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powerpc: Fix build failures with current GCC
Since GCC commit 271500 (svn), also known as the following commit on the
git mirror:
commit 61edec870f9fdfb5df3fa4e40f28cbaede28a5b1
Author: amodra <amodra@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed May 22 04:34:26 2019 +0000
[RS6000] Don't pass -many to the assembler
glibc builds are failing when an assembly implementation does not
declare the correct '.machine' directive, or when no such directive is
declared at all. For example, when a POWER6 instruction is used, but
'.machine power6' is not declared, the assembler will fail with an error
similar to the following:
../sysdeps/powerpc/powerpc64/power8/strcmp.S: Assembler messages:
24 ../sysdeps/powerpc/powerpc64/power8/strcmp.S:55: Error: unrecognized opcode: `cmpb'
This patch adds '.machine powerN' directives where none existed, as well
as it updates '.machine power7' directives on POWER8 files, because the
minimum binutils version required to build glibc (binutils 2.25) now
provides this machine version. It also adds '-many' to the assembler
command used to build tst-set_ppr.c.
Tested for powerpc, powerpc64, and powerpc64le, as well as with
build-many-glibcs.py for powerpc targets.
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
Gabriel F. T. Gomes
parent
fbd6c928bb
commit
9250e6610f
20
ChangeLog
20
ChangeLog
@ -1,3 +1,23 @@
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2019-05-30 Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
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* sysdeps/powerpc/Makefile
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[$(subdir) == misc] (CFLAGS-tst-set_ppr.c): New variable.
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* sysdeps/powerpc/powerpc64/power4/memcmp.S [__LITTLE_ENDIAN__]:
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Declare '.machine power7' to get support for ldbrx.
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* sysdeps/powerpc/powerpc64/power7/strncmp.S: Declare '.machine'
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directive based on the directory of the file.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_llround.S: Likewise.
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* sysdeps/powerpc/powerpc64/power8/strcmp.S: Likewise.
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* sysdeps/powerpc/powerpc64/power8/strcasecmp.S: Update
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'.machine' directive.
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(VCLZD_V8_v7, MFVRD_R3_V1, VSUBUDM_V9_V8, VPOPCNTD_V8_V8)
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(VADDUQM_V7_V8): Remove.
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(__STRCASECMP): Replace macros with actual instructions.
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* sysdeps/powerpc/powerpc64/power8/strcasestr.S: Update
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'.machine' directive.
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(VCLZD_V8_v7): Remove.
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(STRCASESTR): Replace VCLZD_V8_v7 with actual instruction.
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2019-05-29 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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* sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/get_clockfreq.c:
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@ -45,6 +45,11 @@ ifeq ($(subdir),misc)
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sysdep_headers += sys/platform/ppc.h
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tests += test-gettimebase
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tests += tst-set_ppr
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# This test is expected to run and exit with EXIT_UNSUPPORTED on
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# processors that do not implement the Power ISA 2.06 or greater.
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# But the test makes use of instructions from Power ISA 2.06 and 2.07.
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CFLAGS-tst-set_ppr.c += -Wa,-many
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endif
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ifeq ($(subdir),wcsmbs)
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@ -26,7 +26,14 @@
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# define MEMCMP memcmp
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#endif
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#ifndef __LITTLE_ENDIAN__
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.machine power4
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#else
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/* Little endian is only available since POWER8, so it's safe to
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specify .machine as power8 (or older), even though this is a POWER4
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file. Since the little-endian code uses 'ldbrx', power7 is enough. */
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.machine power7
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#endif
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ENTRY_TOCLESS (MEMCMP, 4)
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CALL_MCOUNT 3
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@ -28,6 +28,7 @@
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const char *s2 [r4],
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size_t size [r5]) */
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.machine power7
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ENTRY_TOCLESS (STRNCMP, 5)
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CALL_MCOUNT 3
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@ -26,6 +26,7 @@
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/* long long [r3] llround (float x [fp1]) */
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.machine power8
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ENTRY_TOCLESS (__llround)
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CALL_MCOUNT 0
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frin fp1,fp1 /* Round to nearest +-0.5. */
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@ -91,21 +91,7 @@
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3: \
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TOLOWER()
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#ifdef _ARCH_PWR8
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# define VCLZD_V8_v7 vclzd v8, v7;
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# define MFVRD_R3_V1 mfvrd r3, v1;
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# define VSUBUDM_V9_V8 vsubudm v9, v9, v8;
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# define VPOPCNTD_V8_V8 vpopcntd v8, v8;
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# define VADDUQM_V7_V8 vadduqm v9, v7, v8;
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#else
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# define VCLZD_V8_v7 .long 0x11003fc2
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# define MFVRD_R3_V1 .long 0x7c230067
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# define VSUBUDM_V9_V8 .long 0x112944c0
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# define VPOPCNTD_V8_V8 .long 0x110047c3
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# define VADDUQM_V7_V8 .long 0x11274100
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#endif
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.machine power7
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.machine power8
