2003-12-18 Michael Snyder <msnyder@redhat.com>
* gencode.c (expand_opcode): Simplify and reorganize.
Eliminate "shift" parameter. Eliminate "4 bits at a time"
assumption. Flatten switch statement to a single level.
Add "eeee" token for even-numbered registers.
(bton): Delete.
(fsca): Use "eeee" token.
(ppi_moves): Rename to "expand_ppi_movxy". Do the ddt
[movx/movy] expansion here, as well as the ppi expansion.
(gensim_caselist): Accept 'eeee' along with 'nnnn'.
This commit is contained in:
Michael Snyder
parent
3d29fdb489
commit
673fc5d0a7
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@ -1,3 +1,15 @@
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2003-12-18 Michael Snyder <msnyder@redhat.com>
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* gencode.c (expand_opcode): Simplify and reorganize.
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Eliminate "shift" parameter. Eliminate "4 bits at a time"
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assumption. Flatten switch statement to a single level.
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Add "eeee" token for even-numbered registers.
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(bton): Delete.
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(fsca): Use "eeee" token.
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(ppi_moves): Rename to "expand_ppi_movxy". Do the ddt
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[movx/movy] expansion here, as well as the ppi expansion.
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(gensim_caselist): Accept 'eeee' along with 'nnnn'.
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2003-11-03 J"orn Rennecke <joern.rennecke@superh.com>
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* interp.c (fsca_s, fsrra_s): New functions.
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171
sim/sh/gencode.c
171
sim/sh/gencode.c
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@ -449,7 +449,7 @@ op tab[] =
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},
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/* sh4 */
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{ "", "", "fsca", "1111nnn011111101",
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{ "", "", "fsca", "1111eeee11111101",
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"if (FPSCR_PR)",
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" RAISE_EXCEPTION (SIGILL);",
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"else",
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@ -1950,128 +1950,100 @@ gengastab ()
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}
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/* Convert a string of 4 binary digits into an int */
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static
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int
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bton (s)
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char *s;
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{
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int n = 0;
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int v = 8;
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while (v)
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{
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if (*s == '1')
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n |= v;
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v >>= 1;
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s++;
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}
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return n;
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}
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static unsigned char table[1 << 16];
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/* Take an opcode expand all varying fields in it out and fill all the
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right entries in 'table' with the opcode index*/
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/* Take an opcode, expand all varying fields in it out and fill all the
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right entries in 'table' with the opcode index. */
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static void
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expand_opcode (shift, val, i, s)
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int shift;
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expand_opcode (val, i, s)
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int val;
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int i;
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char *s;
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{
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int j;
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if (*s == 0)
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{
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table[val] = i;
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}
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else
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{
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int j = 0, m = 0;
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switch (s[0])
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{
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default:
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fprintf (stderr, "expand_opcode: illegal char '%c'\n", s[0]);
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exit (1);
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case '0':
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case '1':
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{
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int m, mv;
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if (s[1] - '0' > 1U || !s[2] || ! s[3])
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expand_opcode (shift - 1, val + s[0] - '0', i, s + 1);
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val |= bton (s) << shift;
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if (s[2] == '0' || s[2] == '1')
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expand_opcode (shift - 4, val, i, s + 4);
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else if (s[2] == 'N')
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for (j = 0; j < 4; j++)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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else if (s[2] == 'x')
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for (j = 0; j < 4; j += 2)
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for (m = 0; m < 32; m++)
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{
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/* Ignore illegal nopy */
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if ((m & 7) == 0 && m != 0)
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continue;
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mv = m & 3 | (m & 4) << 2 | (m & 8) << 3 | (m & 16) << 4;
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expand_opcode (shift - 4, val | mv | (j << shift), i,
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s + 4);
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}
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else if (s[2] == 'y')
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for (j = 0; j < 2; j++)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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/* Consume an arbitrary number of ones and zeros. */
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do {
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j = (j << 1) + (s[m++] - '0');
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} while (s[m] == '0' || s[m] == '1');
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expand_opcode ((val << m) | j, i, s + m);
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break;
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}
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case 'N': /* NN -- four-way fork */
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for (j = 0; j < 4; j++)
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expand_opcode ((val << 2) | j, i, s + 2);
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break;
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case 'x': /* xx -- 2-way fork */
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/* Cross-breeding with movy moved to separate function. */
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for (j = 0; j < 4; j += 2)
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expand_opcode ((val << 2) | j, i, s + 2);
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break;
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case 'y': /* yy -- two-way fork */
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for (j = 0; j < 2; j++)
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expand_opcode ((val << 2) | j, i, s + 2);
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break;
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case 'i': /* eg. "i8*1" */
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case '.': /* "...." is a wildcard */
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case 'n':
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case 'm':
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{
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int digits = 1;
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while (s[digits] == s[0])
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digits++;
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for (j = 0; j < (1 << digits); j++)
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{
