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-rw-r--r--sysdeps/mips/memcpy.S177
1 files changed, 164 insertions, 13 deletions
diff --git a/sysdeps/mips/memcpy.S b/sysdeps/mips/memcpy.S
index 6a174e6e25..fcd7c0368c 100644
--- a/sysdeps/mips/memcpy.S
+++ b/sysdeps/mips/memcpy.S
@@ -51,6 +51,13 @@
#endif
+#if __mips_isa_rev > 5
+# if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
+# undef PREFETCH_STORE_HINT
+# define PREFETCH_STORE_HINT PREFETCH_HINT_STORE_STREAMED
+# endif
+# define R6_CODE
+#endif
/* Some asm.h files do not have the L macro definition. */
#ifndef L
@@ -79,6 +86,14 @@
# endif
#endif
+/* New R6 instructions that may not be in asm.h. */
+#ifndef PTR_LSA
+# if _MIPS_SIM == _ABI64
+# define PTR_LSA dlsa
+# else
+# define PTR_LSA lsa
+# endif
+#endif
/*
* Using PREFETCH_HINT_LOAD_STREAMED instead of PREFETCH_LOAD on load
@@ -221,6 +236,7 @@
# define C_LDLO ldl /* low part is left in little-endian */
# define C_STLO sdl /* low part is left in little-endian */
# endif
+# define C_ALIGN dalign /* r6 align instruction */
#else
# define C_ST sw
# define C_LD lw
@@ -235,6 +251,7 @@
# define C_LDLO lwl /* low part is left in little-endian */
# define C_STLO swl /* low part is left in little-endian */
# endif
+# define C_ALIGN align /* r6 align instruction */
#endif
/* Bookkeeping values for 32 vs. 64 bit mode. */
@@ -285,6 +302,9 @@ L(memcpy):
#else
move v0,a0
#endif
+
+#ifndef R6_CODE
+
/*
* If src and dst have different alignments, go to L(unaligned), if they
* have the same alignment (but are not actually aligned) do a partial
@@ -305,6 +325,74 @@ L(memcpy):
C_STHI t8,0(a0)
PTR_ADDU a0,a0,a3
+#else /* R6_CODE */
+
+/*
+ * Align the destination and hope that the source gets aligned too. If it
+ * doesn't we jump to L(r6_unaligned*) to do unaligned copies using the r6
+ * align instruction.
+ */
+ andi t8,a0,7
+ lapc t9,L(atable)
+ PTR_LSA t9,t8,t9,2
+ jrc t9
+L(atable):
+ bc L(lb0)
+ bc L(lb7)
+ bc L(lb6)
+ bc L(lb5)
+ bc L(lb4)
+ bc L(lb3)
+ bc L(lb2)
+ bc L(lb1)
+L(lb7):
+ lb a3, 6(a1)
+ sb a3, 6(a0)
+L(lb6):
+ lb a3, 5(a1)
+ sb a3, 5(a0)
+L(lb5):
+ lb a3, 4(a1)
+ sb a3, 4(a0)
+L(lb4):
+ lb a3, 3(a1)
+ sb a3, 3(a0)
+L(lb3):
+ lb a3, 2(a1)
+ sb a3, 2(a0)
+L(lb2):
+ lb a3, 1(a1)
+ sb a3, 1(a0)
+L(lb1):
+ lb a3, 0(a1)
+ sb a3, 0(a0)
+
+ li t9,8
+ subu t8,t9,t8
+ PTR_SUBU a2,a2,t8
+ PTR_ADDU a0,a0,t8
+ PTR_ADDU a1,a1,t8
+L(lb0):
+
+ andi t8,a1,(NSIZE-1)
+ lapc t9,L(jtable)
+ PTR_LSA t9,t8,t9,2
+ jrc t9
+L(jtable):
+ bc L(aligned)
+ bc L(r6_unaligned1)
+ bc L(r6_unaligned2)
+ bc L(r6_unaligned3)
+# ifdef USE_DOUBLE
+ bc L(r6_unaligned4)
+ bc L(r6_unaligned5)
+ bc L(r6_unaligned6)
+ bc L(r6_unaligned7)
+# endif
+#endif /* R6_CODE */
+
+L(aligned):
+
/*
* Now dst/src are both aligned to (word or double word) aligned addresses
* Set a2 to count how many bytes we have to copy after all the 64/128 byte
@@ -313,7 +401,6 @@ L(memcpy):
* equals a3.
