_EXT__
+# define NOTRUNC (!__LIBGCC_HF_EXCESS_PRECISION__)
+#elif defined(L_mulsc3) || defined(L_divsc3)
 # define MTYPE SFtype
 # define CTYPE SCtype
 # define MODE  sc
@@ -1922,7 +1929,7 @@ extern void *compile_type_assert[sizeof(INFINITY) == sizeof(MTYPE) ? 1 : -1];
 # define TRUNC(x)      __asm__ ("" : "=m"(x) : "m"(x))
 #endif
 
-#if defined(L_mulsc3) || defined(L_muldc3) \
+#if defined(L_mulhc3) || defined(L_mulsc3) || defined(L_muldc3) \
     || defined(L_mulxc3) || defined(L_multc3)
 
 CTYPE
@@ -1992,7 +1999,7 @@ CONCAT3(__mul,MODE,3) (MTYPE a, MTYPE b, MTYPE c, MTYPE d)
 }
 #endif /* complex multiply */
 
-#if defined(L_divsc3) || defined(L_divdc3) \
+#if defined(L_divhc3) || defined(L_divsc3) || defined(L_divdc3) \
     || defined(L_divxc3) || defined(L_divtc3)
 
 CTYPE

diff --git a/libgcc/libgcc2.h b/libgcc/libgcc2.h
index 72bb873ac33d858fd6d20a66843e0495fe373846..c46fb77a6ec2828d40f23ff823d05d3c36d9f796 100644 (file)
--- a/libgcc/libgcc2.h
+++ b/libgcc/libgcc2.h
@@ -34,6 +34,12 @@ extern void __clear_cache (char *, char *);
 extern void __eprintf (const char *, const char *, unsigned int, const char *)
   __attribute__ ((__noreturn__));
 
+#ifdef __LIBGCC_HAS_HF_MODE__
+#define LIBGCC2_HAS_HF_MODE 1
+#else
+#define LIBGCC2_HAS_HF_MODE 0
+#endif
+
 #ifdef __LIBGCC_HAS_SF_MODE__
 #define LIBGCC2_HAS_SF_MODE 1
 #else
@@ -133,6 +139,10 @@ typedef unsigned int UTItype       __attribute__ ((mode (TI)));
 #endif
 #endif
 
+#if LIBGCC2_HAS_HF_MODE
+typedef                float HFtype    __attribute__ ((mode (HF)));
+typedef _Complex float HCtype  __attribute__ ((mode (HC)));
+#endif
 #if LIBGCC2_HAS_SF_MODE
 typedef        float SFtype    __attribute__ ((mode (SF)));
 typedef _Complex float SCtype  __attribute__ ((mode (SC)));
@@ -424,6 +434,10 @@ extern SItype __negvsi2 (SItype);
 #endif /* COMPAT_SIMODE_TRAPPING_ARITHMETIC */
 
 #undef int
+#if LIBGCC2_HAS_HF_MODE
+extern HCtype __divhc3 (HFtype, HFtype, HFtype, HFtype);
+extern HCtype __mulhc3 (HFtype, HFtype, HFtype, HFtype);
+#endif
 #if LIBGCC2_HAS_SF_MODE
 extern DWtype __fixsfdi (SFtype);
 extern SFtype __floatdisf (DWtype);