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expand_opcode (shift - digits, val | (j << shift), i,
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s + digits);
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}
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break;
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}
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/* nnnn, mmmm, i#*#, .... -- 16-way fork. */
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for (j = 0; j < 16; j++)
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expand_opcode ((val << 4) | j, i, s + 4);
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break;
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case 'e':
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/* eeee -- even numbered register:
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8 way fork. */
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for (j = 0; j < 15; j += 2)
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expand_opcode ((val << 4) | j, i, s + 4);
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break;
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case 'M':
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/* A1, A0,X0,X1,Y0,Y1,M0,A1G,M1,M1G */
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for (j = 5; j < 16; j++)
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if (j != 6)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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/* A0, A1, X0, X1, Y0, Y1, M0, M1, A0G, A1G:
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MMMM -- 10-way fork */
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expand_opcode ((val << 4) | 5, i, s + 4);
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for (j = 7; j < 16; j++)
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expand_opcode ((val << 4) | j, i, s + 4);
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break;
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case 'G':
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/* A1G, A0G: */
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/* A1G, A0G:
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GGGG -- two-way fork */
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for (j = 13; j <= 15; j +=2)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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expand_opcode ((val << 4) | j, i, s + 4);
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break;
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case 's':
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/* ssss -- 10-way fork */
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/* System registers mach, macl, pr: */
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for (j = 0; j < 3; j++)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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expand_opcode ((val << 4) | j, i, s + 4);
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/* System registers fpul, fpscr/dsr, a0, x0, x1, y0, y1: */
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for (j = 5; j < 12; j++)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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expand_opcode ((val << 4) | j, i, s + 4);
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break;
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case 'X':
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case 'a':
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val |= bton (s) << shift;
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for (j = 0; j < 16; j += 8)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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/* XX, aa -- two-way fork */
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for (j = 0; j < 4; j += 2)
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expand_opcode ((val << 2) | j, i, s + 2);
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break;
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case 'Y':
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case 'A':
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val |= bton (s) << shift;
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for (j = 0; j < 8; j += 4)
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expand_opcode (shift - 4, val | (j << shift), i, s + 4);
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/* YY, AA -- two-way fork */
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for (j = 0; j < 2; j++)
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expand_opcode ((val << 2) | j, i, s + 2);
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break;
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default:
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for (j = 0; j < (1 << (shift + 4)); j++)
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{
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table[val | j] = i;
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}
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}
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}
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}
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@ -2127,7 +2099,7 @@ filltable (p)
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for (; p->name; p++)
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{
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p->index = index++;
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expand_opcode (12, 0, p->index, p->code);
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expand_opcode (0, p->index, p->code);
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}
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}
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@ -2136,10 +2108,28 @@ filltable (p)
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processing insns (ppi) for code 0xf800 (ppi nopx nopy). Copy the
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latter tag to represent all combinations of ppi with ddt. */
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static void
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ppi_moves ()
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expand_ppi_movxy ()
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{
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int i;
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for (i = 0xf000; i < 0xf400; i++)
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if ((i & 3) == 0 && (i & 12) != 0 && table[i] != 0)
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{
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/* A movx insn, which needs to be filled out with the
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corresponding movy insns. This used to be done in
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expand_opcode. */
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int m, mv;
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for (m = 0; m < 32; m++)
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{
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/* Ignore illegal nopy */
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if ((m & 7) == 0 && m != 0)
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continue;
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mv = m & 3 | (m & 4) << 2 | (m & 8) << 3 | (m & 16) << 4;
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table [i | mv] = table [i];
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}
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}
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for (i = 0xf000; i < 0xf400; i++)
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if (table[i])
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table[i + 0x800] = table[0xf800];
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@ -2179,7 +2169,8 @@ gensim_caselist (p)
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s += 4;
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break;
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case 'n':
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printf (" int n = (iword >>8) & 0xf;\n");
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case 'e':
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printf (" int n = (iword >> 8) & 0xf;\n");
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needn = 1;
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s += 4;
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break;
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@ -2202,7 +2193,7 @@ gensim_caselist (p)
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case 's':
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case 'M':
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case 'G':
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printf (" int m = (iword >>4) & 0xf;\n");
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printf (" int m = (iword >> 4) & 0xf;\n");
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s += 4;
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break;
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case 'X':
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@ -2618,7 +2609,7 @@ main (ac, av)
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memset (table, 0, sizeof table);
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filltable (movsxy_tab);
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ppi_moves ();
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expand_ppi_movxy ();
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dumptable ("sh_dsp_table", 1 << 12, 0xf000);
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memset (table, 0, sizeof table);
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