Skip to content

R
riscv-gcc-1
Commit 7fe43755 by Matthew Wahab Committed by Matthew Wahab
Options

[Testsuite] Selectors and options directives for ARM VFP FP16 support. 

gcc/
	* doc/sourcebuild.texi (Effective-Target keywords): Add entries
	for arm_fp16_ok and arm_fp16_hw.
	(Add Options): Add entries for arm_fp16, arm_fp16_ieee and
	arm_fp16_alternative.

testsuite/
	* lib/target-supports.exp (add_options_for arm_fp16): Reword
	comment.
	(add_options_for_arm_fp16_ieee): New.
	(add_options_for_arm_fp16_alternative): New.
	(effective_target_arm_fp16_ok_nocache): Add to comment.  Fix a
	long-line.
	(effective_target_arm_fp16_hw): New.

From-SVN: r237847
parent 264d951a
Showing with 102 additions and 5 deletions
gcc/ChangeLog
2016-06-29 Matthew Wahab <matthew.wahab@arm.com>
* doc/sourcebuild.texi (Effective-Target keywords): Add entries
for arm_fp16_ok and arm_fp16_hw.
(Add Options): Add entries for arm_fp16, arm_fp16_ieee and
arm_fp16_alternative.
2016-06-29 Ilya Enkovich <ilya.enkovich@intel.com>
PR tree-optimization/71655
......
gcc/doc/sourcebuild.texi
......@@ -1555,6 +1555,16 @@ options. Some multilibs may be incompatible with these options.
ARM Target supports @code{-mfpu=neon-vfpv4 -mfloat-abi=softfp} or compatible
options. Some multilibs may be incompatible with these options.
@item arm_fp16_ok
@anchor{arm_fp16_ok}
Target supports options to generate VFP half-precision floating-point
instructions. Some multilibs may be incompatible with these
options. This test is valid for ARM only.
@item arm_fp16_hw
Target supports executing VFP half-precision floating-point
instructions. This test is valid for ARM only.
@item arm_neon_fp16_ok
@anchor{arm_neon_fp16_ok}
ARM Target supports @code{-mfpu=neon-fp16 -mfloat-abi=softfp} or compatible
......@@ -2075,6 +2085,28 @@ NEON support. Only ARM targets support this feature, and only then
in certain modes; see the @ref{arm_neon_ok,,arm_neon_ok effective target
keyword}.
@item arm_fp16
VFP half-precision floating point support. This does not select the
FP16 format; for that, use @ref{arm_fp16_ieee,,arm_fp16_ieee} or
@ref{arm_fp16_alternative,,arm_fp16_alternative} instead. This
feature is only supported by ARM targets and then only in certain
modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
keyword}.
@item arm_fp16_ieee
@anchor{arm_fp16_ieee}
ARM IEEE 754-2008 format VFP half-precision floating point support.
This feature is only supported by ARM targets and then only in certain
modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
keyword}.
@item arm_fp16_alternative
@anchor{arm_fp16_alternative}
ARM Alternative format VFP half-precision floating point support.
This feature is only supported by ARM targets and then only in certain
modes; see the @ref{arm_fp16_ok,,arm_fp16_ok effective target
keyword}.
@item arm_neon_fp16
NEON and half-precision floating point support. Only ARM targets
support this feature, and only then in certain modes; see
......
gcc/testsuite/ChangeLog
2016-06-29 Matthew Wahab <matthew.wahab@arm.com>
* lib/target-supports.exp (add_options_for_arm_fp16): Reword
comment.
(add_options_for_arm_fp16_ieee): New.
(add_options_for_arm_fp16_alternative): New.
(effective_target_arm_fp16_ok_nocache): Add to comment. Fix a
long-line.
(effective_target_arm_fp16_hw): New.
2016-06-29 Ilya Enkovich <ilya.enkovich@intel.com>
PR tree-optimization/71655
......
gcc/testsuite/lib/target-supports.exp
......@@ -3184,9 +3184,9 @@ proc check_effective_target_arm_neonv2_ok { } {
check_effective_target_arm_neonv2_ok_nocache]
}
# Add the options needed for NEON. We need either -mfloat-abi=softfp
# or -mfloat-abi=hard, but if one is already specified by the
# multilib, use it.
# Add the options needed for VFP FP16 support. We need either
# -mfloat-abi=softfp or -mfloat-abi=hard. If one is already specified by
# the multilib, use it.
proc add_options_for_arm_fp16 { flags } {
if { ! [check_effective_target_arm_fp16_ok] } {
......@@ -3196,9 +3196,32 @@ proc add_options_for_arm_fp16 { flags } {
return "$flags $et_arm_fp16_flags"
}
# Add the options needed to enable support for IEEE format
# half-precision support. This is valid for ARM targets.
proc add_options_for_arm_fp16_ieee { flags } {
if { ! [check_effective_target_arm_fp16_ok] } {
return "$flags"
}
global et_arm_fp16_flags
return "$flags $et_arm_fp16_flags -mfp16-format=ieee"
}
# Add the options needed to enable support for ARM Alternative format
# half-precision support. This is valid for ARM targets.
proc add_options_for_arm_fp16_alternative { flags } {
if { ! [check_effective_target_arm_fp16_ok] } {
return "$flags"
}
global et_arm_fp16_flags
return "$flags $et_arm_fp16_flags -mfp16-format=alternative"
}
# Return 1 if this is an ARM target that can support a VFP fp16 variant.
# Skip multilibs that are incompatible with these options and set
# et_arm_fp16_flags to the best options to add.
# et_arm_fp16_flags to the best options to add. This test is valid for
# ARM only.
proc check_effective_target_arm_fp16_ok_nocache { } {
global et_arm_fp16_flags
......@@ -3206,7 +3229,10 @@ proc check_effective_target_arm_fp16_ok_nocache { } {
if { ! [check_effective_target_arm32] } {
return 0;
}
if [check-flags [list "" { *-*-* } { "-mfpu=*" } { "-mfpu=*fp16*" "-mfpu=*fpv[4-9]*" "-mfpu=*fpv[1-9][0-9]*" } ]] {
if [check-flags \
[list "" { *-*-* } { "-mfpu=*" } \
{ "-mfpu=*fp16*" "-mfpu=*fpv[4-9]*" \
"-mfpu=*fpv[1-9][0-9]*" "-mfpu=*fp-armv8*" } ]] {
# Multilib flags would override -mfpu.
return 0
}
......@@ -3242,6 +3268,28 @@ proc check_effective_target_arm_fp16_ok { } {
check_effective_target_arm_fp16_ok_nocache]
}
# Return 1 if the target supports executing VFP FP16 instructions, 0
# otherwise. This test is valid for ARM only.
proc check_effective_target_arm_fp16_hw { } {
if {! [check_effective_target_arm_fp16_ok] } {
return 0
}
global et_arm_fp16_flags
check_runtime_nocache arm_fp16_hw {
int
main (int argc, char **argv)
{
__fp16 a = 1.0;
float r;
asm ("vcvtb.f32.f16 %0, %1"
: "=w" (r) : "w" (a)
: /* No clobbers. */);
return (r == 1.0) ? 0 : 1;
}
} "$et_arm_fp16_flags -mfp16-format=ieee"
}
# Creates a series of routines that return 1 if the given architecture
# can be selected and a routine to give the flags to select that architecture
# Note: Extra flags may be added to disable options from newer compilers
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment