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Emit Tag_ABI_FP_16bit_format build attribute.

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The __fp16 type is unconditionally exposed. Since -mfp16-format is not yet
supported, there is not a user switch to change this behaviour. This build
attribute should capture the default behaviour of the compiler, which is to
expose the IEEE 754 version of __fp16.

When -mfp16-format is emitted, that will be the way to control the value of
this build attribute.

Change-Id: I8a46641ff0fd2ef8ad0af5f482a6d1af2ac3f6b0
llvm-svn: 224115
This commit is contained in:
Charlie Turner 2014-12-12 11:59:18 +00:00
parent 718583fb16
commit 8bc4c033ad
3 changed files with 31 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/llvm/Support/ARMBuildAttributes.h
View File

@ -200,6 +200,9 @@ enum {
// Tag_FP_HP_extension, (=36), uleb128
AllowHPFP = 1, // Allow use of Half Precision FP
// Tag_FP_16bit_format, (=38), uleb128
FP16FormatIEEE = 1,
// Tag_MPextension_use, (=42), uleb128
AllowMP = 1, // Allow use of MP extensions

7
lib/Target/ARM/ARMAsmPrinter.cpp
View File

@ -782,6 +782,13 @@ void ARMAsmPrinter::emitAttributes() {
if (Subtarget->hasFP16())
ATS.emitAttribute(ARMBuildAttrs::FP_HP_extension, ARMBuildAttrs::AllowHPFP);
// FIXME: To support emitting this build attribute as GCC does, the
// -mfp16-format option and associated plumbing must be
// supported. For now the __fp16 type is exposed by default, so this
// attribute should be emitted with value 1.
ATS.emitAttribute(ARMBuildAttrs::ABI_FP_16bit_format,
ARMBuildAttrs::FP16FormatIEEE);
if (Subtarget->hasMPExtension())
ATS.emitAttribute(ARMBuildAttrs::MPextension_use, ARMBuildAttrs::AllowMP);

21
test/CodeGen/ARM/build-attributes.ll
View File

@ -148,6 +148,7 @@
; V6-NOT: .eabi_attribute 27
; V6-NOT: .eabi_attribute 28
; V6-NOT: .eabi_attribute 36
; V6: .eabi_attribute 38, 1
; V6-NOT: .eabi_attribute 42
; V6-NOT: .eabi_attribute 68
@ -178,6 +179,7 @@
; V6M-NOT: .eabi_attribute 27
; V6M-NOT: .eabi_attribute 28
; V6M-NOT: .eabi_attribute 36
; V6M: .eabi_attribute 38, 1
; V6M-NOT: .eabi_attribute 42
; V6M-NOT: .eabi_attribute 68
@ -206,6 +208,7 @@
; ARM1156T2F-S-NOT: .eabi_attribute 27
; ARM1156T2F-S-NOT: .eabi_attribute 28
; ARM1156T2F-S-NOT: .eabi_attribute 36
; ARM1156T2F-S: .eabi_attribute 38, 1
; ARM1156T2F-S-NOT: .eabi_attribute 42
; ARM1156T2F-S-NOT: .eabi_attribute 68
@ -236,6 +239,7 @@
; V7M-NOT: .eabi_attribute 27
; V7M-NOT: .eabi_attribute 28
; V7M-NOT: .eabi_attribute 36
; V7M: .eabi_attribute 38, 1
; V7M-NOT: .eabi_attribute 42
; V7M-NOT: .eabi_attribute 44
; V7M-NOT: .eabi_attribute 68
@ -262,6 +266,7 @@
; V7-NOT: .eabi_attribute 27
; V7-NOT: .eabi_attribute 28
; V7-NOT: .eabi_attribute 36
; V7: .eabi_attribute 38, 1
; V7-NOT: .eabi_attribute 42
; V7-NOT: .eabi_attribute 68
@ -389,6 +394,11 @@
; CORTEX-A7-NOFPU: .eabi_attribute 36, 1
; CORTEX-A7-FPUV4: .eabi_attribute 36, 1
; Tag_FP_16bit_format
; CORTEX-A7-CHECK: .eabi_attribute 38, 1
; CORTEX-A7-NOFPU: .eabi_attribute 38, 1
; CORTEX-A7-FPUV4: .eabi_attribute 38, 1
; Tag_MPextension_use
; CORTEX-A7-CHECK: .eabi_attribute 42, 1
; CORTEX-A7-NOFPU: .eabi_attribute 42, 1
@ -496,6 +506,7 @@
; CORTEX-A9-SOFT-NOT: .eabi_attribute 27
; CORTEX-A9-SOFT-NOT: .eabi_attribute 28
; CORTEX-A9-SOFT: .eabi_attribute 36, 1
; CORTEX-A9-SOFT: .eabi_attribute 38, 1
; CORTEX-A9-SOFT: .eabi_attribute 42, 1
; CORTEX-A9-SOFT: .eabi_attribute 68, 1
@ -524,6 +535,7 @@
; CORTEX-A9-HARD-NOT: .eabi_attribute 27
; CORTEX-A9-HARD: .eabi_attribute 28, 1
; CORTEX-A9-HARD: .eabi_attribute 36, 1
; CORTEX-A9-HARD: .eabi_attribute 38, 1
; CORTEX-A9-HARD: .eabi_attribute 42, 1
; CORTEX-A9-HARD: .eabi_attribute 68, 1
@ -605,6 +617,7 @@
; CORTEX-A15-NOT: .eabi_attribute 27
; CORTEX-A15-NOT: .eabi_attribute 28
; CORTEX-A15: .eabi_attribute 36, 1
; CORTEX-A15: .eabi_attribute 38, 1
; CORTEX-A15: .eabi_attribute 42, 1
; CORTEX-A15: .eabi_attribute 44, 2
; CORTEX-A15: .eabi_attribute 68, 3
@ -686,6 +699,7 @@
; CORTEX-M0-NOT: .eabi_attribute 27
; CORTEX-M0-NOT: .eabi_attribute 28
; CORTEX-M0-NOT: .eabi_attribute 36
; CORTEX-M0: .eabi_attribute 38, 1
; CORTEX-M0-NOT: .eabi_attribute 42
; CORTEX-M0-NOT: .eabi_attribute 68
@ -716,6 +730,7 @@
; CORTEX-M3-NOT: .eabi_attribute 27
; CORTEX-M3-NOT: .eabi_attribute 28
; CORTEX-M3-NOT: .eabi_attribute 36
; CORTEX-M3: .eabi_attribute 38, 1
; CORTEX-M3-NOT: .eabi_attribute 42
; CORTEX-M3-NOT: .eabi_attribute 44
; CORTEX-M3-NOT: .eabi_attribute 68
@ -746,6 +761,7 @@
; CORTEX-M4-SOFT: .eabi_attribute 27, 1
; CORTEX-M4-SOFT-NOT: .eabi_attribute 28
; CORTEX-M4-SOFT: .eabi_attribute 36, 1
; CORTEX-M4-SOFT: .eabi_attribute 38, 1
; CORTEX-M4-SOFT-NOT: .eabi_attribute 42
; CORTEX-M4-SOFT-NOT: .eabi_attribute 44
; CORTEX-M4-SOFT-NOT: .eabi_attribute 68
@ -775,6 +791,7 @@
; CORTEX-M4-HARD: .eabi_attribute 27, 1
; CORTEX-M4-HARD: .eabi_attribute 28, 1
; CORTEX-M4-HARD: .eabi_attribute 36, 1
; CORTEX-M4-HARD: .eabi_attribute 38, 1
; CORTEX-M4-HARD-NOT: .eabi_attribute 42
; CORTEX-M4-HARD-NOT: .eabi_attribute 44
; CORTEX-M4-HARD-NOT: .eabi_attribute 68
@ -808,6 +825,7 @@
; CORTEX-M7-SINGLE: .eabi_attribute 27, 1
; CORTEX-M7-DOUBLE-NOT: .eabi_attribute 27
; CORTEX-M7: .eabi_attribute 36, 1
; CORTEX-M7: .eabi_attribute 38, 1
; CORTEX-M7: .eabi_attribute 14, 0
; CORTEX-M7-NOFPU-FAST-NOT: .eabi_attribute 19
@ -838,6 +856,7 @@
; CORTEX-R5: .eabi_attribute 27, 1
; CORTEX-R5-NOT: .eabi_attribute 28
; CORTEX-R5-NOT: .eabi_attribute 36
; CORTEX-R5: .eabi_attribute 38, 1
; CORTEX-R5-NOT: .eabi_attribute 42
; CORTEX-R5: .eabi_attribute 44, 2
; CORTEX-R5-NOT: .eabi_attribute 68
@ -867,6 +886,7 @@
; CORTEX-A53-NOT: .eabi_attribute 27
; CORTEX-A53-NOT: .eabi_attribute 28
; CORTEX-A53: .eabi_attribute 36, 1
; CORTEX-A53: .eabi_attribute 38, 1
; CORTEX-A53: .eabi_attribute 42, 1
; CORTEX-A53-NOT: .eabi_attribute 44
; CORTEX-A53: .eabi_attribute 68, 3
@ -896,6 +916,7 @@
; CORTEX-A57-NOT: .eabi_attribute 27
; CORTEX-A57-NOT: .eabi_attribute 28
; CORTEX-A57: .eabi_attribute 36, 1
; CORTEX-A57: .eabi_attribute 38, 1
; CORTEX-A57: .eabi_attribute 42, 1
; CORTEX-A57-NOT: .eabi_attribute 44
; CORTEX-A57: .eabi_attribute 68, 3