*/
-L(aligned):
andi t8,a2,NSIZEDMASK /* any whole 64-byte/128-byte chunks? */
beq a2,t8,L(chkw) /* if a2==t8, no 64-byte/128-byte chunks */
PTR_SUBU a3,a2,t8 /* subtract from a2 the reminder */
@@ -363,8 +450,12 @@ L(loop16w):
bgtz v1,L(skip_pref)
#endif
C_LD t1,UNIT(1)(a1)
+#ifdef R6_CODE
+ PREFETCH_FOR_STORE (2, a0)
+#else
PREFETCH_FOR_STORE (4, a0)
PREFETCH_FOR_STORE (5, a0)
+#endif
#if defined(RETURN_LAST_PREFETCH) && defined(USE_PREFETCH)
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*5)
# ifdef USE_DOUBLE
@@ -378,8 +469,11 @@ L(skip_pref):
C_LD REG5,UNIT(5)(a1)
C_LD REG6,UNIT(6)(a1)
C_LD REG7,UNIT(7)(a1)
- PREFETCH_FOR_LOAD (4, a1)
-
+#ifdef R6_CODE
+ PREFETCH_FOR_LOAD (3, a1)
+#else
+ PREFETCH_FOR_LOAD (4, a1)
+#endif
C_ST t0,UNIT(0)(a0)
C_ST t1,UNIT(1)(a0)
C_ST REG2,UNIT(2)(a0)
@@ -397,7 +491,9 @@ L(skip_pref):
C_LD REG5,UNIT(13)(a1)
C_LD REG6,UNIT(14)(a1)
C_LD REG7,UNIT(15)(a1)
+#ifndef R6_CODE
PREFETCH_FOR_LOAD (5, a1)
+#endif
C_ST t0,UNIT(8)(a0)
C_ST t1,UNIT(9)(a0)
C_ST REG2,UNIT(10)(a0)
@@ -476,6 +572,8 @@ L(lastbloop):
L(leave):
j ra
nop
+
+#ifndef R6_CODE
/*
* UNALIGNED case, got here with a3 = "negu a0"
* This code is nearly identical to the aligned code above
@@ -510,38 +608,38 @@ L(ua_chk16w):
PTR_SUBU a3,a2,t8 /* subtract from a2 the reminder */
PTR_ADDU a3,a0,a3 /* Now a3 is the final dst after loop */
-#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
+# if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
PTR_ADDU t0,a0,a2 /* t0 is the "past the end" address */
PTR_SUBU t9,t0,PREFETCH_LIMIT /* t9 is the "last safe pref" address */
-#endif
+# endif
PREFETCH_FOR_LOAD (0, a1)
PREFETCH_FOR_LOAD (1, a1)
PREFETCH_FOR_LOAD (2, a1)
-#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
+# if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT != PREFETCH_HINT_PREPAREFORSTORE)
PREFETCH_FOR_STORE (1, a0)
PREFETCH_FOR_STORE (2, a0)
PREFETCH_FOR_STORE (3, a0)
-#endif
-#if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
-# if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
+# endif
+# if defined(RETURN_FIRST_PREFETCH) && defined(USE_PREFETCH)
+# if (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
sltu v1,t9,a0
bgtz v1,L(ua_skip_set)
nop
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*4)
L(ua_skip_set):
-# else
+# else
PTR_ADDIU v0,a0,(PREFETCH_CHUNK*1)
+# endif
# endif
-#endif
L(ua_loop16w):
