Re: [SH] PR 49880 - Fix some more -mdiv option issues

[Oleg Endo <oleg dot endo at t-online dot de>]

On Wed, 2013-03-13 at 12:05 +0900, Kaz Kojima wrote:
> Oleg Endo <oleg.endo@t-online.de> wrote:
> > The attached patch should make the -mdiv= option work as it is described
> > in the documentation (which I updated recently as part of PR 56529).
> > 
> > Tested with 'make all' and
> > 
> > make -k check-gcc RUNTESTFLAGS="sh.exp=pr49880* --target_board=sh-sim
> > \{-m2,-m2a,-m2a-nofpu,-m2a-single,-m2a-single-only,-m3,-m3e,-m4,-m4-single,
> > -m4-single-only,-m4a,-m4a-single,-m4a-single-only}"
> > 
> > OK for 4.8 and 4.7?
>  
> OK.

I've committed the attached patch including the sh-linux build fixes to
the 4.7 branch as revision 197071.

Cheers,
Oleg

Index: libgcc/config/sh/lib1funcs.S
===================================================================
--- libgcc/config/sh/lib1funcs.S	(revision 196758)
+++ libgcc/config/sh/lib1funcs.S	(working copy)
@@ -973,7 +973,7 @@
 #ifdef L_sdivsi3_i4
 	.title "SH DIVIDE"
 !! 4 byte integer Divide code for the Renesas SH
-#ifdef __SH4__
+#if defined (__SH4__) || defined (__SH2A__)
 !! args in r4 and r5, result in fpul, clobber dr0, dr2
 
 	.global	GLOBAL(sdivsi3_i4)
@@ -988,7 +988,7 @@
 	ftrc dr0,fpul
 
 	ENDFUNC(GLOBAL(sdivsi3_i4))
-#elif defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__) || (defined (__SH5__) && ! defined __SH4_NOFPU__)
+#elif defined (__SH2A_SINGLE__) || defined (__SH2A_SINGLE_ONLY__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__) || (defined (__SH5__) && ! defined __SH4_NOFPU__)
 !! args in r4 and r5, result in fpul, clobber r2, dr0, dr2
 
 #if ! __SH5__ || __SH5__ == 32
@@ -1013,13 +1013,12 @@
 
 	ENDFUNC(GLOBAL(sdivsi3_i4))
 #endif /* ! __SH5__ || __SH5__ == 32 */
-#endif /* ! __SH4__ */
+#endif /* ! __SH4__ || __SH2A__  */
 #endif
 
 #ifdef L_sdivsi3
 /* __SH4_SINGLE_ONLY__ keeps this part for link compatibility with
    sh2e/sh3e code.  */
-#if (! defined(__SH4__) && ! defined (__SH4_SINGLE__)) || defined (__linux__)
 !!
 !! Steve Chamberlain
 !! sac@cygnus.com
@@ -1336,13 +1335,12 @@
 
 	ENDFUNC(GLOBAL(sdivsi3))
 #endif /* ! __SHMEDIA__ */
-#endif /* ! __SH4__ */
 #endif
 #ifdef L_udivsi3_i4
 
 	.title "SH DIVIDE"
 !! 4 byte integer Divide code for the Renesas SH
-#ifdef __SH4__
+#if defined (__SH4__) || defined (__SH2A__)
 !! args in r4 and r5, result in fpul, clobber r0, r1, r4, r5, dr0, dr2, dr4,
 !! and t bit
 
@@ -1384,7 +1382,7 @@
 	.double 2147483648
 
 	ENDFUNC(GLOBAL(udivsi3_i4))
-#elif defined (__SH5__) && ! defined (__SH4_NOFPU__)
+#elif defined (__SH5__) && ! defined (__SH4_NOFPU__) && ! defined (__SH2A_NOFPU__)
 #if ! __SH5__ || __SH5__ == 32
 !! args in r4 and r5, result in fpul, clobber r20, r21, dr0, fr33
 	.mode	SHmedia
@@ -1405,7 +1403,7 @@
 
