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188 lines
7.2 KiB
188 lines
7.2 KiB
From 8430e4e5d5da2ed14d33638c476654c2a0474d2a Mon Sep 17 00:00:00 2001 |
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From: Stefan Liebler <stli@linux.vnet.ibm.com> |
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Date: Thu, 27 Jul 2017 10:53:59 +0200 |
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Subject: [PATCH 09/10] S390: Use cu24 instruction for converting from utf16 to |
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utf32. |
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upstream-commit f0137ff31da85bc7d9bd4e621af958d8b7249475 |
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This patch adds an ifunc variant to use the cu instruction on arch12 CPUs. |
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This new ifunc variant can be built if binutils support z13 vector |
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instructions. At runtime, HWCAP_S390_VXE decides if we can use the |
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cu24 instruction. |
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ChangeLog: |
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* sysdeps/s390/utf16-utf32-z9.c (__from_utf16_loop_vx_cu): |
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Use vector and cu24 instruction. |
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* sysdeps/s390/multiarch/utf16-utf32-z9.c: |
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Add __from_utf16_loop_vx_cu in ifunc resolver. |
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--- |
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sysdeps/s390/multiarch/utf16-utf32-z9.c | 8 ++- |
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sysdeps/s390/utf16-utf32-z9.c | 113 +++++++++++++++++++++++++++++++- |
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2 files changed, 117 insertions(+), 4 deletions(-) |
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diff --git a/sysdeps/s390/multiarch/utf16-utf32-z9.c b/sysdeps/s390/multiarch/utf16-utf32-z9.c |
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index ded3cc2..917de5f 100644 |
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--- a/sysdeps/s390/multiarch/utf16-utf32-z9.c |
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+++ b/sysdeps/s390/multiarch/utf16-utf32-z9.c |
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@@ -32,9 +32,11 @@ strong_alias (SINGLE_NAME (TO_LOOP_DEFAULT), SINGLE_NAME (TO_LOOP)) |
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/* Generate ifunc'ed loop functions for FROM/TO_LOOP. */ |
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s390_libc_ifunc_expr (FROM_LOOP_DEFAULT, FROM_LOOP, |
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- (HAVE_FROM_VX && (hwcap & HWCAP_S390_VX)) |
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- ? FROM_LOOP_VX |
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- : FROM_LOOP_DEFAULT); |
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+ (HAVE_FROM_VX_CU && (hwcap & HWCAP_S390_VXE)) |
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+ ? FROM_LOOP_VX_CU |
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+ : (HAVE_FROM_VX && (hwcap & HWCAP_S390_VX)) |
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+ ? FROM_LOOP_VX |
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+ : FROM_LOOP_DEFAULT); |
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s390_libc_ifunc_expr (TO_LOOP_DEFAULT, TO_LOOP, |
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(HAVE_TO_VX_CU && (hwcap & HWCAP_S390_VXE)) |
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diff --git a/sysdeps/s390/utf16-utf32-z9.c b/sysdeps/s390/utf16-utf32-z9.c |
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index b1728d6..c09a425 100644 |
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--- a/sysdeps/s390/utf16-utf32-z9.c |
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+++ b/sysdeps/s390/utf16-utf32-z9.c |
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@@ -39,10 +39,12 @@ |
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#if defined HAVE_S390_VX_ASM_SUPPORT && defined USE_MULTIARCH |
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# define HAVE_FROM_VX 1 |
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+# define HAVE_FROM_VX_CU 1 |
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# define HAVE_TO_VX 1 |
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# define HAVE_TO_VX_CU 1 |
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#else |
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# define HAVE_FROM_VX 0 |
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+# define HAVE_FROM_VX_CU 0 |
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# define HAVE_TO_VX 0 |
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# define HAVE_TO_VX_CU 0 |
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#endif |
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@@ -383,7 +385,6 @@ gconv_end (struct __gconv_step *data) |
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STANDARD_FROM_LOOP_ERR_HANDLER (2); \ |
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} |
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- |
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/* Generate loop-function with hardware vector instructions. */ |
