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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /lib/zlib_dfltcc/dfltcc_util.h | |
parent | Initial commit. (diff) | |
download | linux-upstream/6.1.76.tar.xz linux-upstream/6.1.76.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/zlib_dfltcc/dfltcc_util.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib/zlib_dfltcc/dfltcc_util.h b/lib/zlib_dfltcc/dfltcc_util.h new file mode 100644 index 000000000..4a46b5009 --- /dev/null +++ b/lib/zlib_dfltcc/dfltcc_util.h @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: Zlib +#ifndef DFLTCC_UTIL_H +#define DFLTCC_UTIL_H + +#include <linux/zutil.h> + +/* + * C wrapper for the DEFLATE CONVERSION CALL instruction. + */ +typedef enum { + DFLTCC_CC_OK = 0, + DFLTCC_CC_OP1_TOO_SHORT = 1, + DFLTCC_CC_OP2_TOO_SHORT = 2, + DFLTCC_CC_OP2_CORRUPT = 2, + DFLTCC_CC_AGAIN = 3, +} dfltcc_cc; + +#define DFLTCC_QAF 0 +#define DFLTCC_GDHT 1 +#define DFLTCC_CMPR 2 +#define DFLTCC_XPND 4 +#define HBT_CIRCULAR (1 << 7) +#define HB_BITS 15 +#define HB_SIZE (1 << HB_BITS) + +static inline dfltcc_cc dfltcc( + int fn, + void *param, + Byte **op1, + size_t *len1, + const Byte **op2, + size_t *len2, + void *hist +) +{ + Byte *t2 = op1 ? *op1 : NULL; + size_t t3 = len1 ? *len1 : 0; + const Byte *t4 = op2 ? *op2 : NULL; + size_t t5 = len2 ? *len2 : 0; + register int r0 __asm__("r0") = fn; + register void *r1 __asm__("r1") = param; + register Byte *r2 __asm__("r2") = t2; + register size_t r3 __asm__("r3") = t3; + register const Byte *r4 __asm__("r4") = t4; + register size_t r5 __asm__("r5") = t5; + int cc; + + __asm__ volatile( + ".insn rrf,0xb9390000,%[r2],%[r4],%[hist],0\n" + "ipm %[cc]\n" + : [r2] "+r" (r2) + , [r3] "+r" (r3) + , [r4] "+r" (r4) + , [r5] "+r" (r5) + , [cc] "=r" (cc) + : [r0] "r" (r0) + , [r1] "r" (r1) + , [hist] "r" (hist) + : "cc", "memory"); + t2 = r2; t3 = r3; t4 = r4; t5 = r5; + + if (op1) + *op1 = t2; + if (len1) + *len1 = t3; + if (op2) + *op2 = t4; + if (len2) + *len2 = t5; + return (cc >> 28) & 3; +} + +static inline int is_bit_set( + const char *bits, + int n +) +{ + return bits[n / 8] & (1 << (7 - (n % 8))); +} + +static inline void turn_bit_off( + char *bits, + int n +) +{ + bits[n / 8] &= ~(1 << (7 - (n % 8))); +} + +static inline int dfltcc_are_params_ok( + int level, + uInt window_bits, + int strategy, + uLong level_mask +) +{ + return (level_mask & (1 << level)) != 0 && + (window_bits == HB_BITS) && + (strategy == Z_DEFAULT_STRATEGY); +} + +char *oesc_msg(char *buf, int oesc); + +#endif /* DFLTCC_UTIL_H */ |