 	ENDFUNC(GLOBAL(udivsi3_i4))
 #endif /* ! __SH5__ || __SH5__ == 32 */
-#elif defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
+#elif defined (__SH2A_SINGLE__) || defined (__SH2A_SINGLE_ONLY__) || defined(__SH4_SINGLE__) || defined(__SH4_SINGLE_ONLY__)
 !! args in r4 and r5, result in fpul, clobber r0, r1, r4, r5, dr0, dr2, dr4
 
 	.global	GLOBAL(udivsi3_i4)
@@ -1460,7 +1458,6 @@
 #ifdef L_udivsi3
 /* __SH4_SINGLE_ONLY__ keeps this part for link compatibility with
    sh2e/sh3e code.  */
-#if (! defined(__SH4__) && ! defined (__SH4_SINGLE__)) || defined (__linux__)
 
 !! args in r4 and r5, result in r0, clobbers r4, pr, and t bit
 	.global	GLOBAL(udivsi3)
@@ -1655,7 +1652,6 @@
 
 	ENDFUNC(GLOBAL(udivsi3))
 #endif /* ! __SHMEDIA__ */
-#endif /* __SH4__ */
 #endif /* L_udivsi3 */
 
 #ifdef L_udivdi3
Index: gcc/testsuite/gcc.target/sh/pr49880-1.c
===================================================================
--- gcc/testsuite/gcc.target/sh/pr49880-1.c	(revision 0)
+++ gcc/testsuite/gcc.target/sh/pr49880-1.c	(revision 0)
@@ -0,0 +1,22 @@
+/* Check that the option -mdiv=call-div1 works.  */
+/* { dg-do link { target "sh*-*-*" } } */
+/* { dg-options "-mdiv=call-div1" }  */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*"} { "" } }  */
+
+int
+test00 (int a, int b)
+{
+  return a / b;
+}
+
+unsigned int
+test01 (unsigned int a, unsigned b)
+{
+  return a / b;
+}
+
+int
+main (int argc, char** argv)
+{
+  return test00 (argc, 123) + test01 (argc, 123);
+}
Index: gcc/testsuite/gcc.target/sh/pr49880-2.c
===================================================================
--- gcc/testsuite/gcc.target/sh/pr49880-2.c	(revision 0)
+++ gcc/testsuite/gcc.target/sh/pr49880-2.c	(revision 0)
@@ -0,0 +1,22 @@
+/* Check that the option -mdiv=call-fp works.  */
+/* { dg-do link { target "sh*-*-*" } } */
+/* { dg-options "-mdiv=call-fp" }  */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*"} { "" } }  */
+
+int
+test00 (int a, int b)
+{
+  return a / b;
+}
+
+unsigned int
+test01 (unsigned int a, unsigned b)
+{
+  return a / b;
+}
+
+int
+main (int argc, char** argv)
+{
+  return test00 (argc, 123) + test01 (argc, 123);
+}
Index: gcc/testsuite/gcc.target/sh/pr49880-3.c
===================================================================
--- gcc/testsuite/gcc.target/sh/pr49880-3.c	(revision 0)
