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| author | Joseph Myers <joseph@codesourcery.com> | 2013-07-02 14:55:32 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-07-02 14:55:32 +0000 |
| commit | 77f01ab5d1d2eead1bd4a9135d6a76ebd3fe21e5 (patch) | |
| tree | 84727a1d5b17bbfe868ef2246e59bffc98f57495 /soft-fp/op-1.h | |
| parent | 1413c693d3390e02399a0042ef97b73918749977 (diff) | |
| download | glibc-77f01ab5d1d2eead1bd4a9135d6a76ebd3fe21e5.tar.gz glibc-77f01ab5d1d2eead1bd4a9135d6a76ebd3fe21e5.tar.xz glibc-77f01ab5d1d2eead1bd4a9135d6a76ebd3fe21e5.zip | |
Implement fma in soft-fp.
Diffstat (limited to 'soft-fp/op-1.h')
| -rw-r--r-- | soft-fp/op-1.h | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/soft-fp/op-1.h b/soft-fp/op-1.h index 8e05e2fab7..a9ad0d62cd 100644 --- a/soft-fp/op-1.h +++ b/soft-fp/op-1.h @@ -72,6 +72,7 @@ do { \ #define _FP_FRAC_ZEROP_1(X) (X##_f == 0) #define _FP_FRAC_OVERP_1(fs,X) (X##_f & _FP_OVERFLOW_##fs) #define _FP_FRAC_CLEAR_OVERP_1(fs,X) (X##_f &= ~_FP_OVERFLOW_##fs) +#define _FP_FRAC_HIGHBIT_DW_1(fs,X) (X##_f & _FP_HIGHBIT_DW_##fs) #define _FP_FRAC_EQ_1(X, Y) (X##_f == Y##_f) #define _FP_FRAC_GE_1(X, Y) (X##_f >= Y##_f) #define _FP_FRAC_GT_1(X, Y) (X##_f > Y##_f) @@ -137,9 +138,14 @@ do { \ /* Basic. Assuming the host word size is >= 2*FRACBITS, we can do the multiplication immediately. */ -#define _FP_MUL_MEAT_1_imm(wfracbits, R, X, Y) \ +#define _FP_MUL_MEAT_DW_1_imm(wfracbits, R, X, Y) \ do { \ R##_f = X##_f * Y##_f; \ + } while (0) + +#define _FP_MUL_MEAT_1_imm(wfracbits, R, X, Y) \ + do { \ + _FP_MUL_MEAT_DW_1_imm(wfracbits, R, X, Y); \ /* Normalize since we know where the msb of the multiplicands \ were (bit B), we know that the msb of the of the product is \ at either 2B or 2B-1. */ \ @@ -148,10 +154,15 @@ do { \ /* Given a 1W * 1W => 2W primitive, do the extended multiplication. */ +#define _FP_MUL_MEAT_DW_1_wide(wfracbits, R, X, Y, doit) \ + do { \ + doit(R##_f1, R##_f0, X##_f, Y##_f); \ + } while (0) + #define _FP_MUL_MEAT_1_wide(wfracbits, R, X, Y, doit) \ do { \ - _FP_W_TYPE _Z_f0, _Z_f1; \ - doit(_Z_f1, _Z_f0, X##_f, Y##_f); \ + _FP_FRAC_DECL_2(_Z); \ + _FP_MUL_MEAT_DW_1_wide(wfracbits, _Z, X, Y, doit); \ /* Normalize since we know where the msb of the multiplicands \ were (bit B), we know that the msb of the of the product is \ at either 2B or 2B-1. */ \ @@ -161,9 +172,10 @@ do { \ /* Finally, a simple widening multiply algorithm. What fun! */ -#define _FP_MUL_MEAT_1_hard(wfracbits, R, X, Y) \ +#define _FP_MUL_MEAT_DW_1_hard(wfracbits, R, X, Y) \ do { \ - _FP_W_TYPE _xh, _xl, _yh, _yl, _z_f0, _z_f1, _a_f0, _a_f1; \ + _FP_W_TYPE _xh, _xl, _yh, _yl; \ + _FP_FRAC_DECL_2(_a); \ \ /* split the words in half */ \ _xh = X##_f >> (_FP_W_TYPE_SIZE/2); \ @@ -172,17 +184,23 @@ do { \ _yl = Y##_f & (((_FP_W_TYPE)1 << (_FP_W_TYPE_SIZE/2)) - 1); \ \ /* multiply the pieces */ \ - _z_f0 = _xl * _yl; \ + R##_f0 = _xl * _yl; \ _a_f0 = _xh * _yl; \ _a_f1 = _xl * _yh; \ - _z_f1 = _xh * _yh; \ + R##_f1 = _xh * _yh; \ \ /* reassemble into two full words */ \ if ((_a_f0 += _a_f1) < _a_f1) \ - _z_f1 += (_FP_W_TYPE)1 << (_FP_W_TYPE_SIZE/2); \ + R##_f1 += (_FP_W_TYPE)1 << (_FP_W_TYPE_SIZE/2); \ _a_f1 = _a_f0 >> (_FP_W_TYPE_SIZE/2); \ _a_f0 = _a_f0 << (_FP_W_TYPE_SIZE/2); \ - _FP_FRAC_ADD_2(_z, _z, _a); \ + _FP_FRAC_ADD_2(R, R, _a); \ + } while (0) + +#define _FP_MUL_MEAT_1_hard(wfracbits, R, X, Y) \ + do { \ + _FP_FRAC_DECL_2(_z); \ + _FP_MUL_MEAT_DW_1_hard(wfracbits, _z, X, Y); \ \ /* normalize */ \ _FP_FRAC_SRS_2(_z, wfracbits - 1, 2*wfracbits); \ |