Hi,
The attached patch removes the fsca instruction support for DFmode on
SH4A when -ffast-math is enabled.
Tested against rev 18 with
make -k check RUNTESTFLAGS=--target_board=sh-sim
\{-m2/-ml,-m2/-mb,-m2a-single/-mb,
-m4-single/-ml,-m4-single/-mb,
-m4a-single/-ml,-m4a-single/-mb}
and no new failures.
Cheers,
Oleg
ChangeLog:
PR target/52479
* config/sh/sh-protos.h (sh_fsca_df2int): Remove.
* config/sh/sh.c (sh_fsca_df2int_rtx, sh_fsca_df2int): Remove.
* config/sh/sh.md (sindf2, cosdf2): Remove.
testsuite/ChangeLog:
PR target/52479
* gcc.target/sh/sh4a-cos.c: Remove.
* gcc.target/sh/sh4a-sin.c: Remove.
Index: gcc/testsuite/gcc.target/sh/sh4a-cos.c
===
--- gcc/testsuite/gcc.target/sh/sh4a-cos.c (revision 185554)
+++ gcc/testsuite/gcc.target/sh/sh4a-cos.c (working copy)
@@ -1,11 +0,0 @@
-/* Verify that we generate single-precision sine and cosine approximate
- (fsca) in fast math mode on SH4A with FPU. */
-/* { dg-do compile { target sh*-*-* } } */
-/* { dg-options -O -ffast-math } */
-/* { dg-skip-if { sh*-*-* } { * } { -m4a -m4a-single -m4a-single-only } } */
-/* { dg-final { scan-assembler fsca } } */
-
-#include math.h
-
-double test(double f) { return cos(f); }
-
Index: gcc/testsuite/gcc.target/sh/sh4a-sin.c
===
--- gcc/testsuite/gcc.target/sh/sh4a-sin.c (revision 185554)
+++ gcc/testsuite/gcc.target/sh/sh4a-sin.c (working copy)
@@ -1,11 +0,0 @@
-/* Verify that we generate single-precision sine and cosine approximate
- (fsca) in fast math mode on SH4A with FPU. */
-/* { dg-do compile { target sh*-*-* } } */
-/* { dg-options -O -ffast-math } */
-/* { dg-skip-if { sh*-*-* } { * } { -m4a -m4a-single -m4a-single-only } } */
-/* { dg-final { scan-assembler fsca } } */
-
-#include math.h
-
-double test(double f) { return sin(f); }
-
Index: gcc/testsuite/gcc.target/sh/sh4a-sincos.c
===
--- gcc/testsuite/gcc.target/sh/sh4a-sincos.c (revision 185554)
+++ gcc/testsuite/gcc.target/sh/sh4a-sincos.c (working copy)
@@ -1,12 +0,0 @@
-/* Verify that we generate a single single-precision sine and cosine
- approximate (fsca) in fast math mode when a function computes both
- sine and cosine. */
-/* { dg-do compile { target sh*-*-* } } */
-/* { dg-options -O -ffast-math } */
-/* { dg-skip-if { sh*-*-* } { * } { -m4a -m4a-single -m4a-single-only } } */
-/* { dg-final { scan-assembler-times fsca 1 } } */
-
-#include math.h
-
-double test(double f) { return sin(f) + cos(f); }
-
Index: gcc/config/sh/sh-protos.h
===
--- gcc/config/sh/sh-protos.h (revision 185554)
+++ gcc/config/sh/sh-protos.h (working copy)
@@ -39,7 +39,6 @@
#ifdef RTX_CODE
extern rtx sh_fsca_sf2int (void);
-extern rtx sh_fsca_df2int (void);
extern rtx sh_fsca_int2sf (void);
/* Declare functions defined in sh.c and used in templates. */
Index: gcc/config/sh/sh.c
===
--- gcc/config/sh/sh.c (revision 185554)
+++ gcc/config/sh/sh.c (working copy)
@@ -11997,27 +11997,6 @@
return sh_fsca_sf2int_rtx;
}
-/* This function returns a constant rtx that represents pi / 2**15 in
- DFmode. it's used to scale DFmode angles, in radians, to a
- fixed-point signed 16.16-bit fraction of a full circle, i.e., 2*pi
- maps to 0x1). */
-
-static GTY(()) rtx sh_fsca_df2int_rtx;
-
-rtx
-sh_fsca_df2int (void)
-{
- if (! sh_fsca_df2int_rtx)
-{
- REAL_VALUE_TYPE rv;
-
- real_from_string (rv, 10430.378350470453);
- sh_fsca_df2int_rtx = const_double_from_real_value (rv, DFmode);
-}
-
- return sh_fsca_df2int_rtx;
-}
-
/* This function returns a constant rtx that represents 2**15 / pi in
SFmode. it's used to scale a fixed-point signed 16.16-bit fraction
of a full circle back to a SFmode value, i.e., 0x1 maps to
Index: gcc/config/sh/sh.md
===
--- gcc/config/sh/sh.md (revision 18)
+++ gcc/config/sh/sh.md (working copy)
@@ -10658,48 +10658,6 @@
DONE;
})
-(define_expand sindf2
- [(set (match_operand:DF 0 fp_arith_reg_operand )
- (unspec:DF [(match_operand:DF 1 fp_arith_reg_operand )]
- UNSPEC_FSINA))]
- TARGET_SH4A_FP ! TARGET_FPU_SINGLE flag_unsafe_math_optimizations
-{
- rtx scaled = gen_reg_rtx (DFmode);
- rtx truncated = gen_reg_rtx (SImode);
- rtx fsca = gen_reg_rtx (V2SFmode);
- rtx scale_reg = force_reg (DFmode, sh_fsca_df2int ());
- rtx sfresult = gen_reg_rtx (SFmode);
-
- emit_df_insn (gen_muldf3 (scaled, operands[1], scale_reg));
- emit_df_insn (gen_fix_truncdfsi2 (truncated, scaled));
- emit_sf_insn (gen_fsca (fsca, truncated, sh_fsca_int2sf (),
- get_fpscr_rtx ()));
- emit_move_insn (sfresult, gen_rtx_SUBREG (SFmode, fsca, 0));