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ENTRY (__STRCASECMP)
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#ifdef USE_AS_STRNCASECMP
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@ -265,15 +251,15 @@ L(different):
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#ifdef __LITTLE_ENDIAN__
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/* Count trailing zero. */
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vspltisb v8, -1
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VADDUQM_V7_V8
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vadduqm v9, v7, v8
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vandc v8, v9, v7
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VPOPCNTD_V8_V8
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vpopcntd v8, v8
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vspltb v6, v8, 15
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vcmpequb. v6, v6, v1
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blt cr6, L(shift8)
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#else
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/* Count leading zero. */
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VCLZD_V8_v7
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vclzd v8, v7
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vspltb v6, v8, 7
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vcmpequb. v6, v6, v1
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blt cr6, L(shift8)
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@ -291,7 +277,7 @@ L(skipsum):
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/* Merge and move to GPR. */
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vmrglb v6, v6, v7
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vslo v1, v6, v1
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MFVRD_R3_V1
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mfvrd r3, v1
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/* Place the characters that are different in first position. */
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sldi rSTR2, rRTN, 56
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srdi rSTR2, rSTR2, 56
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@ -301,7 +287,7 @@ L(skipsum):
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vslo v6, v5, v8
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vslo v7, v4, v8
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vmrghb v1, v6, v7
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MFVRD_R3_V1
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mfvrd r3, v1
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srdi rSTR2, rRTN, 48
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sldi rSTR2, rSTR2, 56
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srdi rSTR2, rSTR2, 56
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@ -320,15 +306,15 @@ L(null_found):
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#ifdef __LITTLE_ENDIAN__
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/* Count trailing zero. */
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vspltisb v8, -1
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VADDUQM_V7_V8
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vadduqm v9, v7, v8
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vandc v8, v9, v7
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VPOPCNTD_V8_V8
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vpopcntd v8, v8
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vspltb v6, v8, 15
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vcmpequb. v6, v6, v10
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blt cr6, L(shift_8)
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#else
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/* Count leading zero. */
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VCLZD_V8_v7
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vclzd v8, v7
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vspltb v6, v8, 7
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vcmpequb. v6, v6, v10
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blt cr6, L(shift_8)
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@ -343,10 +329,10 @@ L(skipsum1):
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vspltisb v10, 7
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vslb v10, v10, v10
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vsldoi v9, v0, v10, 1
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VSUBUDM_V9_V8
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vsubudm v9, v9, v8
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vspltisb v8, 8
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vsldoi v8, v0, v8, 1
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VSUBUDM_V9_V8
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vsubudm v9, v9, v8
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/* Shift and remove junk after null character. */
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#ifdef __LITTLE_ENDIAN__
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vslo v5, v5, v9
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@ -73,18 +73,8 @@
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vor reg, v8, reg; \
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vcmpequb. v6, reg, v4;
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/* TODO: change these to the actual instructions when the minimum required
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binutils allows it. */
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#ifdef _ARCH_PWR8
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#define VCLZD_V8_v7 vclzd v8, v7;
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#else
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#define VCLZD_V8_v7 .long 0x11003fc2
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#endif
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#define FRAMESIZE (FRAME_MIN_SIZE+48)
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/* TODO: change this to .machine power8 when the minimum required binutils
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allows it. */
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.machine power7
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.machine power8
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ENTRY (STRCASESTR, 4)
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CALL_MCOUNT 2
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mflr r0 /* Load link register LR to r0. */
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@ -291,7 +281,7 @@ L(nullchk1):
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vcmpequb. v6, v0, v7
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/* Shift r3 by 16 bytes and proceed. */
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blt cr6, L(shift16)
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VCLZD_V8_v7
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vclzd v8, v7
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#ifdef __LITTLE_ENDIAN__
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vspltb v6, v8, 15
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#else
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@ -31,6 +31,7 @@
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64K as default, the page cross handling assumes minimum page size of
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4k. */
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.machine power8
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ENTRY_TOCLESS (STRCMP, 4)
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li r0,0
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