PREFETCH_FOR_LOAD (3, a1)
C_LDHI t0,UNIT(0)(a1)
C_LDHI t1,UNIT(1)(a1)
C_LDHI REG2,UNIT(2)(a1)
-#if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
+# if defined(USE_PREFETCH) && (PREFETCH_STORE_HINT == PREFETCH_HINT_PREPAREFORSTORE)
sltu v1,t9,a0
bgtz v1,L(ua_skip_pref)
-#endif
+# endif
C_LDHI REG3,UNIT(3)(a1)
PREFETCH_FOR_STORE (4, a0)
PREFETCH_FOR_STORE (5, a0)
@@ -667,6 +765,59 @@ L(ua_smallCopy_loop):
j ra
nop
+#else /* R6_CODE */
+
+# if __MIPSEB
+# define SWAP_REGS(X,Y) X, Y
+# define ALIGN_OFFSET(N) (N)
+# else
+# define SWAP_REGS(X,Y) Y, X
+# define ALIGN_OFFSET(N) (NSIZE-N)
+# endif
+# define R6_UNALIGNED_WORD_COPY(BYTEOFFSET) \
+ andi REG7, a2, (NSIZE-1);/* REG7 is # of bytes to by bytes. */ \
+ beq REG7, a2, L(lastb); /* Check for bytes to copy by word */ \
+ PTR_SUBU a3, a2, REG7; /* a3 is number of bytes to be copied in */ \
+ /* (d)word chunks. */ \
+ move a2, REG7; /* a2 is # of bytes to copy byte by byte */ \
+ /* after word loop is finished. */ \
+ PTR_ADDU REG6, a0, a3; /* REG6 is the dst address after loop. */ \
+ PTR_SUBU REG2, a1, t8; /* REG2 is the aligned src address. */ \
+ PTR_ADDU a1, a1, a3; /* a1 is addr of source after word loop. */ \
+ C_LD t0, UNIT(0)(REG2); /* Load first part of source. */ \
+L(r6_ua_wordcopy##BYTEOFFSET): \
+ C_LD t1, UNIT(1)(REG2); /* Load second part of source. */ \
+ C_ALIGN REG3, SWAP_REGS(t1,t0), ALIGN_OFFSET(BYTEOFFSET); \
+ PTR_ADDIU a0, a0, UNIT(1); /* Increment destination pointer. */ \
+ PTR_ADDIU REG2, REG2, UNIT(1); /* Increment aligned source pointer.*/ \
+ move t0, t1; /* Move second part of source to first. */ \
+ bne a0, REG6,L(r6_ua_wordcopy##BYTEOFFSET); \
+ C_ST REG3, UNIT(-1)(a0); \
+ j L(lastb); \
+ nop
+
+ /* We are generating R6 code, the destination is 4 byte aligned and
+ the source is not 4 byte aligned. t8 is 1, 2, or 3 depending on the
+ alignment of the source. */
+
+L(r6_unaligned1):
+ R6_UNALIGNED_WORD_COPY(1)
+L(r6_unaligned2):
+ R6_UNALIGNED_WORD_COPY(2)
+L(r6_unaligned3):
+ R6_UNALIGNED_WORD_COPY(3)
+# ifdef USE_DOUBLE
+L(r6_unaligned4):
+ R6_UNALIGNED_WORD_COPY(4)
+L(r6_unaligned5):
+ R6_UNALIGNED_WORD_COPY(5)
+L(r6_unaligned6):
+ R6_UNALIGNED_WORD_COPY(6)
+L(r6_unaligned7):
+ R6_UNALIGNED_WORD_COPY(7)
+# endif
+#endif /* R6_CODE */
+
.set at
.set reorder
END(MEMCPY_NAME)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 12:05:36 +0000