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# define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
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# define MAX_NEEDED_INPUT MAX_NEEDED_FROM |
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@@ -397,6 +398,116 @@ gconv_end (struct __gconv_step *data) |
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# define FROM_LOOP_VX NULL |
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#endif /* HAVE_FROM_VX != 1 */ |
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+#if HAVE_FROM_VX_CU == 1 |
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+#define BODY_FROM_VX_CU \ |
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+ { \ |
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+ register const unsigned char* pInput asm ("8") = inptr; \ |
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+ register size_t inlen asm ("9") = inend - inptr; \ |
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+ register unsigned char* pOutput asm ("10") = outptr; \ |
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+ register size_t outlen asm ("11") = outend - outptr; \ |
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+ unsigned long tmp, tmp2, tmp3; \ |
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+ asm volatile (".machine push\n\t" \ |
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+ ".machine \"z13\"\n\t" \ |
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+ ".machinemode \"zarch_nohighgprs\"\n\t" \ |
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+ /* Setup to check for surrogates. */ \ |
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+ " larl %[R_TMP],9f\n\t" \ |
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+ " vlm %%v30,%%v31,0(%[R_TMP])\n\t" \ |
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+ CONVERT_32BIT_SIZE_T ([R_INLEN]) \ |
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+ CONVERT_32BIT_SIZE_T ([R_OUTLEN]) \ |
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+ /* Loop which handles UTF-16 chars <0xd800, >0xdfff. */ \ |
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+ "0: clgijl %[R_INLEN],16,20f\n\t" \ |
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+ " clgijl %[R_OUTLEN],32,20f\n\t" \ |
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+ "1: vl %%v16,0(%[R_IN])\n\t" \ |
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+ /* Check for surrogate chars. */ \ |
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+ " vstrchs %%v19,%%v16,%%v30,%%v31\n\t" \ |
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+ " jno 10f\n\t" \ |
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+ /* Enlarge to UTF-32. */ \ |
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+ " vuplhh %%v17,%%v16\n\t" \ |
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+ " la %[R_IN],16(%[R_IN])\n\t" \ |
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+ " vupllh %%v18,%%v16\n\t" \ |
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+ " aghi %[R_INLEN],-16\n\t" \ |
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+ /* Store 32 bytes to buf_out. */ \ |
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+ " vstm %%v17,%%v18,0(%[R_OUT])\n\t" \ |
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+ " aghi %[R_OUTLEN],-32\n\t" \ |
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+ " la %[R_OUT],32(%[R_OUT])\n\t" \ |
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+ " clgijl %[R_INLEN],16,20f\n\t" \ |
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+ " clgijl %[R_OUTLEN],32,20f\n\t" \ |
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+ " j 1b\n\t" \ |
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+ /* Setup to check for ch >= 0xd800 && ch <= 0xdfff. (v30, v31) */ \ |
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+ "9: .short 0xd800,0xdfff,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \ |
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+ " .short 0xa000,0xc000,0x0,0x0,0x0,0x0,0x0,0x0\n\t" \ |
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+ /* At least one uint16_t is in range of surrogates. \ |
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+ Store the preceding chars. */ \ |
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+ "10: vlgvb %[R_TMP],%%v19,7\n\t" \ |
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+ " vuplhh %%v17,%%v16\n\t" \ |
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+ " sllg %[R_TMP3],%[R_TMP],1\n\t" /* Number of out bytes. */ \ |
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+ " ahik %[R_TMP2],%[R_TMP3],-1\n\t" /* Highest index to store. */ \ |
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+ " jl 20f\n\t" \ |
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+ " vstl %%v17,%[R_TMP2],0(%[R_OUT])\n\t" \ |
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+ " vupllh %%v18,%%v16\n\t" \ |
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+ " ahi %[R_TMP2],-16\n\t" \ |
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+ " jl 11f\n\t" \ |
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+ " vstl %%v18,%[R_TMP2],16(%[R_OUT])\n\t" \ |
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+ "11: \n\t" /* Update pointers. */ \ |
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+ " la %[R_IN],0(%[R_TMP],%[R_IN])\n\t" \ |