+++ gcc/testsuite/gcc.target/sh/pr49880-3.c	(revision 0)
@@ -0,0 +1,22 @@
+/* Check that the option -mdiv=call-table works.  */
+/* { dg-do link { target "sh*-*-*" } } */
+/* { dg-options "-mdiv=call-table" }  */
+/* { dg-skip-if "" { "sh*-*-*" } { "-m5*"} { "" } }  */
+
+int
+test00 (int a, int b)
+{
+  return a / b;
+}
+
+unsigned int
+test01 (unsigned int a, unsigned b)
+{
+  return a / b;
+}
+
+int
+main (int argc, char** argv)
+{
+  return test00 (argc, 123) + test01 (argc, 123);
+}
Index: gcc/testsuite/gcc.target/sh/pr49880-4.c
===================================================================
--- gcc/testsuite/gcc.target/sh/pr49880-4.c	(revision 0)
+++ gcc/testsuite/gcc.target/sh/pr49880-4.c	(revision 0)
@@ -0,0 +1,19 @@
+/* Check that the option -mdiv=call-fp does not produce calls to the
+   library function that uses FPU to implement integer division if FPU insns
+   are not supported or are disabled.  */
+/* { dg-do compile { target "sh*-*-*" } }  */
+/* { dg-options "-mdiv=call-fp" }  */
+/* { dg-skip-if "" { "sh*-*-*" } { "*"} { "-m1" "-m2" "-m3" "-m4al" "*nofpu" "-m4-340*" "-m4-400*" "-m4-500*" } }  */
+/* { dg-final { scan-assembler-not "sdivsi3_i4\n|udivsi3_i4\n" } }  */
+
+int
+test00 (int a, int b)
+{
+  return a / b;
+}
+
+unsigned int
+test01 (unsigned int a, unsigned b)
+{
+  return a / b;
+}
Index: gcc/testsuite/gcc.target/sh/pr49880-5.c
===================================================================
--- gcc/testsuite/gcc.target/sh/pr49880-5.c	(revision 0)
+++ gcc/testsuite/gcc.target/sh/pr49880-5.c	(revision 0)
@@ -0,0 +1,19 @@
+/* Check that the option -mdiv=call-fp results in the corresponding library
+   function calls on targets that have a double precision FPU.  */
+/* { dg-do compile { target "sh*-*-*" } }  */
+/* { dg-options "-mdiv=call-fp" }  */
+/* { dg-skip-if "" { "sh*-*-*" } { "*"} { "-m2a" "-m4" "-m4a" "*single-only" } }  */
+/* { dg-final { scan-assembler "sdivsi3_i4\n" } }  */
+/* { dg-final { scan-assembler "udivsi3_i4\n" } }  */
+
+int
+test00 (int a, int b)
+{
+  return a / b;
+}
+
+unsigned int
+test01 (unsigned int a, unsigned b)
+{
+  return a / b;
+}
Index: gcc/config/sh/linux.h
===================================================================
--- gcc/config/sh/linux.h	(revision 196758)
+++ gcc/config/sh/linux.h	(working copy)
@@ -40,7 +40,7 @@
 
