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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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0f61834992
(T1) STRBT reg+#imm8 (T1) STRHT reg+#imm8 (T1) LDRBT reg+#imm8 (T1) LDRSBT reg+#imm8 Pertaining to: 319858 319932 320083 321693 321148 (Vasily, w.golubev@mail.ru) git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13445
109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
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// This should be compiled as Thumb code, since currently V only
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// handles the T1 encoding of ldrt. This all assumes that we are
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// in a little-endian world.
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#include <stdio.h>
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#include <malloc.h>
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typedef unsigned int UInt;
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__attribute__((noinline)) UInt do_ldrt_imm_132 ( unsigned char* p )
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{
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UInt res;
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__asm__ __volatile__(
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"mov r5, %1 ; ldrt r6, [r5, #132] ; mov %0, r6"
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: "=r"(res) : "r"(p) : "r5", "r6"
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);
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return res;
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}
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__attribute__((noinline)) void do_strt_imm_132 ( unsigned char* p, UInt val )
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{
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__asm__ __volatile__(
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"mov r5, %0 ; mov r6, %1 ; strt r6, [r5, #132]"
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: : "r"(p), "r"(val) : "r5", "r6", "memory"
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);
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}
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__attribute__((noinline)) void do_strbt_imm_132 ( unsigned char* p, UInt* val )
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{
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__asm__ __volatile__(
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"mov r5, %0 ; ldr r6, [r5] ; mov r5, %1; strbt r6, [r5, #132]"
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: : "r"(val), "r"(p) : "r5", "r6", "memory"
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);
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}
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__attribute__((noinline)) void do_strht_imm_132 ( unsigned char* p, UInt* val )
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{
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__asm__ __volatile__(
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"mov r5, %0 ; ldr r6, [r5] ; mov r5, %1; strht r6, [r5, #132]"
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: : "r"(val), "r"(p) : "r5", "r6", "memory"
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);
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}
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__attribute__((noinline)) UInt do_ldrbt_imm_2 (unsigned char* val)
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{
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UInt res;
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__asm__ __volatile__(
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"mov r4, %1 ; ldrbt r5, [r4, #2]; mov %0, r5"
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: "=r"(res) : "r"(val) : "r4", "r5"
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);
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return res;
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}
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__attribute__((noinline)) UInt do_ldrsbt_imm_2 (unsigned char* val)
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{
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UInt res;
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__asm__ __volatile__(
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"mov r4, %1 ; ldrsbt r5, [r4, #2]; mov %0, r5"
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: "=r"(res) : "r"(val) : "r4", "r5"
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);
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return res;
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}
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int main ( void )
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{
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UInt i;
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unsigned char* b = malloc(256);
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for (i = 0; i < 256; i++) b[i] = (unsigned char)i;
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UInt r = do_ldrt_imm_132(b);
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free(b);
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printf("result is 0x%08x (should be 0x%08x)\n", r, 0x87868584);
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UInt val = (200 << 0) | (150 << 8) | (100 << 16) | (10 << 24);
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unsigned char* c = malloc(256);
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for (i = 0; i < 256; i++) c[i] = (unsigned char)i;
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do_strt_imm_132(c, val);
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printf("result is %u %u %u %u %u %u (should be %u %u %u %u %u %u)\n",
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c[131], c[132], c[133], c[134], c[135], c[136],
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131, 200, 150, 100, 10, 136);
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free(c);
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UInt val_bt = 0b11111111;
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unsigned char* d = malloc(256);
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for (i = 0; i < 256; i++) d[i] = (unsigned char)i;
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do_strbt_imm_132(d, &val_bt);
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printf("result is %u %u %u (should be %u %u %u)\n",
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d[131], d[132], d[133], 131, 255, 133);
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free(d);
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UInt val_ht = 0xFFFF;
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unsigned char* e = malloc(256);
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for (i = 0; i < 256; i++) e[i] = (unsigned char)i;
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do_strht_imm_132(e, &val_ht);
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printf("result is %u %u %u %u (should be %u %u %u %u)\n",
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e[131], e[132], e[133], e[134], 131, 255, 255, 134);
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free(e);
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UInt val_ldrbt = (200 << 0) | (150 << 8) | (137 << 16) | (10 << 24);
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printf("result is %u (should be %u)\n",
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do_ldrbt_imm_2((unsigned char*)&val_ldrbt), 137);
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UInt val_ldrsbt = (200 << 0) | (150 << 8) | (254 << 16) | (10 << 24);
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printf("result is %u (should be %u)\n",
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do_ldrsbt_imm_2((unsigned char*)&val_ldrsbt), 4294967294);
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return 0;
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}
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