diff options
Diffstat (limited to 'sysdeps/x86_64/fpu')
| -rw-r--r-- | sysdeps/x86_64/fpu/e_expl.S | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sysdeps/x86_64/fpu/e_expl.S b/sysdeps/x86_64/fpu/e_expl.S index 0ebe3882a5..866bad2c6e 100644 --- a/sysdeps/x86_64/fpu/e_expl.S +++ b/sysdeps/x86_64/fpu/e_expl.S @@ -65,6 +65,10 @@ c1: .byte 0x20, 0xfa, 0xee, 0xc2, 0x5f, 0x70, 0xa5, 0xec, 0xed, 0x3f csat: .byte 0, 0, 0, 0, 0, 0, 0, 0x80, 0x0e, 0x40 .byte 0, 0, 0, 0, 0, 0 ASM_SIZE_DIRECTIVE(csat) + .type cmin,@object +cmin: .byte 0, 0, 0, 0, 0, 0, 0, 0x80, 0x1, 0 + .byte 0, 0, 0, 0, 0, 0 + ASM_SIZE_DIRECTIVE(cmin) #endif #ifdef PIC @@ -182,8 +186,17 @@ ENTRY(IEEE754_EXPL) fstp %st(1) /* 2 */ fscale /* 2 scale factor is st(1); base^x */ fstp %st(1) /* 1 */ + /* Ensure underflow for tiny result. */ + fldt MO(cmin) /* 2 cmin */ + fld %st(1) /* 3 */ + fcomip %st(1), %st /* 2 */ + fstp %st /* 1 */ + jnc 6f + fld %st + fmul %st + fstp %st #endif - fstp %st(1) /* 0 */ +6: fstp %st(1) /* 0 */ jmp 2f 1: #ifdef USE_AS_EXPM1L |