diff options
Diffstat (limited to 'sim')
| -rw-r--r-- | sim/sh/ChangeLog | 6 | ||||
| -rw-r--r-- | sim/sh/gencode.c | 38 | ||||
| -rw-r--r-- | sim/sh/interp.c | 49 |
3 files changed, 87 insertions, 6 deletions
diff --git a/sim/sh/ChangeLog b/sim/sh/ChangeLog index 2b6cf43..faa6ebc 100644 --- a/sim/sh/ChangeLog +++ b/sim/sh/ChangeLog @@ -1,3 +1,9 @@ +2003-11-03 J"orn Rennecke <joern.rennecke@superh.com> + + * interp.c (fsca_s, fsrra_s): New functions. + * gencode.c (tab): Add entries for fsca and fsrra. + (expand_opcode): Allow variable length n / m fields. + 2003-10-15 J"orn Rennecke <joern.rennecke@superh.com> * syscall.h (SYS_truncate, SYS_ftruncate): Define. diff --git a/sim/sh/gencode.c b/sim/sh/gencode.c index a4a1c2d..07d62a9 100644 --- a/sim/sh/gencode.c +++ b/sim/sh/gencode.c @@ -449,6 +449,17 @@ op tab[] = }, /* sh4 */ + { "", "", "fsca", "1111nnn011111101", + "if (FPSCR_PR)", + " RAISE_EXCEPTION (SIGILL);", + "else", + " {", + " SET_FR (n, fsca_s (FPUL, &sin));", + " SET_FR (n+1, fsca_s (FPUL, &cos));", + " }", + }, + + /* sh4 */ { "", "", "fschg", "1111001111111101", "SET_FPSCR (GET_FPSCR() ^ FPSCR_MASK_SZ);", }, @@ -458,6 +469,14 @@ op tab[] = "FP_UNARY(n, sqrt);", }, + /* sh4 */ + { "", "", "fsrra", "1111nnnn01111101", + "if (FPSCR_PR)", + " RAISE_EXCEPTION (SIGILL);", + "else", + " SET_FR (n, fsrra_s (FR (n)));", + }, + /* sh2e */ { "", "", "fsub <FREG_M>,<FREG_N>", "1111nnnnmmmm0001", "FP_OP(n, -, m);", @@ -1979,6 +1998,8 @@ expand_opcode (shift, val, i, s) { int m, mv; + if (s[1] - '0' > 1U || !s[2] || ! s[3]) + expand_opcode (shift - 1, val + s[0] - '0', i, s + 1); val |= bton (s) << shift; if (s[2] == '0' || s[2] == '1') expand_opcode (shift - 4, val, i, s + 4); @@ -2003,12 +2024,17 @@ expand_opcode (shift, val, i, s) } case 'n': case 'm': - for (j = 0; j < 16; j++) - { - expand_opcode (shift - 4, val | (j << shift), i, s + 4); - - } - break; + { + int digits = 1; + while (s[digits] == s[0]) + digits++; + for (j = 0; j < (1 << digits); j++) + { + expand_opcode (shift - digits, val | (j << shift), i, + s + digits); + } + break; + } case 'M': /* A1, A0,X0,X1,Y0,Y1,M0,A1G,M1,M1G */ for (j = 5; j < 16; j++) diff --git a/sim/sh/interp.c b/sim/sh/interp.c index 711df1e..5ca8e61 100644 --- a/sim/sh/interp.c +++ b/sim/sh/interp.c @@ -1411,6 +1411,55 @@ macl (regs, memory, n, m) MACH = mach; } +float +fsca_s (int in, double (*f) (double)) +{ + double rad = ldexp ((in & 0xffff), -15) * 3.141592653589793238462643383; + double result = (*f) (rad); + double error, upper, lower, frac; + int exp; + + /* Search the value with the maximum error that is still within the + architectural spec. */ + error = ldexp (1., -21); + /* compensate for calculation inaccuracy by reducing error. */ + error = error - ldexp (1., -50); + upper = result + error; + frac = frexp (upper, &exp); + upper = ldexp (floor (ldexp (frac, 24)), exp - 24); + lower = result - error; + frac = frexp (lower, &exp); + lower = ldexp (ceil (ldexp (frac, 24)), exp - 24); + return abs (upper - result) >= abs (lower - result) ? upper : lower; +} + +float +fsrra_s (float in) +{ + double result = 1. / sqrt (in); + int exp; + double frac, upper, lower, error, eps; + + /* refine result */ + result = result - (result * result * in - 1) * 0.5 * result; + /* Search the value with the maximum error that is still within the + architectural spec. */ + frac = frexp (result, &exp); + frac = ldexp (frac, 24); + error = 4.; /* 1 << 24-1-21 */ + /* use eps to compensate for possible 1 ulp error in our 'exact' result. */ + eps = ldexp (1., -29); + upper = floor (frac + error - eps); + if (upper > 16777216.) + upper = floor ((frac + error - eps) * 0.5) * 2.; + lower = ceil ((frac - error + eps) * 2) * .5; + if (lower > 8388608.) + lower = ceil (frac - error + eps); + upper = ldexp (upper, exp - 24); + lower = ldexp (lower, exp - 24); + return upper - result >= result - lower ? upper : lower; +} + static struct loop_bounds get_loop_bounds (rs, re, memory, mem_end, maskw, endianw) int rs, re; |