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+ " slgr %[R_INLEN],%[R_TMP]\n\t" \ |
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+ " la %[R_OUT],0(%[R_TMP3],%[R_OUT])\n\t" \ |
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+ " slgr %[R_OUTLEN],%[R_TMP3]\n\t" \ |
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+ /* Handles UTF16 surrogates with convert instruction. */ \ |
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+ "20: cu24 %[R_OUT],%[R_IN],1\n\t" \ |
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+ " jo 0b\n\t" /* Try vector implemenation again. */ \ |
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+ " lochil %[R_RES],%[RES_OUT_FULL]\n\t" /* cc == 1. */ \ |
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+ " lochih %[R_RES],%[RES_IN_ILL]\n\t" /* cc == 2. */ \ |
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+ ".machine pop" \ |
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+ : /* outputs */ [R_IN] "+a" (pInput) \ |
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+ , [R_INLEN] "+d" (inlen), [R_OUT] "+a" (pOutput) \ |
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+ , [R_OUTLEN] "+d" (outlen), [R_TMP] "=a" (tmp) \ |
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+ , [R_TMP2] "=d" (tmp2), [R_TMP3] "=a" (tmp3) \ |
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+ , [R_RES] "+d" (result) \ |
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+ : /* inputs */ \ |
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+ [RES_OUT_FULL] "i" (__GCONV_FULL_OUTPUT) \ |
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+ , [RES_IN_ILL] "i" (__GCONV_ILLEGAL_INPUT) \ |
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+ : /* clobber list */ "memory", "cc" \ |
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+ ASM_CLOBBER_VR ("v16") ASM_CLOBBER_VR ("v17") \ |
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+ ASM_CLOBBER_VR ("v18") ASM_CLOBBER_VR ("v19") \ |
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+ ASM_CLOBBER_VR ("v30") ASM_CLOBBER_VR ("v31") \ |
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+ ); \ |
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+ inptr = pInput; \ |
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+ outptr = pOutput; \ |
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+ \ |
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+ if (__glibc_likely (inlen == 0) \ |
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+ || result == __GCONV_FULL_OUTPUT) \ |
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+ break; \ |
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+ if (inlen == 1) \ |
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+ { \ |
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+ /* Input does not contain a complete utf16 character. */ \ |
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+ result = __GCONV_INCOMPLETE_INPUT; \ |
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+ break; \ |
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+ } \ |
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+ else if (result != __GCONV_ILLEGAL_INPUT) \ |
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+ { \ |
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+ /* Input is >= 2 and < 4 bytes (as cu24 would have processed \ |
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+ a possible next utf16 character) and not illegal. \ |
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+ => we have a single high surrogate at end of input. */ \ |
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+ result = __GCONV_INCOMPLETE_INPUT; \ |
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+ break; \ |
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+ } \ |
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+ \ |
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+ STANDARD_FROM_LOOP_ERR_HANDLER (2); \ |
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+ } |
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+ |
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+/* Generate loop-function with hardware vector and utf-convert instructions. */ |
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+# define MIN_NEEDED_INPUT MIN_NEEDED_FROM |
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+# define MAX_NEEDED_INPUT MAX_NEEDED_FROM |
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+# define MIN_NEEDED_OUTPUT MIN_NEEDED_TO |
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+# define FROM_LOOP_VX_CU __from_utf16_loop_vx_cu |
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+# define LOOPFCT FROM_LOOP_VX_CU |
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+# define LOOP_NEED_FLAGS |
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+# define BODY BODY_FROM_VX_CU |
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+# include <iconv/loop.c> |
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+#else |
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+# define FROM_LOOP_VX_CU NULL |
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+#endif /* HAVE_FROM_VX_CU != 1 */ |
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/* Conversion from UTF-32 internal/BE to UTF-16. */ |
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-- |
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1.8.3.1 |
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