 #undef TARGET_DEFAULT
 #define TARGET_DEFAULT \
-  (TARGET_CPU_DEFAULT | MASK_USERMODE | TARGET_ENDIAN_DEFAULT \
+  (TARGET_CPU_DEFAULT | TARGET_ENDIAN_DEFAULT \
    | TARGET_OPT_DEFAULT | MASK_SOFT_ATOMIC)
 
 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
@@ -135,3 +135,13 @@
 /* Install the __sync libcalls.  */
 #undef TARGET_INIT_LIBFUNCS
 #define TARGET_INIT_LIBFUNCS  sh_init_sync_libfuncs
+
+#undef SUBTARGET_OVERRIDE_OPTIONS
+#define SUBTARGET_OVERRIDE_OPTIONS					\
+  do									\
+    {									\
+      /* Set -musermode if it hasn't been specified.  */		\
+      if (global_options_set.x_TARGET_USERMODE == 0)			\
+	TARGET_USERMODE = true;						\
+    }									\
+  while (0)
Index: gcc/config/sh/sh.c
===================================================================
--- gcc/config/sh/sh.c	(revision 196758)
+++ gcc/config/sh/sh.c	(working copy)
@@ -682,8 +682,7 @@
       if (! strcmp (sh_div_str, "call-div1"))
 	sh_div_strategy = SH_DIV_CALL_DIV1;
       else if (! strcmp (sh_div_str, "call-fp")
-	       && (TARGET_FPU_DOUBLE
-		   || (TARGET_HARD_SH4 && TARGET_SH2E)
+	       && (TARGET_FPU_DOUBLE || TARGET_FPU_SINGLE_ONLY
 		   || (TARGET_SHCOMPACT && TARGET_FPU_ANY)))
 	sh_div_strategy = SH_DIV_CALL_FP;
       else if (! strcmp (sh_div_str, "call-table")
Index: gcc/config/sh/sh.h
===================================================================
--- gcc/config/sh/sh.h	(revision 196758)
+++ gcc/config/sh/sh.h	(working copy)
@@ -208,14 +208,16 @@
 				  | MASK_SH2 | MASK_SH1)
 #define SELECT_SH2A_NOFPU        (MASK_HARD_SH2A | MASK_SH2 | MASK_SH1)
 #define SELECT_SH2A_SINGLE_ONLY  (MASK_SH_E | MASK_HARD_SH2A | MASK_SH2 \
-				  | MASK_SH1 | MASK_FPU_SINGLE)
+				  | MASK_SH1 | MASK_FPU_SINGLE \
+				  | MASK_FPU_SINGLE_ONLY)
 #define SELECT_SH2A_SINGLE       (MASK_SH_E | MASK_HARD_SH2A \
 				  | MASK_FPU_SINGLE | MASK_HARD_SH2A_DOUBLE \
 				  | MASK_SH2 | MASK_SH1)
 #define SELECT_SH3               (MASK_SH3 | SELECT_SH2)
 #define SELECT_SH3E              (MASK_SH_E | MASK_FPU_SINGLE | SELECT_SH3)
 #define SELECT_SH4_NOFPU         (MASK_HARD_SH4 | SELECT_SH3)
-#define SELECT_SH4_SINGLE_ONLY   (MASK_HARD_SH4 | SELECT_SH3E)
+#define SELECT_SH4_SINGLE_ONLY   (MASK_HARD_SH4 | SELECT_SH3E \
+				  | MASK_FPU_SINGLE_ONLY)
 #define SELECT_SH4               (MASK_SH4 | MASK_SH_E | MASK_HARD_SH4 \
 				  | SELECT_SH3)
 #define SELECT_SH4_SINGLE        (MASK_FPU_SINGLE | SELECT_SH4)
@@ -282,7 +284,8 @@
 /* Reset all target-selection flags.  */
 #define MASK_ARCH (MASK_SH1 | MASK_SH2 | MASK_SH3 | MASK_SH_E | MASK_SH4 \
 		   | MASK_HARD_SH2A | MASK_HARD_SH2A_DOUBLE | MASK_SH4A \
-		   | MASK_HARD_SH4 | MASK_FPU_SINGLE | MASK_SH5)
+		   | MASK_HARD_SH4 | MASK_FPU_SINGLE | MASK_SH5 \
+		   | MASK_FPU_SINGLE_ONLY)
 
 /* This defaults us to big-endian.  */
 #ifndef TARGET_ENDIAN_DEFAULT
Index: gcc/config/sh/netbsd-elf.h
===================================================================
--- gcc/config/sh/netbsd-elf.h	(revision 196758)
+++ gcc/config/sh/netbsd-elf.h	(working copy)
@@ -60,7 +60,7 @@
 
 #undef TARGET_DEFAULT
 #define TARGET_DEFAULT \
-  (TARGET_CPU_DEFAULT | MASK_USERMODE | TARGET_ENDIAN_DEFAULT)
+  (TARGET_CPU_DEFAULT | TARGET_ENDIAN_DEFAULT)
 
 /* Define because we use the label and we do not need them.  */
 #define NO_PROFILE_COUNTERS 1
@@ -96,3 +96,13 @@
 #define SH_DIV_STRATEGY_DEFAULT SH_DIV_CALL2
 #undef SH_DIV_STR_FOR_SIZE
 #define SH_DIV_STR_FOR_SIZE "call2"
+
+#undef SUBTARGET_OVERRIDE_OPTIONS
+#define SUBTARGET_OVERRIDE_OPTIONS					\
+  do									\
+    {									\
+      /* Set -musermode if it hasn't been specified.  */		\
+      if (global_options_set.x_TARGET_USERMODE == 0)			\
+	TARGET_USERMODE = true;						\
+    }									\
+  while (0)
Index: gcc/config/sh/sh.md
===================================================================
--- gcc/config/sh/sh.md	(revision 196758)
+++ gcc/config/sh/sh.md	(working copy)
@@ -1753,7 +1753,7 @@
    (clobber (reg:SI PR_REG))
    (clobber (reg:SI R4_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "TARGET_SH1 && (! TARGET_SH4 || TARGET_DIVIDE_CALL_DIV1)"
+  "TARGET_SH1 && TARGET_DIVIDE_CALL_DIV1"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "needs_delay_slot" "yes")])
@@ -1817,7 +1817,7 @@
    (clobber (reg:SI R5_REG))
    (use (reg:PSI FPSCR_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "TARGET_SH4 && ! TARGET_FPU_SINGLE"
+  "TARGET_FPU_DOUBLE && ! TARGET_FPU_SINGLE"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "fp_mode" "double")
@@ -1836,7 +1836,8 @@
    (clobber (reg:SI R4_REG))
    (clobber (reg:SI R5_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "(TARGET_HARD_SH4 || TARGET_SHCOMPACT) && TARGET_FPU_SINGLE"
+  "(TARGET_FPU_SINGLE_ONLY || TARGET_FPU_DOUBLE || TARGET_SHCOMPACT)
+   && TARGET_FPU_SINGLE"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "needs_delay_slot" "yes")])
@@ -1959,7 +1960,7 @@
    (clobber (reg:SI R2_REG))
    (clobber (reg:SI R3_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "TARGET_SH1 && (! TARGET_SH4 || TARGET_DIVIDE_CALL_DIV1)"
+  "TARGET_SH1 && TARGET_DIVIDE_CALL_DIV1"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "needs_delay_slot" "yes")])
@@ -2090,7 +2091,7 @@
    (clobber (reg:DF DR2_REG))
    (use (reg:PSI FPSCR_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "TARGET_SH4 && ! TARGET_FPU_SINGLE"
+  "TARGET_FPU_DOUBLE && ! TARGET_FPU_SINGLE"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "fp_mode" "double")
@@ -2104,7 +2105,8 @@
    (clobber (reg:DF DR2_REG))
    (clobber (reg:SI R2_REG))
    (use (match_operand:SI 1 "arith_reg_operand" "r"))]
-  "(TARGET_HARD_SH4 || TARGET_SHCOMPACT) && TARGET_FPU_SINGLE"
+  "(TARGET_FPU_SINGLE_ONLY || TARGET_FPU_DOUBLE || TARGET_SHCOMPACT)
+   && TARGET_FPU_SINGLE"
   "jsr	@%1%#"
   [(set_attr "type" "sfunc")
    (set_attr "needs_delay_slot" "yes")])
Index: gcc/config/sh/sh.opt
===================================================================
--- gcc/config/sh/sh.opt	(revision 196758)
+++ gcc/config/sh/sh.opt	(working copy)
@@ -25,6 +25,10 @@
 ;; Set if the default precision of th FPU is single.
 Mask(FPU_SINGLE)
 
+;; Set if the a double-precision FPU is present but is restricted to
+;; single precision usage only.
+Mask(FPU_SINGLE_ONLY)
+
 ;; Set if we should generate code using type 2A insns.
 Mask(HARD_SH2A)
 
@@ -332,7 +336,7 @@
 Cost to assume for a multiply insn
 
 musermode
-Target Report RejectNegative Mask(USERMODE)
+Target Report RejectNegative Var(TARGET_USERMODE)
 Don't generate privileged-mode only code; implies -mno-inline-ic_invalidate if the inline code would not work in user mode.
 
 ;; We might want to enable this by default for TARGET_HARD_SH4, because